IRS Crypto Letter: What Each Notice Means and How to Respond

Last Updated on July 10, 2026 by Patrick Camuso, CPA

Quick answer (read this first):

What it means when the IRS contacts you about crypto: An IRS crypto letter means the agency has data suggesting your digital asset activity was not fully or accurately reported. The letter does not mean you are being audited, and it does not mean the IRS is correct. It means there is a discrepancy between what the IRS received from a third party and what appeared on your return, or that the IRS believes you had reportable activity you did not disclose.

The first thing to determine: Which letter you received. The response a letter requires ranges from no reply at all to a firm deadline with legal consequences for silence. Sending the wrong response, or ignoring a letter that demands one, can turn a manageable notice into a much larger problem.

What most of these letters have in common: The IRS number, where one is stated, is frequently wrong for crypto. Third-party reporting shows proceeds without basis, which makes gains look far larger than they actually were. The correct response is almost never to simply pay what the notice says.

What to do: Identify the letter, understand what it signals about the data the IRS holds, and respond with accurate reconstructed records rather than either ignoring it or accepting an inflated number. The sections below identify each letter and link to a detailed guide for the one you received.

Identifying Your IRS Crypto Letter

The single most important step after receiving an IRS letter about cryptocurrency is identifying exactly which notice it is, because the required response varies dramatically from one to the next. The letters are not interchangeable, and by the IRS’s own account the stronger letters go to taxpayers whose data suggests a higher risk of non-compliance, which means the version you received is itself a signal of how confident the agency is about what it holds. The sections below cover the letters and notices crypto investors most commonly receive, with the severity of each and whether a response is required.

Letter 6173

Letter 6173 is a response-required letter sent to taxpayers the IRS believes had reportable digital asset transactions that were not properly reported, and it demands a response by a stated deadline, which can sometimes be extended by written request. The letter directs the taxpayer down one of three paths, filing delinquent returns, amending incorrect ones, or submitting a statement of facts, signed under penalties of perjury, documenting a complete history of previously reported crypto income and demonstrating that the original filings were compliant.

That perjury statement is what makes a careless response dangerous, because certifying compliance that does not hold up converts a civil reporting issue into something that can support far more serious consequences, and a false certification is one of the few responses worse than silence. The letter occupies an unusual procedural position, one the National Taxpayer Advocate has formally criticized, because it demands examination-level document production and a sworn statement without providing the procedural rights and protections an actual examination carries, and it can request information covering years outside the normal assessment window. A soft letter is not formally the start of an examination, but the IRS has acknowledged that the response, or the absence of one, factors directly into what the agency does next. Ignoring a 6173 can escalate the matter to examination. This is the highest-stakes letter in the soft-letter family, and our guide to IRS Letter 6173 walks through the deadline, the response requirements, and what an adequate reply contains.

Letter 6174

Letter 6174 is a no-response-required advisory letter. The IRS sends it to taxpayers it believes hold or transact in digital assets, as an educational reminder of reporting obligations. It does not allege a specific discrepancy and does not require a reply, but receiving one signals that the IRS has associated your identity with digital asset activity, which means the underlying data exists whether or not this particular letter demands anything. The compliance-before-escalation window it opens is covered alongside its close variant in our guide to Letters 6174 and 6174-A.

Letter 6174-A

Letter 6174-A is also framed as not strictly requiring a response, but it is more pointed than the 6174. It advises the taxpayer that the IRS has information indicating potential non-compliance and warns that future enforcement action may follow if reporting is not corrected. The distinction between “no response required” and “no action advisable” matters most here, and the reason is more than tactical. The letter creates a documented record that the taxpayer was put on notice. If a later examination confirms underreporting, that record can shift the willfulness analysis against the taxpayer, which matters enormously because willfulness generally separates a 20 percent accuracy-related penalty from a 75 percent civil fraud penalty, and reasonable cause defenses become much harder to sustain once the IRS can show the taxpayer was warned and did nothing. A 6174-A is frequently the last soft touch before the matter escalates. This is the exact fact pattern behind one of our resolution engagements, and it is covered in the same Letters 6174 and 6174-A guide.

CP2000 Notice

A CP2000 is a proposed adjustment generated by the IRS Automated Underreporter program when third-party data does not match a filed return, and it typically proposes additional tax plus interest and often a 20 percent accuracy-related penalty. The response deadline is generally 30 days from the notice date, or 60 days for taxpayers outside the United States, and interest continues accruing on any unpaid balance while the matter is disputed.

For crypto, the CP2000 is frequently wrong, because the IRS calculates it from third-party proceeds data with no cost basis, which makes the proposed tax dramatically overstated. Silence is the worst option available, and the reason is structural. The Automated Underreporter system proposes the accuracy-related penalty by computer, without a human reviewing the file, and a human only evaluates whether that penalty is actually appropriate if the taxpayer responds. Nonresponse means the computer converts the proposed penalty into an assessment automatically, the IRS issues a Statutory Notice of Deficiency, and the administrative options narrow to a 90-day Tax Court window followed by assessment and a collections sequence that runs through escalating balance-due notices toward liens, levies, and wage garnishment. Responding is what brings a human being into the review. A close sibling, the CP2501, flags the same kind of mismatch without stating a proposed amount and is handled through the same disciplined reconciliation. Because 1099-DA matching is now live, CP2000 volume for crypto is expected to rise sharply, and our guide to the crypto CP2000 notice covers the mechanics, the response options, and when to dispute rather than amend.

Examination Letters

An examination letter means the matter has moved from automated correspondence into an actual audit, whether a correspondence exam conducted by mail or a field exam. At this stage the IRS is requesting documentation and substantiation directly, and the scope is broader than most investors expect. In active crypto examinations, the IRS has been issuing information document requests that cover the taxpayer’s complete digital asset custody history, including every exchange, wallet, and self-custody address ever used, routinely spanning more than one hundred platforms and reaching back to the beginning of the taxpayer’s activity rather than staying confined to the year under examination. The outcome depends heavily on whether the taxpayer can produce reconstructed, defensible records for that full history, and our guide to the crypto tax audit covers triggers, document requests, and how reconstruction determines outcomes.

Why the IRS Sends Crypto Letters

Understanding why these letters exist explains why their volume is rising and why the data behind them is often more complete than taxpayers assume. The scale of the underlying compliance gap is now documented at the source. Academic research using anonymized IRS administrative data covering every tax return filed from 2013 through 2021, co-authored by Dr. Tyler Mensor, CPA, of Texas Christian University and covered on our podcast The Financial Frontier, estimates that only 32 to 56 percent of US crypto owners report their sales to the IRS. Roughly half of crypto owners, and possibly well more than half, are not reporting, and the agency has spent a decade building the data pipeline behind these letters in response.

The current enforcement posture did not appear overnight. It traces back to the IRS establishing digital asset compliance as a priority, including the launch of Operation Hidden Treasure, a dedicated initiative pairing IRS criminal investigation with civil enforcement to identify unreported cryptocurrency income. Alongside that internal buildout, the IRS obtained transaction data directly from major exchanges through John Doe summonses, court-authorized demands that compel an exchange to hand over records for entire categories of users rather than named individuals. Through those summonses the IRS acquired years of historical customer data from major platforms, which is why a letter can reference activity from long before any current reporting regime existed.

The newest and most significant layer is Form 1099-DA matching. Beginning with 2025 transactions, custodial brokers report digital asset proceeds directly to the IRS, and the agency feeds that data into the same automated matching system that has generated CP2000 notices for traditional securities for decades. For 2025, brokers report gross proceeds without cost basis in most cases, which means the IRS receives one half of the gain calculation and matches it against whatever the taxpayer filed. Where the return does not reconcile cleanly against broker-reported proceeds, whether because basis was undocumented, activity went unreported, or records simply diverge, the discrepancy surfaces automatically, at scale, without a human reviewing the file first. The volume of crypto notices is set to increase substantially as those matching cycles complete, and the discrepancies driving them will increasingly come from machine matching rather than targeted investigation.

The scale of the reporting wave is unlike anything the agency has processed before, with industry estimates running as high as eight billion 1099-DA forms annually, and the practical consequence is that enforcement is expected to ramp in stages rather than arrive all at once, beginning with automated notices rather than millions of simultaneous audits. That staged rollout is a window rather than a reprieve, because taxpayers who use the early phase to reconcile their records will be in a fundamentally different position when enforcement matures than those who treat the slow start as a reason to wait. Transition relief adds a trap of its own, because brokers operating under good-faith penalty relief are permitted to furnish 1099-DA forms late, sometimes months after returns are filed, and IRS matching does not pause while that data catches up. A taxpayer can file correctly in April and still draw a notice later in the year when the IRS matches the return against broker data it received afterward, which is one more reason compliant investors receive these letters alongside noncompliant ones. We cover the mechanics of that reporting regime in our guide to Form 1099-DA.

What the IRS Already Knows About Your Crypto

A common instinct after receiving a crypto letter is to wonder whether the IRS is bluffing, working from thin data and hoping the taxpayer volunteers the rest. For most recipients, the answer is that the IRS knows considerably more than they assume.

Through the John Doe summonses, the IRS obtained years of historical customer records from major exchanges, including account holder identities, transaction histories, and transfer records, covering activity that in some cases predates any current reporting requirement by nearly a decade. The thresholds in those summonses reached accounts with as little as twenty thousand dollars in transactions across multiple years, which means the data sweep captured ordinary retail investors, not just whales. Crypto exchanges issued over eight million 1099 forms in 2024 alone, each one a data point already sitting in IRS systems. The agency also maintains contracts with blockchain analytics firms including Chainalysis and TRM Labs, which means on-chain activity, DeFi interactions, and DEX trading are traceable even for investors who never touched a centralized exchange. And beginning with 2025 transactions, Form 1099-DA delivers standardized, broker-sourced proceeds data directly into the automated matching pipeline.

The scope of what the IRS demands once a matter reaches examination confirms how seriously the agency treats custody history. The information document requests being issued in active crypto audits require the taxpayer’s complete digital asset custody history, every exchange, wallet, and self-custody address ever used, across what routinely amounts to more than one hundred platforms. An inquiry that begins with one year’s discrepancy can reach the entire history, which is one more reason prior years cannot be treated as resolved simply because time has passed.

The year of activity a letter references tells you which data source triggered it. A letter pointing at 2017 through 2021 activity generally traces to summons data or analytics work, which means the evidence problem is historical reconstruction. A letter or notice tied to 2025 and later activity generally traces to 1099-DA matching, which means the problem is current-year reconciliation against broker-reported proceeds. Either way, the productive assumption is that the IRS already holds your transaction data, and the question is not whether they can see the activity but whether you can substantiate what it actually cost and what the real gain was.

The Underlying Problem Most Letters Expose

Behind the majority of crypto letters sits a problem larger than the letter itself. Most investors who receive one have never performed historical accounting at the tax-lot level. Their basis records live in a patchwork of exchange exports, abandoned software accounts, and memory. Some platforms they used no longer exist, transfers between wallets were never documented, and software was run once, years ago, on incomplete data, and the output was filed without anyone verifying that the lots traced back to documented acquisitions.

For these investors, the letter is not really a dispute about a number. It is the moment their lack of historical accounting becomes an enforcement problem, because every response option, whether disputing a CP2000, signing a 6173 statement, or producing documents in an examination, depends on records that do not currently exist in defensible form. The IRS holds proceeds data from third parties and the taxpayer holds the burden of proving basis, and a taxpayer who cannot substantiate basis is arguing against the government’s numbers with nothing in hand.

Compounding the problem, the software that generated those filed numbers offers no protection when the letter arrives. Dr. Mensor’s separate research on crypto tax software, also covered on The Financial Frontier, documented that an identical set of cryptocurrency transactions can produce different results across platforms and even within the same platform over time, because each service applies its own undisclosed default assumptions to events the blockchain itself cannot classify, and each recalculates the entire history from scratch on every session. The same research found that the major platforms disclaim all liability in their terms of service and explicitly state they do not provide tax advice, which means good faith reliance on software output almost certainly does not support a penalty defense the way reliance on a licensed professional who signed the return can. Most platforms also provide no lot-level carryforward report showing what is held and at what basis after each year, which leaves the taxpayer unable to trace which lots the software relieved or to move cleanly to another provider. The taxpayer who filed from a software report and now faces a letter is defending numbers that no one stands behind, produced by a platform that may calculate them differently today than it did when the return was filed.

This is why the substantive work behind nearly every letter response is cost basis reconstruction, rebuilding the transaction history across exchanges, wallets, and on-chain activity into a lot-level ledger that can support the position taken in the response. Investors in this situation should start with our guide to reconstructing crypto cost basis when exchange history is gone, which covers what the IRS expects when primary records are unavailable and how the evidence hierarchy works.

The Escalation Ladder

The letters above are not independent events. They sit on a ladder, and understanding where a given letter falls tells you how much time and room you have to respond well.

The ladder generally runs from soft letter to automated notice to correspondence examination to full audit. A soft letter, meaning a 6173, 6174, or 6174-A, is the earliest and least severe rung. It signals that the IRS has data but has not yet proposed a specific adjustment. This is the widest window for getting compliant on favorable terms, because correcting the issue before the IRS proposes a number is almost always better than correcting it afterward. A CP2000 is the next rung, where the IRS has moved from advisory to a specific proposed assessment with a firm deadline. A correspondence examination escalates further, converting the matter into an audit conducted by mail with direct document requests. A field examination is the most serious rung, an in-person audit with the broadest scope.

Position on the ladder is not fixed. Ignoring a soft letter can move the matter up a rung, while responding to any letter with accurate, reconstructed records can resolve it before it climbs further. Most enforcement activity in the 1099-DA era is expected to resolve at the correspondence stage rather than escalate to audit, and cases typically close when discrepancies are explained and substantiated coherently. Escalation happens when basis cannot be substantiated, responses are inconsistent, or silence and delay erode credibility. We cover how that first wave of automated enforcement will unfold in our investor’s playbook for the first wave of 1099-DA tax notices. The earlier the intervention, the more options remain available, which is why identifying the letter and acting on it promptly matters as much as the substance of the response itself.

What to Do in the First 48 Hours

The period immediately after a letter arrives is where the most consequential mistakes happen, usually through panic or through the opposite instinct of setting the letter aside. A measured sequence in the first two days puts the response on solid footing.

Start by identifying the exact letter or notice number, which appears in the upper corner of the document, and confirm it against the descriptions above, because everything downstream depends on which letter it is. Calendar the deadline immediately if the letter carries one. A CP2000 runs on a 30-day clock and a 6173 states its own response date, and deadlines missed in the shuffle convert manageable notices into assessed liabilities. Request your IRS transcripts, specifically the wage and income transcripts for the years referenced, because they show exactly what third-party data the IRS is matching against, which turns the response from guesswork into reconciliation. Preserve everything now, including exports from every tax software platform you have ever used, exchange records, and wallet histories, since platforms shut down and software recalculates, and the record you can produce today may not be reproducible in six months.

Just as important is what not to do. Do not call the IRS unprepared, because statements made in that call become part of the record. Do not amend returns reactively before your records have been reconstructed and reconciled, because an amendment built on the same flawed data as the original filing compounds the problem rather than fixing it. And do not pay a proposed amount simply to make the letter go away, because with crypto that amount is usually calculated from proceeds with no basis and paying it means paying tax on gains that never existed.

Why the IRS Number Is Usually Wrong for Crypto

A theme runs through nearly every crypto letter that proposes a dollar figure. The number is almost always overstated, often dramatically, and the reason is structural. Third-party reporting captures proceeds, meaning the gross amount received from a sale, but it frequently does not capture cost basis, meaning what the asset originally cost. When the IRS computes a proposed tax from proceeds alone, it is effectively treating the entire sale amount as gain, as though the asset had been acquired for nothing.

For an investor who bought an asset for ninety thousand dollars and sold it for one hundred thousand, the actual gain is ten thousand. If the IRS sees only the hundred thousand in proceeds with no basis, its automated system can propose tax on the full hundred thousand. That is the phantom-gains problem, and it is why the correct response to a crypto notice is almost never to pay the stated amount. It is to reconstruct the accurate basis, recompute the real gain, and respond with documentation that establishes the correct figure. The IRS’s own oversight history bears this out, since the National Taxpayer Advocate has reported that automated underreporter cases produce significantly higher reconsideration and abatement rates than any other IRS examination program, which is a formal way of saying these computer-generated numbers are wrong often enough that disputing them is frequently the right call.

The missing basis is not a broker error that a corrected form will fix. For most assets with any real history, meaning anything acquired before 2026, transferred between platforms, moved through self-custody, or touched by DeFi activity, brokers lack the custody lineage to calculate basis and in many cases are not permitted to report it. The 1099-DA the IRS receives is a partial ledger by design, and the burden of supplying the missing half falls entirely on the taxpayer. For investors whose historical accounting was incomplete or never performed at the lot level, that burden means reconstruction, working through exchange records, on-chain data, and secondary documentation to rebuild a defensible basis position. This is why cost basis reconstruction sits at the center of nearly every crypto letter resolution. Our crypto cost basis reconstruction practice is built around exactly this work, and our guide to why 1099-DA forms arrive with missing cost basis explains the structural reasons the gap exists.

The Mistakes That Make Crypto Letters Worse

Certain responses reliably convert a manageable letter into a larger problem, and they recur often enough to name directly.

Paying the CP2000 amount to close the matter quickly locks in tax on phantom gains, because the proposed figure was computed from proceeds with no basis, and payment forfeits the opportunity to establish the real number. Signing the Letter 6173 statement without first verifying that prior filings were actually accurate is more dangerous still, because that statement is made under penalties of perjury, and attesting to compliance that does not hold up converts a civil reporting issue into something far more serious. Amending returns reactively, before records have been reconstructed, produces amended filings built on the same defective data as the originals and signals disorganization to the IRS rather than resolution.

A related procedural trap catches taxpayers who file a Form 1040-X in response to a CP2000 instead of answering through the notice channel, because the amended return process and the CP2000 process run through separate IRS systems, and crossing them creates processing confusion that delays resolution. Disputing a CP2000 also means preserving rights along the way, stating disagreement on the response form rather than signing the consent, and requesting an appeal in the response so the option remains open if the AUR unit does not accept the documentation. Ignoring the soft letters because they say no response is required wastes the one window where compliance can be established before the IRS proposes a number. And responding with raw software outputs as though they were substantiation misunderstands what the IRS evaluates, because a software-generated gain report that cannot trace its lots to documented acquisitions is a calculation, not evidence.

Can You Just Wait It Out

A question many recipients quietly ask is whether the letter can simply be outlasted, and the statute of limitations makes that a losing bet. The IRS generally has three years from filing to assess additional tax, six years where a return omits a substantial amount of income, and no time limit at all for years that were never filed or where fraud is involved. For crypto investors with significant unreported activity, the six-year window is frequently in play, and for anyone with unfiled years the clock has never started running. Waiting also runs the calendar in the wrong direction for evidence, since exchanges shut down, software platforms disappear, and records that could support a defensible basis position today become unrecoverable while the assessment window stays open.

When the Problem Is Bigger Than a Letter

Everything above assumes the underlying noncompliance was non-willful, the product of bad records, misunderstood rules, or software that produced wrong numbers. For taxpayers whose past conduct was knowing, meaning they understood the reporting obligation and chose not to meet it, the calculus changes, and the right path may run through the IRS Voluntary Disclosure Practice rather than ordinary amended returns.

The Voluntary Disclosure Practice allows taxpayers with willful noncompliance to come forward, disclose fully, and pay what is owed with penalties in exchange for protection from criminal referral. The application, Form 14457, already includes a dedicated virtual currency section. Eligibility carries a hard timing requirement, because the taxpayer must come forward before the IRS has opened an investigation, which means the window narrows as enforcement data accumulates and can close entirely once a matter escalates. A soft letter does not by itself foreclose the option, but waiting until the enforcement ladder has climbed can.

This area is also about to change. Following a public comment period on modernizing the program that closed in March 2026, driven in part by the volume of crypto-related disclosures the IRS has been receiving, the agency has indicated that crypto-specific voluntary disclosure rules are expected within months. Taxpayers weighing a disclosure decision should be watching that guidance closely, because the terms under which crypto disclosures are processed may look different by the time it lands.

Taxpayers with willful-conduct years sometimes attempt a quiet disclosure, filing amended returns through normal channels without entering the program, hoping the corrections pass unnoticed. That approach flags the years to the IRS without securing any of the protections the program provides, and it is a decision that should never be made without professional advice. Whether past conduct was willful or non-willful is a legal determination with high stakes, and it deserves a careful assessment before any filing strategy is chosen.

State Tax Exposure Runs on a Parallel Track

An IRS letter is rarely the end of the exposure, because state tax agencies run their own enforcement on a parallel track. The IRS and state revenue departments share information, which means a federal adjustment from a CP2000 or an examination typically propagates to the taxpayer’s state, generating a parallel state notice with its own deadlines and its own penalty structure. Federal amendments generally trigger state amendment obligations as well, so a corrected federal return that ignores the state side leaves the job half done. States are also expected to use 1099-DA data directly to match crypto proceeds against state returns, flag missing filings, and scrutinize residency claims, often more aggressively and with less transition relief than the federal government offers. A complete response plan accounts for both tracks from the start rather than discovering the state notice months after the federal matter closed.

Responding to an IRS Crypto Letter

Every crypto letter, from the softest advisory to an active examination, comes down to the same underlying requirement, which is the taxpayer’s ability to produce accurate, defensible records for the activity in question. A soft letter is an opportunity to establish those records before the IRS proposes a number. A CP2000 is an opportunity to correct an inflated proposed number with them. An examination is where those records are tested directly.

A question that stops many recipients from responding at all is whether engaging with the IRS invites broader scrutiny, and the record points the other way. A good-faith response built on documentation rarely expands the matter, and what actually widens scope is a sloppy one, a response that opens new issues, admits unreported income from other years, or contradicts positions taken on prior returns. This is one more reason the response needs to be built on reconciled records before it is submitted rather than assembled loosely under deadline pressure. As for what happens afterward, response processing generally runs several weeks to a few months, the IRS either accepts the documentation and corrects the proposal or replies with next-step options, and interim letters asking for additional processing time are routine rather than a signal that something has gone wrong.

The penalties themselves are a second front in the response, separate from the tax number. The 20 percent accuracy-related penalty that typically rides on a CP2000 is not automatic and can be defeated where the taxpayer acted with reasonable cause and in good faith, an argument with particular force in crypto given how much of the underlying tax treatment remains genuinely unsettled. First-time abatement is also available for taxpayers with a clean three-year compliance history. The procedural catch is timing, because accuracy penalty defenses generally need to be raised during the CP2000 or examination process itself, and waiting until after assessment forces the matter into the far slower reconsideration channel. Even past a missed deadline, options remain, including audit reconsideration, refund claims after payment, and collection due process rights, so a blown deadline narrows the path without closing it. And where the corrected number is still more than the taxpayer can pay, the response is a payment strategy rather than surrender, through installment agreements, Offers in Compromise where the facts support one, or Currently Not Collectible status while circumstances recover.

Receiving one of these letters is not a criminal investigation, and the overwhelming majority of crypto non-compliance resolves civilly through corrected filings, penalties, and interest. The paths that create genuinely serious exposure are the avoidable ones, certifying compliance falsely under the 6173 perjury statement or ignoring documented warnings until willfulness becomes arguable. Taxpayers who correct proactively are treated materially better than those who wait, with lower penalties, more abatement options available, and far less procedural complexity.

For taxpayers who have unfiled years behind the letter, filing accurate back returns is often the necessary first step, and we cover that specific situation in our guide to fixing crypto taxes for years you never filed. For everything from notice response through audit defense, our cryptocurrency tax resolution practice handles the matter from transcript analysis through direct communication with the IRS, and has resolved six and seven figure IRS disputes for investors through amended returns, proper basis allocation, penalty abatement, and structured payment arrangements. Work with a crypto CPA established in this market since 2016.

Contact us to discuss the letter you received

Frequently Asked Questions

What does it mean if I received an IRS letter about crypto?

It means the IRS has information indicating your digital asset activity may not have been fully or accurately reported. Depending on the specific letter, that information could come from a third-party report like a Form 1099-DA, from exchange data the IRS obtained through a John Doe summons, or from blockchain analysis. The letter does not automatically mean you are being audited or that the IRS figure is correct. The first step is to identify which letter you received, because the required response ranges from no reply at all to a firm deadline with legal consequences for silence.

What are the different IRS crypto letters?

The letters crypto investors most commonly receive are Letter 6173, which requires a response and can include a statement signed under penalties of perjury, Letters 6174 and 6174-A, which are advisory soft letters, the CP2000, which is an automated notice proposing specific additional tax with a 30-day deadline, and examination letters, which indicate an active audit. Each carries a different level of severity and a different required response, which is why identifying the specific letter is the essential first step.

Do I have to respond to an IRS crypto letter?

It depends on the letter you received. Letter 6173 requires a response by a stated deadline. A CP2000 requires a response within 30 days. Letters 6174 and 6174-A do not strictly require a response, but that does not mean no action is advisable, because they signal that the IRS has data associating you with digital asset activity and often precede escalation. The safest approach with any crypto letter is to identify it precisely and respond appropriately rather than assuming silence is safe.

Did a person at the IRS review my notice before it was sent?

Generally no. CP2000 notices are generated by the Automated Underreporter system, which matches third-party data against filed returns and proposes tax and penalties by computer. A human typically evaluates whether the proposed penalty is appropriate only if the taxpayer responds. If no response arrives, the system converts the proposal into an assessment automatically. This is one of the strongest reasons to respond rather than ignore the notice, because the response is what brings human judgment into a process that otherwise runs on machine matching from start to finish.

Why is the amount on my IRS crypto notice so high?

The amount is usually overstated because the IRS calculates it from third-party proceeds data without cost basis. When the system treats the entire sale amount as gain, as though the asset had cost nothing to acquire, the proposed tax can be many times the actual liability, which is the phantom-gains problem. The correct response is to reconstruct the accurate cost basis, recompute the real gain, and respond with documentation establishing the correct figure rather than paying the inflated proposed amount.

What happens if I ignore an IRS crypto letter?

Ignoring a letter that requires a response escalates the matter up the enforcement ladder. A soft letter left unanswered can move toward examination, and ignoring a 6174-A creates a documented record that the taxpayer was warned, which can shift a later willfulness analysis against them. An unanswered CP2000 is treated as agreement, after which the IRS issues a Statutory Notice of Deficiency, the administrative options narrow to a 90-day Tax Court window, and the overstated amount driven by missing basis gets assessed as though it were correct. The earlier a taxpayer responds with accurate records, the more options remain available to resolve the matter favorably.

Why does ignoring Letter 6174-A matter if no response is required?

Because the letter itself becomes evidence, creating a documented record that the IRS put the taxpayer on notice about digital asset reporting obligations. If a subsequent examination confirms underreporting, that record strengthens the government’s willfulness case, and willfulness generally separates a 20 percent accuracy-related penalty from a 75 percent civil fraud penalty. Reasonable cause defenses are also harder to sustain once the IRS can show the taxpayer was warned and took no corrective action. The letter requires nothing, but the window it opens for correcting reporting before escalation is the most valuable thing about it.

Does the IRS actually know about my crypto activity?

In most cases, yes, and usually more than the recipient assumes. The IRS obtained years of historical customer records from major exchanges through John Doe summonses, receives millions of 1099 forms from crypto platforms annually, contracts with blockchain analytics firms including Chainalysis and TRM Labs to trace on-chain and DeFi activity, and now receives standardized proceeds data directly from brokers on Form 1099-DA. A letter means your identity has already been associated with digital asset activity in IRS data. The productive question is not whether the IRS can see the transactions but whether you can substantiate the basis behind them.

Can I just ignore the letter and wait out the statute of limitations?

That strategy rarely works for crypto investors. The IRS generally has three years from filing to assess additional tax, six years where a substantial amount of income was omitted, and unlimited time for unfiled years or fraud. Crypto investors with significant unreported activity are frequently inside the six-year window, and anyone with unfiled years has no statute running at all. Waiting also degrades the evidence needed for a defense, because exchanges shut down and software platforms disappear, taking recoverable basis records with them.

What if my past crypto noncompliance was intentional?

Taxpayers whose past conduct was willful may be candidates for the IRS Voluntary Disclosure Practice, which trades full disclosure and payment of tax and penalties for protection from criminal referral. The application includes a dedicated virtual currency section, and eligibility requires coming forward before the IRS opens an investigation, so the option narrows as enforcement escalates. The IRS has also signaled that crypto-specific voluntary disclosure rules are expected in the near term following a public comment period on modernizing the program. Whether conduct was willful is a legal determination that should be assessed with professional guidance before choosing any filing path, and quietly amending returns outside the program is a risk that should not be taken without that assessment.

Will responding to an IRS crypto letter trigger a bigger audit?

A good-faith response supported by documentation rarely expands the matter, and most correspondence-level cases close when the discrepancy is explained and substantiated coherently. What widens scope is a poorly built response, one that opens new issues, admits unreported income from other years, or contradicts positions on prior returns. The practical takeaway is not to avoid responding but to reconcile the records first, so the response answers the question the IRS asked without creating new ones.

Will crypto IRS letters become more common?

Yes. Beginning with 2025 transactions, custodial brokers report digital asset proceeds directly to the IRS on Form 1099-DA, and the agency feeds that data into the same automated matching system that has generated notices for traditional securities for decades. That mechanism produces notices automatically and at scale whenever a filed return does not align with broker-reported data. Combined with the historical exchange data the IRS already obtained through John Doe summonses, this means the volume of crypto letters is expected to rise substantially in the coming years.