Accounting for Prediction Market Maker Rebates, Liquidity Incentives and Platform Payments

Last Updated on August 29, 2026 by Patrick Camuso, CPA

Quick answer (read this first)

Professional prediction-market market makers can earn several forms of compensation in addition to the gains and losses generated by their contract positions. Depending on the venue and arrangement, these amounts can include maker rebates tied to executed orders, liquidity rewards tied to resting quotes, volume-based incentives, fee benefits, and compensation under formal market-maker agreements.

For accounting purposes, the first question is how the payment was earned. A rebate calculated from executed maker fills has a different factual basis from a reward earned for maintaining qualifying liquidity over a measurement period. A payment under a market-maker agreement may depend on quoting, volume, spread, or other contractual requirements.

Those distinctions should remain visible in the accounting records. Once the underlying arrangement is understood, the firm can determine the appropriate recognition and presentation under its applicable basis of accounting.

This article addresses that accounting problem. It does not prescribe one accounting treatment for every prediction-market incentive program. Federal income-tax treatment is also a separate analysis, which Camuso CPA addresses in Tax Treatment of Prediction Market-Maker Rebates, Liquidity Incentives & Platform Payments.

The Accounting Starts With the Arrangement

Current prediction-market programs show why the underlying arrangement matters more than the label attached to the payment. Gemini Predictions operates both a Maker Rebate Program and a separate Liquidity Rewards Program. Maker rebates are calculated from completed maker fills and paid daily in USD. Liquidity Rewards are based on qualifying resting liquidity, with factors that include quote uptime, spread, and size. The programs compensate different activity even though both reward liquidity provision. Kalshi separates its programs differently. Its public Liquidity Incentive Program rewards qualifying resting orders based on their contribution to the order book, including orders that never fill. Its Volume Incentive Program rewards eligible trading volume. Both currently exclude market makers operating under existing agreements. Kalshi separately maintains a Liquidity Provider Program under which members that have executed a Market Maker Agreement can become Designated Liquidity Providers for specified series and incentive periods. Polymarket similarly maintains separate Maker Rebates and Liquidity Rewards programs. Its current Maker Rebates Program pays daily pUSD rebates based on maker liquidity that actually executes and is funded from taker fees in eligible markets. Its Liquidity Rewards program compensates posted liquidity under a separate order-book scoring methodology.

For a professional trading firm, the accounting begins with the program or agreement that generated the payment, the activity required to earn it, the calculation method, and the payment terms.

Fill-Linked Rebates and Quoting Incentives Present Different Accounting Facts

A fill-linked maker rebate can be connected directly to executed trading activity. Gemini calculates its rebate from completed maker fills using the applicable fee formula. Polymarket allocates maker rebates according to a market maker’s share of executed maker liquidity in an eligible market. Gemini’s Liquidity Rewards program evaluates qualifying quotes based on measures such as uptime, spread, and size. Kalshi’s public liquidity program scores qualifying resting orders through recurring order-book snapshots. Polymarket also rewards posted liquidity under its own methodology.

The accounting conclusion should be based on the economics and terms of the arrangement.

For a material execution-linked rebate, the relationship among the executed trade, transaction fees, and the resulting rebate may be relevant to presentation. A liquidity reward earned over a measurement period may raise different cutoff or recognition questions. A payment arising under a formal market-maker agreement may depend on still another set of conditions.

The accounting records should preserve those facts before they are summarized into the general ledger.

Formal Market-Maker Agreements Require Separate Review

A firm operating under a formal market-maker agreement may have rights and obligations that are materially different from those of a participant in a generally available incentive program.

Kalshi’s current market-maker program describes designated market makers that agree to provide consistent two-sided liquidity and satisfy quoting and volume requirements. Potential benefits can include reduced fees and adjusted position limits. Under its separate Liquidity Provider Program, a member operating under a Market Maker Agreement may qualify for an Incentive Period Reward after satisfying the requirements for an identified series and period.

For accounting purposes, the agreement itself is part of the evidence.

A payment may relate to performance over a defined period rather than to an individual execution. Some conditions may remain outstanding at month-end. The final payment may not be known until the platform completes its calculation.

The appropriate accounting follows from those terms and from the reporting basis used by the entity. For material arrangements, the relevant agreement and supporting payment records should be retained with the accounting workpapers.

Management P&L Is Not the Accounting Record

A market maker may reasonably evaluate its strategies on a net economic basis. An internal trading report might combine contract P&L, transaction fees, maker rebates, liquidity rewards, and other payments to measure the profitability of a strategy or venue. That can be perfectly useful for managing the business. The accounting records have a different job.

If management reports $4 million of net trading economics for a period, the accounting process should still be capable of identifying material contract results, transaction costs, maker rebates, liquidity rewards, and other payment streams that make up that number. This does not require the general ledger to contain every fill. A high-volume trading firm will often maintain substantially more detail below the GL and post summarized accounting entries from that supporting record.

Camuso CPA’s broader Prediction Market Accounting Guide addresses the relationship among source records, transaction-level accounting, the general ledger, financial reporting, and tax records. The narrower requirement here is that a material rebate or incentive recorded in the books remain traceable to the arrangement and source records that support it.

Period-End Cutoff Depends on the Program Terms

The timing of these payments varies. Gemini currently pays Maker Rebates daily at 5:00 p.m. ET and provides daily Liquidity Rewards payout information through its rewards system. Polymarket distributes eligible Maker Rebates daily in pUSD. Kalshi’s public incentive programs can run over defined periods, with final scoring and payment occurring after the applicable period has ended. Kalshi expressly distinguishes paid rewards from estimates shown while a program remains active.

For an accrual-basis entity, cash receipt is therefore not necessarily the only relevant date. At month-end, one reward may already have been paid. Another incentive period may have ended but remain subject to final processing. A third may still be open, with only an estimated amount visible on the platform. The accounting analysis depends on the program terms, the rights and obligations existing at the reporting date, whether applicable conditions have been satisfied, and whether the amount can be measured appropriately under the entity’s accounting policy.

For a professional market maker with material incentive activity, that analysis belongs in the normal close process.

Maker Rebates Can Raise a Gross-or-Net Presentation Question

Maker rebates frequently have a direct economic relationship to transaction fees. Gemini calculates its maker rebate by reference to the fee economics associated with completed maker fills. Polymarket funds its maker-rebate pools from taker fees in eligible markets and distributes rebates according to executed maker liquidity. That relationship is relevant when determining presentation, but the program mechanics do not establish one accounting answer for every entity.

Depending on the applicable reporting framework and the substance of the arrangement, a firm may need to determine whether a material rebate is presented separately or in relation to an associated trading cost. The same analysis should be applied carefully to liquidity incentives. A separately credited reward does not establish its accounting classification simply because it appears as a distinct line item on a venue statement.

The accounting policy should reflect the arrangement.

Payment in pUSD Adds a Second Accounting Question

Polymarket currently pays eligible maker rebates in pUSD directly to the participant’s wallet.

That creates two related accounting issues including its recognition and presentation under the applicable accounting policy and the asset received and the records necessary to account for that asset after receipt. The payment medium does not change the economic arrangement that generated the rebate, while the subsequent accounting for the asset does not follow solely from the fact that it entered the wallet through a rebate program.

For firms operating across cash and on-chain environments, both pieces of information need to survive into the accounting records.

The broader mechanics of consolidating different venue environments are addressed in Cross-Venue Prediction Market Accounting.

Keep the Program Terms That Applied During the Period

Incentive programs change. Gemini states that rebate rates, eligible categories, and program terms may change. Kalshi can modify or terminate its public incentive programs and identifies its regulatory notices as the governing source for program terms. Polymarket states that the percentage of taker fees allocated to maker rebates may change over time. For a material recurring program, the accounting support should identify the terms that applied during the period being accounted for.

The documentation required will depend on materiality and the reporting requirements of the firm. For a material arrangement, that may mean retaining the applicable program terms or market-maker agreement together with the source report and payment record used in the reconciliation.

The Close Should Explain the Recorded Amount

At period end, a material rebate or incentive balance should be explainable from the source records. If an amount is recognized before payment, the subsequent payment should reconcile to the recorded balance or produce an identifiable difference. If the platform’s final calculation differs from an amount recognized at period end, that difference should be visible in the close process.

At small scale this can be straightforward. At market-maker scale, several recurring programs can operate alongside very large execution populations, and small unexplained differences can accumulate quickly. The exact implementation depends on the firm’s transaction volume, materiality, venue mix, reporting basis, and existing systems.

Accounting and Federal Tax Treatment Are Separate Analyses

The accounting conclusion does not determine the federal income-tax treatment of a maker rebate, liquidity reward, or contractual market-maker payment. The federal tax result depends on the arrangement and applicable tax authorities. Camuso CPA addresses those questions separately in Tax Treatment of Prediction Market-Maker Rebates, Liquidity Incentives & Platform Payments.

The role of the accounting work is to establish a reliable factual record. By year end, a professional firm should be able to identify its material payment streams, explain how each was earned and recorded, and produce the source documentation supporting the amounts in the books. The tax analysis can then begin from that record. Any differences between book and tax treatment can be addressed in the book-to-tax workpapers rather than reconstructed from an aggregate platform P&L.

Why This Matters at Market-Maker Scale

A quantitative market maker can generate millions of fills while several fee and incentive arrangements operate during the same reporting period. The firm may trade across multiple venues, maintain material open positions, and operate through a partnership or corporate entity with recurring accounting and tax requirements.

Camuso CPA’s prediction-market accounting work includes quantitative market-making firms operating at millions-of-fills scale, including engagements involving historical reconstruction, transaction-level subledger accounting, period-end reporting, and ongoing accounting. At that scale, a weak classification or reconciliation policy can repeat across an entire year. Individually small credits can become material in the aggregate.

The accounting needs to be addressed as part of the recurring books and close, not as an adjustment made after the trading year has already been compressed into a net number.

Conclusion

Maker rebates, liquidity rewards, volume incentives, fee benefits, and payments under formal market-maker agreements can all contribute to the economics of a professional prediction-market trading business.

The accounting should preserve the distinctions that matter, retain the relevant program or contractual support, apply the entity’s accounting policies, and reconcile material recorded amounts to the underlying source records and settlement activity. The general ledger does not need to become a trading database. It does need to be supported by records that explain the amounts posted to it. Tax treatment is a separate analysis.

For professional market makers, resolving these questions through the recurring close generally produces a better record than trying to reconstruct several payment programs after year end.

How Camuso CPA Helps

Camuso CPA provides prediction-market accounting and tax services for market makers, proprietary trading firms, funds, and other professional trading operations.

Our accounting work includes transaction reconstruction, venue and cash reconciliation, prediction-market subledger accounting, general-ledger integration, period-end close, financial reporting support, and book-to-tax workpapers. Camuso CPA’s work with professional prediction-market firms includes quantitative market-making activity at millions-of-fills scale and ongoing accounting relationships.

Where maker rebates, liquidity incentives, or other platform payments are material, the accounting process can be developed around the programs and agreements actually used by the firm while preserving the records required for financial reporting and the separate federal tax analysis.

Learn more about Prediction Market Accounting for trading firms and market makers.

Frequently Asked Questions

How should prediction-market maker rebates be accounted for?

The accounting depends on the arrangement producing the rebate and the accounting framework used by the entity. For a material fill-linked rebate, the relevant program terms and source records should be retained so the firm can determine and support the appropriate recognition and presentation.

Are liquidity rewards the same as maker rebates?

The programs can have different economics. Gemini and Polymarket currently tie maker rebates to executed maker liquidity, while their liquidity programs compensate qualifying posted liquidity under separate methodologies. Kalshi separately distinguishes its public liquidity and volume programs from arrangements for market makers operating under Market Maker Agreements.

Should maker rebates reduce trading fees in the books?

That is a presentation question under the accounting framework applicable to the entity. The economic relationship between the rebate and transaction fees can be relevant, but the venue’s use of the term “rebate” does not establish the accounting presentation by itself.

How should an incentive be handled when the incentive period ends before payment arrives?

The analysis depends on the entity’s reporting basis, the governing program terms, the conditions satisfied at the reporting date, and whether the amount can be measured appropriately. For an accrual-basis entity, the payment date may not be the only relevant date.

How should a market maker account for a rebate paid in pUSD?

The accounting should preserve both the nature of the rebate and the asset received. Recognition and presentation of the rebate and the subsequent accounting for pUSD are related but separate accounting questions. Polymarket currently pays eligible Maker Rebates in pUSD.

Do the accounting and federal tax treatment have to match?

No. Financial accounting and federal income tax are separate systems. The books should preserve the factual record required for both analyses, with applicable differences addressed through the entity’s book-to-tax workpapers.