Deferred Consideration: GAAP Treatment, Installment Method, and Earnouts

Deferred consideration in a business sale runs on two separate tracks. The accounting and tax treatment of deferred consideration diverge from day one: GAAP requires the buyer and seller to estimate the fair value of every future payment on the closing date and book it immediately, while the tax code generally lets the seller wait to recognize gain until cash actually arrives. Confusing the two is where most mistakes happen, and the fallout ranges from misstated financials to IRS accuracy-related penalties of 20% or 40% of the underpayment.

The Three Payment Structures That Drive Everything

How a deferred payment is structured determines almost every downstream question. Three arrangements cover most M&A deals.

A fixed deferred payment is a set dollar amount due on a scheduled date. Performance of the acquired business is irrelevant. This is essentially buyer-to-seller debt and is treated that way.

An earnout, or contingent consideration, ties part of the price to future results: revenue thresholds, EBITDA targets, customer retention, regulatory milestones. Earnouts bridge valuation gaps between buyers and sellers, but they carry the most complex accounting and tax treatment of any deal structure.

A holdback or escrow parks part of the price with a third party after closing, protecting the buyer against undisclosed liabilities or breaches of the seller’s representations. Escrow periods commonly run 12 to 24 months, holding back 5% to 15% of deal value. Funds release to the seller if no valid claims arise.

How the Buyer Records Deferred Consideration Under GAAP

ASC 805 (Business Combinations) requires the acquirer to account for the entire purchase price on the acquisition date, contingent payments included, even ones that may never actually be paid. This day-one measurement is the defining feature of acquisition accounting.

Initial Measurement and Classification

On the acquisition date, the buyer estimates the fair value of every contingent payment obligation and rolls that amount into total consideration transferred. Total consideration then drives goodwill: goodwill equals consideration transferred (plus any noncontrolling interest) minus net identifiable assets acquired. A higher fair value estimate for the earnout produces more goodwill on the balance sheet.

The buyer must classify the earnout as either a liability or equity before it hits the books. The test looks at how the payment will settle. Cash settlement or settlement in a variable number of shares almost always produces a liability. Only arrangements settled with a fixed number of the buyer’s own shares may qualify for equity treatment. The classification controls everything that follows.

Subsequent Measurement

A liability-classified earnout gets remeasured to fair value at every reporting date until the contingency resolves, and each adjustment runs through the income statement. If the acquired business beats targets, the liability grows and earnings take the hit. If it underperforms, the liability shrinks and the acquirer books a gain. A single earnout can swing quarterly earnings for reasons unrelated to core operations, which is the most common complaint about earnout accounting.

An equity-classified earnout is never remeasured. The amount recorded on closing day stays fixed in equity, and settlement differences are absorbed within equity without touching earnings. That is why acquirers prefer equity classification whenever the structure allows it.

Fixed Deferred Payments

Because the amount and timing are known, the buyer records a payable at present value on the acquisition date using an appropriate discount rate. The gap between the discounted amount and face value accretes as interest expense across the deferral period, the same way any other time-value adjustment works on a debt instrument.

How the Seller Records Deferred Consideration Under GAAP

The seller’s accounting focuses on measuring the gain or loss from the sale. Total consideration on closing day includes both the cash received and the fair value of any earnout rights, and that fair value goes into the gain calculation even though no cash has arrived.

After the initial gain, the seller holds a contingent asset: the right to future earnout payments. Changes in the fair value of that right generally run through the income statement in later periods. Outperformance produces additional income; underperformance produces a loss.

One boundary matters here. If a seller’s revenue in a contract with a customer depends on a variable amount, ASC 606 (Revenue from Contracts with Customers) applies instead of the business-combinations framework. Under ASC 606, the seller estimates variable consideration and includes it in the transaction price only to the extent that a significant reversal of previously recognized revenue is unlikely. That constraint keeps sellers from booking aggressive estimates they might have to reverse later.

For holdbacks and escrows, the seller recognizes the full sale price at closing, including the escrowed amount. At the same time, the seller records a reserve for potential indemnification claims. Sizing that reserve requires judgment about the representations in the purchase agreement and any known issues that could trigger a claim.

How the Seller Is Taxed on Deferred Payments

Tax treatment diverges sharply from the accounting picture. Where GAAP forces fair value recognition on closing day, the tax code generally spreads gain across the years the seller actually collects.

The Installment Method

The default method for any property sale with at least one payment received after the tax year of the sale is the installment method under IRC Section 453. It applies automatically. You don’t elect in; you elect out.¹

Under the installment method, the seller recognizes gain proportionally as payments arrive. The IRS uses a gross profit ratio (gross profit divided by total contract price), applies it to each payment, and treats the resulting amount as the taxable gain for that year. The rest of the payment is a return of basis. For a large transaction, spreading the liability across years is a meaningful cash-flow benefit.²

Sales That Can’t Use the Installment Method

Several categories are excluded outright:

Dealer dispositions: if you regularly sell the same type of property on installment plans, or hold real property for sale to customers in the ordinary course of business, Section 453 doesn’t apply.
Inventory: personal property that would be in your year-end inventory can’t use installment reporting.
Publicly traded securities: sales of stock or securities traded on an established market are taxed as if all payments were received in the year of sale.
Revolving credit plans: dispositions of personal property under revolving credit arrangements are excluded.

If the transaction falls in any of these buckets, the entire gain is recognized in the year of sale regardless of payment timing.¹

Depreciation Recapture Hits Year One

Even when installment treatment applies, one piece of the gain doesn’t get deferred. Any depreciation recapture under Sections 1245 or 1250 must be recognized as ordinary income in the year of the sale, regardless of how much cash has been received. Only the gain above the recapture amount spreads across future payments. Sellers with heavily depreciated equipment or real property are often caught off guard: a large ordinary income hit lands in year one, sometimes larger than the first installment payment itself.¹

Electing Out

A seller can elect out by reporting the entire gain on the return for the year of sale. Electing out creates a closed transaction, which means the fair market value of any contingent payment right must be determined and the full gain recognized immediately. This can make sense when the seller expects tax rates to rise or wants a clean break from the deal’s future tax reporting.

An open transaction, where the seller recovers basis first and defers all gain until basis is fully recovered, is available only when the contingent payment right genuinely has no ascertainable fair market value. Courts and the IRS treat this as a rare exception, not a planning option, because modern valuation techniques can put a number on almost any payment stream.

How the Buyer Is Taxed on Deferred Payments

The buyer’s central concern is basis, because basis drives future depreciation and amortization deductions. The timing rules don’t match GAAP.

For contingent payments treated as additional purchase price, the buyer gets no tax basis until the payment is fixed and actually paid. This creates a lasting timing mismatch. Financial statements carry goodwill or other intangibles at one basis reflecting the day-one fair value of the earnout liability, while the tax return carries a lower basis until earnout payments actually go out the door. When a contingent payment is made, the buyer adds that amount to the basis of the acquired assets.

In an asset acquisition, purchase price (including contingent amounts) must be allocated among the assets using the residual method under Section 1060. Buyer and seller are required to use the same allocation. A written allocation in the purchase agreement binds both parties for tax purposes.³

Buyers sometimes prefer to characterize earnout payments as compensation for the seller’s post-closing services rather than additional purchase price. Compensation produces an immediate deduction, dollar for dollar against taxable income, instead of capitalized basis recovered slowly through depreciation or amortization. The trade-off falls on the seller: ordinary income rates and payroll taxes instead of capital gain. This tension is often a negotiation point rather than a settled answer.

Imputed Interest and the Applicable Federal Rate

When a deferred payment arrangement charges too little interest, the IRS recharacterizes part of the principal as interest. That shifts income from capital gains rates to ordinary income rates for the seller and creates an interest deduction for the buyer.

Two provisions govern this. Section 483 applies to contracts for the sale of property where some payments are due more than six months after the sale and the contract charges no interest, or less than the applicable federal rate (AFR).⁴ Section 1274 applies to debt instruments issued for property, testing whether the instrument carries adequate stated interest against the AFR. If not, the shortfall is imputed as original issue discount.⁵

The AFR that applies depends on term. Three years or less uses the short-term AFR. Three to nine years uses the mid-term rate. Over nine years uses the long-term rate. The IRS publishes rates monthly. For March 2026, the annual-compounding rates are 3.59% (short-term), 3.93% (mid-term), and 4.72% (long-term).⁶ Any deferred payment contract should specify an interest rate at or above the applicable AFR to avoid imputed interest.

When an Earnout Becomes Compensation

Whether an earnout is additional purchase price or disguised compensation for post-closing services is one of the highest-stakes characterization issues in M&A. The classification changes the effective tax rate on the payment by 15 percentage points or more. The IRS scrutinizes arrangements where selling shareholders stay on as employees after closing.

Several factors drive the analysis:

Employment conditions. If the earnout pays only when the seller continues working for the company, that strongly suggests compensation.
Proportionality. If all shareholders receive earnout payments in proportion to ownership, even when only some provide services, the payments look more like deferred purchase price.
Negotiation history. If the earnout arose because the parties couldn’t agree on valuation and was proposed as a compromise, that supports purchase price treatment.
Reasonable compensation. If selling shareholders already receive market-rate salaries for their post-closing roles, additional earnout payments look more like purchase price. Below-market salaries push the IRS toward viewing the earnout as making up the difference.
Relationship to business value. Payments reflecting a reasonable valuation of the business favor purchase price treatment; payments tied to individual performance metrics look more like compensation.

No single factor controls, and labeling the payment “additional purchase price” in the agreement does not settle the question. The IRS and courts look at the full picture. Documenting the business rationale for the earnout at the time of the deal is the practical defense.

The Section 453A Interest Charge on Large Installment Sales

Section 453A adds a cost for sellers who use the installment method on large deals. If the sales price exceeds $150,000 and the total face amount of installment obligations outstanding at year-end exceeds $5 million, the seller owes an interest charge on the deferred tax liability.⁷

The charge applies only to the portion of outstanding obligations above the $5 million threshold. It is calculated by multiplying the deferred tax liability on that excess by the IRS underpayment rate for the month the tax year ends, and it applies every year the obligation remains outstanding. Personal-use property and farm property are exempt.⁷

Section 453A also treats pledging an installment obligation as a payment. Using the note as loan collateral triggers immediate gain recognition on the pledged amount. Sellers who plan to borrow against installment notes need to model this or lose the deferral they structured the deal to get.

IRS Forms You Have to File

Deferred consideration creates filing obligations that continue well past the year of the sale.

Form 6252

Any seller reporting under the installment method files Form 6252 (Installment Sale Income) with their return, not only in the year of sale but in every subsequent year a payment is received. It attaches to Form 1040 for individuals, Form 1065 for partnerships, Form 1120 for C corporations, or Form 1120-S for S corporations.⁸

Form 8594 and Its Supplemental Filings

When a sale involves a group of assets that constitutes a trade or business, both buyer and seller file Form 8594 (Asset Acquisition Statement) with their returns for the year of sale. The form requires an allocation of total purchase price among seven asset classes using the Section 1060 residual method.⁹

Contingent consideration adds a recurring obligation. Whenever an earnout payment is made in a later year, both parties must file a supplemental Form 8594 for that year, reallocating the increased purchase price across the asset classes. Missing this step produces inconsistent reporting between buyer and seller, which is exactly the kind of mismatch that draws IRS attention.⁹

Valuing Contingent Consideration for the Books

The fair value both sides record on the acquisition date isn’t pulled from the purchase agreement. It’s a modeled estimate. Professional valuation fees for ASC 805 compliance range from a few thousand dollars for simple structures to six figures for multi-metric earnouts on large deals.

Probability-Weighted Expected Outcome Method

The probability-weighted expected outcome method is the most common approach for straightforward earnouts. You map every realistic payment scenario, from zero to the maximum, assign each a probability from forecasts and market data, multiply payment by probability, sum the results, and discount to present value. The output is only as good as the forecasts feeding it. Optimistic projections inflate fair value and, for buyers, the resulting goodwill on the balance sheet.

Option Pricing Models

When an earnout has multiple triggers, nonlinear payoffs, or ties to a volatile metric, option pricing models and Monte Carlo simulations may fit better. These treat the earnout like a derivative, simulating thousands of outcomes. They are especially useful when the payoff resembles an option, such as an earnout that pays nothing below a revenue threshold and scales rapidly above it.

Discount Rates

Whatever the method, the discount rate has to reflect the risk that the buyer won’t actually make the payment. For earnouts tied to financial metrics like revenue or EBITDA, the rate typically starts with the risk of the underlying metric and adds a credit-risk adjustment for the buyer. For earnouts tied to nonfinancial milestones like regulatory approval or product launch, the starting point is closer to a risk-free rate with a credit-risk adjustment on top, because the risk is concentrated in whether the milestone happens rather than in volatility.

Accuracy-Related Penalties for Getting the Value Wrong

Bad valuations have tax consequences beyond misstated financial statements. Section 6662 imposes accuracy-related penalties when a tax underpayment results from a valuation misstatement. A substantial valuation misstatement, generally where reported value is 150% or more of the correct value (or 200% or more for property), triggers a penalty of 20% of the resulting underpayment.¹⁰

A gross valuation misstatement doubles the penalty to 40%. Thresholds for gross misstatement are higher, generally 200% of the correct value under the overstatement tests. These penalties apply to both sides, covering everything from overvalued earnout liabilities that inflate buyer basis to undervalued contingent payment rights that reduce seller gain. Thorough documentation of the valuation methodology, assumptions, and source data is the strongest defense when the IRS challenges the numbers.¹⁰

1
Office of the Law Revision Counsel. 26 U.S. Code 453 – Installment Method
2
eCFR. 26 CFR 15a.453-1 – Installment Method Reporting for Sales of Real Property and Casual Sales of Personal Property
3
Office of the Law Revision Counsel. 26 USC 1060 – Special Allocation Rules for Certain Asset Acquisitions
4
Office of the Law Revision Counsel. 26 U.S. Code 483 – Interest on Certain Deferred Payments
5
Office of the Law Revision Counsel. 26 USC 1274 – Determination of Issue Price in the Case of Certain Debt Instruments Issued for Property
6
Internal Revenue Service. Revenue Ruling 2026-6 – Applicable Federal Rates for March 2026
7
Office of the Law Revision Counsel. 26 U.S. Code 453A – Special Rules for Nondealers
8
Internal Revenue Service. About Form 6252, Installment Sale Income
9
Internal Revenue Service. Instructions for Form 8594
10
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments