Quick answer: An installment sale is a sale in which the seller is paid over more than one tax year. Under the installment method the seller reports gain as payments arrive instead of all at closing. The IRS describes Form 6252 as the form for reporting income from an installment sale this way and points to Publication 537 for the rules.[1] In a business sale the later payments usually come from a seller note, so deferring tax also means lending to the buyer and taking its credit risk.
Key points
- The installment method moves the reporting of gain to the years in which payments arrive, so tax payments follow the cash the seller has actually received.
- Deferral applies unevenly inside a business sale. Inventory and depreciation recapture are generally taxed in the year of sale, so the price allocation decides how much gain can be spread.
- A seller note creates the installments and makes the seller a lender to the buyer. Security, ranking behind bank debt and covenants decide whether the deferred payments are collected.
- Collecting the note early, selling it or having it accelerated can pull the deferred gain into one year, so the note’s terms and the tax plan should be set together.
How the installment method spreads a gain
An owner who is paid over more than one tax year can generally report gain as payments are received, instead of reporting all of it in the year of sale. The IRS describes Form 6252 as the form for reporting income from an installment sale using the installment method, and it points to Publication 537 for the rules.[1] Each principal payment is split in two. One part returns the owner’s basis and is not taxed. The other part is gain, and its share of each payment equals the share of the total price that is gain, a ratio called the gross profit percentage. Interest on the note is separate and is taxed as interest when received.
Illustrative example: Gain by year when part of the price is paid on a note
An owner sells shares for $10,000,000. The owner’s basis is $2,000,000, so the gain is $8,000,000 and the gross profit percentage is 80 percent. The buyer pays $4,000,000 at closing and then $2,000,000 of principal in each of the next three years.
| Year | Principal received | Gain reported (80 percent) | Basis recovered (20 percent) |
|---|---|---|---|
| Sale year | $4,000,000 | $3,200,000 | $800,000 |
| Year 1 | $2,000,000 | $1,600,000 | $400,000 |
| Year 2 | $2,000,000 | $1,600,000 | $400,000 |
| Year 3 | $2,000,000 | $1,600,000 | $400,000 |
| Total | $10,000,000 | $8,000,000 | $2,000,000 |
A cash sale would report all $8,000,000 in the sale year. The example leaves out interest, selling costs, debt, recapture and tax rates. The amounts are invented to show the mechanics and are not benchmarks.
The deferral changes timing and leaves the total gain alone. Whether it lowers the total tax depends on the owner’s other income in each year, because the IRS says the long-term capital gain rates of 0%, 15% and 20% depend on taxable income.[2] A gain stacked on the owner’s other income in the sale year can reach a higher rate than slices reported later, but the income and rules of those later years are not known at signing. The federal tax guide explains the layers that apply to a sale.
Which parts of a business sale can be deferred
A business sale is not one item for this purpose. In an asset sale the price is allocated among the assets and the analysis runs asset by asset, while in a stock sale it runs on the shares. The allocation therefore decides how much of the gain can be spread, and the guide to purchase price allocation explains how it is set. The table shows the general pattern that Publication 537 and the owner’s CPA apply to the specific facts.
| Part of the price | Can later payments defer the tax? | Planning point |
|---|---|---|
| Goodwill and other capital assets in an asset sale | Generally yes | The largest deferral usually sits here, so the allocation matters |
| Shares or membership interests | Often yes for the gain on the interest itself | The CPA checks what, if anything, in a pass-through entity is carved out |
| Equipment gain that reverses earlier depreciation | Generally no, it is recognized in the year of sale | A buyer’s request to assign more of the price to equipment can add up-front tax even if the buyer pays later |
| Inventory | Generally no | Gain on inventory is taxed in the sale year whatever the payment schedule |
| Receivables | Depends on the seller’s accounting method | Cash-basis and accrual-basis sellers are treated differently |
An owner can generally choose not to use the method and report the whole gain in the sale year, for example when the owner has losses available to absorb it. The CPA makes that choice with the sale-year return in view. The comparison of asset and stock sales shows how structure changes which parts of the price are in play.
Where the seller note comes in
In a business sale the installments usually come from a seller note. The buyer pays part of the price in cash at closing and signs a promissory note for the rest, often because bank debt covers only part of the price, as the guide to financing an acquisition explains from the buyer’s side. The tax deferral is therefore a by-product of lending to the buyer, and the note’s terms drive both the tax result and the risk. The guide to rollover equity and seller notes lists the terms of the note itself. Two points connect the note to the tax.
- Early payment. Collecting the note early, having it accelerated on a sale of the buyer’s company, or selling or pledging it to a third party can bring deferred gain into one year.
- Contingent payments. An earnout paid in later years can also be reported as payments arrive, but basis is spread differently than for a fixed note, so the CPA models both. The earnout guide covers the commercial side.
What the seller gives up in return for deferral
Deferral is a trade, and the reward is real only to the extent the note is paid.
| Feature | What the seller gains | What the seller risks |
|---|---|---|
| Tax timing | Tax on gain follows the cash received | Later-year income and rules are unknown at signing |
| Price | A buyer that can finance more of the price with a note may offer a higher headline price | The extra price is paid only if the buyer’s business can fund it |
| Interest | The note earns a return while it is outstanding | Interest is taxed as received, and a low stated rate can be recharacterized, so the CPA checks it |
| Security | A lien on assets or a pledge of the shares can back the note | Bank lenders often rank ahead, and collateral can be worth less in a downturn |
Protecting the note
A seller note is a loan to a company that has just been bought with borrowed money, and its protections should be read with that in mind.
- Security and ranking. A lien on the business assets or a pledge of the shares sold, plus an agreement with the buyer’s bank that says when payments to the seller may be suspended and for how long.
- Guarantee. A commitment from the buyer’s parent company or owners to pay if the buyer does not, which matters because the buyer is often a newly formed acquisition vehicle with no operating history.
- Covenants. Limits on dividends and fees paid to the buyer’s owners while the note is outstanding, regular financial reporting to the seller and insurance on the collateral.
- Acceleration. The note falls due on a sale of the company, a change of control or a default.
- A default plan. What the seller can do if payments stop, and whether retaking collateral or the business is a realistic remedy. A seller that retakes a business after a default gets back a company in whatever condition the default left it.
Planning questions for the owner’s CPA
- Which parts of the price qualify for installment reporting for this entity and this allocation, and what is taxed in the sale year regardless?
- Should the owner use the method or report the whole gain in the sale year, given other income and losses?
- What happens to the tax if the buyer prepays, the note is sold or pledged, or the buyer defaults?
- Does the stated interest rate satisfy the tax rules for deferred payments?
- How does each year’s slice of gain interact with the net investment income tax, which the IRS says applies to individuals whose income is above thresholds that depend on filing status?[3]
- What cash and note split, interest rate, security and ranking terms should the letter of intent state?
The structure is largely fixed once a letter of intent is signed, so the tax work comes before it. The guide to pre-sale tax and entity planning lists the entity questions, and the guide to reading a letter of intent shows where the split between cash and note first appears. The guide to how to sell a business places this decision among the stages of a sale. This guide is general education and not tax advice.
Frequently asked questions
What is the installment method?
It is a way of reporting gain from a sale in which the seller is paid over more than one tax year. The seller reports the gain as payments are received instead of all at once. The IRS describes Form 6252 as the form for reporting income from an installment sale using this method and points to Publication 537 for the rules.[1]
Does an installment sale reduce the tax on a business sale?
It changes when gain is reported, not how much gain there is. Whether total tax falls depends on the owner’s income and the rules in the years the payments arrive, which are unknown at signing. Some items, such as depreciation recapture, are generally taxed in the year of sale whatever the payment schedule.
Can every part of a business sale use the installment method?
No. Inventory is generally excluded, depreciation recapture is generally recognized in the year of sale, and the allocation of the price decides how much of the gain is eligible. The owner’s CPA applies the rules in Publication 537, which the IRS points to, to the specific assets.[1]
What happens if the buyer stops paying the seller note?
The seller’s remedies depend on the note: whether it is secured, how it ranks behind the buyer’s bank debt, and what default rights it gives. A seller with a lien can look to the collateral, while one without security is an unsecured creditor. The tax result of a default is a question for the CPA.
How much of the price should the seller finance?
There is no standard share. The more of the price sits in a note, the more of the owner’s proceeds depend on the buyer’s credit. Owners weigh the extra price a buyer may pay for flexibility, the security offered and the cash they need at closing, then test the answer with a CPA and an attorney.
Thinking about a sale or an acquisition?
The Impetus Group provides sell-side and buy-side M&A advisory, from preparation and buyer outreach to negotiation and closing. A transactional valuation is often the first step, scoped and priced separately.
Related guides
- Rollover Equity and Seller Notes: Deferred Consideration Explained: Rollover equity and seller notes defer part of a sale price. Learn how each works, how their risks differ and what to ask before accepting either.
- Federal Taxes When You Sell a Business: Capital Gain, Ordinary Income and Recapture: Federal tax on a business sale comes in layers: capital gain, depreciation recapture, ordinary income and the net investment income tax. See how they stack.
- Asset Sale vs. Stock Sale: How Structure Changes Your Proceeds: In an asset sale the buyer picks the assets and liabilities it takes. In a stock sale it buys the owner’s shares. See how each affects taxes, risk and proceeds.
- Purchase Price Allocation in an Asset Sale: The Seven Asset Classes and Form 8594: How the price of an asset sale is divided among the seven IRS asset classes, why buyer and seller want different splits, and how to negotiate the Form 8594 schedule.
- Financing a Business Acquisition: Equity, Bank Debt, Seller Notes and SBA Loans: How buyers fund an acquisition: equity, senior debt, SBA-guaranteed loans, seller notes, mezzanine and rollover equity, with a sources and uses example.
- How Long Does It Take to Sell a Business? Phase by Phase: How long a business sale takes depends on its slowest phase. See what controls each stage, where delays occur and what shortens the path.
Sources
- About Form 6252, Installment Sale Income. Internal Revenue Service. Accessed October 13, 2026.
- Topic no. 409, Capital gains and losses. Internal Revenue Service. Accessed October 13, 2026.
- Net Investment Income Tax. Internal Revenue Service. Accessed October 13, 2026.
This guide is general education. It is not a valuation opinion, appraisal, investment advice, or legal or tax advice. How these guides are made.