Under installment sale business tax rules, you report gain as the buyer pays you. Depreciation recapture and inventory are still taxed in the year of sale.
When a buyer can't fund the full price at closing, the rest often comes as a note paid over several years, and that note changes when you owe tax. Whether you're signing an asset sale or a stock sale comes first, and our pre-exit tax checklist for selling a business covers that choice.
How does an installment sale spread the tax?
When at least one payment arrives after the year of sale, section 453 of the Internal Revenue Code has you report the gain under the installment method. It's the default, and leaving it takes an election, covered below.
Each dollar of principal you collect splits into a return of your basis, which isn't taxed, and gain, which is. For a fixed price that never changes, the split generally stays the same for the life of the note; a later price reduction means refiguring it.
- Gross profit
- The selling price minus your installment sale basis, which is your adjusted basis plus selling expenses plus any depreciation recapture taxed in the year of sale. This is the gain you'll report on the installment method.
- Contract price
- The selling price minus debts the buyer takes over that came from owning the property or running the business, plus any amount by which those debts exceed your installment sale basis. That excess counts as a payment in the year of sale. Other debts the buyer takes over, such as a personal loan or your legal fees for the sale, count in full as a payment in the year of sale.
- Gross profit percentage
- Gross profit divided by contract price. That share of every principal payment is taxable gain.
A simplified illustration (hypothetical)
Say you sell all the stock of your company, which isn't publicly traded, for $2,000,000. Your basis is $400,000 and there are no selling costs. Your gain is $1,600,000, so your gross profit percentage is 80%. The buyer pays $500,000 at closing and gives you a $1,500,000 note, paid in five annual principal payments of $300,000 plus interest.
| Year | Principal received | Gain reported (80%) |
|---|---|---|
| Year of sale | $500,000 | $400,000 |
| Each of the next five years | $300,000 | $240,000 |
| Total | $2,000,000 | $1,600,000 |
Interest on the note is ordinary income. For a cash-method seller with adequate stated interest, that's generally the year it's paid; if the note carries unstated interest or original issue discount, some can be taxable before you receive it. The example leaves out recapture, state tax and other income, and shows no tax result for any real seller.
The installment method doesn't shrink your gain. It changes the years in which you report it.
What can't use the installment method when you sell a business?
In an asset sale, the IRS treats one price for a whole business as a sale of each asset, and you and the buyer allocate the price across them on Form 8594. Not every piece qualifies.
| What you're selling | How the gain is taxed | Rule |
|---|---|---|
| Inventory | All in the year of sale, as ordinary income, even if you're paid later | 26 U.S.C. 453(b)(2)(B) |
| Depreciation recapture | Recognized in the year of sale; only gain above it is deferred | 26 U.S.C. 453(i) |
| Stock or securities traded on an established market | All payments treated as received in the year of sale | 26 U.S.C. 453(k)(2) |
| Dealer property (held for sale to customers) | Excluded from installment treatment | 26 U.S.C. 453(b)(2)(A) |
| Assets sold at a loss | Installment rules don't apply | IRS Topic 705 |
| Depreciable property sold to a related buyer | Generally, all payments treated as received in the year of sale | 26 U.S.C. 453(g) |
Recapture catches sellers off guard. The part of your gain that sections 1245 and 1250 treat as ordinary income, from depreciation you've already deducted, is taxed in the year of sale. A small down payment and a large recapture amount can produce a first-year tax bill bigger than the check you got at closing.
In a stock sale, shares in a company that isn't publicly traded can generally use the installment method, since section 453(k)(2) reaches only traded stock. If your shares may qualify for the section 1202 exclusion, read how the qualified small business stock exclusion works and have your CPA work out how the two rules apply together.
Selling an interest in a partnership, including an LLC taxed as one, follows its own rule. The gain tied to unrealized receivables and inventory can't go on the installment method, while the gain on the other assets can.
Recapture is taxed in the year of sale even when the cash isn't there yet.
How do installment sale business tax rules affect your brackets?
Spreading gain across years can keep more of it in lower brackets. For the 2026 tax year, the 15% long-term capital gains rate runs up to $613,700 of taxable income for married couples filing jointly ($545,500 for single filers), and gains above that are taxed at 20%, per IRS Revenue Procedure 2025-32. A $1,600,000 gain reported in one year puts most of it above that line. Reported over six years, more of it may stay at 15%, depending on your other income each year.
For the 2026 tax year, the net investment income tax (NIIT) is 3.8% of the lesser of your net investment income or your modified adjusted gross income above $250,000 for joint filers ($200,000 for most other filers). Whether sale gain counts as investment income depends on how the business was organized and whether you were active in it. Either way, the gain raises your modified adjusted gross income that year, which can pull other investment income into the tax.
None of this is a promise: tax law can change, and deferring gain also defers the question of which rates apply to it. The capital gains thresholds are adjusted annually; the NIIT thresholds and the section 453A amounts are fixed in the statute but can be changed by law. Confirm the current-year numbers before acting.
What is the interest charge on large installment sales?
Section 453A charges interest on deferred tax when, for the 2026 tax year, both of these are true:
- The sales price is more than $150,000. Sales that are part of the same transaction count as one.
- The face amount of all such notes that arose during the year and are still outstanding at year end is more than $5,000,000.
The unreported gain times the top tax rate for that kind of gain is your deferred tax liability. Only the share of your notes above $5,000,000 is charged; the statute calls it the applicable percentage. It's figured once, at the end of the year of sale, and used for every later year. That share of the deferred tax is multiplied by the IRS underpayment rate and added to your tax each year a balance remains. With an $8,000,000 note outstanding at the end of the year of sale, the applicable percentage is $3,000,000 divided by $8,000,000, or 37.5%, and it stays 37.5% even after the balance falls below $5,000,000.
Borrowing against the note: the pledge rule
If the note secures a loan, the loan proceeds are treated as a payment on the note, and you report gain as if the buyer had paid you. This generally applies to notes from sales over $150,000, even below the $5,000,000 interest test. Farm property and an individual's personal-use property are excepted.
Borrowing against an installment note ends the deferral on what you borrow.
What happens if the buyer stops paying?
Seller financing makes you the buyer's lender. If the business has a hard year under its new owner, your note is one of the bills competing for its cash, and the tax deferral does nothing to help you collect.
The terms that protect a seller are ordinary lending terms:
- A meaningful down payment, so the buyer has money at risk and you have cash for tax due in the year of sale.
- A security interest in the business assets or shares.
- A personal guarantee, where the buyer will give one.
- Financial reporting on a schedule, so you see trouble early.
- Clear default terms drafted by your attorney.
If a bank also lends to the buyer, it may require your note to sit behind its loan.
Three tax points travel with the risk. If the buyer funds an irrevocable escrow to pay your remaining installments, the IRS generally treats the full price as received in the year of sale. The note needs adequate stated interest; if it charges too little, part of each principal payment may be treated as interest, measured against the applicable federal rate. And forgiving part of the note or taking the business back each has its own rules for figuring gain or loss.
Seller financing turns you into the buyer's lender, so set the note's terms the way a lender would.
Can you elect out of the installment method?
Yes. Section 453(d) lets you report the entire gain in the year of sale. You elect by the due date of your return for that year, including extensions, generally by reporting the full gain on it. Once made, the election can be revoked only with IRS consent. Sellers consider it when the sale year is a low-income year, when capital losses can absorb the gain, or when they expect higher rates later. It also means paying tax on money you haven't collected yet.
What changes when you sell to a related buyer?
Two rules apply. Depreciable property sold to a related person, such as an entity you control, generally can't use the installment method unless you show the IRS that avoiding tax wasn't a principal purpose. And if a related buyer resells what they bought within 2 years, before you've been paid in full, what they receive can be treated as received by you. For the estate side of selling to family, see family business succession planning.
Who should run these numbers with you?
Installment sale business tax planning touches the purchase agreement, the note and your retirement income at once. Your attorney drafts the note and the security. Your CPA models the gain by year and files Form 6252 for each year of the note. The question above both is whether the payments and the risk on the note fit the rest of your plan. Anchor provides tax strategy, financial planning and coordination, not tax filing or legal advice, so keep your own CPA and attorney in the room. Anchor acts in your best interest. Anchor operates as a fiduciary under the Investment Advisers Act.
Frequently asked questions
Does an installment sale lower the total tax on selling my business?
It changes when you report the gain; the total gain stays the same. Spreading it may keep more in lower brackets, depending on your income and the law each year. Very large notes can carry a section 453A interest charge.
Can I use the installment method if I sell stock instead of assets?
Generally yes, if the stock isn't traded on an established securities market. Section 453(k)(2) excludes publicly traded stock and securities.
What happens to the note if I die before it's paid off?
Under IRS Publication 537, passing the note to your heirs at death isn't a disposition, and they're taxed on the payments as you would have been. Cancelling the note at death, or transferring it to the buyer, is a disposition, and the estate figures its gain or loss.
Can I sell the note later or give it to my children?
Yes, but selling, gifting or cancelling the note is a disposition, and you report gain or loss on the note at that point.
Sources
- 26 U.S. Code § 453, Installment method (Cornell Legal Information Institute): the method, its exceptions, election out, related-party rules and recapture.
- 26 U.S. Code § 453A, Special rules for nondealers: the $150,000 and $5,000,000 thresholds, the interest charge and the pledge rule.
- IRS Publication 537, Installment Sales: sale of a business, escrow, disposing of the note, death and repossession.
- IRS Topic No. 705, Installment Sales: electing out, loss sales, interest and Form 6252.
- IRS Revenue Procedure 2025-32, section 3.03 (Internal Revenue Bulletin 2025-45): 2026 capital gains rate thresholds.
- 26 U.S. Code Section 1411, Cornell Law School Legal Information Institute: the net investment income tax.
This article is for educational purposes only and does not constitute financial, tax, or legal advice. Anchor Financial Group is a registered investment adviser; investing involves risk, including the possible loss of principal, and past performance does not guarantee future results. Consult a qualified advisor about your specific situation.
