What is an installment sale when selling a business?

An installment sale means you receive the purchase price in payments spread over multiple years, not all at once at closing. The tax benefit is direct: you pay capital gains tax only on the money you actually receive each year, not on the full gain in the year of sale. For owners selling a business with a large gain, this can mean the difference between a very large one-year tax bill and a manageable annual payment spread over several years.

The IRS form you file is Form 6252, Installment Sale Income. You file it each year you receive payments.

How the math works

A straightforward example makes this concrete.

Say you sell your business for $2 million. Your cost basis, what you originally invested, adjusted for depreciation and other factors, is $400,000. Your taxable gain is $1.6 million.

At a 20% federal long-term capital gains rate, the federal tax on that gain is $320,000. If you collect the full $2 million at closing, that $320,000 is due the year you sell.

In an installment sale over 5 years, you receive $400,000 per year. Each year, you report a proportional share of the gain. With a $1.6 million gain on a $2 million sale, 80% of each payment is gain. So each year you report $320,000 in gain and pay roughly $64,000 in capital gains tax, instead of $320,000 upfront.

The total tax paid over five years is the same $320,000. The difference is timing: you’re paying from money you’ve already received, and you’re doing it in smaller annual amounts rather than one large hit.

The interest component

When you carry a seller note as part of an installment sale, the IRS requires you to charge a minimum interest rate. That rate is called the Applicable Federal Rate (AFR), the IRS publishes it monthly at irs.gov.

As of recent years, short-term AFR rates have been in the 4 to 5% range, though they move with market conditions. If your note charges less than the AFR, the IRS will treat the difference as interest income anyway, a rule called “imputed interest.”

The interest you earn on the note is taxed as ordinary income, not as capital gains. That’s a meaningfully higher rate for most owners. Your CPA should calculate what that means in your specific situation before you agree to a note structure.

When an installment sale makes sense

An installment sale is most useful in specific situations. It’s not the right answer for everyone.

You expect to be in a lower tax bracket in future years. If you’re selling at 64 and plan to retire with lower income, spreading the gain over several years may keep you in the 15% capital gains bracket rather than the 20% bracket. The savings can be significant.

A lump-sum payment would push you into a higher bracket or trigger additional taxes. Receiving a large gain in a single year can push your income above thresholds that trigger the Net Investment Income Tax (3.8%) or affect Medicare premium calculations. Spreading the gain can keep you below those thresholds.

You want predictable income after the sale. Some owners prefer receiving monthly or quarterly payments rather than a lump sum they have to manage or invest. The installment structure gives you a cash flow stream.

The buyer needs seller financing to get the deal done. In many smaller business sales, the buyer can’t get full bank financing. Carrying a seller note is sometimes the only way to close, and the installment sale tax treatment applies automatically.

The depreciation recapture exception

This is one of the most important things to understand about installment sales, and it catches owners off guard.

Depreciation recapture cannot be deferred in an installment sale. It is taxed in full in the year of sale.

Depreciation recapture is the tax on the portion of your gain that comes from depreciating assets below their actual value. If you bought a truck for $60,000, depreciated it to $0 on your books, and it’s included in the sale at $20,000, that $20,000 is recaptured depreciation. The IRS taxes it at ordinary income rates in the year of sale, not spread across your installments.

For businesses with significant equipment. HVAC companies, plumbing fleets, manufacturing shops, this can mean a meaningful tax bill due in year one even if most of the purchase price is being paid over time. Your CPA needs to calculate this before you finalize the deal structure.

Installment sale vs. seller financing: is there a difference?

In practice, they’re the same thing. When a seller carries part of the purchase price as a note paid over time, it’s both seller financing (from the deal structure perspective) and an installment sale (from the tax perspective).

The terms describe the same arrangement from different angles. Your attorney handles the note structure and security. Your CPA handles the installment sale tax treatment. Both need to be involved before the deal closes, this is not something you restructure after the fact.

Asset sale vs. stock sale: does it matter?

Yes. In a stock sale, the installment sale mechanics are relatively straightforward, you’re selling one asset (your ownership interest) and reporting the gain proportionally as you receive payments.

In an asset sale, which is how most small business sales are structured, the purchase price is allocated among different asset categories. Each category has its own tax treatment. Some categories (goodwill, for example) qualify nicely for installment sale treatment. Others (depreciation recapture, inventory, non-compete payments) do not defer as cleanly or at all.

This makes asset sale installment sales more complex to structure and calculate. A CPA who works with business sales will know how to handle the allocation correctly. One who doesn’t may miss the recapture piece entirely.

Plan this before you have a buyer

The installment sale structure has to be established at the time of the sale. You can’t convert a lump-sum deal into an installment sale after the fact.

This means talking to your CPA about installment sale planning before you’re in active negotiations, ideally 12 to 18 months before you expect to sell. The CPA can run projections showing what your total tax bill looks like under different structures, what bracket effects apply, and whether the interest income from the note creates any unintended complications.

The planning cost is small. The difference in outcome can be substantial.

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Common questions owners ask

What happens if the buyer stops paying in an installment sale?

If the buyer defaults, you've already paid taxes on installments you may never receive. You can pursue them legally, and you may be able to repossess the business, but repossession is complicated, expensive, and rarely results in getting your money back quickly. This is why installment sales work best with buyers who have strong credit, personal guarantees, and some form of collateral. Your attorney should structure protections before the deal closes.

Can I do an installment sale if the buyer is getting an SBA loan?

Yes, often. In many SBA-financed deals, the lender requires the seller to carry a portion of the price as a seller note, typically 10%, on standby for the first 24 months. That portion is effectively an installment sale. The installment mechanics still apply to the note you're carrying; the SBA loan portion is paid to you at closing.

Does depreciation recapture get spread across installment payments?

No. Depreciation recapture, the tax on the difference between an asset's depreciated book value and its sale price, is taxed in full in the year of sale, even in an installment sale. You cannot defer that portion. This is one of the most important things to understand before structuring an installment sale, and your CPA should run the numbers before you agree to a deal structure.

What interest rate do I have to charge in an installment sale?

The IRS requires a minimum interest rate on seller-financed installment notes. That rate is called the Applicable Federal Rate (AFR), and it's published monthly by the IRS. If your note charges less than the AFR, the IRS will impute the difference and tax it as interest income anyway. As of recent years, short-term AFR rates have been in the 4 to 5% range, though they fluctuate with market conditions.