Installment Sales: How to Spread Capital Gains Tax Over Multiple Years (IRC 453)
An installment sale under IRC 453 is a sale of property where at least one payment is received after the tax year of the sale. The default tax treatment for installment sales is automatic (no election required): the seller reports gain proportionally as payments are received, using the “gross profit ratio” (total gain divided by total contract price). This allows the seller to defer capital gains tax on the unpaid portion of the sale price. For a business owner selling a $1 million asset with $500,000 in gain, an installment sale over 5 years means reporting $100,000 of gain per year instead of $500,000 in Year 1, potentially keeping the seller in a lower tax bracket and deferring $60,000+ in taxes. The installment method is the default for qualifying sales; the seller must actively elect OUT (on Form 6252) to recognize all gain in Year 1.
Installment sale basics:
| Factor | Details |
|---|---|
| Code section | IRC 453 |
| Reported on | Form 6252 (Installment Sale Income) |
| Default or elective? | Default (applies automatically unless elected out) |
| Interest required? | Yes, at least the applicable federal rate (AFR) |
| Who benefits? | Sellers who want to defer capital gains recognition |
Gross profit ratio calculation:
| Component | Formula |
|---|---|
| Gross profit | Selling price - adjusted basis |
| Contract price | Selling price - assumed mortgages (if buyer takes over debt) |
| Gross profit ratio | Gross profit / Contract price |
| Taxable gain per payment | Payment received x Gross profit ratio |
What qualifies for installment treatment:
| Eligible | NOT Eligible |
|---|---|
| Real estate (investment or business) | Inventory (IRC 453(b)(2)) |
| Business assets (equipment, goodwill) | Publicly traded securities (IRC 453(k)) |
| Privately held stock | Dealer dispositions (IRC 453(b)(2)) |
| Personal property sold at a gain | Depreciation recapture (IRC 453(i), recognized in Year 1) |
Key rule: Depreciation recapture isn’t deferrable
| Component | Installment Treatment |
|---|---|
| Capital gain (above original cost) | Deferred over installment period |
| Section 1250 recapture (25% rate) | ALL recognized in Year 1 |
| Section 1245 recapture (ordinary income) | ALL recognized in Year 1 |
How does an installment sale work?
What is the difference between short-term and long-term capital gains rates?
Assets held for one year or less generate short-term capital gains, taxed at your ordinary income tax rate (up to 37% federal). Assets held for more than one year qualify for long-term capital gains rates of 0%, 15%, or 20%, depending on your taxable income. High-income taxpayers may also owe the 3.8% net investment income tax (NIIT) under IRC 1411 on top of the capital gains rate. The holding period starts the day after you acquire the asset and includes the day you sell it. For business owners planning a sale, timing the disposition to cross the one-year threshold can save 15-20 percentage points in federal tax on the gain.
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Yarik Yarosh, CPA. "Installment Sales: How to Spread Capital Gains Tax Over Multiple Years (IRC 453)." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-installment-sale-tax-deferral-irc-453
This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.