Do I pay capital gains tax when I sell my house in Iowa?
How the federal $250,000 and $500,000 home sale exclusion works, the two-out-of-five-year tests, what Iowa's flat 3.8 percent rate means for gain above the exclusion, and when the sale still has to be reported.
Most Iowa homeowners selling the house they live in owe no capital gains tax on it. Federal law lets you exclude up to $250,000 of gain, or $500,000 on a joint return, if you owned the home and lived in it for at least two of the five years before the sale. Only gain above that amount is taxed, federally and then by Iowa at its flat 3.8 percent rate for 2026.
## The two tests
The IRS describes the exclusion in Topic 701. To claim it you have to pass two tests inside the five years that end on the closing date:
- **Ownership.** You owned the home for at least 24 months. On a joint return, either spouse can meet this one. - **Use.** You lived in it as your main home for at least 24 months. On a joint return, each spouse has to meet this one separately to get the full $500,000.
The 24 months do not have to be the same 24 months for both tests, as long as both fall inside the five-year window. There is one more limit: you generally cannot use the exclusion if you already excluded gain from another home sale in the two years before this one. IRS Publication 523 covers the limits on the amount and the exceptions to the two-year rule.
## What "gain" means here
In plain terms, gain is roughly what you net from the sale minus what you have put into the house, and Publication 523 sets out exactly what counts on each side. As an illustration, a married couple who bought a Des Moines house for $180,000 and sell it for $320,000 have at most $140,000 of gain before costs, well under the $500,000 limit. Your own figures, and a tax preparer, decide your case.
## Where Iowa comes in
Iowa's 2025 return instructions have you complete the federal return first and work from the federal figures, so gain the federal exclusion removes generally does not reach your Iowa return either. Gain above the exclusion, or gain on a house that fails the tests, is taxed by Iowa as income. The Iowa Department of Revenue says all levels of taxable individual income are taxed at a flat 3.8 percent in 2026. If a seller had $40,000 of taxable gain above the exclusion, the Iowa tax on it would be about $1,520, an estimate before any other credits or adjustments.
## When you still report the sale
The IRS says you must report the sale if you receive Form 1099-S from the closing, even when all of the gain is excluded, and you must report it if any of the gain is taxable. The reporting goes on Form 8949 and Schedule D. Ask your closing agent whether a 1099-S will be issued, and keep your purchase papers and improvement receipts with the closing statement.
## The other tax at closing
Income tax is one of several costs that come off a sale. Iowa's real estate transfer tax is paid when the deed is recorded. The proceeds calculator on this site adds that transfer tax, commission and the payoff to show what you would walk away with before you list.