Iowa taxes for early retirees: 3.8% flat until 55, then your IRA goes tax-free

By Tom, CPA · Updated October 29, 2026

TL;DR: For 2026 Iowa taxes income at a flat 3.8% starting from federal taxable income. From age 55, pension, IRA and 401(k) income is excluded, Social Security is exempt, and inheritance tax is gone.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Iowa used to be the state your accountant warned you about at parties. Nine brackets, top rates near 9%, and a tax on retirement income that felt personal. Then the legislature took a leaf blower to the whole thing. For 2026 Iowa has a flat 3.8% income tax, Social Security is exempt, and retirement income is fully excluded once you're 55. The inheritance tax is gone too.

That 55 threshold is the headline for early retirees. Before it, your IRA withdrawals and Roth conversions pay 3.8%. After it, they pay nothing. Frugal Fran calls this "the best birthday present a state has ever given me." Lavish Larry asked if he can be 55 retroactively. He can't. This guide walks through the 2026 rules, property tax, residency and the numbers.

CPA Warning Label: The age-55 exclusion is per person: a 54-year-old's IRA withdrawal is fully taxable even if a spouse on the same joint return already qualifies.

The 2026 rate: 3.8%, flat

Iowa Code section 422.5 sets the individual income tax at a single rate of 3.8%, and the 2026 IA 1040 applies that flat rate. There's no bracket table to memorize. The bigger structural change: the IA 1040 now starts from federal taxable income, not federal AGI. That means your federal standard deduction (or federal itemized deductions) flows straight into Iowa. Iowa has no separate standard deduction or personal exemption on top.

From federal taxable income, Iowa adds back and subtracts its own adjustments (the big one for retirees is the retirement income exclusion), then multiplies by 3.8%. Credits come off after that. It's about as simple as a state income tax gets without just not having one.

Retirement income: excluded at 55

The Iowa Department of Revenue's retirement income guidance says retirement income is excluded from Iowa income for taxpayers who are 55 or older, disabled, or the surviving spouse or other survivor of someone who qualified. The exclusion covers pensions, annuities, traditional IRA distributions, 401(k), 403(b) and 457 distributions, and similar plans, and it's claimed on Schedule 1. There's no dollar cap.

• Age is checked per person. On a joint return, the exclusion applies to the retirement income of each spouse who qualifies. If one spouse is 56 and the other is 52, only the 56-year-old's distributions are excluded.
• Roth conversions after 55: the Department of Revenue lists Roth conversion income by name as qualifying, so a conversion by a taxpayer who is 55 or older on December 31 is Iowa-tax-free, with no dollar cap.
• Before 55: withdrawals and conversions are taxed at 3.8% after the federal deduction. That's still cheap compared with most states.
• Social Security: not taxed by Iowa at any age.
• Capital gains, dividends and interest: taxed at 3.8%. The exclusion is for retirement plan income, not your taxable brokerage account.

Illustration: Frugal Fran is single and 54 in 2026. Assumptions: an $80,000 traditional IRA withdrawal, no other income, federal standard deduction. Federal taxable income is $80,000 minus $16,100, or $63,900. Iowa tax is 3.8% of $63,900, or $2,428.20. If Fran waits until the year she turns 55 and takes the same withdrawal, it's excluded and her Iowa tax is $0. One birthday, $2,428.20.

Illustration: Lavish Larry is single and 58. Assumptions: $60,000 of IRA withdrawals plus $40,000 of long-term capital gains, federal standard deduction. Federal taxable income is $100,000 minus $16,100, or $83,900. Iowa subtracts the $60,000 of retirement income, leaving $23,900. Iowa tax is 3.8% of $23,900, or $908.20. All of it comes from the brokerage gains.

Strategy for the under-55 crowd

Early retirees in Iowa face a choice between paying 3.8% now or 0% later. The math usually says wait, with exceptions:

1. Live on taxable brokerage money and cash until 55. Gains are taxed at 3.8% in Iowa, but you're only taxed on the gain, not the whole withdrawal.
2. Delay big Roth conversions until 55. The federal bill is the same either way; Iowa's piece drops to zero. A Roth conversion ladder that starts at 55 keeps more money.
3. Don't ignore the federal side. Waiting to convert can push more income into years when Social Security also starts, which brings the tax torpedo and ACA subsidy issues into play. Iowa's 0% doesn't fix those.
4. Rule of 55 401(k) withdrawals line up with Iowa's age 55 neatly, if you separated from service in or after the year you turned 55.

Property tax: homestead changes coming

Iowa's property tax relief for homeowners is changing. Under Senate File 2472, signed May 18, 2026, the old homestead credit (tax on the first $4,850 of value) is replaced by a homestead exemption of 10% of taxable value, with a minimum of $5,500 and a maximum of $20,000. It starts with assessment year 2026, which means property taxes payable in September 2027 and March 2028.

Homeowners 65 or older also get the existing homestead exemption of $6,500 of taxable value, which stays in place. You apply with your city or county assessor, and the exemption continues as long as you own and live in the home.

Iowa property taxes are higher than its income tax might suggest, so check the levy rates in the county you're looking at. A 3.8% income tax doesn't help much if your house costs twice as much a year to own.

Estate and inheritance tax: gone

Iowa phased out its inheritance tax. The Department of Revenue says no inheritance tax applies for deaths on or after January 1, 2025. Iowa has no estate tax. For federal estate tax rules, see estate tax basics.

Residency and estimated payments

If you move into or out of Iowa during the year, you file as a part-year resident and pay Iowa tax on income received while you were a resident. Iowa also has a credit for taxes paid to another state on income taxed by both. For planning a move, see changing your state residency.

Estimated payments got easier. Starting with tax year 2026, the Department of Revenue raised the estimated payment threshold from $200 to $1,000. If you expect to owe $1,000 or more after withholding and credits, make quarterly payments. If you're 55+ and living on excluded retirement income, you might owe nothing at all.

Common Iowa mistakes (and how to dodge them)

Iowa's rules are simple, which makes the mistakes people do make extra annoying. A few to avoid:

• Assuming the exclusion covers everything at 55. It covers retirement plan income. Your brokerage account's dividends, interest and capital gains still pay 3.8%. If you sell a big chunk of index funds at 57, Iowa will want its share.
• Forgetting the per-person rule on joint returns. Couples with an age gap should think about whose IRA to draw from first. Taking withdrawals from the older spouse's IRA after they turn 55 can be tax-free in Iowa while the younger spouse's identical withdrawal is not.
• Taking a big withdrawal in December of the year before you turn 55. You qualify if you're 55 or older on December 31 of the tax year, so any withdrawal in the calendar year you turn 55 counts, even in January. A withdrawal on December 31 of the prior year doesn't, which makes a one-day delay worth a full 3.8%.
• Ignoring withholding. IRA custodians may withhold Iowa tax by default under the IA W-4P rules. If your distributions are excluded, you can file a 2026 IA W-4P to adjust Iowa withholding instead of waiting a year for a refund.
• Itemizing on the federal return without checking Iowa. Because Iowa starts from federal taxable income, your federal choice between the standard deduction and itemizing carries into Iowa. That's usually fine, but run the numbers if you're close.

Fran keeps a sticky note on her fridge: "Brokerage before 55, IRA after 55." Larry has a sticky note that says "brisket," which is less helpful but more motivating.

How Iowa compares

Once you're 55, Iowa is one of the cheapest income tax states in the Midwest for retirement account income. Compare it with Illinois, which also exempts retirement income but taxes brokerage income at a higher flat rate, Minnesota, which taxes most retirement income at higher rates, and Colorado, which has an age-based partial exclusion. Before 55, Iowa is still a low, flat 3.8%. Larry's verdict: "It's like a no-tax state that makes you earn it."