Step-Up in Basis for Inherited Property in Iowa: How It Eliminates Capital Gains

Your father bought 80 acres of Iowa farmland in 1975 for $400 an acre — $32,000 total. That land is now worth $9,000 an acre. If he had sold it before he died, the capital gains on $688,000 of appreciation would have been a serious tax event. But he didn't sell it. You inherited it.

That changes everything.

What the Step-Up in Basis Means

Under Internal Revenue Code Section 1014, when you inherit an asset, your tax basis in that asset is "stepped up" — or adjusted — to its fair market value on the date of the decedent's death. Not the original purchase price. The value at death.

Returning to the farmland example: if the land was appraised at $9,000 per acre when your father died, your new basis is $9,000 per acre. If you sell the land shortly afterward for $9,000 per acre, you have no capital gain. Your proceeds equal your basis. You owe nothing in federal capital gains tax and nothing in Iowa income tax on that sale.

The $688,000 in appreciation your father accumulated over 50 years is completely erased for tax purposes.

Why Iowa Families Benefit So Much from This Rule

Iowa has two asset classes where this provision has extraordinary impact: farmland and residential real estate.

Iowa farmland values have risen dramatically over the past three decades. It is common for farm families to own ground purchased for a few hundred dollars per acre that is now worth $10,000 to $15,000 per acre in prime agricultural counties. The embedded capital gain — the gap between the original cost and current value — is enormous.

For a family that retains farmland until the owner's death, the step-up wipes out that entire embedded gain. Heirs who sell shortly after inheriting owe essentially nothing in capital gains tax. Heirs who continue farming receive a clean, current-market basis to use when they eventually sell.

The same logic applies to a family home purchased decades ago in a Des Moines suburb for $80,000 that is now worth $380,000. The $300,000 gain disappears at death. The heir's basis becomes $380,000.

How the Basis Is Determined

The stepped-up basis equals the fair market value of the asset on the date of the decedent's death. Establishing that value requires a defensible, documented appraisal.

For real estate and farmland, this typically means a certified appraisal by a licensed appraiser conducted as of the date of death. For farmland in Iowa, many county assessors maintain records that provide a starting reference point, but a formal appraisal is the gold standard if the IRS ever questions the number.

For publicly traded securities, the fair market value is typically the average of the high and low prices on the date of death, which is easily documented from brokerage records.

The executor or personal representative is responsible for obtaining these appraisals and documenting the date-of-death values. These same values appear in the probate inventory required within 90 days of appointment under Iowa Code 633.361.

Stepped-Up Basis vs. Carryover Basis: The Gifting Trap

The step-up in basis applies only to inherited property — property transferred at death. It does not apply to property gifted during the owner's lifetime.

If your father had given you that farmland as a gift before he died, you would have received his original basis of $400 per acre. When you eventually sell the land for $9,000 per acre, you would owe capital gains tax on the entire $8,600 per acre appreciation.

This is why highly appreciated assets — farmland, real estate, long-held stock — should generally be held until death rather than gifted during life. The step-up rule creates a powerful incentive to transfer wealth through inheritance rather than lifetime gifts, and it's a central element of Iowa estate planning for farm families.

What Happens to Assets Not Subject to the Step-Up

Not every inherited asset gets a step-up in basis:

Inherited traditional IRAs and 401(k)s do not receive a step-up. These accounts hold pre-tax money — contributions were never taxed. When you withdraw funds, the entire amount is taxable as ordinary income. The basis rule doesn't apply because IRAs don't have a "cost basis" in the traditional sense.

Inherited Roth IRAs are a different story. Contributions were made with after-tax dollars, and qualified distributions are generally tax-free — but not because of the step-up mechanism.

Jointly held property requires careful analysis. When one joint tenant dies, the surviving joint tenant typically receives a step-up in basis on the decedent's half of the property. If a husband and wife owned a $600,000 home jointly (each deemed to own half), and the husband dies, the wife's basis in the home steps up from her original $40,000 half-share to $300,000 (half the current value) — plus her original basis in her half. The exact calculation depends on how the property was held and whether Iowa's non-community-property rules apply.

Documenting the Step-Up: What You Need

If you sell inherited Iowa real estate or farmland, you will need to report the transaction on your federal tax return (Schedule D). The IRS wants to see the stepped-up basis clearly documented.

Essential records to preserve:

• A dated appraisal establishing fair market value as of the date of death
• The probate inventory (if one was filed) showing the asset's listed value
• The county assessor's records as supplementary reference
• Closing statements from any sale

Without proper documentation, the IRS may challenge your claimed basis and assert a lower number — creating a larger taxable gain than you actually have.

A CPA experienced with Iowa estate matters can help document the date-of-death values accurately, especially for farmland where valuation requires knowledge of current agricultural land markets.

Iowa's Flat Tax and Capital Gains

Iowa taxes capital gains at the same flat rate as ordinary income — 3.8% for 2026. There is no separate preferential capital gains rate at the Iowa level the way there is federally (where long-term capital gains rates are 0%, 15%, or 20%).

This means that if you sell inherited Iowa property and have a gain above your stepped-up basis (because the property appreciated further after you inherited it), that gain is taxed at Iowa's flat 3.8%. The federal tax depends on how long you held the asset and your income level.

If you sell at or near the date-of-death value, the gain is minimal or zero at both the state and federal levels.

The Iowa Inheritance Tax Repeal and the Step-Up Rule

Iowa's inheritance tax was repealed effective January 1, 2025. For deaths on or after that date, no Iowa state inheritance tax is owed on any inherited property. This is a separate issue from the step-up in basis.

The step-up in basis is a federal income tax rule, not a state inheritance tax rule. It applies regardless of Iowa's inheritance tax status. The repeal of Iowa's inheritance tax did not change or affect the step-up mechanism — it eliminated a completely different layer of taxation.

For heirs settling Iowa estates right now, both rules work together: no Iowa inheritance tax owed at all, and the step-up eliminates or minimizes capital gains when you sell appreciated assets.

Where to Go from Here

If you're settling an Iowa estate that includes farmland, a family home, or an investment portfolio, the step-up in basis is one of the most important tax planning tools you have. Documenting it properly protects against IRS scrutiny.

The Iowa Final Tax & Estate Tax Guide walks through the full estate settlement process — from obtaining date-of-death appraisals and filing the probate inventory, to understanding the fiduciary income tax return and closing the estate with the Certificate of Acquittance. The guide is built specifically around Iowa's current laws, including the 2025 inheritance tax repeal and the 2026 flat tax rate.

The Core Principle

Inherited property in Iowa gets a new basis equal to its fair market value at the date of death. For farmland and real estate that appreciated significantly over decades, this step-up typically eliminates the capital gains tax entirely upon a prompt sale. Document the value carefully, retain qualified appraisals, and you will position heirs to preserve the maximum amount of the estate.

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