Step-Up Basis Calculator

How to Use This Tool

Follow these steps to calculate step-up basis for inherited assets:

1. Gather asset details: original purchase price, fair market value at the decedent’s date of death, any capital improvements or depreciation claimed by the decedent.
2. Select the asset type and preferred currency from the dropdown menus.
3. Enter the original cost basis, FMV at death, improvements, depreciation, and sale price (if applicable) in the input fields.
4. Click the Calculate button to generate a detailed breakdown of the step-up basis and potential capital gains.
5. Use the Reset button to clear all fields and start a new calculation.
6. Click Copy Results to Clipboard to save the output for tax filing or estate planning records.

Formula and Logic

The step-up basis calculation follows simplified IRS rules for inherited assets:

• Adjusted Original Basis = Original Cost Basis + Capital Improvements - Depreciation Claimed
• Step-Up Basis = Fair Market Value (FMV) of the asset on the decedent’s date of death (alternate valuation dates are not included in this calculation)
• Capital Gain/Loss = Sale Price of Asset - Step-Up Basis (only calculated if sale price is provided)

Heirs assume the step-up basis as their new cost basis for the asset. Capital gains tax applies only to gains above the step-up basis when the asset is sold.

Practical Notes

Keep these finance-specific tips in mind when using this calculator:

• Step-up basis applies only to assets held until the decedent’s death; assets gifted before death use the giver’s original basis.
• Capital improvements include permanent additions like home renovations for real estate, while depreciation applies to business assets like rental properties or equipment.
• Long-term capital gains tax rates are lower than ordinary income tax rates for most filers, so holding inherited assets for over a year before selling may reduce tax liability.
• This tool does not account for state-level inheritance or estate taxes, which vary by jurisdiction.
• Always consult a certified tax professional for official tax advice and filing.

Why This Tool Is Useful

This calculator simplifies complex estate tax calculations for everyday users:

• Heirs can quickly estimate potential tax liabilities before selling inherited assets, avoiding unexpected tax bills.
• Financial planners can use the tool to model different scenarios for clients during estate planning sessions.
• Individuals managing inherited portfolios can track adjusted basis for multiple assets in one place.
• The detailed breakdown helps users understand how improvements and depreciation impact their tax obligations.

Frequently Asked Questions

Does step-up basis apply to all inherited assets?

Most inherited assets qualify for step-up basis, including stocks, real estate, and collectibles. Exceptions include retirement accounts (401(k), IRA) which follow different tax rules, and assets held in certain types of trusts.

What is the alternate valuation date for step-up basis?

The alternate valuation date is 6 months after the decedent’s date of death, used if the estate elects this option to reduce estate taxes. This tool uses the date of death FMV by default; consult a tax professional if the alternate date applies to your situation.

Can I claim a capital loss if I sell an inherited asset for less than the step-up basis?

Yes, capital losses from inherited assets can offset up to $3,000 of ordinary income per year, with excess losses carried forward to future tax years. This tool will flag capital losses in the result breakdown.

Additional Guidance

For accurate results, use official FMV documentation such as appraisals for real estate, closing statements for property sales, or brokerage statements for stocks. Keep records of all capital improvements and depreciation claims for the decedent’s tax filings. If the asset was held in a joint tenancy, only the decedent’s share of the asset qualifies for step-up basis. This tool is for estimation purposes only and does not constitute tax or legal advice.