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What is it worth, for taxes?

By ALT/FNDATA · November 2026 · 4 min read · Reviewed against IRS Publication 561 and the instructions for Forms 8283, 706 and 709

The tax question usually starts with something that happened. You gave a piece away, someone left you one, you sold it, or you need to insure it. Pick your situation to see which forms apply, what to gather, and what comparable pieces actually sold for.

What is it worth, for taxes?
See what it sold for Request a valuation report or a qualified appraisal
This is not tax or legal advice. ALT/FNDATA is a market-data provider. We supply the real, comparable sold prices that a qualified appraisal is built on. We are not a qualified appraiser for IRS purposes, and nothing here is a substitute for your own appraiser, CPA or attorney. Dollar thresholds, exemptions and deadlines change; confirm your own situation with your advisor before you act.

Which situation is yours?

Why the situation comes first

Every one of these rests on the same idea, fair market value: the price a willing buyer and a willing seller would agree on, with neither forced to act. The IRS says the sales prices of similar property are often important in determining it. What changes from one situation to the next is the date the value is set, the form that asks for it, and the paperwork behind it.

SituationWhat the number is forMain form
DonatedThe date of the giftForm 8283, and a qualified appraisal above $5,000
InheritedThe date of death, or the alternate date six months later where it is availableForm 706, Schedule F
GiftedThe date the gift is madeForm 709
SoldWhat you received against your basisForm 8949 and Schedule D
InsuredToday’s market against the insured figure; before and after a lossForm 4684

Three things every situation needs

Start with the number

See what it sold for

The free Price Check shows real sold prices for the same model, with dates, houses and a low, median and high.

See what it sold for

Need it in writing?

Open the ALT/FNDATA Wealth app and tell us the piece and what it is for.

Request a valuation report or a qualified appraisal

Our form guides

If you already know the form, these guides go deeper on each one:

For your CPA, and free tools

Frequently asked questions

What does fair market value mean for tax purposes?

The IRS defines it as the price at which property would change hands between a willing buyer and a willing seller, with neither forced to buy or sell and both having reasonable knowledge of the facts. For art and collectibles, the IRS says the sales prices of similar property are often important in determining it.

Is my insurance value the same as fair market value?

No. Publication 561 says, using jewelry as its example, that an insured value does not reflect what a willing buyer and seller would pay and reflects only replacement cost.

Which forms apply to art and collectibles?

It depends on the situation. A donation uses Form 8283, an estate uses Form 706, a gift uses Form 709, a sale uses Form 8949 and Schedule D, and a theft or damage loss uses Form 4684. Your CPA confirms which apply to you.

Does ALT/FNDATA give tax advice or act as the appraiser?

No. ALT/FNDATA is a market-data provider. We show what comparable pieces actually sold for. Tax decisions belong to your CPA and attorney, and a qualified appraisal must be prepared by a qualified appraiser as the IRS defines the term.

Sources

ALT/FNDATA offers market data on an "as-is" basis and does not provide tax, legal or investment advice. Data is for informational purposes only. ALT/FNDATA is not a qualified appraiser for IRS purposes; a qualified appraisal must be prepared by a qualified appraiser as defined in Treasury Regulation §1.170A-17. Confirm all tax matters with your own appraiser, CPA or attorney. Last reviewed November 2026 against IRS Publication 561 and the Instructions for Forms 8283, 706 and 709.