Fair market value

Fair market value is the price an asset would reasonably sell for on a particular date between an informed, willing buyer and seller, with neither forced to make the transaction.

Also called: FMV

by Lee Schmidt

Published October 7, 2026

A receipt records a past deal; a valuation asks what a buyer would pay now. Fair market value belongs to a specific date, not to the asset for all time. A home's estimate changes as comparable homes sell, while a car's estimate changes with mileage, condition and the market. That estimated price is different from what you would keep after selling costs and debt repayment.

In a sentence

  • "The home's estimated fair market value is $400,000 as of June 30."
  • "The purchase price tells you what you paid; fair market value tells you what the asset could reasonably sell for now."
  • "You need recent comparable sales to support that fair market value, not just an asking price."

How it's calculated

Fair market value is an estimate supported by market evidence, not a universal formula. For a home or vehicle, recent sales of similar assets are a useful starting point.

  1. Identify the asset and the valuation date. Include its condition and other details a buyer would consider, such as a home's location or a car's mileage.
  2. Find recent comparable sales. Completed sales provide evidence of what buyers actually paid; listings show what sellers hope to receive.
  3. Account for differences. A renovated home is not directly comparable to one needing major repairs, even on the same street. A car's model year, condition and mileage also affect the comparison.
  4. Record the estimate, its date and the evidence behind it. Revisit the value when you update your balance sheet rather than carrying the original price forward indefinitely.

A loan secured by the asset does not reduce its fair market value. Record the debt separately.

An example

Suppose recent comparable sales support a $400,000 fair market value for your home as of June 30. You originally paid $300,000, and the property-tax assessment shows $350,000. For a hypothetical sale at the estimated value, assume $20,000 in selling costs and a $250,000 mortgage payoff, with no other secured debts or deductions.

FigureAmount
Original purchase price$300,000
Assessed value$350,000
Estimated fair market value on June 30$400,000
Mortgage payoff$250,000
Estimated equity before selling costs$150,000
Assumed selling costs$20,000
Sale proceeds after selling costs but before mortgage payoff$380,000
Cash remaining after selling costs and mortgage payoff$130,000

The estimated equity is $400,000 minus $250,000, or $150,000. Selling at that price leaves $130,000 after the assumed costs and mortgage payoff; neither that cash amount nor the original purchase price is the home's fair market value.

Why it matters

An asset recorded at its old purchase price can make your net worth misleading in either direction. A supported current estimate lets you distinguish a change in market value from money you saved or debt you repaid.

The distinction also keeps wealth separate from spendable cash. Higher estimated home equity does not put money in your checking account, and selling costs reduce what a sale would leave you.

Fair market value versus assessed value

Fair market value estimates a sale price; assessed value is a figure assigned for property-tax purposes under local rules. The two can differ because of valuation dates or assessment methods. For your personal balance sheet, do not assume the tax assessment is today's resale price; Does a house count toward net worth? explains how to choose a repeatable home valuation method.

Common questions

Is fair market value the same as what I paid? Not necessarily. A recent purchase can provide evidence of value, but markets and condition change afterward. Taxes and purchase fees also do not necessarily increase what another buyer would pay, while depreciation can reduce a vehicle's value over time.

Does fair market value subtract selling costs? No. Fair market value estimates the asset's sale price before your selling expenses. Subtract those expenses to estimate proceeds before debt repayment, then subtract any debt payoff to estimate the cash left from the sale.

Is an asking price proof of fair market value? No. An asking price is a seller's proposed price, not evidence that a buyer accepts it. Compare recent completed sales and the asset's condition, and remember that an estimate does not guarantee the price a future buyer will pay.

Do I need an appraisal to track my net worth? You can use a reasoned estimate for your own tracking and keep its date and supporting evidence. A professional appraisal can help when the asset is unusual or comparable sales are scarce, but it still estimates value as of a stated date.

Go deeper

Where it shows up in Zypper

Zypper lets you track property and vehicles as manual accounts whose balances you set and update when their real values change. Those balances count toward net worth alongside your other accounts, so you can enter your own current-value estimate when tracking an unconnected asset. See Manual accounts and Net worth tracking, or get started with Zypper.