Boot

Cash or other non-like-kind property received in a 1031 exchange. Boot is taxable, even when the rest of the exchange qualifies for deferral. A common source is not reinvesting all the proceeds.

Taxes & insurance · Updated September 2026

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Part 1 of 4

Why a seller cares

In a 1031 exchange, any cash or debt relief you walk away with is boot, and boot is taxed. Selling a rental for $400,000 and buying a replacement for $350,000 leaves $50,000 of boot, however the rest is structured.

Part 2 of 4

A simple example

You sell a rental for $400,000 with a $150,000 mortgage and buy a replacement for $380,000 with a $140,000 mortgage. There is cash boot and mortgage boot.

Boot: a simple example
What happenedThe boot
$20,000 less spent on the replacementCash boot, taxable
$10,000 less debt on the replacementMortgage boot, taxable unless offset with cash
Everything reinvested and debt replacedNo boot; full deferral

Boot is whatever did not get rolled forward. The tax follows it.

Part 3 of 4

What people get wrong

That an exchange is all or nothing. A partial exchange still defers most of the gain; only the boot is taxed.

Part 4 of 4 · where to read next

Where it appears in the sale

What a definition is, and what it isn't

Keighbor is a software company, not a law firm, brokerage, or tax adviser. This is general information, not legal, tax, financial, or real estate advice about your sale. Your situation may differ. Before acting on a contract, disclosure, title, tax, or pricing question, ask an appropriately licensed professional in your state.

Written and researched by Keighbor Research · drawn from the reference glossary · how we research and check what we publish

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