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

In a room, this word explains itself where it appears.

Every term like this one lights up in the step you're on.

Free to set up. No credit card.

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

Was this clear?

One piece of your sale. Here is where all the pieces live.

In your room, this word explains itself where it appears.

Keighbor keeps your whole home sale in one place and defines every term like this one right where you meet it, in the step you're on. Free to set up, with or without an agent.

Set up my roomFree to start. No credit card.