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Claim capital allowances so your business pays less tax when you buy assets - equipment, fixtures, business cars, plant and machinery, annual investment allowance, first-year allowances.

• Overview

  Capital allowances are a type of tax relief for businesses. They let you…

• What you can claim on

  You can claim capital allowances on items that you keep to use in your…

• Annual investment allowance

  You can deduct the full value of an item that qualifies for annual…

• 100% first-year allowances

  If you buy an asset that qualifies for 100% first-year allowances you can…

• The super-deduction and 50% special rate first-year allowance

  Only companies can claim the super-deduction and 50% special rate…

• Full expensing and 50% first-year allowance

  Only companies can claim full expensing and the 50% first-year allowance.…

• Business cars

  You can claim capital allowances on cars you buy and use in your business.…

• How to claim

  Claim capital allowances on your: Self Assessment tax return if you’re a…

How to work out your writing down allowances. Work out main rate pools, special rate pools, single asset pools, small pools allowance, long life assets, short life assets

• When to use writing down allowances

  ‘Writing down allowances’ are one type of capital allowance. They let you…

• Rates and pools

  To claim writing down allowances, group items into pools depending on…

• Work out what you can claim

  What you can claim under writing down allowances depends on what ‘pool’…

Guidance and forms covering how to claim capital allowances. Including allowances for structures, buildings, plant and machinery, and selling assets.

• Updated: 5 February 2024

If you build, buy or lease a structure and all construction contracts were signed on or after 29 October 2018, you may be able to claim tax relief.

• Updated: 3 September 2020

Selling or giving away an asset you claimed capital allowances on - balancing charges, balancing allowances, closing your business, how to claim and pay tax on your tax return

• Updated: 26 November 2025

A new 130% first-year capital allowance for qualifying plant and machinery assets; and a 50% first-year allowance for qualifying special rate assets.

• Updated: 5 March 2021

Definition of capital allowances, how allowances are made and how to claim.

• Updated: 3 September 2015

Get help if you’re a tax agent or adviser who has clients with capital allowances for plant and machinery to declare on Self Assessment and Company Tax returns.

• Updated: 29 July 2022

Use Self Assessment helpsheet HS252 to help you fill in the capital allowances boxes on your tax return.

• Updated: 6 April 2025