Topic overview

Corporation tax

Business owner calculating corporation tax

Corporation tax is charged on a company's profits. If you trade as a limited company, you'll want to ensure that paying corporation tax is as painless as possible - both in terms of paperwork and the total corporation tax payable.

In terms of corporation tax rates, the UK rate is relatively low - significantly lower than personal income tax. This can provide beneficial tax planning opportunities.

UK corporation tax basics

Corporation tax is charged on taxable profits. This includes trading profits and most investment profits. It also includes any capital gains (where you have sold an asset for more than you paid), usually referred to as chargeable gains.

Corporation tax is generally charged on your taxable profits for a 12-month accounting period that matches your company financial year. There can be exceptions, for example, when you start a new company or change your financial year-end.

UK corporation tax rules set out exactly which reliefs and capital allowances can be set against business income in calculating your taxable profits. Most legitimate business expenses can be.

Corporation tax rates (UK)

Your corporation tax liability is calculated by multiplying taxable profits by the corporation tax rate. The amount of corporation tax payable depends on your total profits.

The single main rate of corporation tax is 19% on all taxable profits.

Corporation tax records, returns and payments

Keeping accurate corporation tax records of your income and expenses is essential - and a legal requirement. This guidance from HMRC explain what corporation tax records you need to keep, how long you need to keep them, and what can happen if you don’t keep adequate records or retain them long enough.

You must pay your corporation tax within nine months of the end of your accounting period, or in instalments if your profits exceed £1.5m. You must also file your corporation tax return within 12 months. You are responsible for calculating the corporation tax due and making sure that you submit the return online in accordance with HM Revenue & Customs requirements.

Most companies find that using an accountant is the best way to ensure they meet their corporation tax obligations. In addition, your accountant can advise you on the best opportunities to reduce the total corporation tax (and other taxes) you pay.

HMRC have introduced online personal tax accounts. All small businesses and personal tax payers now have their own account. You can view your tax transactions across the range of business taxes including self assessment, corporation tax, VAT and PAYE for employers and to make payments at any time.

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