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Corporate and business tax

The taxation issues you need to consider for both unincorporated and corporate businesses.

Concise information on the taxation issues you need to consider for both unincorporated and corporate businesses. Click on the links below to access the relevant information.

Business motoring - tax aspects

This factsheet focuses on the current tax position of business motoring, a core consideration of many businesses. The aim is to provide a clear explanation of the tax deductions available on different types of vehicle expenditure in a variety of business scenarios.

Capital allowances

The cost of purchasing capital equipment in a business is not a tax deductible expense. However tax relief is available on certain capital expenditure in the form of capital allowances.

Cash Basis for the self-employed

Small unincorporated businesses can calculate their profits for tax purposes on a cash basis rather than the normal accruals basis. We look at the optional rules that allow for this, while also taking in the key tax points.

Companies - tax saving opportunities

Pre-year end tax planning is an important consideration and this factsheet outlines some of the key areas. Topics covered include corporation tax, capital allowances, dividends payments and capital gains.

Corporation Tax - quarterly instalment payments

Under corporation tax self assessment large companies are required to pay their corporation tax in four quarterly instalment payments. This factsheet considers the rules regarding these payments.

Corporation tax self assessment

This factsheet explains the procedures for filing your company’s tax return and paying the tax due.

Fixed rate expenses

An optional system of fixed rate expenses applies for unincorporated businesses. We consider the optional rules which allow the use of a 'simplified' fixed rate deduction instead of actual costs.

Homeworking costs for the self-employed

If you are self employed and work from home this factsheet will summarise what homeworking costs you can claim for tax purposes.

Incorporation

Considerations when operating as a company on incorporation.

Off-payroll working and Personal Service Companies

The 'IR35' rules are designed to prevent the avoidance of tax and national insurance contributions through the use of personal service companies and partnerships. This factsheet summarises what situations are caught by the rules and the implications of the rules.

Research and development

Research and development (R&D) by companies is being actively encouraged through a range of tax incentives, which we consider in the points below.

The Construction Industry Scheme

The Construction Industry Scheme sets out special rules for tax and national insurance for those working in the construction industry. This factsheet considers the workings of the scheme.

Latest News

07 Jul 2025

HMRC system attack is a timely reminder to keep personal data safe

Taxpayers are being urged to check their online HMRC account after scammers attempted to defraud the tax authority using individuals' data and login details.

07 Jul 2025

Government should take more strategic approach to tax policy, says CIOT

The government should take a more strategic approach to tax policy, consulting earlier and giving greater thought to the design of the tax system, says Nichola Ross Martin, President of the Chartered Institute of Taxation (CIOT).