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UK tax & personal finance guides

Clear, plain-English explanations of how UK tax works — each linked to the calculators that put the numbers to work. Search or browse by topic.

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Income Tax

How UK Income Tax Works

Income Tax is charged on most of the money you earn once it passes your tax-free Personal Allowance. This guide explains the allowance, the…

6 min read · Updated Jul 2026
Payroll

Understanding National Insurance

National Insurance (NI) is a separate deduction from Income Tax that helps pay for state benefits and the State Pension. This guide…

5 min read · Updated Jul 2026
Latest

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Self Assessment

Claiming Back Overpaid CIS Tax

CIS subcontractors commonly have more deducted during the year than they actually owe, because the deduction is taken from gross payments…

5 min read · Updated Sep 2026
Business Tax

How CIS Deductions Work

The Construction Industry Scheme (CIS) requires contractors to deduct money from payments to most subcontractors and pass it to HMRC in…

5 min read · Updated Sep 2026
Income Tax

How UK Income Tax Works

Income Tax is charged on most of the money you earn once it passes your tax-free Personal Allowance. This guide explains the allowance, the…

6 min read · Updated Jul 2026
Income Tax

How UK Income Tax, allowances and tax bands work.

Income Tax

How UK Income Tax Works

Income Tax is charged on most of the money you earn once it passes your tax-free Personal Allowance. This guide explains the allowance, the…

6 min read · Updated Jul 2026
Income Tax

Personal Allowance Explained

The Personal Allowance is the amount you can earn each tax year before paying Income Tax. This guide explains how it works, when it is…

4 min read · Updated Jul 2026
Self Assessment

Filing, deadlines and paying tax through Self Assessment.

Self Assessment

Claiming Back Overpaid CIS Tax

CIS subcontractors commonly have more deducted during the year than they actually owe, because the deduction is taken from gross payments…

5 min read · Updated Sep 2026
Business Tax

Corporation Tax, self-employment and small-business tax.

Business Tax

How CIS Deductions Work

The Construction Industry Scheme (CIS) requires contractors to deduct money from payments to most subcontractors and pass it to HMRC in…

5 min read · Updated Sep 2026
VAT

VAT registration, rates, schemes and returns.

Payroll

PAYE, National Insurance and payslip deductions.

Payroll

Understanding National Insurance

National Insurance (NI) is a separate deduction from Income Tax that helps pay for state benefits and the State Pension. This guide…

5 min read · Updated Jul 2026