What does the 0T tax code mean? Discover why HMRC uses it, how much tax you pay, how to correct it and whether you can claim a refund.

Access your HMRC Personal Tax Account. Learn how to sign in, register with GOV.UK One Login, check tax codes, claim refunds and manage Self Assessment.

Should you pay voluntary NI contributions? See 2026/27 Class 2 and Class 3 rates, how to fill NI gaps and whether paying could increase your State Pension.

What is the 40% tax bracket? Learn when 40% higher-rate Income Tax starts in 2026/27, how the £50,270 threshold works and how much tax you pay.

Higher rate tax relief on pension contributions explained for 2026/27. See how 40% pension tax relief works, how much you can claim and how to claim it.

The UK Personal Allowance is £12,570 for 2026/27. Learn how it works, the £100,000 taper, £125,140 limit, tax code 1257L and the 60% tax trap.

Compare the best tax-free investments in the UK for 2026/27, including ISAs, Premium Bonds, pensions and LISAs. See allowances, tax benefits, access and risks.

Learn how to file a Self Assessment tax return for 2025/26. Step-by-step guide to HMRC deadlines, allowable expenses, tax payments and filing online.