What is a Companies House personal code? Learn how to get, find and use your 11-character code, with 2026 identity verification rules and PSC deadlines.

What is a Government Gateway user ID? Learn how to find or recover yours, sign in to HMRC and understand the switch to GOV.UK One Login.

R&D tax credits explained for UK companies. Check 2026 relief rates, eligibility, qualifying costs and HMRC claim rules. Includes a free R&D calculator.

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 HMRC online services with our UK guide. Learn how to sign in, register, use Government Gateway or GOV.UK One Login and fix common issues.

What is my PAYE reference number? See what an Employer PAYE Reference looks like, where to find it on your P60 or P45, and how it differs from a UTR.

What is a Lasting Power of Attorney? Learn about LPA costs, financial and health powers, how to apply, registration times and choosing attorneys.

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.

Can you lease a car through your business? Discover UK Corporation Tax relief, VAT recovery, company car BiK and electric car leasing rules for 2026/27.

Check employment status using HMRC's CEST tool. Learn how to determine employed or self-employed status, understand IR35 and interpret your results.

Can I create a holding company in the UK? Learn how holding companies work, their tax benefits and how to add one above an existing company.

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.

Can you still claim working from home tax relief? See the 2026/27 rules for employees, previous-year claims, employer payments and self-employed expenses.

VAT registration explained for UK businesses. Learn about the £90,000 VAT threshold, when you must register, voluntary registration and how to apply.

What does an NT tax code mean? Learn why HMRC may issue an NT code, whether you still pay National Insurance, and what to do if your tax code is wrong.

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.

High Value Council Tax Surcharge explained. See who pays, the £2m threshold, 2028 rates, property valuations, exemptions and how the new charge works.

Renters' Rights Act 2025 explained. See the rules now in force for landlords and tenants, including Section 21, rent increases, pets and tenancies.

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.