Browse the growing Calcify guide library in one place.
How tax on UK pension lump sums works: the 25% tax-free rule, the Money Purchase Annual Allowance, the Lump Sum Allowance and Lump Sum Death Benefit Allowance.
Transfer up to £1,260 of your Personal Allowance to your spouse or civil partner. See if you qualify, how to apply, and how much tax you could save.
How splitting your Personal Allowance between two or more PAYE jobs works, when it helps, and why it changes your payslips but not your total tax bill.
Practical strategies to make the most of your £12,570 Personal Allowance in 2026/27: use the Marriage Allowance, manage multiple jobs, avoid emergency codes, and protect your tax-free amount.
Learn the UK pension annual allowance for 2026/27: the £60,000 limit, taper rules, carry forward, money purchase annual allowance, and how to avoid tax charges.
2026 UK National Insurance rates, thresholds, allowances, contribution classes, self-employed NICs, and new merged payroll rules explained clearly.
How payroll tax changes when you retire: State Pension, private pensions, lump sums, the 1257L retirement tax code, and how to avoid the emergency tax trap.
The UK tax year runs from 6 April to 5 April. Learn how tax years work, key milestone dates, how your allowances reset, and the common tax deadlines you need to know for September 2026.
HMRC advisory fuel rates and Approved Mileage Allowance Payments 2026: how much you can claim per mile for business travel, plus a mileage claim calculator.
How the UK Personal Allowance works across multiple jobs or pensions. Learn about BR, D0 and K codes, how to split your £12,570 allowance, and how to check you
Learn how to recover UK tax if you were abroad or absent from the UK. Understand residence rules, split-year treatment, double taxation relief, and claim back tax withheld at source.
Find out if you're owed a PAYE tax refund. Learn how to check your tax code, claim back overpaid tax, and how HMRC refunds work.
UK redundancy pay tax rules: the £30,000 tax-free threshold, how to calculate tax on termination payments, and what counts as contractual vs statutory.
Complete guide to UK tax-free allowances: Personal Allowance, Marriage Allowance, Trading Allowance, Savings Allowance, Dividend Allowance, and more — and how to claim them.
Find out how UK tax refunds work, who may be owed money, how to claim from HMRC, and how long refunds usually take.
Who gets £1,000 or £500 of tax-free interest, and when savings tax starts to bite.
Decode 1257L, BR, D0, K codes and more.
Why it appears, what W1 and M1 mean, and how to fix it.
Who qualifies, how the transfer works, and why backdating matters.
How wages get taxed before they hit your bank.
Profit, expenses and Self Assessment basics.
Last-minute moves to review before 5 April.
Trading allowance, records and when HMRC matters.
Plain-English view of digital record-keeping changes.
Spot fake texts, refund emails and pressure tactics.
Who pays it and how thresholds bite.