How to file your 2025/26 Self Assessment tax return step by step — who must file, allowable expenses, Government Gateway, SA100/SA103, the 31 January 2027 deadline, and MTD ITSA for income over £50,000.
Do you pay tax on a side hustle in 2026? We explain the £1,000 trading allowance, when you must register for Self Assessment, how side income is taxed on top of a salary, and the records to keep.
When must you register for VAT in 2026/27? The £90,000 threshold explained, the rolling 12-month test, when voluntary registration pays off, and whether to choose the Flat Rate Scheme.
How CGT on cryptocurrency works in the UK for 2026/27: what counts as a disposal, the share-pooling and 30-day rules, the £3,000 exempt amount, 18%/24% rates and how to report gains to HMRC.
Capital Gains Tax on shares in 2026/27: the £3,000 annual exempt amount, 18% and 24% rates, Section 104 pooling, the same-day and 30-day rules, bed-and-ISA, offsetting losses and reporting gains on Self Assessment.
How Capital Gains Tax on UK property works in 2026/27: the 18% and 24% residential rates, the £3,000 annual exemption, the 60-day reporting deadline, and Private Residence Relief.
How the High Income Child Benefit Charge works in 2026/27: the £60,000–£80,000 taper, who pays, how to calculate it, and how a pension contribution can wipe it out.
How to maximise the £500 dividend allowance in 2026/27: spouse shareholding, pension planning, timing strategies and worked examples for directors.
Step-by-step guide to claiming an HMRC tax refund in 2026: P800, R40, P87, Self Assessment and the 4-year backdating window explained.
How the High Income Child Benefit Charge works in 2026/27: the £60,000-£80,000 taper, how adjusted net income is calculated, who pays, and how pension contributions can reduce or wipe out the charge.
The most common Self Assessment errors UK taxpayers make in 2026/27 — from forgetting pension relief and savings interest to missing payments on account — and exactly how to avoid each one.
How National Insurance works for the self-employed in 2026/27: Class 4 at 6%/2%, voluntary Class 2, the qualifying years that build your State Pension, and how to protect your record.
