Editorial · UK tax 2026/27
taxyear.uk Guides
Long-form, plain-English UK self-assessment explainers. Each guide pairs with a live milestone on the HMRC tax diary so you can read the math, then watch the countdown to the cut-off.
- Self Assessment 7 min read
Self Assessment Deadlines: Avoiding HMRC Late Filing Penalties
Demystifying the strict timeline boundaries for paper (31 October) and online (31 January) UK tax returns. The £100 instant penalty, the £10/day escalation, and the 30 December PAYE-coding escape valve for liabilities under £3,000.
- Self Assessment 8 min read
Understanding HMRC Payments on Account: The Second Year Tax Trap
A comprehensive survival guide for self-employed professionals. Why a £4,000 first-year bill turns into a £6,000 January payment, how the 50/50 advance installment split works, and the SA303 reduction route that lets you cap the over-payment legally.