Free self-employed tax tools

Estimates and checklists for UK sole traders. No account, no software signup. Figures are for 2026/27 unless the page says otherwise.

Calculator Self-employed tax calculator Turnover, expenses, trading allowance toggle, England/Wales/NI vs Scotland. Shows Income Tax, Class 4 NI, and a monthly saving pot. Deadlines Self Assessment deadline calendar 31 January, Payment on Account, paper vs online, PAYE coding date, and the penalty ladder. Days-until banner included. Checklist Expense checklist by trade The same claimable list as the trade pages, filterable, print-friendly.

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The UK Self-Employment Tax Guide takes you through registering, filing your return and claiming every expense — in plain English. One-off £19.99, instant PDF download.

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