Self-Employed Tax Calculator UK 2026/27
How much tax and National Insurance to set aside as a sole trader for 2026/27: income tax plus Class 4 NI on your profit.
Questions
What National Insurance do sole traders pay?
Class 4 NI at 6% on profits between £12,570 and £50,270, and 2% above. Class 2 is now voluntary.
When is Self Assessment tax due?
The balancing payment is due by 31 January after the end of the tax year, and payments on account (if they apply) on 31 January and 31 July.
Keeping self-employed records? Ledgr does invoices and a tax-year ledger for £0–£5 a month.
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