UK tax tool
A hedged estimate of your 2026/27 Self Assessment outcome from employment, side income, dividends and savings.
Based on the figures provided. This is a simplified estimate and does not include Class 2 / 4 NIC, capital gains, or payments on account.
Always confirm via your HMRC Self Assessment account or a qualified accountant before filing.
Sample: £40k salary, £5,500 PAYE, £8k freelance, £1k dividends. Estimated to owe ~£1,750.
Refund expected
PAYE may have over-collected.
Small bill
Possibly under £500. Check savings / dividend timing.
Larger bill
Worth setting money aside ahead of January 31.
Employment £40k, PAYE £5,500. Side gig £8k profit. Dividends £1,000.
Non-savings: £48k - PA £12,570 = £35,430 x 20% = £7,086. PAYE covered £5,500. Owed on side income: ~£1,586.
Dividends: £500 free + £500 x 8.75% = £44. Total bill ≈ £1,630.
Common triggers: self-employment over £1,000, untaxed income over £2,500, dividends over £10,000, income over £150,000, child benefit at higher income.
Not in this version. Adds may be needed for self-employed profit.
Not modelled. HMRC may also bill you upfront for the next tax year.
No - those need a separate computation.
We approximate it by extending your basic rate band by the gross contribution you enter.
Sources
Last verified: 2026-05-03.
Disclaimer: Simplified estimate only. Not a substitute for filing via HMRC or speaking to a qualified accountant.