Self Assessment Tax Estimator 2026/2027

Tax Year:

PAYE tax code:

Salary £/year:

Dividends £/year:

Self-employment revenue £/year:

Self-employment expenses £/year:

Rental income (net) £/year:

Other taxable income £/year:

Marriage Allowance:

Scottish taxpayer (income tax bands)

Blind Person's Allowance

Pay Class 2 NI voluntarily (State Pension credit, SE only)

Use this calculator if: you have more than one personal income source — a salaried job plus a side hustle, salary plus rental property, pension drawdown plus dividend portfolio, etc. It applies HMRC's Self Assessment ordering (PA → non-savings → dividends) and totals income tax + Class 1 NI + Class 4 NI.
Single income source? Use a dedicated calculator instead: PAYE for employment, Sole Trader for self-employment only, Dividend for investments only.
Run your own Limited Company? The two calculators are complementary, not duplicates: the Limited Co calculator models the company side (Corporation Tax + Employer NI + what salary/dividends you draw, with optimal-split). Then use this SA estimator to add up other personal income that lives outside the company — rental property, external share dividends, freelance side hustle, pension drawdown.
Trading allowance (£1,000) is applied automatically to self-employment when it beats your actual expenses.
Enter rental income net of allowable expenses. UK property is taxed as non-savings income; foreign rental belongs in "Other".
ISA / pension dividends are tax-free — don't include them. Only General Investment Account (GIA) dividends are taxable here.
Not yet modelled in v1: savings interest with Personal Savings Allowance, High Income Child Benefit Charge, Payments on Account cash-flow timing, Capital Gains Tax. See HMRC SA guidance.

Self Assessment Estimator

For people with multiple income streams who file a UK Self Assessment return. Combines salary (PAYE), self-employment profit (with Class 4 NI), rental income, dividends and other taxable income into a single total tax estimate.

Applies HMRC's standard ordering and the same per-year rates as the dedicated single-source calculators — results match the sum of them when used in tandem.

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