Tax question guide

How much tax do I pay in the UK?

A compact 2026/27 guide to estimating UK salary tax, National Insurance, pension and student-loan deductions, with take-home pay as the practical answer.

Answer first

The useful answer is not one tax number. For salary decisions, you need Income Tax, National Insurance and other payroll deductions together, then the monthly take-home amount.

2026/27 UK tax-year reference · GOV.UK/HMRC aligned · estimate-based salary guidance

Calculate your salary after tax Read UK tax bands

Income Tax

Band-based

Charged in taxable slices.

Separate

Not the same as Income Tax.

Decision number

Net monthly

Best for bills and offers.

Direct answer

Your tax depends on more than salary.

Gross salary is the starting point. The final amount you keep depends on taxable income, tax code, region, National Insurance, pension contributions, student loan plan and payroll timing.

That is why TaxDecod focuses on take-home pay instead of showing tax in isolation.

Main deduction layers

Separate the deductions before judging the result.

Income Tax is usually band-based, National Insurance is calculated separately, and pension or student-loan deductions can change the bank-account result again.

Use tax bands to understand PAYE Income Tax.

Use NI thresholds to understand the National Insurance line.

Use pension and loan settings to make the estimate closer to a payslip.

Monthly planning

Take-home pay is the number to use for real decisions.

For rent, bills, saving, job offers and salary negotiations, monthly net pay is usually more useful than total annual tax paid. Tax explains the deduction; net pay explains the reality.

When to double-check

One unusual payslip does not always mean the estimate is wrong.

Bonuses, emergency tax, tax-code changes, payroll corrections, salary sacrifice and student-loan updates can all move one pay period. If a month looks wrong, compare the payslip lines before assuming the salary estimate is broken.

Use the answer.

Calculate take-home pay

Estimate tax, NI and deductions together.

Check a payslip

Use real payroll lines when something looks off.

Compare salaries

See how much of a raise you actually keep.

Common questions

Is Income Tax my total tax bill?+

Not for take-home pay. National Insurance and other payroll deductions can also reduce net salary.

Should I use annual tax or monthly net pay?+

Use monthly net pay for budgeting. Annual tax is useful for understanding the deduction, not day-to-day affordability.

Why can my payslip differ from a calculator?+

Tax code, payroll timing, pension, student loan, bonus and correction lines can all create differences.