Ask PayslipIQ · Last reviewed 2026-05-08
Do I need to file a UK tax return?
Most PAYE employees do not. You normally need to file a Self Assessment if you are self-employed, earn over £100,000, have untaxed income above £2,500, or owe Capital Gains Tax. HMRC writes to you if they think you should file. The full list of triggers is on gov.uk/check-if-you-need-tax-return.
PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, payroll, accounting, pension, benefits or employment advice. Always verify your payslip, tax code, deductions and take-home pay with your employer's payroll department, HMRC, your pension provider, a qualified accountant, tax adviser or another appropriately qualified professional.
If your only income is PAYE salary and basic interest, you almost certainly do not need to file. PAYE handles your tax in real time.
Common triggers: rental income, side businesses, dividend income above the allowance, untaxed foreign income, and crypto disposals.
If you do need to file, the deadline is 31 January following the tax year (so 31 January 2027 for the 2025/26 tax year). Late filing carries automatic penalties even if you owe nothing.
Related
Reviewed by PayslipIQ Editorial. Sources cited where applicable.
PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, payroll, accounting, pension, benefits or employment advice. Always verify your payslip, tax code, deductions and take-home pay with your employer's payroll department, HMRC, your pension provider, a qualified accountant, tax adviser or another appropriately qualified professional.