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Why doesn't the result match my payslip?
The calculator uses standard HMRC rules (1257L tax code). If you have a non-standard tax code, benefits in kind, or unusual deductions, your payslip may differ. Enter your actual tax code in the advanced settings if available.
Can you add [specific feature]?
Absolutely — feature requests are welcome! Use the feedback form above with the "Feature request" category. Popular requests get prioritised. We've already shipped several features suggested by users.
Is the calculator updated for 2026/27?
Yes. The calculator uses the current 2026/27 HMRC thresholds for income tax, National Insurance, and all student loan plans including Plan 5 (which started April 2026). We update within 24 hours of any HMRC change.
Can I get personalised tax advice?
We're a free calculator, not a tax advisory service. For personal advice on your tax situation, speak to a qualified accountant or use HMRC's contact channels at gov.uk/contact-hmrc.