Check the basis before the percentage
Your scheme may use pensionable pay or qualifying earnings rather than your whole salary. Ask your employer or scheme which pay basis and gross rates apply. This calculator uses the same entered pay basis for both sides; it does not apply earnings bands, legal minimums or employer matching rules.
No additional tax relief, Income Tax, National Insurance, salary sacrifice, annual allowance, fees, growth or retirement benefits are calculated. A gross employee contribution can differ from the deduction shown on a payslip. Numeric limits keep the model bounded; they are not legal contribution limits. General information, not financial advice.
Official guidance and model checks
Context and model checked 2026-10-09. Next scheduled review: 2027-04-09. These sources explain scheme contributions and tax relief; they do not endorse your chosen assumptions. No professional financial review is claimed.
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