About PayCalc UK
Last updated: June 2026
PayCalc UK provides free, accurate financial calculators and plain-English guides for people living and working in the United Kingdom. Our goal is simple: help you understand your money without jargon, sign-ups, or hidden costs.
What we offer
Our calculators cover the everyday financial questions UK households face:
- Take-home pay — income tax, National Insurance, student loan and pension deductions
- Mortgage repayments — monthly costs, total interest and loan-to-value
- Pension projection — retirement pot growth with tax relief and employer contributions
- Savings — compound interest on regular and lump-sum saving
- Universal Credit — estimated monthly entitlement
Alongside each calculator we publish a guide explaining how the underlying system works, so you can understand not just the number, but why it is what it is.
Our approach to accuracy
Where a calculator uses UK rates, thresholds or allowances, we take them from official sources such as GOV.UK, HMRC and DWP. For borrowing, mortgages and general money guidance we use standard financial formulas and trusted public guidance such as MoneyHelper. We update our rates each tax year, verify our formulas against official calculators where they exist, and say so clearly when a figure is an estimate or simplification. For the full detail — our sources, the tax year we use and the formulas behind each tool — see how we calculate.
What we are not
PayCalc UK provides information and illustrative calculations only. We are not financial advisers, accountants, or mortgage brokers, and nothing on this site is personal financial advice. For decisions about your money, we always recommend speaking to an appropriately qualified professional. See our disclaimer for full details.
Independence
Our calculators are free to use. We may display advertising to cover the cost of running the site, but advertisers do not influence our calculations, guides, or the figures we publish.
Get in touch
Found an error, or have a suggestion for a calculator we should add? We genuinely want to hear it — accuracy matters to us. Visit our contact page.