About WorkCalc UK

WorkCalc UK is a free, independent set of calculators and plain-English guides for UK pay and workplace questions: what you take home, what a pay rise is really worth, how much holiday you are owed, what your notice period is, how redundancy pay is taxed and what the NHS pays at each band.

Why WorkCalc UK exists

Most pay questions have a precise answer, but it is usually buried in legislation, HMRC manuals or long GOV.UK pages. Many online calculators give a single number without showing the working, skip the edge cases, or quietly go out of date each April. WorkCalc UK does the opposite: every tool shows how the figure is calculated, explains the rules that affect it, and states which tax year and rates it uses.

Who writes it

Nathan Rowe

Nathan Rowe covers UK workplace pay and entitlements for WorkCalc UK: take-home pay, holiday entitlement, redundancy, notice periods, NHS pay and pensions, and tax on termination payments. Every calculator and guide is built directly from primary sources: HMRC rates and thresholds, the Working Time Regulations 1998, the Employment Rights Act 1996, the NHS Terms and Conditions of Service Handbook and GOV.UK guidance, cross-checked against official calculators and published examples rather than assumed.

WorkCalc's calculators and guides are updated as rates and thresholds change each tax year. Nathan also covers Australian pay and entitlements, including annual leave, long service leave and the National Employment Standards, for WorkCalc Australia.

How WorkCalc UK checks its calculator figures: primary sources, computed tables, hand-worked tests and dated updates each April
How WorkCalc UK checks every calculator.

How every calculator is built and checked

  • Primary sources first. Figures come from the source that sets them, not from summary sites. Tax and National Insurance thresholds come from HMRC, minimum wage rates from the statutory instrument, statutory redundancy limits from the order that sets them, and NHS pay from NHS Employers.
  • Legislation for the rules. Holiday and pay rules are checked against the Working Time Regulations 1998 and the Employment Rights Act 1996 on legislation.gov.uk, and against Acas and GOV.UK guidance.
  • Cross-checked, not assumed. Results are tested against official calculators and published worked examples before a page goes live.
  • Computed, not typed. Reference tables and worked examples are produced from the same formulas that run the calculator on the page, so the table and the tool agree.
  • Dated. Every page states the tax year it uses and when its figures were last verified.

Main sources

  • HMRC: income tax, National Insurance and student loan thresholds, PAYE and termination payment guidance
  • GOV.UK: holiday entitlement, National Minimum Wage, redundancy and bank holiday data
  • legislation.gov.uk: Working Time Regulations 1998, Employment Rights Act 1996, Income Tax (Earnings and Pensions) Act 2003
  • NHS Employers: Agenda for Change pay scales and the NHS Terms and Conditions of Service Handbook
  • Office for National Statistics: earnings and inflation data
  • Scottish Government: Scottish income tax rates and bands
  • Acas: guidance on employment rights, holiday and notice

Keeping figures up to date

UK pay rules change on fixed dates each year, and pages are reviewed around them:

WhenWhat changes
1 AprilNational Minimum Wage and National Living Wage; NHS pay awards and pension tiers
6 AprilIncome tax bands, National Insurance and student loan thresholds, statutory redundancy limits
6 AprilScottish income tax bands
Through the yearBudget announcements, pay awards and new legislation, checked as they are confirmed

Estimates, not advice

Results are estimates based on the assumptions stated on each page, such as a standard 1257L tax code. Your payslip, your HMRC personal tax account or your employer's payroll team have the final word on your own figures. WorkCalc UK does not give individual financial, tax or legal advice; for help with your own situation, contact HMRC, Acas or Citizens Advice.

Your privacy

Every calculator runs in your browser. The figures you type are not sent to a server or stored. See the Privacy Policy for how analytics and cookies are used.

Independence and advertising

WorkCalc UK is independent and is not affiliated with HMRC, GOV.UK, Acas, NHS Employers or any employer or payroll provider. The site may carry advertising to keep the calculators free. Advertisers have no influence over calculator results or editorial content, and nothing on the site is paid placement.

Corrections

Rates change and mistakes happen. If a figure looks wrong, email annualcalculator@gmail.com with the page address, the numbers you entered and the figure you expected. Reported errors are checked against the published rules; confirmed errors are fixed and the page's verified date is updated.

WorkCalc Australia

Our sister site, WorkCalc Australia, applies the same approach to Australian pay: take-home pay, annual leave, redundancy, long service leave, tax on termination payments and the National Employment Standards, built from the Fair Work Act 2009, ATO tax schedules and state legislation.

New here? Start with the Take-Home Pay Calculator, browse salary after tax figures, or read the guides. Questions or ideas: contact us.

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