Who operates MySums
MySums is built and operated by me, Eman Munir, ACCA, a Chartered Certified Accountant and a co-founder of the site. I write and personally review every calculator here. More about who is behind MySums is on the about page.
Not financial, tax or legal advice
Nothing on this site is financial, tax, mortgage, legal or professional advice. A result is not a recommendation to take or avoid an action, and using a calculator does not create an adviser-client relationship.
Every result is an estimate
Calculators apply published rules for the 2026/27 tax year to the figures you enter and the assumptions shown on that page. They cannot know employer-specific rules, other income, reliefs, benefits, unusual tax-code adjustments or information held by HMRC. Real figures may therefore differ.
Accuracy is not guaranteed
Rates, thresholds and calculations are reviewed against published sources, with methodology shown on calculator pages and the About page. Rules can change and no guarantee is given that a result is complete, current or free from error.
Independent from government
MySums is independent. It is not affiliated with or endorsed by HMRC, gov.scot or the UK Government and is not an official government service.
Before relying on a result
- Compare the estimate with your payslip, statement or HMRC account.
- Check the assumptions and official sources listed on the calculator page.
- For an important decision, speak to payroll, HMRC or a regulated adviser.
Related pages
Read the terms and conditions for the limitation of liability, or contact us if you believe a calculator is incorrect.