Millionaire Calculator
Time to reach £1,000,000.00
35 years, 7 months
Breakdown
Total Amount Contributed
£223,500.00
Total Interest / Growth Earned
£776,500.00
What is the Millionaire Calculator?
Millionaire Calculator is a free UK calculator using current HMRC rates for 2024/25, 2025/26 and 2026/27. It produces estimates only — for personalised advice consult a qualified accountant or tax adviser.
Last reviewed: against HMRC rates for 2024/25 & 2025/26.
Worked example
Enter the figures in the calculator above to see the result for your situation, then export or print the breakdown for your records.
Frequently asked questions
+Is this calculator free?
Yes. All calculators on UK Tax Tools are completely free, with no sign-up, no paywall, and no email collection.
+Are the figures accurate?
We update calculations against HMRC's published rates for 2024/25, 2025/26 and 2026/27. The output is an estimate for guidance only — for binding advice consult a qualified accountant.
+Does the calculator save my inputs?
No. Everything runs in your browser; nothing is sent to a server or stored. Refreshing the page resets the form.
+Can I print or export the result?
Yes — use your browser's Print menu (or the Print button where available). The page is styled for clean A4 printing.