Startup Calculator
How many months of operating costs do you want covered?
Recommended: 15–25% for unexpected costs.
Results
One-Off Startup Costs
£6,550.00
Monthly Running Costs
£4,750.00 / month
Break-Even Monthly Revenue Needed
£4,750.00
Contingency Buffer
£7,010.00
What is the Startup Costs Calculator?
Startup Costs 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.