Financial Tools
Free calculators built for UK businesses: pricing and margins, cash and runway, hiring costs, tax, VAT and energy. Every tool runs in your browser, uses current UK rates where they matter, and explains the maths behind the answer.
- Financial Tools
Capital Gains Tax Calculator
CGT due after the annual exempt amount, losses and your income, at the 18%/24% or Business Asset Disposal Relief rate.
Open calculator - Financial Tools
Compound Interest Calculator
Growth of savings or investments with compounding and optional monthly top-ups.
Open calculator - Financial Tools
Debt-to-Income (DTI) Ratio Calculator
DTI ratio from monthly repayments and income, with the lender view and the reduction needed for a healthy ratio.
Open calculator - Financial Tools New
Late Payment Interest Calculator
Statutory interest at 8% over base rate plus the fixed compensation fee, from the invoice amount and dates.
Open calculator - Financial Tools
Profit Margin Calculator
Gross and net profit margin plus markup, with a cost breakdown.
Open calculator - Financial Tools
ROI (Return on Investment) Calculator
Total and annualised return on investment from what you put in and what came back.
Open calculator
No tools match that search. Try a different word, or clear the filter.
How these tools are built
Current UK rates
Tax, National Insurance, VAT and Capital Gains figures are the 2026/27 rates and were last reviewed on 2nd September 2026. The review date is printed on every calculator that depends on them.
Nothing is stored
Every calculation happens in your browser. We never see or keep the numbers you type. Share a result by copying the link, which carries your inputs in the address bar only.
The maths is shown
Each tool shows the formula, a worked example and the assumptions it makes, so you can check the result or reproduce it in your own spreadsheet.
UK tax rates and thresholds 2026/27
The figures behind the calculators, with what changed this year and the full tables. Updated automatically.
- Capital Gains Tax£3,000Annual exempt amountCapital Gains Tax rates and allowance 2026/27
- Corporation Tax19%Profits up to £50,000Corporation Tax rates and marginal relief 2026/27
- Dividend tax£500Dividend allowanceDividend tax rates and allowance 2026/27
- Income tax£12,570Personal allowanceIncome tax rates and bands 2026/27
- National Insurance8%Employee main rateNational Insurance rates and thresholds 2026/27
- Late payment interest11.75%Statutory rate nowStatutory late payment interest rate and compensation
- Student loans£29,385Plan 2 thresholdStudent loan repayment thresholds 2026/27
- VAT£90,000Registration thresholdVAT registration threshold and rates 2026/27