Free Online Financial Calculators for UK Businesses
Work out VAT, income tax, stamp duty, payroll and more in seconds. Every tool is free, needs no sign-up, and uses published HMRC rates for the 2026/27 tax year.
Popular Calculators
- Income Tax Calculator Calculate your UK income tax for 2026/27 across all rate bands.
- VAT Calculator Add or remove UK VAT at 20%, 5%, or 0% in seconds.
- Stamp Duty Calculator Calculate SDLT for residential purchases, including first-time buyer relief and additional dwelling surcharge.
- Emergency Fund Planner Calculate your ideal emergency fund target (3–6 months of expenses) and see how long it takes to reach it.
- ROAS Calculator Calculate return on ad spend to measure the effectiveness of your advertising.
- Risk vs Return Estimator Calculate the Sharpe ratio to measure risk-adjusted returns and classify investment risk level.
- Corporation Tax Calculator Calculate UK corporation tax at 19% or 25% with marginal relief for FY2026.
- National Insurance Calculator Calculate Class 1 (employee) or Class 4 (self-employed) NI contributions.
Add or remove VAT, check your registration threshold, and calculate Flat Rate Scheme savings — all using current HMRC rates.
- VAT Calculator Add or remove UK VAT at 20%, 5%, or 0% in seconds.
- Reverse VAT Calculator Extract the net amount and VAT from any gross (VAT-inclusive) figure.
- VAT Flat Rate Scheme Calculator Calculate your VAT liability and potential saving under the HMRC Flat Rate Scheme.
- VAT Registration Threshold Calculator Check whether your turnover is approaching the £90,000 VAT registration threshold.
- Import VAT Calculator Estimate the import VAT and customs duty payable on goods imported into the UK.
Estimate income tax, National Insurance, capital gains, and dividend tax for the 2026/27 UK tax year.
- Income Tax Calculator Calculate your UK income tax for 2026/27 across all rate bands.
- National Insurance Calculator Calculate Class 1 (employee) or Class 4 (self-employed) NI contributions.
- Capital Gains Tax Calculator Work out CGT on residential property or other assets for 2026/27.
- Dividend Tax Calculator Calculate the tax due on UK dividends above the £500 annual allowance.
- Self Assessment Tax Bill Calculator Estimate your total self-assessment bill including income tax, NI, and CGT.
Plan and run your business with tools for corporation tax, payroll, cash flow, loan repayments, and profit margins.
- Corporation Tax Calculator Calculate UK corporation tax at 19% or 25% with marginal relief for FY2026.
- Payroll Calculator Calculate employee take-home pay and total employer cost including NI.
- Profit Margin Calculator Calculate gross, operating, and net profit margins for your business.
- Business Loan Calculator Calculate monthly repayments and total interest on a business loan.
- Cash Flow Forecast Calculator Build a simple 12-month cash flow projection for your business.
Calculate stamp duty, mortgage repayments, rental yield, and potential savings from overpaying or remortgaging.
- Stamp Duty Calculator Calculate SDLT for residential purchases, including first-time buyer relief and additional dwelling surcharge.
- Mortgage Repayment Calculator Calculate your monthly mortgage payment and total cost over the term.
- Mortgage Overpayment Calculator See how much interest you save and how many years you cut by overpaying your mortgage.
- Buy-to-Let Yield Calculator Calculate gross and net rental yield on a buy-to-let property investment.
- Remortgage Savings Calculator Compare your current mortgage with a new deal and find your break-even point on fees.
Measure campaign efficiency with calculators for ROI, ROAS, customer acquisition cost, lifetime value, conversion rates, and churn.
- ROI Calculator Calculate return on investment and net profit for any business spend.
- ROAS Calculator Calculate return on ad spend to measure the effectiveness of your advertising.
- Customer Acquisition Cost Calculator Calculate CAC by channel to understand the true cost of acquiring a customer.
- Customer Lifetime Value Calculator Estimate gross and net LTV based on order value, purchase frequency, and lifespan.
- Conversion Rate Calculator Calculate your conversion rate and model the revenue impact of a rate improvement.
Build your financial safety net, pay off debt strategically, and harness the power of compound interest with our personal finance tools.
- Emergency Fund Planner Calculate your ideal emergency fund target (3–6 months of expenses) and see how long it takes to reach it.
- Debt Snowball vs Avalanche Calculator Compare the debt snowball and avalanche repayment strategies to see which saves the most interest and pays off debt fastest.
- Compound Interest Calculator (Savings) Calculate how a lump-sum savings deposit grows over time with compound interest and see your effective annual rate.
Simulate portfolio growth, assess risk-adjusted returns with the Sharpe ratio, and plan your long-term investment strategy.
Calculate statutory redundancy pay and understand your employment entitlements using the latest HMRC rates and rules.
Recently Added Tools
- Statutory Redundancy Calculator Calculate your UK statutory redundancy pay using the latest 2026/27 HMRC rates. Covers all age bands, service length cap, and the weekly pay limit.
- Cash Flow Forecast Calculator Build a simple 12-month cash flow projection for your business.
- Remortgage Savings Calculator Compare your current mortgage with a new deal and find your break-even point on fees.