All calculators
Twenty free calculators covering the numbers most UK small businesses need to work out. No sign-up, no email capture, and the workings are shown on every page.
Tax & Company
VAT, Corporation Tax, and how you pay yourself from a limited company.
- VAT CalculatorAdd VAT to a net price or remove VAT from a VAT-inclusive price.
- Corporation Tax CalculatorCompany tax on your profits, including Marginal Relief between £50,000 and £250,000.
- Salary vs Dividend CalculatorCompare how much you keep from different salary and dividend combinations.
- Sole Trader vs Limited Company CalculatorEstimated take-home from the same profit as a sole trader or through a company.
- Late Payment Interest CalculatorStatutory interest and fixed compensation on an overdue commercial invoice.
- Day Rate to Salary CalculatorTurn a contract day rate into an approximate annual salary equivalent.
- Dividend Tax CalculatorIncome Tax on your dividends once salary, allowances and tax bands are applied.
- VAT Registration Threshold CalculatorTrack rolling 12-month taxable turnover against the £90,000 registration threshold.
- CIS Deduction CalculatorConstruction Industry Scheme deductions on labour, with VAT and materials excluded.
Pricing & Profit
Work out what to charge, what you keep, and how much you need to sell.
- Gross Margin & Markup CalculatorMargin, markup and profit per unit — plus the price you need for a target margin.
- Break-Even CalculatorHow many units you need to sell to cover your costs, and to hit a profit target.
- Cash Flow Runway CalculatorHow many months your cash lasts at your current rate of spending.
Employees
What an employee really costs once National Insurance and pension are added.
Banking & Payments
The everyday cost of banking and taking card payments.
Travel & Expenses
Mileage, mileage relief, company car fuel rates and the cost of running a vehicle.
- HMRC Business Mileage CalculatorApproved mileage for your own car, van, motorcycle or bicycle at HMRC rates.
- Mileage Allowance Relief CalculatorTax relief you can claim when your employer pays less than the approved rate.
- Company Car Advisory Fuel Rate CalculatorCompany car fuel reimbursement using HMRC's quarterly advisory fuel rates.
- Fuel Cost Per Mile CalculatorWhat fuel actually costs you per mile from your MPG and pump price.