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.
- Income Tax CalculatorIncome Tax on your total income, band by band, including the allowance taper.
- VAT Scheme Comparison CalculatorCompare standard VAT accounting, cash accounting and the Flat Rate Scheme on your figures.
- Business Rates CalculatorEstimated 2026/27 business rates from your rateable value, with separate rules for each UK nation.
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.
- Commercial Lease Cost CalculatorThe real cost of premises once rates, service charge and fit-out are added to rent.
Employees
What an employee really costs once National Insurance and pension are added.
- Employee Cost & Employer NI CalculatorThe full annual cost of hiring, including employer National Insurance and pension.
- Holiday Entitlement CalculatorStatutory paid annual leave in days or hours, pro-rated for part years.
- Salary CalculatorTake-home pay after Income Tax, National Insurance, pension and student loan.
- Bonus vs Pension CalculatorCompare a cash bonus with the same employer budget paid into a pension.
- Redundancy Cost CalculatorStatutory redundancy pay, notice, holiday and the total cost of ending a role.
Banking, Payments & Finance
The everyday cost of banking, taking card payments and funding unpaid invoices.
- Business Bank Account Cost CalculatorAdd up monthly fees, transfers and cash deposits to see your real banking cost.
- Card Processing Fee CalculatorWhat card payments cost you each month, and what a different rate would cost.
- Invoice Factoring CalculatorThe annual cost of invoice finance and the cash it releases from unpaid invoices.
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.