Business
Self-employed and small-business UK calculators.
UK-applied calculators covering Corporation Tax (with marginal relief), IR35 inside-vs-outside take-home, profit margin vs markup, and the staples of running a small business.
- Profit marginGross / operating / net.
- Markup vs marginThe classic confusion.
- DiscountSale price + saving.
- Corporation Tax19% / 25% + marginal relief.
- IR35 take-homeInside vs outside comparison.
- Conversion rateE-commerce / leads.
- Customer churnMonthly + annualised.
- Gross profitRevenue − COGS.
- Break-evenFixed costs / margin.
- CommissionSales / property commission.
- Mileage allowanceHMRC AMAP 45p / 25p.