Business calculators

Free calculators for limited company directors, sole traders and small business owners. Updated for 2026/27.

VAT calculator

Add or remove VAT from any amount and compare standard rates with the flat rate scheme.

Calculate how much corporation tax your limited company owes — including marginal relief.

Find the most tax-efficient way to pay yourself from your limited company.

Calculate monthly repayments, total interest and true cost of business borrowing.

Work out gross profit, net profit and margin from your revenue and expenses.

Estimate setup costs, monthly running costs and working capital for your new business.