Calculators for UK Small Business Owners

Running a small UK company means juggling several taxes at once, and getting the structure right can save thousands. Corporation tax applies to your profits at 19% up to £50,000 and 25% above £250,000, with marginal relief in between — and those limits are shared across associated companies. As a director, how you pay yourself matters: a tax-efficient mix of a modest salary and dividends usually beats salary alone, which the dividend-versus-salary calculator makes easy to compare. Once taxable turnover passes the £90,000 VAT threshold you must register, and choosing between standard VAT and the flat-rate scheme affects both admin and cost. If you employ staff, the Employment Allowance can reduce your employer National Insurance bill, and you will need to run payroll. With Making Tax Digital expanding and corporation tax rates higher than a few years ago, modelling decisions before you make them is essential. These calculators help you plan profit extraction, manage VAT and payroll, and keep more of what your business earns — all using current 2025/26 rates.