SIC code finder tool for UK limited companies
Use our free SIC Code Finder to search Companies House SIC codes by business activity or code. Always verify your chosen code before filing.
Calculators & Tools
Our calculators and tools are designed to help limited company directors work through common tax and business questions quickly.
Use them to estimate tax liabilities, compare different options and find information such as SIC codes. They are intended as a starting point, so check the underlying rules before relying on a result for a filing or financial decision.
Stock transfer stamp duty calculator
Calculate the Stamp Duty payable on a UK Stock Transfer Form, including the 0.5% rate, £5 rounding rule and £1,000 Certificate 1 limit.
Limited company BADR calculator (2026/27)
Estimate the Capital Gains Tax due when you sell or close your limited company, incl. the 18% Business Asset Disposal Relief rate and £1m lifetime limit.
Company pension contribution tax savings calculator
The company pension contribution calculator estimates the Corporation Tax saving and effective cost of paying into a pension from your limited company.
Director’s loan calculator – section 455 tax & repayment deadline
Use our Director’s Loan Calculator to estimate Section 455 tax, check your repayment deadline and see what happens if you repay the loan late.
Limited company profits calculator (2026/27)
Use our limited company profits calculator to work out how much Corporation Tax to pay after allowing for deductions for expenses during 2026/27.
Relevant life insurance calculator for limited company directors
Relevant life insurance calculator for limited company directors. Estimate potential savings if premiums are paid by the company, not from post-tax income.
£100,000–£125,140 tax trap calculator (2026/27)
This calculator shows how the £100,000–£125,140 Personal Allowance taper works and why it can result in an effective marginal tax rate of up to 60%.
Corporation tax marginal relief and associated companies calculator
Estimate Corporation Tax using marginal relief rules, including the impact of associated companies on thresholds and effective tax rates (2026/27 tax year).
Limited company dividend tax calculator (2026/27)
Use this dividend calculator to work out how much tax you will pay on any combination of salary and dividends during 2026/27 as a company director.