We have designed a series of contractor calculators to help you calculate your tax liabilities.
The tools incorporate various factors, including IR35 and whether you work via your own limited company or an umbrella company.
They are based on MS Excel spreadsheets we use ourselves, and converted into web applications. Our ACA-qualified accountants have verified all calculations.
Salary and Dividend Tax Calculators
How much tax will you pay according to different levels of salary and dividends?
Typically, limited company owners remunerate themselves with lower salaries than ‘workers’ and draw down the remainder of their income as dividends.
- Dividend Tax Calculator (2025/26)
- 2024/25 Dividend Tax Calculator
- 2023/24 Dividend Tax Calculator
- 2022/23 Dividend Tax Calculator
IR35 Calculator
How will your take-home pay be affected if your contract work is caught by the Intermediaries Legislation (IR35)? This calculator compares your net take-home pay between inside and outside IR35 scenarios.
- Inside vs. Outside IR35 Calculator (2025/26)
Umbrella Company Net Take Home Pay Calculator
This tool calculates your net take-home pay after deducting employment costs from your assignment rate and personal tax from your gross pay. Has the option of including pension contributions deducted via salary sacrifice.
Limited Company Profit Calculator
After allowing for expenses and Corporation Tax (CT), how much money does your company make? The remaining ‘retained profit’ can be legitimately distributed to shareholders.
- Limited Company Tax Calculator (2025/26)
Corporation Tax Calculator
Calculate the CT your company will pay on its profits. CT rates rose significantly in April 2023.
- Corporation Tax Calculator (2025/26)
Sole Trader (Self Employed) Tax Calculator
Work out how much Income Tax and National Insurance Contributions (NICs) you pay on your sole trader profits.
- Self Employed Tax Calculator (2025/26)
Value Added Tax – VAT Calculator
This simple calculator calculates VAT-inclusive and VAT-exclusive sums at 20%, 5%, or zero rates.
Contractor Mortgage Calculator – How much can you borrow?
Most lenders use a similar formula to determine how much you can borrow as a contractor, based on your daily rate and a fixed multiple.
Mortgage Repayment Calculator
Work out how much your monthly payments are, and the lifetime cost of a loan, for repayment and interest-only mortgages.
Relevant Life Insurance Calculator
If you pay for life cover via your limited company vs. paying personally out of post-tax income, you can benefit from up to 50% tax savings.
- Relevant Life Calculator (2025/26)