Free Tax Calculators

At Remindoo, our free calculators are designed to help accountants, business owners, contractors, and growing firms estimate figures quickly and accurately. From payroll costs and profit margins to VAT, pricing, and business planning, our tools provide clear UK-focused calculations to support better decisions. Each calculator is built to save time, improve accuracy, and simplify everyday financial tasks. While calculators offer useful estimates, the Remindoo platform gives you complete control through task management, workflow automation, reporting, and practice management tools built for modern UK accounting firms.

VAT Calculator

VAT Calculator helps you quickly calculate Value Added Tax on any amount, whether you’re working out prices including VAT or excluding VAT.

Self Employed Calculator

Self Employed Calculator helps you quickly estimate your tax, National Insurance contributions, and take-home profit as a sole trader in the UK

Tax Code Checker

Tax Code Checker helps you quickly understand whether your UK tax code is correct and what it means for your pay.

Capital Gains Calculator

Capital Gains Calculator helps you quickly estimate how much Tax (CGT) you may need to pay when you sell assets like property, shares.

Inheritance Calculator

Inheritance Tax Calculator helps you estimate how much Inheritance Tax (IHT) may be due on an estate after someone passes away.

Student Loan Calculator

Student Loan Calculator helps you estimate how much you will repay on your student loan based on your income, loan plan type, and interest rate.

Corporation Tax Calculator

Corporation Tax Calculator helps you quickly estimate how much corporation tax your UK limited company needs to pay based on its profits.

Salary and Dividends Tax Calculator

Dividends Tax Calculator helps you quickly estimate how much tax you need to pay on dividend income from shares or a limited company.

Employer NIC Calculator

Employer NIC Calculator helps UK businesses quickly estimate how much Employer’s National Insurance Contributions (NICs) they need to pay for their employees.

CIS Calculator

CIS Calculator helps contractors and subcontractors in the UK quickly calculate Construction Industry Scheme (CIS) deductions from payments.

Business Rates Calculator

Business Rates Calculator helps UK business owners quickly estimate how much business rates (commercial property tax) they need to pay on shops, offices etc.

Stamp Duty Calculator

Stamp Duty Calculator helps you quickly estimate how much Stamp Duty Land Tax (SDLT) you will need to pay when buying property in the UK.

Rental Tax Calculator

Rental Income Calculator helps UK landlords quickly estimate their net rental profit after expenses and tax.

Property Tax Calculator

Property Tax Calculator helps UK property owners, landlords, and investors estimate the different taxes associated with property ownership, such as stamp duty, rental income tax, and capital gains tax.

Mortgage Calculator

Mortgage Calculator helps you quickly estimate your monthly mortgage repayments, total interest, and overall loan cost based on the property price, deposit, interest rate, and loan term.

Gross Profit Calculator

Gross Profit Calculator helps you quickly determine how much profit your business makes after subtracting the cost of goods sold (COGS) from total revenue.

Shared Ownership Calculator

Shared Ownership Calculator helps you estimate the total cost of buying a shared ownership property in the UK.