Calculators
UK Tax Calculators for Accountants and Clients
Remindoo calculators give quick estimates for common UK tax questions. Each tool includes a tax-year label, last-updated date, worked example, FAQ and a soft route back into managing the client work inside Remindoo.
Choose a calculator
VAT Calculator UK
Working calculator with example and FAQs.
Self Employed Tax Calculator UK
Working calculator with example and FAQs.
Inheritance Tax Calculator UK
Full detail from the live Remindoo page is shown below.
Pension Tax Relief Calculator UK
Full detail from the live Remindoo page is shown below.
Tax Code Checker UK
Full detail from the live Remindoo page is shown below.
Business Rates Calculator UK
Full detail from the live Remindoo page is shown below.
Capital Gains Tax Calculator UK
Full detail from the live Remindoo page is shown below.
Student Loan Repayment Calculator UK
Full detail from the live Remindoo page is shown below.
Corporation Tax Calculator UK
Working calculator with example and FAQs.
Employer NIC Calculator UK
Full detail from the live Remindoo page is shown below.
Construction Industry Scheme Calculator UK
Full detail from the live Remindoo page is shown below.
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.
Why recording every task matters in an accountancy practice
Accounting firms run on deadlines: VAT returns, payroll, confirmation statements, accounts and Self Assessment. Recording every job as a task, with an owner and a date, is the simplest way to make sure nothing is missed.
Avoid penalties
HMRC and Companies House charge penalties for late filing. A task for every deadline, with an internal date before it, gives the team a buffer.
Nothing depends on memory
Recorded tasks mean work continues when someone is off sick, on leave or has left the firm.
Consistent quality
Subtask checklists make every job follow the same steps and reviews, whoever does the work.
Visibility for managers
Filters by owner, status and deadline show at a glance what is late, what is due and who needs help.
Practical tips from UK practice
- Set an internal deadline two to four weeks before every statutory deadline.
- Use recurring tasks for repeat work such as VAT, payroll and bookkeeping.
- Break larger jobs into subtasks, including a review step.
- Comment on the task instead of by email, so the history stays with the work.
Related Remindoo features
Written and reviewed by Annie, Product Lead at Remindoo. Guidance is general; check current GOV.UK and professional body guidance for your firm.
What UK practices say about Remindoo
Read all reviews on Trustpilot“With Remindoo, everything from the first enquiry to onboarding and ongoing client management is tracked in one place… It saves us hours and gives me, as a practice owner, complete visibility of where the firm stands.”
“The biggest benefit is having clients, tasks, deadlines, workflows, proposals and communication all organised in one place.”
“During my trial, the team were absolutely amazing. They helped onboard my clients, set up my settings and made sure everything was ready for me to use… they made the whole process completely stress-free.”
“It brings client information, tasks, recurring deadlines, workflows and reminders together in one place, giving us much better visibility across the team.”
