Practical tools for UK business owners, landlords, sole traders, directors, and individuals who want clearer numbers and fewer tax mistakes.
Use the right tool for your situation, then get expert support if you need more than a calculator.
Built by RR Accountants for real tax, accounting, and compliance decisions.
Tell us what you want to know. We will point you to the right tool.
If you want to know…
What you actually keep after tax
If you want to know…
Whether salary or dividends are better
If you want to know…
How much tax your side income creates
If you want to know…
How much self-assessment tax you may owe
If you want to know…
How much company tax you may owe
If you want to know…
Whether a VAT number is registered
If you want to know…
Which SIC code fits your business
If you want to know…
Whether MTD for Income Tax affects you
If you want to know…
Whether to stay sole trader or go limited
If you want to know…
How much capital gains tax you may owe
If you want to know…
Which deadlines apply to you
If you want to know…
Whether an expense is tax-deductible
Estimate what you keep after tax, NI, pension, student loan, and dividends where relevant.
Best for: Employees, sole traders, individuals
Estimate likely self-assessment tax, National Insurance, and payment-on-account exposure.
Best for: Sole traders, landlords, individuals
Compare director remuneration strategies and estimate which structure may be more tax-efficient.
Best for: Directors, limited company owners, contractors
Estimate corporation tax liability based on your company's taxable profit and marginal relief.
Best for: Limited companies, directors
Check whether a UK VAT number is registered and view the linked business details.
Best for: Businesses checking suppliers or clients
Check whether Making Tax Digital for Income Tax is likely to affect you and how ready you are.
Best for: Sole traders, landlords
Estimate what you keep after tax, NI, pension, student loan, and dividends where relevant.
Best for: Employees, sole traders, individuals
Estimate total tax exposure when you have both employment income and self-employment or rental income.
Best for: Side-income earners, landlords with day jobs
Estimate likely self-assessment tax, National Insurance, and payment-on-account exposure.
Best for: Sole traders, landlords, individuals
Estimate capital gains tax on property disposals, shares, or other chargeable assets.
Best for: Landlords, property investors, individuals
Compare director remuneration strategies and estimate which structure may be more tax-efficient.
Best for: Directors, limited company owners, contractors
Estimate corporation tax liability based on your company's taxable profit and marginal relief.
Best for: Limited companies, directors
Compare the tax, admin, and compliance implications of operating as a sole trader or limited company.
Best for: Sole traders, new business owners
Find likely SIC code matches based on your business activity and description.
Best for: New companies, company formation
Calculate VAT-inclusive or VAT-exclusive amounts at standard, reduced, or zero rates.
Best for: All VAT-registered businesses
Check whether a UK VAT number is registered and view the linked business details.
Best for: Businesses checking suppliers or clients
Check whether Making Tax Digital for Income Tax is likely to affect you and how ready you are.
Best for: Sole traders, landlords
Create professional invoices with automatic calculations, then download as PDF.
Best for: Sole traders, freelancers, small businesses
Calculate selling prices, margins, and markups to make profitable pricing decisions.
Best for: Small business owners, product sellers
Check whether a business expense is likely to be tax-deductible based on HMRC rules.
Best for: Sole traders, directors, landlords
View key HMRC and Companies House deadlines and filter what applies to your situation.
Best for: All UK taxpayers and business owners
Tools for individuals, side-income earners, and taxpayers who want clearer visibility on what they owe or keep.
Tools for directors, company owners, and founders making structure, profit, and remuneration decisions.
Tools for VAT checks, compliance readiness, supplier due diligence, and digital tax obligations.
Tools for invoicing, pricing, expenses, and practical financial planning.
Our tools are built around real UK tax, accounting, and compliance decisions.
Get useful numbers fast, then know what to do next.
Designed for sole traders, directors, landlords, business owners, and mixed-income taxpayers.
When the answer is not straightforward, RR Accountants can help you go further.
RR Accountants helps businesses and individuals with bookkeeping, tax planning, VAT, payroll, accounts, company setup, and ongoing compliance — when the answer needs more than a quick estimate.
RR Accountants supports UK businesses and individuals with tax, bookkeeping, payroll, VAT, accounts, business setup, and practical compliance advice.