Free tools

Free tools that get jobs off the spreadsheet.

Quick answer

Free UK business calculators and tools: VAT, corporation tax, take home pay, employer National Insurance, IR35, holiday entitlement, late payment interest, break-even, invoicing and Making Tax Digital.

Working calculators and small apps for UK businesses: VAT, tax, payroll, holiday, late payment and software costs. Free to use with no sign-up. Each tax tool shows its working, states its assumptions and links to the official GOV.UK source for every rate.

Free tool

VAT Calculator

Add or remove VAT at 20%, 5%, 0% or a rate you type in, with the net, VAT and gross shown.

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Free tool

VAT Threshold Calculator

Check your rolling 12 month turnover against the £90,000 registration threshold.

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Free tool

Corporation Tax Calculator

Corporation tax on company profit, with marginal relief and associated companies worked through step by step.

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Free tool

IR35 Calculator

Compare take home pay from a day rate inside IR35, outside IR35 and as a permanent salary. It does not assess IR35 status.

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Free tool

Sole Trader vs Limited Company Calculator

Compare take-home pay on the same profit as a sole trader and through a limited company.

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Free tool

Take Home Pay Calculator

Salary after income tax, National Insurance and pension, by year, month and week. England, Wales and Northern Ireland rates.

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Free tool

Employer's National Insurance Calculator

Employer National Insurance per employee, the Employment Allowance and the full cost of one more hire.

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Free tool

Payments on Account Calculator

Your Self Assessment bill, the 31 January and 31 July payments for two years, and how much to set aside.

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Free tool

HMRC Penalty Points Calculator

Late submission penalty points and £200 penalties for VAT returns and Making Tax Digital for Income Tax.

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Free tool

Holiday Entitlement Calculator

Statutory annual leave for full time, part time and irregular hours staff, plus starters and leavers.

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Free tool

Late Payment Interest Calculator

Statutory interest at 8% over the Bank of England base rate, plus fixed compensation, on an overdue business invoice.

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Free tool

Debtor Days Calculator

How long customers take to pay, the cash tied up beyond your terms and what it costs to fund.

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Free tool

Break-Even Calculator

Break-even point in units and revenue from fixed costs, price and variable cost, with margin of safety.

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Free tool

Invoice Chaser

Track unpaid invoices in your browser and export calendar reminders with the chase email written.

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Free tool

Power BI Licence Cost Planner

Compare Power BI Pro, Premium Per User and Fabric capacity costs for your number of users.

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Free tool

Power Automate Licence Cost Planner

Compare Premium per-user, Process and Azure pay-as-you-go costs and see where each becomes cheapest.

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Free tool

Cloud Waste Calculator

List cloud resources and how much of the time each is needed to estimate idle spend.

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Free tool

MTD Bridge Tool

Prepare Making Tax Digital quarterly summaries from an Excel spreadsheet.

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Free tool

CAB Tracker

A simple change advisory board: log changes, owners and priorities and write an end-of-day digest.

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Free tool

The Replace-It Calculator

What a manual job or software subscription costs a year, and what replacing it would have to cost to pay back.

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Digital Adaption also helps UK firms with reporting and data migration.