Website overview
About Plain Sums
Plain Sums is a set of free UK calculators I built for people who just want the figure without wading through guidance. Subcontractors can check CIS deductions and estimate a refund, families can work out Inheritance Tax and probate figures including gifts, small businesses can calculate statutory late payment interest and compensation on an overdue invoice, and sole traders can see how close they are to the VAT threshold. Everything runs in your browser, so the numbers you type never leave your device. There are no adverts and nothing to sign up for. Each tool shows its working and links to the GOV.UK rule it uses, and the results are estimates for planning, not tax advice.
At a glance
Key features
- CIS deduction and refund estimator for subcontractors
- Inheritance Tax and probate calculator, including gifts
- Late payment interest and compensation calculator
- VAT threshold tracker for sole traders
- Runs in the browser, figures never leave your device
Practical details
What can you use this website for?
A subcontractor enters their CIS deductions and income for the year and gets an estimate of the refund they could claim, with the working shown.
Who is it for?
UK subcontractors, sole traders, small businesses and families sorting out an estate who want a quick, clear figure.
What to know
What makes it different?
No sign up, no adverts and no data sent anywhere. Each calculator shows its working and links to the GOV.UK rule behind it.
About this listing
Information about features, pricing and suitability is supplied by the submitter, not independently verified by Zearches. Websites are screened against submission and safety rules, but inclusion is not an endorsement.
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