Make Smarter Money Decisions

See the numbers that matter with focused calculators and guides for personal finance, business, and online selling. Built for the UK — free, private, and browser-ready.

Money Tools →

Plan, calculate, and optimise your money with practical calculators.

Featured Guides


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Small Business Tools →

Calculate costs, margins, and taxes for running a small business.

Top Business Guides


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Online Seller Tools →

Calculate fees, optimise pricing, and protect your profits across multiple marketplaces.

Top Seller Guides


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Why use moneymargins?

No login or sign-up required

Runs entirely in your browser

Your data stays on your device

Fast, simple tools and guides


FAQs

Are the tools free?
Yes, all tools are free to use, with no account or login required. You can access them instantly in your browser.

Is my data saved?
No. All calculations run locally on your device. Your data never leaves your browser, ensuring complete privacy.

Will more tools be added?
Yes. New calculators and guides are regularly added across personal finance, small business, and online selling categories.