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The guides, terms and calculators that explain money: how it works, how it is worked out, and where people usually get it wrong.

This week’s read

Real return: why the rate on your savings is not what you earn

If one savings account pays 20% a year and another pays 4%, do you know which one pays better? Most people answer in under a second, and most people are wrong.

Guide · Updated 19 September 2026

Read the working
Personal finance · Featured tool What is my return after inflation? 1.94% After 5 years your bank statement says 12,763, and it buys what 11,009 buys today. Run your numbers

The library, by question

All 14 tools
Personal finance · Featured tool Where does my monthly saving land? 94,111 After 10 years the balance is 94,111. Run your numbers Investing · Featured tool How long until my money doubles? 11.9 years At 6.0% a year 50,000 doubles in 11.9 years. Run your numbers Financial products · Featured tool What will this instalment plan really cost? 3,600 2,000 down and 900 a month for 24 months comes to 23,600, which is 3,600 above the cash price of 20,000 and costs the same as borrowing it at 18.16% a year. Run your numbers

The reading ladders

Personal finance

What your money does before any of it is invested: what comes in, what leaves, and what is still standing at the end of the month.

Everything in this theme

Start here

Compound interest: what it is, and how long it takes to matter What inflation is, and why your money buys less every year How to build a budget

How it works

Real return: why the rate on your savings is not what you earn How inflation hits your money differently depending on where you keep it Compound interest in two currencies: the same rate is a gain in one and a loss in the other What your raise is actually worth: the break-even number nobody says out loud

What to do about it

How to build a budget when your income varies Does the fifty-thirty-twenty rule work here? The emergency-fund rule: what three to six months actually has to cover

Tools in this theme

Tool Where does my monthly saving land? Tool How big should my emergency fund be? Tool What is my end-of-service worth? Tool What am I actually worth? Tool What is my return after inflation? Tool When will I have enough? Tool What is my raise actually worth? Tool How much zakat do I owe?
All 8 in Personal finance

Just published

Guide Compound interest: what it is, and how long it takes to matter Guide How inflation hits your money differently depending on where you keep it Guide What investing actually is Guide What inflation is, and why your money buys less every year Guide How to build a budget when your income varies Guide How to build a budget
60 terms, one sentence each Open the glossary