World 1 · Money foundations · Lesson 8 of 10

How banks work

What a bank actually does with your deposit, and why your balance is a promise rather than a pile of cash.

7 min read · Level: Foundation · Free — no account needed to read

The idea

When you put money in a bank, the bank does not keep your cash in a drawer with your name on it. Your balance becomes a promise: the bank owes you that amount and must pay it back when you ask. Meanwhile it lends much of what it holds to other people and businesses, and charges them interest.

A bank earns money mainly from the gap between the interest it charges borrowers and the interest it pays savers, plus fees. It keeps only part of its deposits ready for withdrawals, relying on the fact that not everyone asks for their money at once. Regulators require banks to hold reserves and capital to reduce the chance of failure.

In many countries, deposits up to a certain limit are protected by a government scheme if a licensed bank fails. Limits and rules differ from place to place, so it is worth knowing how your deposits are protected — and whether the place holding your money is a licensed bank at all.

Why it matters

Understanding banks helps you choose where to keep your money, notice what fees and interest are really doing, and tell the difference between a licensed bank and an app or scheme that only looks like one.

A real example

The situation

Hana opens a savings account and is surprised it pays so little interest, while a loan from the same bank would cost her much more.

What happened

She learns that the gap between the two rates is how the bank earns its living. She compares a few licensed banks and moves to one that pays more on savings and charges no monthly fee.

The takeaway

A deposit is, in effect, a loan to the bank; it is worth knowing what the bank pays you for it and how it is protected.

How people actually behave

Most people picture their balance as physical money stored safely, and rarely compare banks once they have an account. Inertia means many keep paying fees or accepting low interest for years without noticing.

Common mistakes

• Assuming every app that holds money is a bank with deposit protection.
• Never comparing your account’s fees and interest with the alternatives.
• Keeping very large sums in one place above the protected limit without knowing the rules.

Questions to think about

• Do you know how your deposits are protected where you live?
• What does your bank charge you each year, and what does it pay you?

Try it: Know your bank

1. Look up the fees on your main account and the interest it pays.
2. Check that your bank is licensed, and how deposits are protected in your country.
3. Compare it with one alternative before deciding whether to stay.

Words in this lesson

• Bank — A licensed institution that holds deposits, makes loans and moves money between people and businesses.
• Deposit — Money placed with a bank, which the bank owes back to you.
• Interest — The price of borrowing money, or the reward for lending or saving it, usually a percentage per year.
• Deposit insurance — A scheme in many countries that protects bank deposits up to a limit if a licensed bank fails.