Explain · Like I'm five version
Credit card interest in terms of a gym membership you forgot to cancel
Credit card interest is just like a gym membership you signed up for but never actually went to use.
When you borrow money from a bank, they charge you a little extra fee each month for the privilege of keeping that loan open. It is exactly like that time you signed up for a spinning class in January, decided you preferred biscuits, and then watched the bank take twenty pounds from your account every single month while your fancy trainers gathered dust under the bed. You are not getting any fitter, but the gym is certainly getting richer.
If you only pay a tiny bit of your bill, the bank adds even more interest on top of what you already owe. This is just like the gym adding a late fee because you forgot to update your payment card, followed by a charge for not showing up to the pilates session you booked. The debt grows just like the pile of unread exercise magazines in your hallway, becoming much larger and scarier every time you ignore it.
The best way to stop the bank from taking your pocket money is to pay the full amount back as soon as you can. It is just like finally marching into the gym reception to sign a piece of paper that cancels your membership for good. Once you stop the payments, the bank stops adding those extra fees, and you are free to spend your pennies on something much more fun, like a packet of stickers or a very large ice cream.
Where the analogy breaks downA gym does not usually let you pay back your membership fee in smaller, manageable chunks over several years.