How does compound interest affect savings and loans?

Compound interest is when your money grows or gets bigger by earning more money on top of what you already have, like a snowball rolling down a hill and getting bigger with every step.

Imagine you have a piggy bank where your allowance goes. Every month, the piggy bank gives you extra coins for saving, not just from your allowance, but also from the extra coins it gave you before. That’s compound interest in action!

When you save money with compound interest, it's like having a friend who helps you collect more coins each time. Let’s say you start with $100, and every year your piggy bank gives you 10% extra, that means after one year, you’ll have $110. The next year, the piggy bank will give you 10% of $110, so now you'll have $121. It keeps growing faster and faster!

Now imagine borrowing money from a friend to buy candy. If you owe them compound interest, it’s like they’re saying, “You need to pay back not just what you borrowed, but also the extra bits I added each time.” That means your debt can grow quicker if you don’t pay it off soon.

So whether you're saving or borrowing, compound interest makes things either better or bigger, depending on which side of the piggy bank you’re on!