Economics
Savings Accounts
Quick fact
In 2022, the average savings account interest rate in the U.S. was below 0.05%, but some high-yield accounts offered over 4%—that's an 80-times difference.
Why this is interesting
You put money in a savings account and it earns a little extra each year, but have you ever wondered who decides that extra amount and where the money comes from?
Read the full explanation
Understanding Savings Accounts
A savings account is like a safe place to keep your money that also pays you a small reward for letting the bank hold it. When you deposit money, the bank uses it to lend to others, charging them a higher interest rate. The bank then shares a portion of that profit with you as interest on your savings. The principal is the original amount you deposited. The interest rate tells you how much extra you earn per year. With compound interest, you earn interest on your interest, making your money grow faster over time. Most savings accounts are insured by the government (like FDIC in the U.S.) up to a certain limit, so your money is safe even if the bank fails.
A deeper explanation
The mechanism behind savings accounts lies in fractional-reserve banking. Banks are required to keep only a fraction of deposits as reserves, lending the rest out to borrowers. The interest they earn from loans is their revenue, from which they pay depositors interest. This creates a cycle: your savings become loans that fuel economic activity, and you get a small return. The real power of a savings account comes from compounding—the more frequently interest is calculated and added to the principal, the faster your balance grows. Savings accounts also offer liquidity (you can withdraw funds at any time), making them ideal for emergency funds. Understanding which accounts offer higher APY, and how fees can eat into earnings, empowers you to make smarter saving decisions.