Your money grows, but slowly — here's how much and why
A year ago you put $1,000 into a savings account. Today that account holds somewhere between $1,000 and $1,050, depending on the interest rate your bank offered and how often they added interest to your balance. The growth comes from interest — money the bank pays you for letting them use your deposit.
The reason the growth is modest is that savings account interest rates are low. Banks use your money to make loans to other customers, and they keep most of what those loans earn. What they pay you is a small fraction of that. Right now, savings accounts at large national banks typically pay between 0.01% and 0.05% per year, though some online banks pay closer to 4% or 5%. The difference between those rates matters more than you might think over time.
Key Takeaways
- At a typical large bank rate of 0.01% to 0.05%, your $1,000 grew by roughly $0.10 to $5 over the year.
- Online banks and credit unions often pay 4% to 5% annually, which would have grown your $1,000 to around $1,040 to $1,050 instead.
- Interest compounds, meaning you earn interest on your interest — the longer money sits, the more this effect builds.
- The rate your bank pays changes over time and varies by account type, so checking your statement shows you what you actually earned.
How the math works with different interest rates
Interest is usually described as an annual percentage rate, or APY. That percentage tells you what fraction of your balance the bank will add to your account over one year. If your bank paid 1% APY on $1,000, you would earn $10 in interest, leaving you with $1,010.
The actual calculation depends on how often the bank adds interest — daily, monthly, or quarterly. Most savings accounts compound interest daily, which means they calculate what you owe interest on each day, then add all of it at the end of the month. This compounds your growth: you earn interest on the interest from earlier in the month. Over a full year, daily compounding adds a tiny bit more than straightforward math would suggest, but the difference is small at low rates.
Here is what $1,000 would become at different rates over one year:
| Interest Rate (APY) | Interest Earned | Account Balance After One Year |
|---|---|---|
| 0.01% | $0.10 | $1,000.10 |
| 0.05% | $0.50 | $1,000.50 |
| 1% | $10.00 | $1,010.00 |
| 4% | $40.81 | $1,040.81 |
| 5% | $51.27 | $1,051.27 |
Why rates vary so much between banks
Large national banks — the ones with branches on every corner — typically pay the lowest rates. They have high overhead costs from maintaining physical locations and staff, so they pass less of their earnings to depositors. A Chase or Bank of America savings account might pay 0.01% while you keep your money there.
Online banks have no branches and far fewer employees, so their costs are lower. They can afford to pay more interest and still make a profit. Ally Bank, Marcus, and Discover Bank are examples of online banks that have historically paid rates closer to 4% or 5%, though these rates change when the Federal Reserve adjusts its benchmark interest rate.
Credit unions — member-owned financial institutions — sometimes pay competitive rates too, especially if you meet their membership requirements. Your employer, union, or community may have a credit union you can join.
Where to find out what your bank actually paid you
Your bank statement shows exactly how much interest you earned. Log into your online banking account or request a paper statement from your branch. Look for a line item labeled "Interest Paid" or "Interest Earned." This is the real number for your account, not an estimate.
If you have not checked your rate in a while, you can find it in your account details or by calling your bank's customer service line. The rate may have changed since you opened the account, especially if the Federal Reserve has raised or lowered its benchmark rate. Banks adjust their savings rates in response to these changes, though they do not always move them at the same speed.
How your choice of bank affects growth over longer periods
One year of difference between a 0.01% rate and a 5% rate looks small — about $50 on $1,000. But the gap widens dramatically over time because of compounding. After five years, $1,000 at 0.01% becomes $1,000.50, while $1,000 at 5% becomes $1,276. After ten years, the difference is even larger: $1,001 versus $1,629.
This is why choosing a bank with a higher rate matters more if you plan to keep money in savings for years rather than months. If you are saving for a down payment, an emergency fund, or a goal that is years away, moving your money to an online bank or credit union with a better rate can add hundreds of dollars to your balance without any effort on your part.
What happens to interest rates when the Federal Reserve makes changes
The Federal Reserve, the central bank of the United States, sets a benchmark interest rate that influences what all banks pay and charge. When the Fed raises its rate, banks eventually raise what they pay on savings accounts. When the Fed lowers its rate, savings rates fall too — sometimes quickly, sometimes slowly.
Your bank is not required to pass along the full change to you. A bank might raise its savings rate by 0.25% when the Fed moves, or it might raise it by 0.10%. This is why it pays to shop around: some banks respond faster and more generously than others. If your bank has not raised its rate in a while but other banks have, you can move your money without penalty — savings accounts have no lock-in period.
Frequently Asked Questions
Do I have to pay taxes on the interest I earned?
Yes. Interest counts as income to the IRS. Your bank will send you a 1099-INT form at tax time if you earned $10 or more in interest during the year. You report this on your tax return. At the low rates most banks pay, the tax impact is small, but it is real.
Can I move my money to a higher-rate bank without losing the interest I already earned?
Yes. Interest you have already earned belongs to you. When you move money to a new bank, you keep what you have already made. You will not earn interest from the old bank after you withdraw, but nothing you earned before the withdrawal goes away.
What if I withdraw some of the money during the year — do I lose interest?
No. You earn interest on whatever balance you hold each day. If you had $1,000 for six months and $500 for the other six months, the bank calculates interest on both periods separately. Withdrawals do not erase interest you have already earned.
Is there a difference between a savings account and a money market account for interest?
Money market accounts sometimes pay slightly higher rates than savings accounts, but the difference is usually small. Both are safe, FDIC-insured accounts. The main difference is that money market accounts may have higher minimum balances or limit how many withdrawals you can make per month.
Why do online banks pay so much more than big banks?
Online banks have lower costs because they have no physical branches or tellers. They can afford to pay more interest and still be profitable. They make money from loans and fees, just like traditional banks, but they do not have to cover the expense of maintaining hundreds of locations.