Bank Interest Calculator Savings Account
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Reviewed by Calculator Editorial Team
Use our bank interest calculator to estimate how much you'll earn on your savings account over time. This tool helps you compare different interest rates, compounding methods, and time periods to make informed financial decisions.
How to Use This Calculator
To calculate your savings account interest:
- Enter the principal amount (initial deposit)
- Select the annual interest rate (APR or APY)
- Choose the compounding frequency (annually, monthly, daily)
- Enter the time period in years
- Click "Calculate" to see your estimated earnings
The calculator will show you the total amount after interest, the total interest earned, and a growth chart.
How Savings Interest Works
When you deposit money into a savings account, the bank typically pays you interest on that deposit. The interest rate is usually expressed as an annual percentage rate (APR).
There are two main types of interest:
- Simple interest: Calculated only on the original principal amount
- Compound interest: Calculated on the initial principal and also on the accumulated interest of previous periods
Most savings accounts use compound interest, which means your money grows faster over time.
Compound Interest Explained
Compound interest is calculated using the formula:
For example, if you deposit $1,000 at 5% annual interest compounded monthly for 10 years:
The more frequently interest is compounded, the higher your final amount will be.
Interest Rate Comparison
Here's a comparison of how different interest rates affect your savings over 10 years with monthly compounding:
| Principal ($) | 5% APY | 3% APY | 1% APY |
|---|---|---|---|
| $1,000 | $1,647.01 | $1,348.68 | $1,115.74 |
| $5,000 | $8,235.05 | $6,743.40 | $5,578.71 |
| $10,000 | $16,470.10 | $13,486.80 | $11,157.42 |
As you can see, even small differences in interest rates can significantly impact your savings over time.
Frequently Asked Questions
What's the difference between APR and APY?
APR (Annual Percentage Rate) is the simple annual interest rate, while APY (Annual Percentage Yield) includes the effect of compounding. APY is always higher than APR for the same interest rate when compounding is applied.
How often should interest be compounded?
The more frequently interest is compounded, the higher your final amount will be. Most savings accounts compound interest monthly, but some offer daily or even continuous compounding.
Is compound interest taxable?
Interest earned on savings accounts is generally tax-deferred, meaning you don't pay taxes on it until you withdraw the money. However, check with your tax advisor for specific rules in your jurisdiction.
What factors affect savings account interest rates?
Interest rates can be affected by the bank's policies, the current economic climate, your account balance (some banks offer higher rates for larger balances), and whether you're a new or existing customer.