Bank Interest on Savings Account Calculator
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Reviewed by Calculator Editorial Team
Calculate how much interest you'll earn on your savings account with our bank interest calculator. Simply enter your principal amount, interest rate, and time period to see your estimated earnings.
How to Use This Calculator
Using our bank interest calculator is simple:
- Enter the principal amount (the initial deposit or balance in your savings account)
- Input the annual interest rate (APR or APY)
- Select whether the rate is APR or APY
- Choose the compounding frequency (daily, monthly, quarterly, annually)
- Enter the time period in years
- Click "Calculate" to see your results
The calculator will display your total interest earned and the final amount in your account after the specified time period.
Formula Used
The bank interest calculator uses the compound interest formula:
A = P(1 + r/n)nt
Where:
- A = the future value of the investment/loan, including interest
- P = the principal investment amount (the initial deposit or loan amount)
- r = the annual interest rate (decimal)
- n = the number of times that interest is compounded per year
- t = the time the money is invested or borrowed for, in years
For APR (Annual Percentage Rate), the formula is used directly. For APY (Annual Percentage Yield), the effective annual rate is calculated first.
Worked Example
Let's calculate the interest earned on $1,000 at 3% annual interest compounded monthly for 2 years.
A = 1000(1 + 0.03/12)12×2
A = 1000(1 + 0.0025)24
A ≈ 1061.68
Total interest earned = $61.68
This means you would earn approximately $61.68 in interest over 2 years with this investment.
Interest Rate Comparison
Compare how different interest rates affect your savings over time:
| Principal ($) | Rate (%) | Time (years) | Monthly Compounding | Final Amount |
|---|---|---|---|---|
| 1,000 | 1.00 | 5 | $1,051.27 | $1,051.27 |
| 1,000 | 2.00 | 5 | $1,104.08 | $1,104.08 |
| 1,000 | 3.00 | 5 | $1,159.27 | $1,159.27 |
| 1,000 | 4.00 | 5 | $1,216.82 | $1,216.82 |
| 1,000 | 5.00 | 5 | $1,276.82 | $1,276.82 |
This table shows how a $1,000 investment grows over 5 years with different interest rates, assuming monthly compounding.
Frequently Asked Questions
- What is the difference between APR and APY?
- APR (Annual Percentage Rate) is the simple annual interest rate, while APY (Annual Percentage Yield) is the effective annual rate that takes into account compounding interest.
- How often should interest be compounded?
- Most savings accounts compound interest daily, monthly, or annually. The more frequently interest is compounded, the higher your earnings will be.
- Is the interest I earn taxable?
- In most cases, interest earned on savings accounts is taxable as ordinary income. However, some accounts may offer tax-exempt status or tax-advantaged features.
- Can I withdraw money from my savings account without penalty?
- This depends on the specific terms of your savings account. Some accounts allow unlimited withdrawals, while others may have restrictions or penalties for early withdrawals.
- How can I increase the interest I earn on my savings?
- To maximize your savings interest, consider opening a high-yield savings account, taking advantage of bonus rates, or using the money market account features.