Calculator
Interest Rate Comparison
The same balance at five different rates — one year and five years out.
Results
Worked example
Balance compared$10,000
monthly compounding, rate held constant
Gap between 0.1% and 5.0%$501.61 in year one
same money, same insurance at banks — different rent paid to you
Rates float — treat these as comparison math, not quotes. The point survives any rate era: the branch-average account and the competitive account differ by real money on the same balance.
Insured is insured: FDIC/NCUA coverage doesn't care whether the rate is 0.1% or competitive.
| APY | Interest in 1 year | Balance after 5 years |
|---|---|---|
| 0.10% | $10.00 | $10,050 |
| 1.00% | $100.46 | $10,512 |
| 3.00% | $304.16 | $11,616 |
| 4.00% | $407.42 | $12,210 |
| 5.00% | $511.62 | $12,834 |