Bank Interest Comparison Calculator
Compare up to three savings, HYSA, CD or deposit offers using APY, contributions, account fees, bonuses and ending balance.
What this comparison shows
See which account produces the highest modeled ending balance and how much comes from deposits, interest, bonuses and fees.
Important limitation
Promotional APYs, withdrawal penalties and minimum balance requirements are not automatically modeled.
How to compare savings rates
APY is useful because it incorporates the effect of compounding, but the highest advertised APY may not create the highest ending balance after fees, promotional periods or account requirements. This calculator models contributions, fees and bonuses alongside the rate.
Look beyond APY
Check minimum balances, withdrawal restrictions, promotional expiration dates, CD early-withdrawal penalties and whether a bonus has deposit or holding-period requirements.
What the result means
Interest earned is the modeled growth attributable to the rate. Ending balance also reflects your starting deposit, modeled contributions, fees and bonus assumptions.
What this calculator answers
The Bank Interest Comparison Calculator uses the requested values to calculate the requested result. The core method is Periodic compounding with optional monthly contributions and account fees.. This makes the assumptions visible so you can check whether the inputs match your situation.
How to get a useful result
Use the rate, time period, fees and cash-flow assumptions that match the real quote or account you are evaluating.
How to interpret it
Treat the result as an estimate. Taxes, lender rules, compounding conventions, fees and timing can change the real amount.
Before relying on the number
Recheck unusual inputs, confirm units and compare the result with any official quote, statement, specification or rule that applies to the real decision. Small changes in rates, time periods or measurements can materially change some results.
Want to compare real options?
Zelvaniq helps you calculate the numbers. Compare Expert helps you compare products, services, plans and total cost side by side before you choose.