FREE VERESTLY TOOL
APY Comparison Calculator
Compare savings accounts side by side and see how different APYs can affect your interest earned, ending balance, and overall savings growth.
A higher APY generally helps your money grow faster, but the difference becomes easier to understand when you convert the percentage into actual dollars. This calculator shows that difference for you.
No sign-up required. Your calculations stay in your browser.
Higher projected interest
Lower projected interest
HOW IT WORKS
Compare APYs Using the Same Savings Plan
The calculator keeps your deposit amount, monthly savings, and time horizon the same across each account. That makes it easier to see how APY and recurring fees can change your estimated results.
Enter Your Savings Plan
Start with the amount you already have available, how much you plan to add each month, and how long you expect to keep the money saved.
Add the Accounts You Want to Compare
Enter the advertised APY for each account. You can also include a recurring monthly fee so the comparison reflects more than just the headline interest rate.
See the Difference in Dollars
The calculator estimates your interest earned, ending balance, fees, and net earnings for each account using the same assumptions.
The annual percentage yield entered for each account.
Estimated interest generated over your selected period.
Estimated recurring monthly fees over the comparison period.
Your projected balance after contributions, growth, and fees.
SIMPLE EXAMPLE
A Small APY Difference Can Add Up
Imagine you compare two savings accounts using the same starting balance, the same monthly deposits, and the same time period. One account pays 4.25% APY and the other pays 3.50% APY.
The calculator translates that percentage difference into estimated dollars so you can see how much the higher APY may actually be worth.
READY TO COMPARE?
Enter Your Numbers and See the Difference
INTERACTIVE CALCULATOR
Compare Savings Accounts Side by Side
Enter your savings plan once, then add the APY and monthly fee for each account you want to compare.
YOUR SAVINGS PLAN
Enter Your Numbers
ACCOUNTS
Add APYs to Compare
COMPARISON RESULTS
Estimated Account Growth
Estimates assume the entered APY remains unchanged and that monthly contributions are made at the end of each month. Actual interest and account results may vary based on bank calculation methods, changing rates, fees, balance requirements, and account terms.
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MONTHLY PLAN
Example month
Illustrative example only
WANT TO UNDERSTAND THE COST OF THE BALANCE?
Review how credit card interest works before deciding how much additional cash to direct toward the balance.
YOUR RESULTS
How to Read Your APY Comparison
The best account is not always the one with the highest advertised APY. Your projected balance depends on the APY, recurring fees, how much you deposit, and how long your money stays in the account.
START HERE
Compare the Ending Balance
Your estimated ending balance shows how much money may be in the account after your starting deposit, monthly contributions, estimated interest, and recurring fees.
THEN CHECK
Look at Interest Earned
Interest earned isolates how much growth the APY may generate before account fees. This helps you see the dollar impact of one APY compared with another.
DO NOT IGNORE
Subtract Recurring Fees
A monthly maintenance fee can erase part of the advantage created by a higher APY, especially when your account balance is still relatively small.
THE MAIN IDEA
Highest APY and Best Result Are Not Always the Same
APY tells you how quickly money can grow over a year when compounding is included. But APY alone does not account for monthly maintenance fees or other account costs.
If two accounts have similar APYs, even a modest recurring fee can change which account produces the higher estimated ending balance.
Compare the final dollar result, not just the headline rate.
RESULT CHECKLIST
Before You Decide, Check These Four Numbers
How much annual yield the account currently offers.
Estimated dollar growth generated by the entered APY.
Costs that may reduce the value of a higher rate.
The projected dollar result after growth and fees.
IMPORTANT
APYs Can Change
Savings-account APYs are often variable. The rate you see today may increase or decrease later, so treat calculator results as estimates rather than guaranteed returns.
NEXT STEP
Compare More Than the Interest Rate
Once you understand the projected growth, look at the account requirements and features that can affect whether the account actually works for you.
BEYOND THE RATE
What Else Should You Compare Besides APY?
A competitive APY can be attractive, but the account still needs to fit how you save, access your money, and avoid fees. Compare the full account structure before making a decision.
COST
Monthly Fees
A recurring maintenance fee can reduce or even erase the extra interest you earn from a higher APY.
Ask: Can the fee be avoided?BALANCE
Minimum Balance Requirements
Some accounts require a minimum balance to earn the advertised APY or avoid a monthly fee.
Ask: What happens if my balance drops?RATE
APY Requirements
The advertised APY may apply only to certain balances, account tiers, or customers who meet specific conditions.
Ask: Will I actually qualify for this APY?ACCESS
Transfers and Withdrawals
Check how easy it is to move money in and out of the account, including transfer timing and any restrictions.
Ask: How quickly can I access my money?CONVENIENCE
Deposit and Transfer Speed
ACH transfer times, mobile deposits, and external-bank connections can affect how practical the account is.
Ask: How easy is it to fund the account?PROTECTION
Deposit Insurance
Confirm that eligible deposits are held at an FDIC-insured bank or federally insured credit union and understand the applicable coverage rules.
Ask: Is my deposit eligible for coverage?SIMPLE DECISION FRAMEWORK
Use APY as One Part of the Decision
Instead of choosing an account based on one number, compare the rate, cost, access, requirements, and account protections together.
WATCH FOR THIS
Promotional Rates May Not Last
Some accounts advertise a temporary or conditional rate. Check whether the APY is ongoing, promotional, tiered, or dependent on meeting specific account requirements.
NEXT
Understand How APY Changes Your Savings Growth
The next step is understanding why even a relatively small difference in APY can produce a larger dollar difference over time.
SAVINGS GROWTH
How APY Affects Your Savings Over Time
APY tells you how much your money can grow over a year when compounding is included. The longer your money stays saved, the more meaningful even a small difference in APY can become.
RATE
Higher APY Means Faster Growth
If two accounts have the same balance and no meaningful fee difference, the account with the higher APY generally earns more interest over the same period.
TIME
Time Magnifies the Difference
A small rate advantage may produce only a modest difference over a few months, but the gap can widen when the same money stays invested for several years.
CONTRIBUTIONS
New Deposits Can Compound Too
When you continue adding money, each new contribution can begin earning interest as well, increasing the total amount of money that can benefit from the account's APY.
SIMPLE EXAMPLE
The Same Savings Plan Can Produce Different Results
Suppose two accounts receive the same starting deposit, the same monthly contribution, and stay open for the same amount of time.
The only difference is the APY. Over time, the account earning the higher yield can gradually pull ahead because more interest is being added to the balance.
Illustrative only. The bars show the direction of the difference, not a specific account balance.
IMPORTANT DISTINCTION
APY Already Includes the Effect of Compounding
The stated interest rate does not necessarily show the full effect of compounding over a year.
APY reflects the effect of compounding, making it more useful for comparing deposit accounts.
WHAT MAKES THE GAP BIGGER?
APY Differences Matter More in Certain Situations
A bigger balance gives the rate more dollars to work on.
More deposits increase the amount that can earn interest.
More time gives compounding more opportunities to build on prior interest.
Avoiding recurring fees helps more of your interest stay in the account.
KEEP IN MIND
Savings APYs Are Usually Variable
A calculator can show what would happen if an APY stayed constant, but many savings accounts can change their rates at any time. Use the projection as a comparison tool, not as a guaranteed future balance.
NEXT STEP
Avoid the Most Common APY Comparison Mistakes
A strong comparison looks beyond the headline number and checks whether the rate, fees, requirements, and account terms actually match.
COMMON MISTAKES
Common APY Comparison Mistakes to Avoid
APY makes savings accounts easier to compare, but a higher number does not automatically mean the account is a better fit. Watch for these common mistakes before making a decision.
RATE ONLY
Choosing the Highest APY Without Checking Fees
A higher APY can lose its advantage if the account charges recurring maintenance fees or other costs that reduce your net earnings.
Compare the projected ending balance after fees, not just the advertised APY.
QUALIFICATION
Assuming Everyone Gets the Advertised APY
Some rates apply only to certain balances, account tiers, new customers, or people who meet specific requirements.
Read the rate requirements and confirm that your balance and account activity qualify.
RATE CHANGES
Treating a Variable APY Like a Guaranteed Rate
Savings-account APYs can change. A projection based on today's rate does not guarantee that the same APY will remain available for the entire savings period.
Use the calculator as a comparison tool and recheck rates periodically.
ACCESS
Ignoring How Easy It Is to Access Your Money
A competitive APY may be less useful if transfers are slow, account access is inconvenient, or the account does not fit the purpose of your savings.
Compare transfer speed, withdrawal options, and how quickly you may need the money.
MINIMUMS
Overlooking Minimum Balance Requirements
Some accounts require a minimum opening deposit or minimum ongoing balance to avoid fees or earn the advertised rate.
Check what happens if your balance falls below the required amount.
ACCOUNT TYPE
Comparing Accounts With Different Purposes
A savings account, money market account, and CD may all offer APYs, but they can have very different access rules, terms, and penalties.
Compare accounts that serve the same financial purpose whenever possible.
QUICK CHECK
Before You Choose an Account, Ask:
Will I actually qualify for the advertised APY?
Are there monthly or avoidable account fees?
Is there a minimum balance requirement?
Can the APY change after I open the account?
Can I access the money when I realistically need it?
Is the account appropriate for this savings goal?
MAIN TAKEAWAY
Compare the Whole Account, Not Just the Percentage
APY is useful because it standardizes how deposit-account yield is expressed, but the best comparison also considers fees, requirements, access, rate changes, and how well the account fits your savings goal.
SAVE YOUR COMPARISON
Take Your APY Comparison With You
Use the downloadable worksheet to compare savings accounts offline and keep your rate, fee, and balance assumptions together in one place.
SAVE YOUR COMPARISON
Take Your APY Comparison With You
Download the APY Comparison Calculator worksheet, print your current comparison as a PDF, or return to the online calculator whenever you want to test a different savings scenario.
Keep multiple savings options together and review them using the same assumptions.
See how APY and recurring fees may affect estimated interest and your ending balance.
Download the Excel worksheet or print your current online comparison to a PDF file.
Excel-compatible worksheet. PDF printing uses your browser's built-in print dialog.
Editable Excel-compatible file
Print or save your calculator results
FREQUENTLY ASKED QUESTIONS
APY Comparison Calculator FAQ
These answers explain how APY works, what this calculator estimates, and what to check before choosing a savings account.
What is APY?
APY stands for annual percentage yield. It represents how much an account can earn over one year when the effect of compounding is included.
Because APY incorporates compounding, it is generally more useful than a simple interest rate when comparing savings accounts and other deposit products.
Is a higher APY always better?
A higher APY generally means more potential interest when everything else is equal, but the rate should not be evaluated by itself.
Monthly fees, balance requirements, promotional conditions, transfer access, and other account terms can affect the actual value of the account.
How does this APY calculator work?
The calculator uses the same starting deposit, monthly contribution, and time horizon for each account you enter.
It then converts each APY into an equivalent monthly growth rate and estimates the future value of your starting balance and monthly deposits. Recurring monthly fees are then subtracted from the projection.
Does APY already include compounding?
Yes. APY is designed to reflect the effect of compounding over a one-year period.
That is why the calculator does not simply divide the APY by 12. Instead, it converts the annual yield into an equivalent monthly growth rate for the projection.
Can a savings account APY change?
Yes. Many savings accounts have variable APYs, which means the financial institution can change the rate.
The calculator assumes the APY you enter remains constant for the selected time horizon, so the result should be treated as an estimate rather than a guaranteed future balance.
Why does the calculator include monthly fees?
Fees reduce the amount you ultimately keep. A savings account with a slightly higher APY can produce a worse net result if recurring fees offset the additional interest.
Including monthly fees makes the comparison more useful than looking at APY alone.
What if an account has no monthly fee?
Enter $0 for the monthly fee. The calculator will then project the account without subtracting recurring maintenance charges.
You should still check for other possible costs, including overdraft, wire, expedited transfer, or withdrawal-related fees where applicable.
Can I use this calculator for CDs?
You can use it for a basic yield comparison, but CDs have additional terms that this calculator does not model.
For a CD, also compare the term length, whether the rate is fixed, minimum deposit requirements, and any early-withdrawal penalty.
How often should I compare savings account APYs?
There is no single schedule that works for everyone, but it can be useful to recheck rates periodically or whenever your current bank changes its APY or fees.
You may also want to compare accounts when your balance grows substantially or when your savings goal changes.
Should I move my money every time I find a higher APY?
Not necessarily. The potential dollar gain may be small if the APY difference is minor or your balance is low.
Compare the estimated dollar benefit with the account's fees, transfer time, access, requirements, and the inconvenience of moving money before deciding whether a change makes sense for your situation.
REMEMBER
Calculator Results Are Estimates
Actual savings results can differ because rates can change, banks may calculate interest using different balance methods, contribution timing can vary, and account terms may include conditions not modeled by this calculator.
KEEP BUILDING
Put Your APY Comparison Into a Bigger Banking Decision
Compare the rate alongside fees, access, account requirements, and the role the account will play in your financial system.
KEEP BUILDING
Keep Building Your Banking System
Comparing APYs is one part of choosing where to keep your money. The next step is making sure your accounts work together around your savings goals, cash flow, access needs, and fees.
Bank Account Comparison Worksheet
Compare APY alongside fees, minimum balances, access, account features, and other practical differences.
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Decide which accounts should handle spending, bills, emergency savings, short-term goals, and transfers.
Build My Banking SystemLearn How APY Works
Learn what APY means, how compounding affects your yield, and why savings-account rates can change.
Learn About APYYOUR NEXT MOVE
Choose the Account That Fits the Whole Job
A strong savings account combines a competitive APY with manageable fees, reasonable requirements, dependable access, and a role that makes sense inside your broader financial system.
Compare rates in dollars, check the account terms, then choose the option that works best for the way you actually save.