Estimate your earnings with our Money Market Account Calculator. Compare rates and see how fast your savings can grow securely.
| Period | Starting Balance | Contributions | Interest Earned | Ending Balance |
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How each compounding frequency affects your balance with your current inputs:
| Compounding Frequency | Final Balance | Total Interest | Effective APY |
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What Is a Money Market Account Calculator?
A money market account calculator is a financial planning tool that shows exactly how your savings will grow based on your deposit amount, interest rate, and compounding schedule. Enter a starting balance, any monthly additions, the APY your account offers, and your timeframe — and you get an instant projection of your final balance, total interest earned, and a full period-by-period breakdown.
Rather than guessing, this calculator gives you precise figures to set realistic goals, compare accounts side by side, and decide whether a money market account fits your specific savings plan.
The national average money market rate is just 0.43% APY, yet top online banks currently offer up to 4.40% APY — nearly ten times more. On a $50,000 balance over five years, that gap is worth over $10,000 in additional interest. This calculator shows you exactly what you’re leaving on the table.
What Is a Money Market Account?
A money market account (MMA) is an interest-bearing deposit account offered by banks and credit unions. It sits at the crossroads of a savings account and a checking account — you earn a higher interest rate than a standard savings account, while also getting check-writing privileges and debit card access in many cases.
Money market accounts are FDIC-insured at banks and NCUA-insured at credit unions — up to $250,000 per depositor — making them one of the safest places to keep cash while still earning a competitive return. They work well for emergency funds, short-term savings goals, or any money you want accessible but actively earning.
| Feature | Money Market Account | High-Yield Savings | Regular Savings | Checking Account |
|---|---|---|---|---|
| Typical APY | Up to 4.40% | Up to 5%+ | Avg. 0.43% | Near 0% |
| FDIC / NCUA Insured | ✓ | ✓ | ✓ | ✓ |
| Check Writing | ✓ Often | ✗ | ✗ | ✓ |
| Debit Card Access | ~ Sometimes | ~ Sometimes | ✗ | ✓ |
| Min. Balance Required | Often $1K–$2.5K | Usually $0 | Typically low | Varies |
| Best For | Emergency fund, short-term savings | Set-and-forget savings goals | Basic saving | Daily spending |
How to Use This Calculator
Initial Deposit
The amount you’re putting in today. Even $500 grows meaningfully at a strong APY. Use the slider or type the amount directly.
Monthly Contribution
Any recurring amount you’ll add each month. Set it to $0 to project a lump-sum deposit only.
Annual Rate (APY)
Enter the APY your account currently offers. Top online banks offer 3.90%–4.40% APY. Check your bank’s posted rate before entering.
Time Period — Months or Years
Toggle between Months and Years using the buttons next to the field. Planning a 6-month emergency fund? Use months for precision.
Compounding Frequency
How often interest is calculated and added to your balance. Daily compounding earns slightly more than monthly on the same stated rate.
Read the Results
Final balance, interest earned, and monthly earnings update instantly. Switch to the chart, schedule, or comparison tabs below for deeper analysis.
Tips to Get More from Your Money Market Account
Compare Rates — Don’t Accept the Average
The national average MMA rate is 0.43%–0.56% APY. The best online banks currently offer 3.90%–4.40% APY. On a $25,000 balance over three years, the difference can add up to $2,500+ in extra interest. Run both rates through this calculator before opening any account.
Watch for Minimum Balance Requirements
Many money market accounts require a minimum balance — often $1,000 to $2,500 — to earn the advertised APY or to waive monthly maintenance fees. Falling below the threshold can wipe out your interest gains with fees, so confirm the policy before committing.
Automate Your Monthly Contributions
Automatic transfers remove the temptation to skip a month. Even $100 added monthly at 4.00% APY turns a $5,000 starting deposit into over $12,700 in five years — versus $6,083 with no contributions at all.
Use Months for Short-Term Goals
Not every savings goal spans years. If you’re building a 6-month emergency fund or saving for a vacation in 10 months, switch the time period toggle to Months for a precise calculation instead of rounding to the nearest year.
Compound More Frequently When You Can
When two accounts offer the same stated rate, the one compounding daily will always pay slightly more than one compounding monthly or annually. The difference widens on larger balances and longer timeframes. Check the Rate Comparison tab for your exact numbers.
Keep an Eye on Rate Changes
Money market rates are variable and follow the Federal Reserve. After three Fed cuts in 2025, MMA yields have been declining. If rate certainty matters more than flexibility, compare a fixed-rate CD with our CD Calculator.
Frequently Asked Questions
At the national average of 0.43% APY, $10,000 earns about $43 in the first year — roughly $3.60 per month. Over five years with no additions, that’s around $218 in total interest.
Switch to a top online bank at 4.00% APY and the same $10,000 earns approximately $408 in year one, growing to about $2,167 over five years. Add $200 per month and your balance climbs to roughly $25,300 after five years — with over $3,300 from interest alone.
Enter $10,000 in the Initial Deposit field above to see the exact projection with your preferred rate and timeframe.
At 4.00% APY with daily compounding, $500,000 earns approximately $20,400 in year one — about $1,700 per month in passive interest with no additional contributions.
Over five years, the same $500,000 grows to roughly $609,000, with over $109,000 in interest earned. At the national average of 0.43% APY, the five-year return would only be around $10,900 — a difference of nearly $98,000.
Important note: FDIC coverage is capped at $250,000 per depositor per bank. For a $500,000 balance, spread funds across two FDIC-insured institutions or use NCUA-insured credit unions to maintain full protection.
At 4.00% APY with monthly compounding, $2,500 earns roughly $102 in the first year — about $8.50 per month. Over three years, that adds up to around $320 in total interest, bringing your balance to roughly $2,820.
Add $100 per month to that same $2,500 and over five years at 4.00% APY, your balance grows to approximately $10,600 — with about $1,100 earned entirely from compound interest.
Note that some MMAs require $2,500 as a minimum to earn the advertised rate or waive fees — TotalBank’s 4.01% APY account is one example. Always check the minimum balance policy so fees don’t offset your earnings.
APY (Annual Percentage Yield) factors in compounding — it reflects what you’ll actually earn over a full year including interest on previously credited interest. This is the number banks advertise and the one that matters most when comparing accounts.
APR (Annual Percentage Rate) is the simple stated rate without compounding factored in. For deposit accounts, APY is always the more useful figure, and this calculator uses APY throughout.
Both are solid options — the right pick depends on what you need. Money market accounts frequently offer check-writing privileges and debit card access, making them more flexible for accessing funds directly. High-yield savings accounts often post slightly higher APYs and tend to have lower or no minimum balance requirements.
If your emergency fund needs to double as a safety net you can tap by writing a check, an MMA’s added flexibility is a genuine advantage. To compare projected balances directly, use our High-Yield Savings Calculator alongside this one.
Compounding frequency determines how often earned interest is added to your balance — and starts earning its own interest. Daily compounding produces slightly more than monthly, which produces more than annual, even at the same stated rate.
On a $50,000 balance at 4.00% APY over five years: daily compounding generates about $24,596 in interest, while annual compounding generates about $24,333 — a $263 difference. The gap widens on larger balances and longer timeframes. See the Rate Comparison tab for a side-by-side view using your exact numbers.
Yes. Bank money market accounts at FDIC-insured institutions are covered for up to $250,000 per depositor, per bank, per ownership category. At NCUA-insured credit unions, the same limits apply. Your money is protected even if the institution fails, as long as your balance stays within insurance limits.
Do not confuse a bank money market account with a money market fund offered by brokerages. Money market funds are investment products and are not FDIC-insured. Bank deposit accounts are what this calculator refers to throughout.
Yes. Interest earned in a money market account is classified as ordinary income by the IRS and taxed at your regular federal income tax rate in the year it is credited. Your bank will send a Form 1099-INT if your interest exceeds $10 during the tax year.
If tax efficiency is a priority alongside liquidity, some savers pair an MMA with tax-advantaged accounts like an HSA or I Bonds for a portion of their savings.
As of April 2026, the FDIC national average for money market accounts is 0.43%–0.56% APY. However, many competitive online banks and credit unions offer 3.50%–4.40% APY. TotalBank offers 4.01% APY (with a $2,500 minimum), and several others cluster around 4.00%.
Any rate above 3.00% APY is strong in the current environment. Since rates have been declining following three Federal Reserve cuts in 2025, locking in a fixed rate through a CD may be worth comparing. Run the numbers with our CD Calculator.