$98,440.45
$13,440.45
$85,000.00
$224.01
$10,483.55
$93.75
$22,500.00
$98,440.45
$13,440.45
$85,000.00
$224.01
$10,483.55
$93.75
$22,500.00
The Money Market Account Calculator projects the growth of your money market account (MMA) over time, accounting for compound interest on both your initial deposit and regular monthly contributions. Money market accounts combine the higher interest rates of savings accounts with the check-writing and debit card access of checking accounts, making them a versatile cash management tool.
Money market accounts are offered by banks and credit unions and are FDIC-insured (or NCUA-insured for credit unions) up to $250,000 per depositor. They typically offer rates competitive with high-yield savings accounts — currently 3.5-5.0% APY — while providing more flexible access to your funds than certificates of deposit.
The key distinguishing feature of money market accounts is their hybrid nature. Unlike pure savings accounts, MMAs often come with check-writing privileges, debit cards, and ATM access. Unlike checking accounts, they offer meaningful interest rates. This makes them particularly well-suited for emergency funds, business operating reserves, and large cash holdings that need to remain liquid.
However, MMAs typically require higher minimum balances than regular savings accounts — often $2,500 to $25,000. Falling below the minimum may trigger monthly fees of $10-25 that can quickly erode interest earnings. Our calculator lets you factor in minimum balance requirements to ensure you maintain an adequate cushion.
The calculator projects your balance growth using compound interest with monthly compounding, which closely approximates the daily compounding used by most financial institutions. For a $25,000 initial balance with $1,000 monthly deposits at 4.5% APY, you can expect your account to grow to approximately $97,000 in 5 years, with over $7,000 of that coming from interest alone.
When choosing a money market account, compare APY, minimum balance requirements, monthly fees, withdrawal limits, access methods (checks, debit card, ATM), and the institution's overall financial strength. The best MMAs offer high rates with low or no minimums and no monthly fees.
The calculator uses the standard compound interest formula:
FV = PV × (1 + APY/12)^(12t) + PMT × [((1 + APY/12)^(12t) - 1) / (APY/12)]
The average monthly interest is calculated by dividing total interest by the total number of months. This gives you a sense of your account's monthly earning power at its average balance level.
The final balance shows your projected account value. Total interest reveals how much the MMA has earned beyond your deposits. Compare the average monthly interest against any monthly fees — if fees exceed interest, the account is costing you money. Ensure your balance stays above the minimum requirement to avoid fees.
Inputs
Results
$50K initial + $2K/month at 4.5% grows to ~$132K in 3 years
Inputs
Results
Build emergency fund to ~$23K in 2 years at 4% APY
A money market account (MMA) is a deposit account offered by banks and credit unions that typically earns higher interest than a regular savings account and offers check-writing and debit card access. MMAs are FDIC-insured up to $250,000.
A money market account is a bank deposit product (FDIC-insured). A money market fund is a mutual fund that invests in short-term debt securities (not FDIC-insured but regulated by the SEC). They are different products despite similar names.
Minimums range from $0 to $25,000 depending on the institution. Most competitive MMAs require $2,500-$10,000. Online banks often have lower minimums than traditional banks.
If you maintain the minimum balance and avoid fees, MMAs are excellent for large cash holdings that need liquidity. The combination of competitive rates, check access, and FDIC insurance is hard to beat.
Not from market losses — MMAs are FDIC-insured deposit accounts. However, if monthly fees exceed interest earned (due to a low balance), your account value can decline. Inflation can also erode purchasing power.
Regulation D previously limited certain withdrawals to 6 per month, but this was indefinitely suspended in 2020. Banks may still impose their own limits.
Many MMAs come with debit cards and/or check-writing privileges, unlike traditional savings accounts. This makes them more flexible for emergency fund access.
Most banks charge a monthly maintenance fee ($10-25) or reduce your interest rate to a lower tier. Some may convert the account to a regular savings account.
MMA rates are variable and can change at any time. They generally track the Federal Reserve's federal funds rate. Rate changes are usually communicated in advance.
Choose an MMA if you need access to your money. Choose a CD if you can lock away funds for a fixed term — CDs typically offer slightly higher rates in exchange for reduced liquidity.
Roboculator Team
The Roboculator Team explains calculations, planning tools, and practical formulas in clear language for real-life situations.
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