Free money market return calculator. Project returns on money market accounts with tiered rates for different balance thresholds and compound interest.
The Money Market Return Calculator projects how much your money market account will earn over time, including support for tiered interest rates based on balance thresholds. Enter your deposit, contribution plan, and the tiered rate structure of your account to see projected growth and total interest earned.
Money market accounts (MMAs) combine features of savings accounts and checking accounts. They typically offer higher interest rates than standard savings accounts, especially on larger balances, while providing limited check-writing privileges and debit card access. Many MMAs use tiered rate structures where higher balances earn better rates.
Whether you are evaluating a new money market account, comparing tiered rate structures, or projecting growth on an existing MMA, this calculator gives you clear projections that account for the tiered rate system most money market accounts use. Money market accounts combine the higher yields of savings instruments with the check-writing and debit access of traditional bank accounts. Comparing returns across tiered rate structures helps you determine whether the higher minimum balance requirements are worth the additional yield.
Money market accounts with tiered rates make it difficult to calculate actual returns because different portions of your balance earn different rates. This calculator does the tiered math for you and shows the effective blended rate you actually earn, letting you accurately compare MMAs against other savings options. Knowing the exact dollar benefit of meeting higher balance tiers helps you decide where to allocate your cash.
For tiered rates, interest is calculated on each portion of the balance within its tier: Interest = ∑ (tier_balance × tier_APY) FV = P(1 + blended_rate/12)^(12×t) + PMT × [((1 + blended_rate/12)^(12×t) – 1) / (blended_rate/12)] Blended APY = Total Annual Interest / Balance
Result: Final balance: $85,143 | Interest earned: $5,143
Starting with $50,000, the initial balance lands in the highest tier at 4.25%. With $500 monthly contributions over 5 years, the balance grows to $85,143. As the balance increased, more money earned the top-tier rate, producing a blended effective yield of approximately 3.91% when weighted across tiers over the full period.
A money market account advertising a top tier of 4.25% APY on balances over $50,000 sounds attractive, but the blended rate on a $55,000 balance might only be 3.85% because the first $10,000 earns 2.50% and the next $40,000 earns 3.50%. A flat-rate HYSA paying 4.00% on any balance would actually earn more in this scenario. Always compare the blended effective rate at your actual balance.
MMAs are best suited for larger balances where the top-tier rate is competitive, and when you need occasional check access that savings accounts do not provide. They work well for business operating funds, large emergency reserves, and short-term holding of funds earmarked for a major purchase.
To get the most from a tiered MMA, keep your balance above the highest tier threshold. Consolidate funds from multiple low-rate accounts to reach the top tier. Set up automatic contributions to maintain and grow the balance. Regularly compare your effective blended rate against flat-rate alternatives to ensure the MMA is still the best home for your money.
A money market account (MMA) is a deposit account that typically offers higher interest rates than standard savings accounts, especially on larger balances. MMAs often come with limited check-writing privileges and debit card access, making them a hybrid between savings and checking accounts. They are FDIC insured.
With tiered rates, different portions of your balance earn different interest rates. For example, the first $10,000 might earn 2.50%, the next $40,000 earns 3.50%, and anything above $50,000 earns 4.25%. The bank calculates interest on each portion at its respective rate, resulting in a blended effective yield.
MMAs often offer higher rates on large balances and provide check-writing capability. However, high-yield savings accounts may offer competitive flat rates without requiring large balances. Compare the blended MMA rate at your actual balance level against HYSA rates for an accurate comparison.
Bank money market accounts are FDIC insured up to $250,000 per depositor per bank. However, money market funds sold by investment companies are not FDIC insured. Make sure you understand whether you have a money market account (deposit) or a money market fund (investment).
Federal Regulation D previously limited certain withdrawals from MMAs to 6 per month, but this rule was suspended in 2020 and many banks no longer enforce it. However, some banks still impose their own limits. Check with your specific bank for current withdrawal policies.
Many MMAs charge monthly maintenance fees if the balance falls below a minimum threshold. Some also charge for excessive transactions. These fees can significantly reduce returns, especially on smaller balances. Look for fee-free options or ensure you can maintain the required minimum.