Money Market Account Interest Calculator
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Reviewed by Calculator Editorial Team
Money market accounts are short-term savings accounts that offer higher interest rates than traditional savings accounts. This calculator helps you estimate the interest earned on your money market account balance over time.
How to Use This Calculator
To calculate your money market account interest:
- Enter your principal amount (the initial deposit)
- Select the interest rate (APY) offered by your bank
- Choose the term length (in years)
- Select the compounding frequency
- Click "Calculate" to see your estimated earnings
The calculator will show you the total interest earned and the future value of your investment.
Formula Used
The calculator uses the compound interest formula:
A = P × (1 + r/n)nt
Where:
- A = the future value of the investment/loan, including interest
- P = the principal investment amount
- r = the annual interest rate (decimal)
- n = the number of times that interest is compounded per year
- t = the time the money is invested for, in years
The interest earned is calculated as A - P.
Worked Example
Suppose you deposit $5,000 in a money market account with a 2.5% APY, compounded quarterly, for 3 years.
Using the formula:
A = $5,000 × (1 + 0.025/4)4×3
A = $5,000 × (1.00625)12
A ≈ $5,000 × 1.0806
A ≈ $5,403.00
The interest earned would be $5,403.00 - $5,000 = $403.00.
Types of Money Market Accounts
There are several types of money market accounts available:
| Account Type | Features | Typical Interest Rate |
|---|---|---|
| Traditional Money Market Account | FDIC-insured, check-writing allowed, no minimum balance | 0.10% - 2.50% APY |
| High-Yield Money Market Account | Higher interest, may require minimum balance | 1.50% - 4.50% APY |
| Certificate of Deposit (CD) | Fixed term, higher interest, penalty for early withdrawal | 1.00% - 5.00% APY |
| Online Money Market Account | No branch access, often higher interest | 1.00% - 3.50% APY |
Choose the type of account that best fits your financial needs and goals.
Frequently Asked Questions
- What is the difference between APR and APY?
- APR (Annual Percentage Rate) is the simple interest rate, while APY (Annual Percentage Yield) includes the effect of compounding interest. APY is always higher than APR for the same account.
- How often is interest compounded in money market accounts?
- Most money market accounts compound interest daily, but some may compound monthly or quarterly. The calculator allows you to select the compounding frequency.
- Are money market accounts FDIC-insured?
- Yes, money market accounts are typically FDIC-insured up to $250,000 per depositor, per insured bank, for each account ownership category.
- Can I withdraw money from a money market account anytime?
- Yes, you can usually withdraw funds from a money market account at any time, though some high-yield accounts may have withdrawal limits or restrictions.
- What fees should I look for in a money market account?
- Common fees to watch for include monthly maintenance fees, minimum balance requirements, and early withdrawal penalties for CDs.