Money Market Calculator
Calculate returns on your money market account with compound interest, regular deposits, and APY analysis. Our calculator helps you project savings growth and compare money market options to maximize your earnings over time.
Last updated: December 15, 2024
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Starting amount to deposit
APY offered by the account
How often interest compounds
Regular monthly contributions
How long to save
Final Account Balance
After 5 years: $46,090.73
With Monthly compounding at 4.5% APY
Total Deposits
$40,000.00
Interest Earned
$6,090.73
Effective APY
4.594%
Growth Summary
Quick Example Result
$10,000 initial + $500/month at 4.5% APY for 5 years:
Final Balance: $46,090.73
Interest Earned: $6,090.73
How This Calculator Works
Our money market calculator uses compound interest formulas to project account growth over time. It factors in your initial deposit, regular contributions, interest rate (APY), and compounding frequency to provide accurate financial projections for your savings strategy.
The Compound Interest Formula
A = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) - 1) / (r/n)]
A = Final amount
P = Principal (initial deposit)
r = Annual interest rate (decimal)
n = Number of compounding periods per year
t = Time in years
PMT = Regular payment amount
Key Calculation Components
Principal Growth
- Initial deposit compounds over entire period
- Earlier deposits have more time to grow
- Compounding frequency affects total returns
- Higher APY significantly impacts long-term growth
Regular Deposits
- Monthly contributions create annuity growth
- Each deposit compounds from its start date
- Consistent investing maximizes compound effect
- Dollar-cost averaging benefits included
Understanding APY vs APR
APY (Annual Percentage Yield) includes the effect of compounding, while APR (Annual Percentage Rate) does not. For money market accounts, APY is the more important figure because it represents your actual annual return. Daily compounding can increase your effective yield by 0.1-0.2% compared to monthly compounding.
Sources & References
- Federal Deposit Insurance Corporation (FDIC) - Money Market Account Guidelines and Insurance InformationOfficial regulations and consumer protection details
- Federal Reserve Economic Data (FRED) - Money Market Interest Rate Trends and Historical DataCurrent and historical money market rate information
- Consumer Financial Protection Bureau (CFPB) - Money Market Account Consumer GuidelinesBest practices for money market account selection
Exploring other investment options? Check out our rent vs sell calculator and covered call calculator.
Get Custom Calculator for Your BusinessExample Calculation
Account Details:
- Initial Deposit: $10,000
- APY: 4.5%
- Monthly Deposit: $500
- Compounding: Monthly
- Time Period: 5 years
Growth Breakdown:
Total Deposits
$40,000.00
Interest Earned
$6,090.73
Final Balance
$46,090.73
Result: Your money grew by $6,090.73 through compound interest
This represents a 15.2% return on your total deposits over 5 years.
Frequently Asked Questions
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