Interest Calculator for Money Market

Calculate interest earnings for money market accounts with our free online calculator. Learn how to compute APR, APY, and compound interest for money market funds.

How to Use This Calculator

This interest calculator for money market accounts helps you determine potential earnings from money market funds. Simply enter your principal amount, annual percentage rate (APR), and investment period to see your projected earnings.

Money market accounts typically offer higher interest rates than traditional savings accounts but may have restrictions on withdrawals and minimum balance requirements.

Key Features

Calculate both APR (Annual Percentage Rate) and APY (Annual Percentage Yield)
View interest earned over different time periods
Compare different investment scenarios
Visualize your earnings with a chart

Calculation Steps

Enter your initial deposit amount
Input the annual interest rate (APR)
Select the compounding frequency (daily, monthly, annually)
Enter the investment period in years
Click "Calculate" to see your results

Formula Used

The calculator uses the compound interest formula to calculate earnings:

A = P × (1 + r/n)^(nt)

Where:
A = Amount of money accumulated after n years, including interest.
P = Principal amount (the initial amount of money)
r = Annual interest rate (decimal)
n = Number of times interest is compounded per year
t = Time the money is invested for, in years

For APY (Annual Percentage Yield), the formula is similar but accounts for the effect of compounding on the annual rate.

Worked Examples

Example 1: Daily Compounding

If you deposit $10,000 at an APR of 2.5% with daily compounding for 5 years:

A = 10000 × (1 + 0.025/365)^(365×5)
= $11,343.72

You would earn $1,343.72 in interest over this period.

Example 2: Monthly Compounding

With the same principal and rate but monthly compounding:

A = 10000 × (1 + 0.025/12)^(12×5)
= $11,335.08

The difference is small but demonstrates how compounding frequency affects earnings.

Money Market vs. Savings Accounts

Compare the features of money market accounts with traditional savings accounts:

Feature	Money Market Account	Savings Account
Interest Rate	Higher (typically 1-3%)	Lower (typically 0.01-0.5%)
Minimum Balance	Often required ($100-$500)	None or very low
Withdrawal Limits	Limited (6/month common)	Unlimited
FDIC Insurance	Up to $250,000	Up to $250,000
Accessibility	Less liquid	Most liquid

Money market accounts offer higher interest rates but may have restrictions on withdrawals, while savings accounts provide more flexibility at lower rates.

Frequently Asked Questions

What is the difference between APR and APY?: APR (Annual Percentage Rate) is the simple annual interest rate, while APY (Annual Percentage Yield) accounts for compounding and shows the effective annual rate.
How often are money market accounts compounded?: Most money market accounts compound interest daily, which means you earn interest on both your principal and any accumulated interest from previous days.
What are the risks of money market accounts?: While generally low-risk, money market accounts can lose value if the financial institution fails. Also, some accounts may have withdrawal limits or minimum balance requirements.
Can I withdraw money from a money market account anytime?: No, most money market accounts have withdrawal limits (often 6 per month) and may require maintaining a minimum balance.
Are money market accounts taxable?: Interest earned on money market accounts is typically taxable as ordinary income, though some states may offer exemptions.