Savings Calculator
See how your savings grow over time with regular monthly contributions and interest. Enter a starting amount, monthly deposit, APY, and time frame.
Input Details
Enter every amount below in $. Changing this switches the unit — figures are not converted.
Results
Enter your details and click calculate to see results.
How Savings Grow Over Time
Your savings balance grows from two sources: the money you deposit, and the interest that account earns. When that interest is added to your balance and then earns interest itself, the growth compounds — and the longer your money stays invested, the larger the share of your balance that comes from interest rather than your own deposits.
Two habits make the biggest difference: choosing an account with a competitive rate, and contributing consistently. Together they turn even modest monthly savings into a meaningful balance over the years. Understanding a few core ideas helps you get the most from every dollar you set aside.
The power of compounding
Compounding means earning interest on both your original savings and the interest you've already earned. Early on, the effect looks small, but over many years it accelerates as your balance grows. This is why time in the account matters so much: money saved sooner has more years to compound than the same amount saved later.
High-yield vs traditional savings accounts
Many traditional savings accounts at big banks pay very little interest, while high-yield savings accounts (often offered by online banks) tend to pay noticeably more. The gap can be significant — sometimes several percentage points — which multiplies the interest you earn on the same balance. Because rates move with the broader economy, compare current offers rather than assuming any fixed number, and confirm the account carries deposit insurance.
Comparing accounts with APY
When shopping for a savings account, compare the APY (annual percentage yield) rather than the stated interest rate. APY reflects the effect of compounding over a year, so it gives you an apples-to-apples measure of what you'll actually earn. A higher APY on the same balance means more interest, making it the single most useful number for comparison.
Automation, goals, and beating inflation
Setting up automatic transfers on payday makes saving consistent and removes the temptation to spend first. Tying your savings to specific goals — an emergency fund, a down payment, a trip — helps you stay motivated and choose the right time frame. Keep in mind that inflation slowly erodes the value of idle cash, so earning a competitive yield helps your savings at least keep pace with rising prices rather than losing ground.
Frequently asked questions
- Enter a starting amount, a regular monthly contribution, an annual interest rate (APY), and a time frame. The calculator compounds your balance over time and shows how much you’ll have saved, separating your contributions from the interest earned.
- Use the APY offered by the account you plan to use. A traditional savings account often pays well under 1%, while a high-yield savings account may pay around 4%. Because APY already includes compounding, it’s the fairest number to compare accounts by.
- A common guideline is to save at least 20% of your income across goals, but any consistent amount helps. The calculator lets you test different monthly contributions so you can find a number that fits your budget and still reaches your goal.
- For money you may need soon — like an emergency fund — a high-yield savings account keeps it safe, liquid, and earning interest. For longer-term goals you might consider CDs or investments, which can earn more but carry lock-ups or market risk.