Balance year by year
What builds the final balance
Given more time, the interest share keeps growing.
Summary
About the savings calculator
Saving regularly and letting compound interest work is one of the most reliable ways to build wealth. Compounding means you earn returns not just on your deposits, but on the returns those deposits have already generated — so your balance grows faster the longer you leave it.
This calculator projects how an initial amount plus regular contributions can grow over time at a given interest rate, showing the difference your rate, deposits and time horizon make.
Frequently asked questions
What is compound interest?
Compound interest is interest earned on both your original savings and on the interest already added. Over long periods it dramatically outpaces simple interest, which is why starting early makes such a large difference.
How much should I save each month?
A common guideline is to save at least 20% of your income, but the right amount depends on your goals and timeline. Use the calculator to work backwards: enter a target and adjust the monthly contribution until you reach it.
Does saving early really matter that much?
Yes — time is the most powerful factor in compounding. Money invested in your twenties has decades to grow, so early contributions can end up worth far more than larger contributions made later.
What interest rate should I assume?
A high-yield savings account might earn a few percent, while long-term stock market returns have historically averaged around 7% after inflation. Use a rate that matches where you plan to keep the money, and be conservative.