Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Project the future value of an initial deposit plus regular monthly contributions.
$32703.47
Most real savings plans aren't a single lump-sum deposit -- they involve an initial amount plus regular ongoing contributions, both growing together over time. This calculator projects that combined future value, distinct from a pure lump-sum growth question (see the Compound Interest Calculator for that case).
Enter your initial deposit, planned monthly contribution, expected annual rate of return, and how many years you'll be saving.
Future Value = Initial × (1 + r)n + Monthly Contribution × (((1 + r)n − 1) ÷ r)
where r = monthly rate (annual rate ÷ 12) and n = number of months
Use this to project a general savings account or investment account balance over time. If you have a specific target amount in mind and want to know the contribution needed instead, use the Savings Goal Calculator, the inverse of this question.
Starting from zero, saving $300 a month at 4% for 5 years means you contribute $18,000 and end with roughly $19,890, so about $1,890 comes from growth. Now take the page's scenario of $1,000 up front plus $200 a month at 5% for 10 years: you contribute $25,000 in total and the balance ends near $32,700, meaning growth adds about $7,700. Notice how in the early years most of the balance is your own money, while later on the growth portion speeds up. That is why starting sooner matters more than it feels like in year one.
The formula treats the rate as constant, compounds monthly, and assumes each contribution is made at the end of the month. If you deposit at the start of each month, or your account compounds daily, actual results will differ slightly. Real savings accounts change their rates over time, and investment accounts move up and down rather than growing smoothly, so the output is a projection, not a forecast. The calculator also ignores inflation, which means a future balance will buy less than the same number does today. To get a rough inflation-adjusted view, use a rate that is your expected return minus expected inflation.
For tax treatment, contribution limits and account choices, check with the official source for your country or a qualified financial or tax professional.
No -- this projects gross growth before any taxes that may apply depending on the account type (taxable brokerage vs. tax-advantaged retirement account, for example).
Use your specific account's actual or expected rate -- a savings account, CD, and investment account all have very different typical rates, so don't assume one figure applies broadly.
Enter zero for the initial deposit. The calculator then projects only the growth of the monthly contributions.
Yes, but returns from investments are not guaranteed and vary year to year. Use a cautious average rate and treat the result as a rough range.
No. To see what the future balance might feel like in today's money, lower the rate you enter by an assumed inflation rate.
Reference: Social Security Administration