Savings Goal Calculator: Find Your Monthly Number
This savings goal calculator tells you how much to save each month to reach a target by a set date. You enter your goal, your starting balance, your time frame, and an expected return.
The calculator above then solves for the one number that matters most: your required monthly contribution. That turns a giant, vague goal into a clear monthly habit you can actually track.
How it's calculated
A savings goal calculator works backward from your target. Instead of asking how big your savings will grow, it asks how much you must add each month to land on a specific number by a specific date. It takes your goal amount, current balance, years remaining, and an assumed annual return, then compounds the math monthly.
The result is a single monthly figure. Time and return both shape that number. A longer time frame lets compounding do more work, so each monthly deposit can be smaller. A higher assumed return also lowers the monthly amount, but it adds risk, so choose a rate that fits how you invest. To see how a fixed deposit grows instead, use the investment growth calculator. For short-horizon goals, a stable-value vehicle like the one in our money market account guide is often a better fit than equity returns.
Starting early is one of the biggest levers in this formula, and the effect is larger than most people expect. Take two savers with the same $1,000,000 goal, the same 7% assumed annual return, and no starting balance. The first starts at 35 and has 30 years to save; solving the calculator's formula puts the required contribution at about $820 a month. The second waits until 45 to start, leaving only 20 years; the required contribution jumps to about $1,922 a month — more than double. Put another way, the saver who starts 10 years earlier reaches the same $1,000,000 goal for well under half the monthly contribution, purely because compounding has a longer runway to do the work instead of new deposits.
The return rate you plug into the calculator should match the vehicle you actually use to save. Equity index funds carry the highest long-run average returns of the common options but also the most volatility, so a downturn early on can leave your balance well below your contributions for a while — a fit for goals still a decade or more away. Bonds and bond funds trade some of that upside for steadier, more predictable returns and better liquidity, which is why they're a common choice as a goal's deadline gets close. Diversified mutual funds sit in between, blending stock and bond exposure in one fund so you can dial risk up or down. SEC Investor.gov's guidance on asset allocation frames the tradeoff simply: match your risk tolerance and time horizon to the mix. As a rule of thumb, a goal more than 10 years out can usually absorb a stock-heavy allocation, while a goal inside 3–5 years is better funded in bonds, a conservative mutual fund, or a high-yield savings account where the deadline isn't at the mercy of a market drop right before you need the money.
A worked example
Say your goal is $1,000,000 in 30 years. You start with $20,000 and assume a 7% annual return compounded monthly.
Left alone with no monthly deposits, that $20,000 grows to only about $162,330, roughly 16% of the goal. So the contributions carry the rest.
The calculator shows you need to save about $687 each month to reach $1,000,000. Breaking a seven-figure target into one monthly number makes it feel reachable.
Common mistakes to avoid
- Assuming the starting balance alone will carry you. A lump sum left to grow rarely covers a large goal, so monthly contributions usually do the heavy lifting.
- Picking an unrealistic return. A high rate shrinks your monthly number on screen but raises real-world risk. Match the rate to your actual investments.
- Ignoring inflation. A target set in today's dollars may buy less by your deadline, so revisit big goals over time.
- Treating the monthly amount as fixed forever. Re-run the numbers after raises, market swings, or a changed deadline.
- Starting late. Each year you wait raises the monthly amount needed, because compounding has less time to help.
Frequently asked questions
What is a savings goal calculator?
A savings goal calculator tells you how much to save each month to reach a target amount by a chosen date. You enter your goal, current balance, time frame, and expected return, and it solves for the monthly contribution needed.
How much do I need to save each month to reach $1 million?
It depends on your time frame, starting balance, and return. For example, with $20,000 saved today, a 7% annual return, and 30 years, you would need about $687 per month to reach $1,000,000. Enter your own numbers in the calculator above.
Does starting earlier lower the monthly amount I need?
Yes. Starting earlier gives compounding more time to work, so each monthly deposit can be smaller. Waiting raises the monthly amount needed because there are fewer years for your money to grow.
What return rate should I use?
Use a rate that matches how your money is invested, not a best-case guess. A higher assumed return lowers your monthly number but adds risk. A conservative rate gives a safer, more realistic monthly target.
Should I save for $1 million in stocks or bonds?
It depends mainly on how far away your deadline is. For a goal more than 10 years out, an equity-heavy mix (like a stock index fund) has historically produced the higher returns that make a $1,000,000 target reachable with a smaller monthly contribution, even though it comes with more short-term ups and downs. As the deadline gets inside 3–5 years, shifting toward bonds or a conservative mutual fund trades some of that growth for stability, so a market drop right before you need the money doesn't derail the goal. Many savers blend the two and gradually shift the mix as the deadline approaches.
Sources
We prioritize primary sources for rules, formulas, rates, limits, and definitions. See our calculator methodology and editorial policy.