Savings Goal Calculator

A savings goal calculator answers one question honestly: how much must you put aside each month to hit a specific number by a specific date. Type in your target, what you've saved already, a timeframe, and an expected return, and it works backward to the exact monthly deposit. With the defaults below, reaching $100,000 in five years takes $1,281.74 a month, not the $1,500 you'd need with no growth at all. Change any number and the plan updates instantly, so you can test timelines before you commit to one. A goal you can see the price of is a goal you can actually plan around.

The total amount you want to have at the end.
What you have today. It keeps growing while you add to it.
How long until you need the money.
4-5% for a savings account, 5-7% for a balanced portfolio.
Monthly deposit needed
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Try a scenario:

How the savings goal calculator works

It works backward from your goal. First it grows what you've already saved at your expected return, so it knows how much of the work is already done. Then it takes the remaining shortfall and splits it into equal monthly deposits across your timeframe.

Under the hood this is the same time-value-of-money math behind mortgages and annuities. Nothing is estimated or rounded away. Two standard formulas (the future value of a lump sum, and the future value of a series of payments) combine so the final balance lands exactly on your goal. The chart and the yearly table show the balance at the end of each year, so you can watch progress instead of imagining it.

The part people miss: your starting savings matter more than they look. Money already invested compounds for the full timeframe. A $10,000 head start at 5% quietly removes about $189 from the monthly bill over five years, compared with starting from zero.

Formula

Monthly deposit = (Goal − Saved × (1 + r)n) × r ÷ ((1 + r)n − 1)

Here r is the monthly return (your annual rate ÷ 12) and n is the number of months. The first piece, Saved × (1 + r)n, is what your existing savings grow into if you never touch them. Subtract it from the goal and you get the shortfall your deposits must cover. The rest is the standard annuity formula, which converts that shortfall into equal monthly payments that also earn returns along the way. If your savings already cover the goal, the shortfall is zero or negative and the answer is simply $0. And if the return is 0%, the formula degrades gracefully to shortfall ÷ months.

Example

Say you want $50,000 in 3 years. You have $5,000 saved and expect 4% annual returns. The monthly rate is 0.04 ÷ 12 ≈ 0.003333, and 3 years means 36 deposits. The growth factor (1.003333)36 ≈ 1.1273, so your $5,000 becomes about $5,636 on its own. That leaves a shortfall of $50,000 − $5,636 = $44,364.

Now convert the shortfall into monthly payments. The annuity factor is (1.1273 − 1) ÷ 0.003333 ≈ 38.18. Divide: $44,364 ÷ 38.18 ≈ $1,161.91 per month. Deposit that amount every month for 36 months and you land exactly on $50,000.

Notice what the starting $5,000 bought you. Without it, the same goal needs about $1,310 a month. A head start of $5,000 cut the monthly bill by roughly $148. Early money is cheap money.

How to read your results

The monthly deposit is the number that matters. Compare it with what your budget can actually spare after rent, bills, and debt payments. If it fits with room to spare, automate the transfer on payday and stop thinking about it. Automation beats willpower every single time.

Total you'll deposit shows how much comes from your own pocket, and growth from returns shows what compounding contributes. With the defaults, your deposits cover about $76,900 of the $100,000 and returns chip in roughly $13,100. The no-interest line is your fallback: $1,500 a month if the money earned nothing. The $218 gap between the two monthly figures is, quite literally, the reward for letting your money work.

If the monthly number is too big, you have three honest levers: more time, a higher expected return, or a smaller goal. Time is usually the kindest lever, because each extra year hands compounding another full shift. Aiming further out? Our guide on how much you need to Coast FIRE at 35 runs the same math over decades instead of years.

Scenario comparison

Three common goals, one calculator. Short timelines cost more per month, no surprise there, but look at how the return rate softens longer goals: the house deposit earns five years of compounding on every payment, the emergency fund barely earns any.

Scenario Goal Saved Years Return Monthly needed
Emergency fund $15,000 $0 1 3% $1,232.91
House down payment $60,000 $5,000 4 5% $1,016.61
New car $25,000 $0 2 4% $1,002.29

Frequently asked questions

What return rate should I use?
It depends on where the money sits. A high-yield savings account might earn 4 to 5 percent. A balanced portfolio has historically returned around 5 to 7 percent after inflation. Cash earning nothing costs you the most, and the calculator shows exactly how much. When in doubt, pick the lower number. A plan that works at 4 percent and beats it is a pleasant surprise. A plan that needs 9 percent is a hope, not a plan.
What if I've already saved enough?
Then the monthly deposit drops to zero, and the result panel tells you so plainly. Your current savings, growing at your expected return, reach the goal on their own. That doesn't mean you should stop saving entirely. It means this particular goal is funded, and your next dollar can go somewhere else: a bigger emergency fund, retirement accounts, or the next goal on your list. Redirect the money, don't spend it by accident.
Does this account for inflation?
Indirectly, yes, if you use a real return. Enter your return after inflation, for example 5 percent instead of 8 percent nominal, and the goal stays in today's dollars. If you use a nominal return, treat the goal as a future-dollar figure, which buys less than it sounds. Most people find the real-return version easier to plan around, because $100,000 means something concrete to them right now.
What if I can only save a fixed amount each month?
Flip the question. Enter your timeframe and return, then lower the goal until the monthly deposit matches what you can afford. That goal is your realistic target. Or keep the goal and stretch the years until the number fits. Either way you're negotiating with arithmetic instead of guessing, and arithmetic doesn't get offended. Small, consistent deposits you actually make beat an ambitious plan you abandon in month three.
How accurate is the yearly breakdown?
The table assumes deposits land at the end of each month and the return compounds monthly at a steady rate. Real returns wobble. Some years you'll be ahead of the table, some years behind. Treat the yearly balances as checkpoints, not promises. If you're within a few percent of the checkpoint each year, the plan is working. If you're drifting far behind, raise the deposit early, while the fix is still cheap.
Should I include taxes and fees?
The calculator works with the return you give it, so use a return net of fees and, ideally, taxes. If your account charges 1 percent a year, subtract that from your expected return before typing it in. For money in tax-advantaged accounts like a Roth IRA, taxes mostly stay out of the picture. For a regular brokerage account, a slightly lower return assumption keeps the plan honest.

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Sources & methodology

Every number on this page is computed live in your browser by the JavaScript shipped with this page. Nothing is sent to a server, nothing is stored, nothing is tracked. The math is standard time-value-of-money: the future value of a lump sum and the future value of an ordinary annuity, the same formulas found in finance textbooks and CFP study materials. Our return assumptions and calculation methods across the site are documented on the savings goal formula and methodology page.

Disclaimer: This calculator is for educational purposes only and is not financial advice. Consult a qualified professional for decisions.