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Monthly deposit = (goal − already-saved × (1+i)ⁿ⁾ × i ÷ ((1+i)ⁿ − 1), the sinking-fund formula: i is the monthly interest rate (annual ÷ 12), n is the months to the deadline. With 0% interest it reduces to (goal − saved) ÷ months. Results are estimates for planning, not professional financial advice.
Reaching a goal is the future-value formula run in reverse: you know the target and the deadline, so the calculator solves for the monthly contribution that gets you there. With no interest, it is the simple split: monthly deposit = (goal − already saved) ÷ months.
With interest, it is the sinking-fund formula: monthly deposit = (goal − current × (1+i)ⁿ⁾ × i ÷ ((1+i)ⁿ − 1), where i is the monthly interest rate (annual rate ÷ 12) and n is the number of months. Your existing savings keep compounding at the chosen rate, so the required deposit is often lower than a simple split.
Worked example, a $30,000 goal in 5 years starting from $2,000: a plain 0% split needs (30,000 − 2,000) ÷ 60 = $467 a month. At 4% annual return, the monthly rate is 0.003333, (1.003333)⁶⁰ = 1.2210, and the deposit becomes (30,000 − 2,000 × 1.2210) × 0.003333 ÷ 0.2210 = $416 a month. Interest does about $51 a month of the lifting, and the longer the horizon, the more it helps.
Enter your target amount (a house down payment, emergency fund, car, vacation, no goal is too big or small), how much you have already saved (leave it at $0 if starting from scratch), the number of months until your deadline, and the annual interest rate your money will earn (use 0 for a plain cash savings jar).
The calculator shows the monthly deposit needed, your total deposits, and how much interest adds over the life of the plan. Choose your currency from the 25 supported options.
If you already have more saved than the goal requires, the result is a zero deposit, the calculator says so plainly. If you can only save a fixed amount, try different months values until the monthly deposit matches what you can afford; that is your realistic deadline.
The balance is small for most of the time, so interest has little to compound on. At the national-average savings rate of 0.37%, $1,000 earns just $3.70 a year. For $10,000 in 3 years starting from nothing, the deposit is $277 a month and interest adds only about $54 over the whole three years.
Move the same goal to a 4.25% high-yield account and the deposit falls to $262 a month, with interest covering $595 of the goal. That is a real gain, but your deposits still do almost all the work.
The pattern is simple: for goals under about three years, growth barely matters and the deposit does nearly all the work. Past ten years, growth often covers a third or more of the target. Either way, the deposit is the lever that matters, chasing a slightly better rate never beats finding an extra $100 a month.
Time is the cheapest lever. Doubling your deadline usually cuts the required monthly amount by more than half, because growth has longer to work. Required monthly saving to reach a target from $0 at a 4% annual return:
| Goal | In 3 years | In 5 years | In 10 years | In 20 years | |---|---|---|---|---| | $10,000 | $262 | $151 | $68 | $27 | | $25,000 | $654 | $377 | $170 | $68 | | $50,000 | $1,309 | $754 | $340 | $136 | | $100,000 | $2,618 | $1,508 | $679 | $273 |
For $10,000 in one year, a 4.25% rate lowers the deposit only from $833 to $818, the rate is worth $15 a month on a short goal. For a 20-year goal, the same $10,000 needs only $27 a month at 4%: time did the heavy lifting. When the deadline is fixed (a wedding, tuition), prefer a conservative return assumption; when it is flexible, you can afford to assume more and adjust later.
Match the account to the timeline. For a goal within a few years, safety matters more than return, a high-yield savings account or short-term CD protects the money you will soon need. For goals a decade or more away, investing for growth becomes worth the risk, though returns fluctuate and fees and taxes are not included in this calculator.
Add a buffer of 5–10% to the sticker price of your goal. Prices drift up, and a goal reached "almost" is not reached. Emergency funds deserve their own bucket: keep the full emergency fund in a high-yield savings account, separate from the named buckets for each savings goal.
And remember that interest is taxable in most countries, the calculator shows interest before tax, so your real after-tax deposit is slightly higher than shown.
Three levers reach any savings goal: how much you set aside, how long you give it, and the return you earn. Small moves on each add up.
Helps: automate the transfer on payday before you can spend it, pay yourself first. Park the money in a high-yield savings account. Direct windfalls, bonuses, tax refunds, straight to the goal. Start today; every extra month is one more compounding cycle working for free.
Hurts: leaving the cash in a low-rate checking account. Dipping into the fund for unrelated spending. Waiting for a "better time" to begin. Setting a deadline too tight to sustain, a plan you abandon in month three beats no plan, but a plan you keep beats both.
Also apply the classic budgeting yardstick: aim to save 10–20 percent of your income. Start with what you can afford, even $25 a month, and increase gradually with raises or expense reductions. Progress matters more than perfection.
Emergency fund: the standard advice is 3–6 months of essential expenses in a high-yield savings account, untouched except for true emergencies, job loss, medical bills, major repairs. Build a small $1,000 starter fund first, then clear high-interest debt, then build the full fund.
House down payment: with a 10% median down payment on a $417,500 home ($41,750), saving it in 3 years takes about $1,154 a month at the national-average rate, closing costs are extra, so add that buffer.
Car or vacation: shorter timelines mean the deposit does nearly all the work, just split what is left of the price by the months between now and then. For a $1,200 trip twelve months away, that is $100 a month (or $50 a paycheck if you are paid twice a month).
Million-dollar goals: saving $1,000,000 in 10 years from $50,000 needs about $7,917 a month before returns, which is exactly why investing enters the picture for long horizons.
Aim for 10–20% of your income. Start with what you can afford, even $25 a month, and increase gradually with raises or expense reductions. This calculator converts any specific goal into its exact monthly number instead of a rule of thumb.
Monthly deposit = (goal − already saved × (1+i)ⁿ⁾ × i ÷ ((1+i)ⁿ − 1), where i is the monthly interest rate and n is the number of months. With no interest it simplifies to (goal − saved) ÷ months. Your existing savings keep compounding at the chosen rate, lowering the required deposit.
Match it to where the money will sit. A high-yield savings account might earn 3–4%; a diversified index fund has historically averaged more over long periods but varies year to year. For short-term goals (under ~3 years), use a conservative savings rate; 0% models a plain cash jar.
Yes. The amount you have already saved keeps compounding at your chosen rate, so the required monthly deposit is often lower than a simple goal ÷ months split. For example, $2,000 toward a $30,000 goal in 5 years at 4% trims the monthly deposit from $467 to $416.
Nothing breaks, the goal just shifts slightly later, or you catch up with a bigger deposit next month. Rerun the calculator with your current balance as already saved to get a fresh plan whenever life happens. Automating the transfer on payday helps it happen in the first place.
Build a small emergency fund ($1,000) first, then focus on high-interest debt. Once the debt is cleared, build your full emergency fund. Interest on credit-card debt almost always costs more than any savings rate earns, so debt usually wins the race.
If you already have the money, depositing it earlier gives it more time to grow. Most people, though, save from income, and a fixed monthly amount is easier to stick to. The calculator models the monthly pattern; anything extra you add along the way only gets you there sooner.
No, it is an educational estimate using a constant rate of return. Real returns fluctuate, fees and taxes are not included, and savings rates move with the market. Do your own research or talk to a qualified financial advisor before making investment decisions.
Keep short-term goals, anything due within about three years, in a high-yield savings account or short-term CD: safety matters more than return. For goals a decade or more away, investing for growth becomes worth the risk. Emergency funds always stay in high-yield savings.