Savings Goal Calculator
Find the exact monthly deposit that reaches your savings goal on time, given what you have already saved and the interest rate your money earns along the way.
High-yield savings pays ~4%; stock-heavy investing averages ~7% long term.
The most reliable way to hit this number is automating the transfer on payday, before spending happens. A goal that depends on month-end leftovers rarely gets funded.
Work backwards, not forwards
Most saving fails at the design stage. “Save what’s left over” produces whatever the month decides — usually little. The version that works runs in the opposite direction: name the amount, name the date, and let the arithmetic set the monthly figure.
That figure is the entire output of this calculator, and its value is that it forces one of three honest responses: the number fits your budget, or the deadline moves, or the goal shrinks. All three beat drifting.
Growth quietly does part of the job
Two things reduce the monthly amount below naive division. Your existing savings keep compounding the whole time — the calculator grows them first and only asks your deposits to cover the gap. And each deposit earns interest from the month it lands, so the later years partially fund themselves.
At today’s high-yield savings rates the effect is modest but real; over longer horizons it grows into the dominant force, which the compound interest calculator shows in its year-by-year chart. If your result says $0 per month, your current savings already grow past the target — aim higher or sooner.
Match the account to the deadline
The rate you enter should come from where the money will actually sit, and that choice follows the timeline:
- Under ~5 years — high-yield savings or CDs, FDIC-insured. The point of a down payment fund is that it is definitely there; a market dip in the wrong year is the one risk you cannot schedule around.
- Longer horizons — investing becomes reasonable, and the higher assumed rate meaningfully shrinks the monthly requirement.
One ordering rule sits above all of this: an emergency fund and a full 401(k) match come before named savings goals. The first protects the plan from surprises; the second is an instant return no savings account will ever match.
Automate it or lose it
The mechanical part is the part people skip. Schedule the transfer for payday — not month-end — into an account you do not see daily. A goal funded by leftovers gets funded at the rate leftovers occur, which for most households is approximately never. The CFPB’s savings research says the same thing in more words: the households that save are the ones that made it automatic.
How this is calculated
target = current × (1+r)^n + monthly × ((1+r)^n − 1) ÷ r solved for the monthly deposit, where r = rate ÷ 12 and n = months. Growth on your existing savings is counted first; the monthly amount only has to cover what growth doesn't.
Frequently asked questions
- How much should I save each month?
- Work backwards from a named goal rather than forwards from a rule of thumb. A target amount, a deadline and a rate produce an exact monthly figure — which is either affordable, or tells you to adjust the goal or the timeline. That decision is the whole value of doing the math.
- What rate should I assume?
- Match it to where the money will sit. High-yield savings accounts have recently paid around 4%; certificates of deposit similar; a stock-heavy portfolio averages about 7% after inflation over long periods but swings hard year to year. For short-term goals, use the savings account rate.
- Should short-term savings be invested in stocks?
- Generally not for goals under about five years. Stocks average well, but a 20% drop in the year you need the house down payment converts an average into a catastrophe. The interest you give up by staying in savings accounts is the price of the money definitely being there.
- How big should an emergency fund be?
- Three to six months of essential expenses is the standard band — more with irregular income, dependents or a single-earner household. It comes before other savings goals because it is what keeps a job loss or a transmission failure from landing on a credit card at 25%.
- Where should goal savings live?
- Somewhere separate from checking, ideally at a different bank — friction against casual spending is a feature. FDIC-insured high-yield savings for anything under five years; investment accounts for the long-dated goals like a far-off home purchase.