How it calculates your monthly amount
The calculator first grows what you already have at the interest rate you enter, subtracts that from the goal, then solves for the fixed monthly deposit that covers the gap. If your savings earn interest, you need to deposit a little less than the simple goal-divided-by-months figure, and the "interest does the rest" line shows how much.
At today's high-yield savings rates (roughly 4%), interest on a two-year goal is meaningful but not huge. The point of entering a rate is accuracy, not magic — the monthly deposit still does most of the work on short horizons.
Choosing a realistic deadline
Try a few timelines. A $20,000 goal over 24 months needs about $720 a month; over 36 months it's about $470. If the 24-month figure isn't realistic, the 36-month plan you'll actually follow beats the 24-month plan you'll abandon. Automate the transfer on payday so the decision is made once.
Where to keep goal savings
Money you'll need within about three years belongs somewhere with no chance of loss: a high-yield savings account, a money market fund, or CDs laddered to your deadline. Stocks can fall 20%–30% in any given year, which is fine for retirement money and a disaster for a down payment you need in 18 months.
Monthly deposit needed
D = (G − S(1 + i)ᵐ) × i / ((1 + i)ᵐ − 1)
- G = goal, S = already saved
- i = APY ÷ 12
- m = months until deadline
Frequently asked questions
+How big should an emergency fund be?
Three to six months of essential expenses is the standard guideline. Single-income households, freelancers and people in volatile industries often aim for six to twelve. Start with one month; it covers most real emergencies.
+Should I save for several goals at once?
Yes, but keep them separate — many banks let you create named sub-accounts or "buckets." Run this calculator for each goal and make sure the combined monthly total fits your budget.
+What if I can't afford the monthly amount?
Extend the deadline, lower the goal, or find the gap elsewhere. Even saving half the calculated amount gets you halfway there, which is far better than not starting.