How to Use This Calculator
- 1
Name your target
Enter the total you're saving toward — a house down payment, a wedding, a car, an emergency fund. Being specific makes the monthly number feel real.
- 2
Count what you already have
Add any money currently set aside for this goal. It gets a head start on earning interest, so every dollar here shrinks your required monthly deposit.
- 3
Set your deadline
Enter how many years you have. Deadlines are the biggest lever: the same $50,000 goal needs roughly twice the monthly deposit over 3 years as over 6.
- 4
Estimate your return
For short-term goals kept in a high-yield savings account, the advertised APY — around 4% recently — is the right number. Use something lower to be conservative.
- 5
Automate the answer
The result is your action item. Set up an automatic transfer for that amount on payday and the goal essentially funds itself.
How It Works
The calculator answers the question backwards. First it figures out how far your existing savings will get on their own, letting them compound untouched until the deadline. Whatever gap remains must be filled by monthly deposits — and because each deposit also earns interest from the day it lands, the required amount is smaller than simply dividing the gap by the number of months.
where the gapis your goal minus the projected future value of today's savings, i is the monthly interest rate, and n is the months until your deadline. The fraction is the classic future-value-of-annuity relationship run in reverse: instead of asking what a stream of deposits grows into, it asks what stream of deposits grows into a known target. If your rate is 0%, it simplifies to the gap divided evenly across the months.
Worked example
Goal: $50,000 in 5 years, with $5,000 already saved and a 4% annual return.
Left alone, the $5,000 compounds to about $6,105 — so your deposits only need to build the remaining $43,895.
Spread over 60 months with interest helping, that takes about $662 per month. In the end you contribute roughly $39,724, and interest covers about $5,276 of the goal — money the bank adds for you.
Frequently Asked Questions
How big should my emergency fund be?
The standard advice is 3 to 6 months of essential expenses — rent or mortgage, food, utilities, insurance, and minimum debt payments. If your essentials run $3,500 a month, that's a target of $10,500 to $21,000. Lean toward 6 months if your income is variable, you're self-employed, or you're the sole earner. Start with a $1,000 mini-fund, then build toward the full cushion.
Where should I keep money I'm saving for a goal?
For anything you'll need within a few years, stick to FDIC-insured options: a high-yield savings account for flexibility, certificates of deposit if you can lock the money up, or a money market account for check-writing access. All currently pay in the 4–5% range. Skip the regular big-bank savings account — many still pay under 0.1%, which costs you hundreds a year on a five-figure balance.
What APY is realistic to assume right now?
Online high-yield savings accounts have recently paid around 4–4.5% APY, and 12-month CDs land in a similar band. Rates float with the Federal Reserve, so they can drift down over a multi-year goal. A practical approach: plug in today's APY for a baseline, then rerun the numbers at 3% to see how much your monthly deposit would need to rise if yields fall. Planning slightly conservative beats coming up short.
Should I save or invest for a goal that's under 5 years away?
Save, don't invest. Stocks average solid returns over decades, but over any given 5-year stretch they can fall 30% or more — the S&P 500 dropped about 19% in 2022 alone. If your down payment is due in 3 years, a crash at the wrong moment could derail the whole plan. The 4%-ish guaranteed yield of a savings account or CD is the price of certainty, and for short timelines it's worth paying.
What is the 50/30/20 budget rule?
It's a simple way to split after-tax income: 50% to needs (housing, food, transportation, insurance), 30% to wants (dining out, travel, hobbies), and 20% to savings and extra debt payments. On a $5,000 monthly take-home, that's $1,000 a month flowing to goals — enough to cover the $662 monthly deposit from our worked example with room to spare. Treat the percentages as a starting point and tighten the wants category when a deadline looms.
How do I actually stay consistent with saving every month?
Remove yourself from the decision. Schedule an automatic transfer from checking to a dedicated savings account for the day after each payday, so the money moves before you can spend it. Keep the account at a separate bank to add friction against dipping in, and name it after the goal — “House 2029” is harder to raid than “Savings.” When you get a raise, bump the transfer before lifestyle creep absorbs it.