Deadline math beats wishful saving
“Save more” fails because it has no number; a goal divided into an automatic monthly transfer succeeds because it has nothing left to decide. This calculator gives you that number, and the breakdown shows something motivating: how much of the goal your existing savings and compound interest cover on their own. On a five-year goal at 4%, interest quietly contributes several percent of the target — and on longer horizons, far more (see the compound interest calculator for how that snowballs).
Making the number stick
- Automate on payday — a transfer the day after income lands never gets spent first.
- Name the account — “House down payment 2031” is measurably harder to raid than “Savings 02”.
- Recalculate on every change — a raise, a rate change, a windfall: 30 seconds here keeps the plan honest instead of stale.
- If the number doesn’t fit the budget — stretch the deadline or trim the goal. A plan you can’t execute isn’t a plan.
Frequently asked questions
How is the monthly amount calculated?
The calculator grows your current savings at your rate until the deadline, subtracts that from the goal, and spreads the remainder across the months — accounting for the interest each future deposit will itself earn. It’s the standard future-value-of-annuity formula, solved for the payment.
Where should goal money be kept?
Match the vehicle to the deadline. Under ~3 years: high-yield savings or a CD matched to the date — you can’t afford a market dip right before you need the money (a CD ladder works well for known dates). 3–10 years: a conservative mix. 10+ years: mostly stock index funds, since time absorbs the volatility.
What rate should I enter?
The realistic yield of wherever the money will actually sit: your savings account’s current APY for short goals (often 3.5–4.5% in recent years), a blended figure like 5% for mixed portfolios, ~7% for long-horizon stock investing. When in doubt, use a lower rate — arriving early beats arriving short.
Should I save for several goals at once?
Yes, but give each goal its own line (many banks allow sub-accounts or “buckets”). One pooled pot invites borrowing from the vacation fund for the car repair. Run this calculator per goal and check that the total monthly amount fits your budget; if not, the honest move is stretching deadlines, not hoping.
Emergency fund first or the goal first?
Emergency fund first — typically 3–6 months of essential expenses in instant-access savings. Without it, any surprise expense raids your goal savings (or worse, lands on a credit card at 25% APR, which undoes years of 4% interest).