Savings Goal Calculator

A target amount on its own isn't enough to plan around. You also need a deadline (so the math knows how many monthly contributions you'll make) and an expected return (so the math credits the compounding that does part of the work for you). Change any one of the three and the required monthly deposit shifts — sometimes dramatically.

Example: saving $20,000 with a starting balance of $0 at 4.5% APY in 36 months requires about $520/month. Stretch the deadline to 60 months and the same goal needs only about $300/month. Drop the assumed return to 0.5% (a checking account) and 36 months pushes back to about $552/month. The compounding contribution is real, even at modest rates.

If your goal is short (under 12 months), assume close to a 0% return and treat any interest as a small bonus. If your horizon is 3+ years, a high-yield savings account or short-term CD ladder at 4–5% APY can shave 5–10% off the required monthly contribution.

Under 12 months: a high-yield savings account or money-market account. Keep the principal liquid and FDIC-insured. Don't reach for yield at the cost of access — selling a bond or CD early to cover a missed deadline can wipe out the extra interest.

1–3 years: a CD ladder (laddered 3-, 6-, 9-, 12-month CDs) or a US Treasury bill ladder bought directly through TreasuryDirect. Both lock in current yields and remove the temptation to spend the balance.

3+ years: you can mix in conservative bond funds or a target-date fund matched to your goal year, but recognize the principal can fluctuate. For goals that absolutely cannot move (a wedding, a tuition payment), stay in cash equivalents even if the return is lower.

Three knobs to turn: extend the deadline, lower the goal, or boost the return. Extending the deadline is usually safest — adding 12 months to a 36-month plan typically cuts the required monthly contribution by 25–30%.

Lowering the goal sounds painful but is often the right answer for inflated targets — for example, planning a $40,000 wedding when a $25,000 wedding would meet the same priorities. Re-examine what the goal is for before sacrificing other line items in your budget.

Boosting the return is the riskiest knob. Moving from a 4.5% high-yield savings account to a stock-index fund might add 3–4 percentage points of expected return, but the principal can fall 20–30% in a bad year — which is a problem if your goal date arrives during that drawdown. Only stretch for return when the deadline is at least five years out and you can tolerate the timeline slipping.

Goal: $25,000 for a house down payment. Starting balance: $5,000 already in a high-yield savings account. Account APY: 4.5%. Horizon: 48 months.

The starting $5,000 compounding at 4.5% APY for 48 months grows to about $5,985 on its own — so the new contributions only need to cover about $19,015 of the goal.

Required monthly deposit: about $361/month. That's $17,328 of contributions earning about $1,687 in interest, totaling $19,015 added to the starting balance's growth. Total: $25,000 hit at month 48.

Drop the APY to 0.5% (typical brick-and-mortar bank): required monthly deposit climbs to about $412/month — an extra $51/month for the same goal, just because of the wrong account. Stretch the horizon to 60 months at 4.5%: monthly drops to about $288. The two highest-leverage knobs are always the account choice and the deadline.