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Summary
A savings goal calculator answers: “How much must I save each month to reach my target?” or “How long will it take at my current savings rate?” It uses the future value of an ordinary annuity formula with monthly compounding, factoring in a starting balance and expected return rate.
How it works
The calculator solves for either the required monthly contribution (PMT) or the time to reach the goal:
PMT = (Target - PV x (1 + r)^n) x r / ((1 + r)^n - 1)
Where PV = current savings, r = monthly rate (annual / 12), n = months, Target = goal amount.
US savings vehicles and typical rates
| Vehicle | Typical rate (2026) | FDIC insured | Best for |
|---|---|---|---|
| Regular savings account | 0.39% APY | Yes ($250k) | Emergency fund, short-term |
| High-yield savings (online) | 4.0-5.0% APY | Yes ($250k) | Goals 1-3 years out |
| Certificate of Deposit (CD) | 4.0-4.5% APY | Yes ($250k) | Fixed timeline, no withdrawals needed |
| Money market account | 3.5-4.5% APY | Yes ($250k) | Higher balances, check-writing |
| I Bonds | 2.4% (inflation-adjusted) | Treasury-backed | Long-term inflation protection ($10k/yr limit) |
The national average savings rate of 0.39% (FDIC) means most Americans earn almost nothing on savings. Moving to a high-yield savings account at 4-5% dramatically changes outcomes.
Common US savings goals
- Emergency fund: 3-6 months of expenses ($12,000-$36,000 for median household)
- House down payment: 20% of median home ($396,800 x 0.20 = $79,360)
- College fund: ~$110,000 for 4 years at a public university (529 plan)
- Car purchase: $25,000-$35,000 average new car price
Worked example
$79,360 down payment goal, $15,000 current savings, 5 years, 4.5% HYSA:
- Monthly rate: 4.5% / 12 = 0.375%
- Future value of $15,000: $15,000 x (1.00375)^60 = $18,782
- Gap to fill from contributions: $79,360 - $18,782 = $60,578
- Annuity factor: ((1.00375)^60 - 1) / 0.00375 = 66.914
- Required monthly savings: $60,578 / 66.914 = $905.30/month
- Total contributions: $15,000 + ($905.30 x 60) = $69,318
- Interest earned: $79,360 - $69,318 = $10,042
Save $905.30 per month in a high-yield savings account to reach $79,360 in 5 years.
Key differences from other markets
- FDIC insurance at $250,000 per depositor per bank provides robust protection for goal-based savings. Joint accounts are insured to $500,000. The UK FSCS limit is 85,000 pounds.
- No equivalent to the UK Lifetime ISA (25% government bonus on savings toward a first home). US first-time homebuyers have no direct government savings bonus, though FHA loans allow 3.5% down payments as an alternative path to homeownership.
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