Savings Goal Calculator

Calculate Savings Goal

$
$
%

Required Monthly Savings

$264.83

Total You'll Contribute

$15,890

See how this is calculated

How This Calculation Works

This calculator works backward from compound interest: instead of asking "how much will I have?", it asks "how much do I need to contribute each month to reach a specific target?" It first projects how much your current savings will grow to on their own by the target date, then calculates the monthly contribution needed to make up the remaining gap.

If your current savings, given enough time and growth, will already reach the goal without any further contributions, the calculator shows $0 required — meaning you're already on track. Otherwise, it solves the future-value-of-an-annuity formula in reverse to find the exact monthly amount needed.

This is especially useful for goals with a fixed deadline — a wedding, a down payment, a big purchase — where you need to know precisely how much to set aside each month rather than just watching a balance grow indefinitely.

Common Mistakes to Avoid

  • Using a growth rate for money you'll need soon. If your goal is less than 2–3 years away, assume little to no investment growth and keep the funds in a safe, liquid account — markets can drop right when you need the money.
  • Not accounting for taxes on growth. If your savings are in a taxable account, investment gains may be taxed, reducing your effective growth rate. Adjust your rate downward accordingly, or use a tax-advantaged account when the goal allows.
  • Setting the deadline too aggressively. A very short timeframe for a large goal can require an unrealistic monthly contribution. If the required amount doesn't fit your budget, consider extending the timeline instead.
  • Forgetting to revisit the plan. Contribution requirements change if your rate of return, timeline, or goal amount shifts. Recalculate periodically, especially after major life or financial changes.

Worked Example

Scenario: A $20,000 goal, starting with $2,000 already saved, expecting a 4% annual return, over 5 years.

Step 1 — Monthly rate: 4% ÷ 12 ≈ 0.333% per month.

Step 2 — Growth of current savings: $2,000 × (1.00333)⁶⁰ ≈ $2,441.

Step 3 — Remaining gap: $20,000 − $2,441 ≈ $17,559.

Step 4 — Required monthly contribution: Solving the annuity formula for this gap over 60 months ≈ $265/month.

Frequently Asked Questions

What if I can't afford the required monthly amount?
Extend your timeline, lower your target goal, or look for ways to increase your expected return (within a reasonable, realistic range) — any of these will reduce the required monthly contribution. Extending the deadline usually has the biggest impact.
Should I assume investment growth for a short-term goal?
For goals under 2–3 years away, most financial planners recommend assuming little or no growth and using a safe savings account, since there isn't enough time to recover from a market downturn right when you need the funds.
How does this differ from the compound interest calculator?
The compound interest calculator projects forward — given a contribution amount, what will you end up with? This calculator works backward — given a target amount and deadline, what contribution do you need? They use the same underlying math, solved for different variables.
What counts as a realistic return rate for a savings goal?
For cash savings, 4-5% (typical high-yield savings account rates) is realistic. For a diversified investment portfolio held over many years, 6–8% is a common conservative assumption, but for short-term goals, sticking with guaranteed, low-risk options is usually safer.

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