How to Calculate Your Savings Goal
Calculating a savings goal works backwards from a future target. Given a target amount, time horizon, and expected return, you can solve for the monthly contribution needed:
FV = P × (1 + r)^n + PMT × ((1 + r)^n − 1) / r- FV — future value (your target)
- P — present savings
- PMT — monthly contribution (what we solve for)
- r — monthly return rate
- n — total number of months
Example: To reach $1,000,000 in 25 years starting from $10,000 at a 7% annual return, you'd need to save about $1,070/month. Of that final balance, more than half comes from investment growth — not contributions.
How Much Should You Save Each Month?
There's no single right number — it depends on income, goals, and time. Common benchmarks:
- 50/30/20 rule: 50% needs, 30% wants, 20% savings.
- Retirement: aim for 15% of gross income, including any employer match.
- Emergency fund: 3–6 months of expenses in cash.
- Big purchases: work backwards from cost ÷ months to deadline.
Use the calculator above to translate any target into a precise monthly number.
How Compound Interest Helps You Grow Savings
Compound interest means your returns earn returns. Over decades, this snowball effect often contributes more to your final balance than your actual contributions.
Example: Save $500/month for 30 years at 7%. You contribute $180,000 but end with about $610,000 — over $430,000 of pure growth. The dashed line on the chart above shows what you'd have without growth — the gap is compounding.
Want a deeper dive? See our guide to how compound interest works or the formula explained.
How to Reach Financial Goals Faster
Five practical levers, in rough order of impact:
- Start earlier. Time is the single biggest factor. Five extra years can cut your monthly amount in half.
- Increase the rate. Moving from cash to a diversified portfolio can dramatically lift returns over decades.
- Automate contributions. Pay yourself first — set up automatic transfers on payday.
- Cut high-interest debt. Paying off a credit card at 20% beats earning 7% in stocks.
- Increase income. Even a small raise, fully saved, accelerates everything.
Frequently Asked Questions
How much should I save each month?
It depends on your target, timeline, and expected return. A common starting point is 20% of income, but the calculator above gives you the exact monthly number for your specific goal.
How do I reach my savings goal faster?
Save more, start earlier, invest in higher-return assets, automate contributions, and reinvest gains. Time is the most powerful lever.
What return rate should I use?
Historical averages: stocks ~7%, bonds ~3%, cash ~0–2%. A balanced portfolio often uses 5–7%. Be conservative for short horizons.
Does inflation affect my savings?
Yes — $1M in 30 years won't have today's purchasing power. Use the inflation field above to see your target in today's dollars.
Is this calculator accurate?
Yes — it uses the standard future-value-of-an-annuity formula. Actual returns vary, so treat results as a long-term projection.
Can I use this for retirement planning?
Yes. Set the target to your retirement nest egg (e.g. 25× annual expenses) and the time period to years until retirement.