Retirement Calculator
Retirement planning is one of the most important financial exercises of your life. This calculator estimates how much you need to accumulate to maintain your desired monthly income in retirement, how much you will have with your current savings and monthly contributions, and what you should contribute to close the gap. The earlier you start, the less monthly effort you'll need thanks to the power of compound interest.
At age 30, retiring at 65, life expectancy 85, 50,000 saved, contributing 2,000/month, 7% return, and 4% inflation:
- Needed at retirement: ≈ 2,733,041
- Projected by 65: ≈ 4,177,417
- Surplus: ≈ 1,444,376 (the plan overshoots the goal)
- Required contribution for the goal: ≈ 1,198/month
- Real return (after inflation): ≈ 2.88%
Formulas
Savings needed ≈ Annual retirement expenses × 25
Needed = Monthly income × [1 − (1 + real monthly rate)^(−retirement months)] / real monthly rate
Projected = Current savings × (1 + i)^n + Monthly contribution × [((1 + i)^n − 1) / i]
The calculator uses a real rate (nominal return minus inflation) to discount your retirement years. That is why the "needed" figure comes out below the 25x rule: it assumes your money keeps earning while you spend it.
Step-by-step example (calculator defaults)
- Years to save: 65 − 30 = 35 years (420 months).
- Years in retirement: 85 − 65 = 20 years.
- Real rate: (1.07 / 1.04) − 1 ≈ 2.88% per year.
- Needed: 15,000/month for 20 years discounted at 2.88% ≈ 2,733,041.
- Projected: 50,000 today plus 2,000/month at 7% nominal ≈ 4,177,417.
- Result: a surplus of ≈ 1,444,376; just 1,198/month would hit the goal.
Scenario table (same engine logic)
Goal of 15,000/month (≈ 2,733,041 at 65, no starting savings except the default case).
| Starting age | Monthly contribution | Return | Projected | vs. goal |
|---|---|---|---|---|
| 25 | 2,500 | 7% | 6,562,033 | +3,828,993 |
| 30 | 2,000 | 7% | 3,602,109 | +869,069 |
| 30 | 2,000 | 5% | 2,272,185 | −1,001,634 |
| 40 | 8,500 | 7% | 6,885,609 | +4,152,569 |
| 25 | 1,000 | 7% | 2,624,813 | −108,227 |
Interpreting the result
- Starting young is the cheapest lever: at 25 with 2,500/month you finish well ahead; at 40 you need 8,500/month for a similar goal. Every delayed year is paid with higher contributions.
- Return matters almost as much as contributions: at 7% the default projects 4.18M; at 5% only 2.27M, below the goal. Do not assume double-digit returns.
- In Guatemala, social security (IGSS) is a supplement, not the whole plan: the pension typically covers only a fraction of your last salary. Combine savings accounts, certificates of deposit, investment funds, and real estate according to your profile.
- Inflation is the silent enemy: at 4% annual inflation, purchasing power halves in about 18 years. The engine already accounts for it through the real rate.
This tool is an educational estimate: it excludes taxes on withdrawals, instrument fees, salary changes, irregular contributions, and specific investment decisions. Historical returns do not guarantee future results. For Guatemala, verify IGSS pension requirements and amounts with the official source before making decisions.
Frequently asked questions
It depends on your desired income, retirement age, and life expectancy. With the defaults (15,000/month at 65), you need ≈ 2,733,041; the calculator tells you whether your current plan reaches it or how much to add.
As early as possible. Thanks to compound interest, starting at 25 with 2,500/month beats the goal, while at 40 you would need 8,500/month for the same target.
The default uses 7% nominal (≈ 2.88% real with 4% inflation). Historically, a diversified portfolio returns in an indicative 6–8% nominal range; much higher returns mean more risk.
It is never too late, but each passing year makes the goal harder. If you are 50 with no savings, focus on reducing future expenses and maximizing savings in your remaining working years; the calculator shows the contribution needed.
Related calculators
- Compound interest: project the growth of your contributions
- Savings goal: how much to contribute for a target with a deadline
- Monthly savings: how much you can set aside each month
- Inflation: the effect of rising prices on purchasing power
- Effective annual rate: compare the real cost of instruments
- Monthly budget: free up room for savings in your expenses