How the Retirement Calculator Works
This calculator models two phases of your financial life: the accumulation phase (saving and investing until retirement) and the drawdown phase (spending your savings in retirement). It projects your total savings at retirement, estimates how many years your funds will last, and calculates a safe monthly income using the 4% rule.
Enter your current age, target retirement age, savings, monthly contribution, expected returns, and planned spending to see your complete retirement projection.
Disclaimer: This calculator provides estimates for educational purposes. Actual results depend on market performance, inflation, and personal circumstances. Consult a financial advisor for personalized retirement planning.
Understanding Retirement Planning
Retirement planning is about ensuring your savings can support your lifestyle for 20-30+ years without a regular paycheck. The earlier you start saving, the more compound interest works in your favor.
The 4% Rule
The 4% rule is a widely-cited guideline suggesting you can withdraw 4% of your retirement savings in the first year, then adjust for inflation each subsequent year, and your money should last approximately 30 years. For example, with $1,000,000 saved, you could withdraw $40,000 per year ($3,333/month). This calculator uses the 4% rule to estimate your safe monthly income.
Accumulation vs. Drawdown
- Accumulation phase: Your working years when you save and invest. Contributions plus compound returns build your nest egg.
- Drawdown phase: Retirement, when you withdraw from savings. Your remaining balance continues to earn returns, but withdrawals gradually reduce it.
Key Factors That Affect Retirement
- Time horizon: Starting at 25 vs. 35 can double your final savings due to compound growth
- Contribution rate: Even small monthly increases make a big difference over decades
- Rate of return: A diversified portfolio historically returns 7-10% annually before inflation
- Retirement spending: Many people spend 70-80% of their pre-retirement income
- Inflation: Plan for rising costs — what costs $4,000/month today may cost $7,200 in 20 years at 3% inflation
Frequently Asked Questions
How much do I need to save for retirement?
A common target is to have 25 times your annual expenses saved by retirement (based on the 4% rule). So if you need $48,000/year, aim for $1,200,000. Use this calculator to see if your current savings rate puts you on track.
What return rate should I use?
A 7% annual return is a reasonable estimate for a diversified stock/bond portfolio, based on historical averages adjusted for inflation. Conservative investors might use 5-6%, while aggressive investors might use 8-10%.
Does this account for Social Security or pensions?
This calculator models personal savings only. If you expect Social Security or pension income, you can reduce your "Monthly Spending in Retirement" by that amount to see how long your personal savings need to last.