Monte Carlo Retirement Simulator
Run 10,000 probabilistic scenarios to understand the full range of retirement outcomes. Unlike simple calculators, this shows how market volatility and sequence risk affect your future.
Your Timeline
Savings & Expenses
Return Assumptions
Ready to Simulate
Adjust the parameters on the left and click "Run Simulation" to see your retirement outcomes.
What is Monte Carlo Simulation?
Monte Carlo simulation is a statistical technique that runs thousands of scenarios with random market returns to model the uncertainty in retirement planning. Unlike traditional SIP calculators that show a single outcome based on average returns, Monte Carlo reveals the full spectrum of possibilities.
Why Traditional Calculators Fall Short
Most retirement calculators assume you'll get exactly 12% returns every year. In reality, markets are volatile - you might get +30% one year and -20% the next. The sequence of these returns matters enormously, especially in early retirement. This is called sequence risk.
How to Use This Tool
- Enter your current age, retirement age, and life expectancy
- Input your current savings and monthly SIP amount
- Set your expected monthly expenses in retirement
- Choose return assumptions (use presets for guidance)
- Click "Run Simulation" to see 10,000 possible outcomes
Understanding Your Results
- Success Rate: The percentage of scenarios where your money lasts through life expectancy. Aim for 80%+ for a comfortable retirement.
- Fan Chart: Shows the range of outcomes. The wider the fan, the more uncertainty in your plan.
- Percentiles: The 10th percentile is the worst case (bottom 10%), 50th is median, 90th is best case (top 10%).
- Histogram: Distribution of final portfolio values across all scenarios.
Why This Tool is Unique
Unlike generic calculators on Moneycontrol, Groww, or ET Money, this Monte Carlo simulator uses Geometric Brownian Motion to model realistic market behavior. It accounts for volatility, sequence risk, and inflation-adjusted expenses. This is the same methodology used by professional financial planners.
Tips for Better Retirement Planning
- Target a success rate above 85% for peace of mind
- Reduce portfolio volatility as you near retirement (shift to debt/bonds)
- Build a cash buffer (2-3 years of expenses) before retiring
- Be flexible with withdrawal amounts in down markets
- Consider part-time work or delayed retirement if success rate is low