Retirement Planner

Monte Carlo Retirement Planner

Stress-test your retirement corpus across many market, inflation, tax, and withdrawal paths to understand how resilient the plan may be before you rely on it.

Inputs

Quick Starts

Start from a scenario preset

These are just starting templates. They help you get into the calculator faster before you fine-tune the assumptions to match your own plan.

Profile

Your Profile

Set the retirement timeline first so the calculator knows how long the money grows and how long it must support you.

Current ageYour age today.Retirement ageThe age when retirement withdrawals begin.Life expectancyThe age through which the plan is tested.

Accumulation

Pre-retirement Financials

Define the corpus you already have, how much you save before retirement, and how the portfolio is invested and rebalanced.

Current investable corpusThe retirement corpus already built today.Monthly contribution to corpusMonthly saving added before retirement.Annual contribution increase (%)Expected yearly increase in savings before retirement.Pre-retirement equity allocation (%)Target equity allocation before retirement.

Pre-retirement rebalancing

How often the portfolio is reset to the target mix before retirement.

Retirement

Post-retirement Financials

Set the retirement portfolio mix and any ongoing post-tax income streams such as rent, pension, or annuity income.

Retirement equity allocation (%)Target equity allocation after retirement begins.

Retirement rebalancing

How often the retirement portfolio is reset to the target mix.

Monthly contribution (post tax)Post-tax monthly inflow such as rent, pension, or annuity income.Annual increase in contribution (%)Optional yearly increase in that retirement income stream.

Withdrawals

Withdrawal Strategy

Choose the retirement spending rule below. Each option explains how withdrawals behave over time, and only the relevant inputs appear after you select one.

Withdrawal style

Choose how retirement income should behave over time. Some styles keep spending steady in real terms, while others let spending move with portfolio performance to reduce stress on the corpus.

First retirement year spendingAnnual spending target in the first year of retirement.

Age-based spending glide path

Retirement spending often does not move in one straight line forever. Many people spend a bit more in the early active years, a bit less in the middle years, and then may spend more again later because of healthcare, caregiving, or support costs. Turn this on if you want the calculator to reflect that pattern instead of assuming one flat lifestyle path throughout retirement.

Planning

Planning Assumptions

These are planning assumptions, not predictions. The simulator now uses multi-year market regimes, inflation persistence, and bounded inflation ranges so the paths feel closer to real market cycles.

Expected equity return (%)Long-run annual equity return anchor. The model will still generate strong and weak market phases around it.Equity volatility (%)How large equity swings can be during each market regime.Expected debt return (%)Long-run annual debt return anchor for the debt sleeve.Debt volatility (%)How much debt returns can vary when rate and inflation conditions change.Inflation mean (%)Long-run inflation anchor. The model keeps inflation in a tighter India-like planning band instead of letting it wander unrealistically low every year.Inflation volatility (%)How much inflation can wobble around the anchor before the model pulls it back toward the planning range.

Taxes

Tax Consideration

Turn on a simple retirement tax drag if you want withdrawals to be reduced by estimated tax rates.

Retirement taxes

Add a simplified tax drag on retirement withdrawals.

Simulation

Monte Carlo Simulation Settings

Control how many scenarios are tested and what probability score you want to treat as a successful retirement plan.

Number of simulationsFixed at 100 to keep CPU and memory usage predictable.Minimum probability score for success (%)Used for goal-seeking and for deciding whether the plan clears your success bar.

Stress Test

Retirement Stress Test

Optionally force a weak market start in the first few retirement years. The calculator generates the bad-start return and inflation assumptions automatically from your broader planning setup, so this stays simple.

Early-retirement stress test

Force a bad market start for the first few retirement years to test sequence risk.

About this tool

Monte Carlo Retirement Calculator

A retirement stress-testing calculator that runs many market and inflation paths to estimate how often your corpus may survive through retirement.

Monte Carlo success probabilityMedian and lower-tail corpus bandsRetirement survival curve and representative path

How to use it well

Step 1: Enter the assumptions that best match your situation rather than aiming for false precision.

Step 2: Review the output as a planning scenario, not a guaranteed future outcome.

Step 3: Change one or two variables at a time so you can see which assumptions drive the result.

How the framework works

This page is built to turn a financial question into a more structured planning or research workflow.

The output is best treated as a framework for thinking more clearly about the topic rather than a promise of a specific outcome.

You should still verify assumptions, current market conditions, tax treatment, and personal suitability before acting.

Best used by

Visitors who want a cleaner starting point for a specific money decision.

People who prefer scenario planning over broad generic advice.

Anyone trying to identify which assumptions matter most before moving forward.

Important notes

This page is for educational and informational use only and should not be treated as personal financial advice.

Outputs depend heavily on your assumptions. Small changes to return, inflation, cost, tax, or time-horizon inputs can change the result materially.

Any simplified calculator or ranking model depends heavily on its assumptions and scope.

Important real-world details may still need a second-pass manual review.

The output should support judgment, not replace it.

Quick FAQ

What is Monte Carlo Retirement Calculator for?

A retirement stress-testing calculator that runs many market and inflation paths to estimate how often your corpus may survive through retirement.

Can I rely on this output alone?

No. It is meant to improve your process, not eliminate the need for independent judgment and verification.

What should I do after using this tool?

Review the assumptions, compare a few scenarios, and validate the decision against your own goals, constraints, and latest information.