Retirement Withdrawal Calculator

How This Calculator Works

The calculator no longer claims to run Monte Carlo or asks AI to create the numbers. A deterministic engine applies documented assumptions for inflation, allocation, Social Security timing, and retirement horizon; AI can only turn those outputs into a readable explanation.

What Does AI Do Now?

AI writes the explanation only. The withdrawal amount, withdrawal rate, confidence band, horizon, assumptions, and warnings are generated before the AI step by the deterministic engine.

Why This Matters

The order of returns matters more than average returns.

Our calculator accounts for this “sequence of returns risk” through documented assumptions and warning flags, not by letting AI invent a rate.

What Makes Our Calculator Different

1. Uses Current 2026 Market Data

Most calculators use the old 4% rule from 1994. That rule assumed:

• Bond yields of 7-8% (now: 4-4.5%)
• Stock P/E ratios of 15x (now: 22-25x)
• 30-year retirements (many need 40+ years)

Our calculator adjusts for today's reality. That's why we typically recommend 3.3-3.8% instead of 4%.

2. Accounts for Your Specific Situation

Your safe withdrawal rate depends on:

• Your age: 65-year-old vs 55-year-old needs different rates
• Portfolio allocation: 80% stocks vs 50% stocks = different risk
• Other income: Social Security changes everything
• Spending flexibility: Can you cut 10% in a crash?

3. Factors in Inflation

Your $4,000/month spending today becomes $6,500/month in 20 years (assuming 2.5% inflation). We adjust for this automatically.

Understanding Your Results

What does the confidence band mean?

The confidence band is a heuristic on a 0–100 scale, set from documented assumptions in the deterministic engine (your inputs, time horizon, allocation, and stress-test gap). It is not a probability of success drawn from Monte Carlo simulations and it should not be read as a literal success rate.

Adjusting Your Withdrawal Rate

The calculator gives you a starting point. You can adjust based on:

• Lower rate (more conservative): If you have no other income, can't cut spending, or just want extra security
• Higher rate (more aggressive): If you have Social Security, pension, or can reduce spending 10-20% in bad markets

Common Questions

Why is my rate lower than 4%?

The 4% rule worked historically, but current market conditions (high valuations, lower bond yields) suggest 3.3-3.8% is safer for retirements starting in 2026.

What if markets crash right after I retire?

The engine runs a documented “market stress” scenario alongside your base case. It re-applies the deterministic withdrawal math under an adverse return assumption so you can compare outcomes before retiring. It is not a Monte Carlo probability of failure — see the methodology page for what the engine does and does not do.

Should I use the same rate every year?

No! Smart retirees use dynamic withdrawal strategies:

• If markets crash 20%: Cut spending 10% temporarily
• If markets boom: You can spend a bit more
• Adjust based on portfolio performance

Beyond the Calculator: What's Next?

Once you know your safe withdrawal rate, here's what to do:

1. Decide Which Accounts to Withdraw From

Order matters! Withdraw from taxable accounts first, then Traditional IRA/401k, then Roth IRA last.

Learn a common withdrawal order →

2. Plan for Required Minimum Distributions (RMDs)

At age 73, you must start withdrawing from Traditional 401k/IRA. This affects your strategy.

3. Build a Cash Buffer

Keep 1-2 years of expenses in cash/money market. During crashes, use this instead of selling stocks at a loss.

4. Review Annually

Your safe withdrawal rate isn't set in stone. Review every year and adjust if:

• Your portfolio grows significantly
• Markets crash
• Your expenses change
• You add other income sources (Social Security, part-time work)

Real-World Example

The Bottom Line

This calculator gives you a personalized, data-driven withdrawal rate based on YOUR situation and current market conditions—not generic 1994 advice.

Use it to:

• Find your safe starting withdrawal rate
• Understand how market conditions affect your plan
• Compare different scenarios (retiring now vs 2 years from now)
• Make informed decisions about when you can afford to retire

🎯 Knowledge is power. Knowing you can safely withdraw $3,200/month vs guessing lets you actually enjoy your retirement instead of worrying about every purchase.