How Long Will Your Retirement Money Last Calculator
'/%3E%3Ccircle cx='48' cy='39' r='19' fill='%23f2c9a5'/%3E%3Cpath d='M27 35c3-16 39-17 42 2-8-8-27-9-42-2z' fill='%23374151'/%3E%3Cpath d='M21 86c5-24 49-28 56 0z' fill='%232563eb'/%3E%3Ccircle cx='41' cy='41' r='2' fill='%23111827'/%3E%3Ccircle cx='55' cy='41' r='2' fill='%23111827'/%3E%3Cpath d='M42 52c4 3 9 3 13 0' stroke='%2392400e' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E)
Reviewed by Calculator Editorial Team
Retirement planning is a critical financial decision. Our calculator helps you estimate how long your retirement savings will last based on your current balance, expected annual withdrawals, and assumed annual return rate. Understanding your retirement timeline can help you make informed decisions about saving, investing, and spending in retirement.
How This Calculator Works
The calculator estimates how long your retirement savings will last by simulating annual withdrawals from your account balance. It assumes your savings grow at a fixed annual rate, which may not reflect real market conditions. The result is an estimate that helps you plan your retirement strategy.
The calculation continues until either:
- The account balance reaches zero, or
- The maximum number of years (100 by default) is reached
This approach provides a simplified view of your retirement timeline, but it doesn't account for inflation, taxes, or changes in your spending habits.
The Formula
The calculation is performed using the following steps:
- Start with your initial retirement savings balance
- For each year:
- Calculate the annual return:
balance × (annual return rate / 100) - Add the return to the balance:
balance = balance + (balance × annual return rate / 100) - Subtract the annual withdrawal amount from the balance:
balance = balance - annual withdrawal
- Calculate the annual return:
- Repeat until the balance reaches zero or the maximum years is reached
Formula: The calculator uses iterative annual calculations to estimate how long your savings will last.
Worked Example
Let's say you have $500,000 in retirement savings, plan to withdraw $40,000 annually, and expect a 4% annual return. Here's how the calculation works:
| Year | Starting Balance | Annual Return | Balance After Return | Withdrawal | Ending Balance |
|---|---|---|---|---|---|
| 1 | $500,000.00 | $20,000.00 | $520,000.00 | $40,000.00 | $480,000.00 |
| 2 | $480,000.00 | $19,200.00 | $499,200.00 | $40,000.00 | $459,200.00 |
| 3 | $459,200.00 | $18,368.00 | $477,568.00 | $40,000.00 | $437,568.00 |
In this example, your savings would last approximately 20 years before being depleted. The actual duration may vary based on market conditions and other factors.
Assumptions
The calculator makes several important assumptions:
- Your savings grow at a fixed annual rate
- You withdraw a fixed amount each year
- There are no additional contributions to your retirement account
- Inflation and taxes are not accounted for
- The market return matches your assumed annual rate
Note: These assumptions may not reflect your actual retirement experience. Consult with a financial advisor for personalized advice.
FAQ
How accurate is this retirement duration estimate?
The estimate provides a simplified view of your retirement timeline. Actual results may vary based on market conditions, inflation, taxes, and changes in your spending habits. It's always wise to consult with a financial advisor.
Does this calculator account for inflation?
No, this calculator does not adjust for inflation. You may want to consider inflation when planning your retirement withdrawals.
What if my savings grow at different rates in different years?
This calculator assumes a fixed annual return rate. If your savings experience varying returns, the actual duration may differ from the estimate.
Can I use this calculator for other types of savings?
Yes, you can use this calculator to estimate how long any savings account will last with regular withdrawals, not just retirement accounts.