Savings Withdrawal Calculator
Determine how long your savings will last with regular monthly withdrawals.
Results
Visualization
How It Works
The Savings Withdrawal Calculator shows you exactly how many years your savings will last when you withdraw a fixed amount each month, accounting for interest earned on your remaining balance. This is essential for retirement planning, emergency fund management, and determining whether your nest egg can sustain your desired lifestyle. This tool is designed for both quick estimates and detailed planning scenarios. Results update instantly as you adjust inputs, making it easy to compare different approaches and understand how each variable affects the outcome. For best accuracy, use precise measurements rather than rough estimates, and consider running multiple scenarios to establish a realistic range of expected results.
The Formula
Variables
- Current Balance (B₀) — Your starting savings amount in dollars—the total money you have available to withdraw from
- Monthly Withdrawal (M) — The fixed dollar amount you plan to withdraw each month from your savings account
- Annual Interest Rate (r) — The percentage rate your savings earns annually—typically 4-5% in high-yield savings, lower in regular accounts
- Years Until Depleted — The output showing how many years pass before your balance reaches zero at your withdrawal rate
- Total Interest Earned — The cumulative interest your remaining balance generates during the entire withdrawal period
- Total Withdrawn — The sum of all monthly withdrawals made until the account is fully depleted
Worked Example
Let's say you have $150,000 saved for retirement and plan to withdraw $1,500 per month. Your savings account earns 4.5% annual interest. In month one, your balance grows by $150,000 × (0.045 ÷ 12) = $562.50 in interest, then you withdraw $1,500, leaving $149,062.50. Month two starts with that lower balance earning slightly less interest, and the cycle continues. The calculator runs through this month-by-month until the balance hits zero—in this case, roughly 117 months or about 9.75 years. Over those 9.75 years, you'll withdraw $176,250 total ($1,500 × 117 months), and earn approximately $11,856 in interest on your declining balance, demonstrating how interest continues working in your favor even as you draw down savings.
Practical Tips
- Use a realistic interest rate based on your actual account type—checking accounts earn near 0%, high-yield savings accounts 4-5%, and bonds 4-6% depending on current rates and terms
- If you need your money to last longer than the calculator shows, either reduce your monthly withdrawal amount or increase the interest rate by moving funds to higher-yield accounts
- Run the calculator with different scenarios: try 10% less withdrawal to see if you can extend your runway by years, which often makes a meaningful difference
- Remember this calculator assumes a fixed monthly withdrawal—if you plan to increase withdrawals with inflation (typically 2-3% annually), your money will deplete faster than shown here
- For retirement planning, compare the depletion timeline to your life expectancy estimate plus a safety buffer; most financial advisors recommend your savings last to age 95-100
Frequently Asked Questions
How does interest affect how long my savings last?
Interest works in your favor during withdrawal periods—it reduces your effective spending rate. The higher your interest rate or the longer you wait between withdrawals, the more your remaining balance can grow before the next withdrawal. This is why switching $100,000 from a 0.5% savings account to a 4.5% high-yield account can extend your withdrawal timeline by several years. However, interest only applies to your remaining balance, so as you withdraw money, the interest earned decreases each month.
What if my monthly expenses vary—can I use an average amount?
Yes, using an average monthly withdrawal is reasonable for planning purposes. Calculate your typical annual spending and divide by 12 to get a monthly average. However, the calculator assumes consistent withdrawals, so if your actual spending fluctuates significantly (higher in winter, lower in summer, for example), your actual depletion date may vary. You can run multiple scenarios with different amounts to understand your range of outcomes.
Should I include inflation in my interest rate or withdrawal amount?
Not in this calculator—keep both inputs in current dollars. The interest rate should reflect what your actual account earns (4.5% if in a high-yield savings account, for example). If you want to account for inflation, you would need to increase your monthly withdrawal each year by roughly 2-3%, which means running separate calculator scenarios year-by-year or using a more advanced planning tool. For conservative planning, assume your real purchasing power decreases over time.
What's the difference between total withdrawn and my starting balance?
The difference is the total interest earned during the withdrawal period. If you start with $150,000 and total withdrawals are $165,000, you earned $15,000 in interest while drawing down your account. Conversely, if total withdrawals are less than your starting balance, it means your withdrawals were too high and the account would deplete—which is why this calculator determines the actual depletion point.
Can I use this calculator for college savings or emergency funds?
Absolutely. For a college fund, enter the current balance, the annual tuition and expenses you need to withdraw, and the expected return on your 529 plan or investment account. For an emergency fund, you might model how long $10,000-$20,000 would last at $1,000-$2,000 monthly withdrawals. The calculator works for any scenario where you're systematically drawing down a savings balance over time.
Sources
- U.S. Social Security Administration - Retirement Planning
- Federal Reserve - Consumer Finance: Savings and Withdrawal Strategy
- Investopedia - How Compound Interest Works on Savings Accounts
- Consumer Financial Protection Bureau - Managing Retirement Savings
- IRS Publication 590-B - Distributions from Individual Retirement Arrangements