Green State Credit Union's calculator shows how long your money will last in retirement, based on your savings, first-year withdrawal, expected return and yearly inflation raise. It also gives your withdrawal rate and the total you take out.
Enter your own numbers above and change one at a time. The result is an illustration, not a forecast, and the sections below explain what it means for a teacher or school employee with a pension and a 403(b) or 457(b).
How does the estimate work?
The math is plain. Each year your balance earns the return you entered, then your withdrawal comes out. The next year's withdrawal is the last one raised by your inflation figure, so your spending power stays level. The calculator repeats this until the balance hits zero.
Here's a hypothetical. A retired teacher has $800,000 in a 403(b), takes $36,000 in year one (4.5 percent of savings), assumes 4.5 percent a year for illustration and raises withdrawals 2.5 percent a year. The money lasts 31 years, and the final withdrawal is only $31,667 because the balance runs out partway through.
Reading your result when you have a pension
Enter only the gap. Your state pension, and Social Security if you pay into it (some public employees don't, so check your statement), cover part of your spending. The calculator should see just the amount your 403(b) or 457(b) must supply.
Then apply one rule. Count the years from your retirement age to age 95. Someone retiring at 62 needs 33 years, so the 31-year example above falls two years short. A result that reaches 95 is comfortable. One that stops in your 80s deserves a closer look before you set a retirement date.
Notice the shape, too. In the example, the balance barely moves for the first eight years, then drops faster. Late years do the damage.
- Result past age 95: comfortable
- Result into the late 80s: look closer
- Result before age 85: change something
What the calculator leaves out
It uses one steady return every year. Real markets don't, and a bad first few years hurts more than the same losses later, because you're selling while prices are down. All investing carries risk, and you can lose money, including what you put in.
It also skips taxes. Withdrawals from a traditional 403(b) or 457(b) count as ordinary income, and required minimum distributions begin at age 73 (age 75 if you were born in 1960 or later). A Roth balance behaves differently.
At Green State Credit Union, the approach is evidence-based. Advisors don't guess next year's return. They test your plan against a range of long-run assumptions, keep the portfolio diversified, and estimate the tax cost before suggesting any change. Clients get that work at check-ins, and an intro call is the way to begin.
Questions people ask Green State Credit Union
Is a 4.5 percent withdrawal rate safe?
No rate is safe in every market. A 4.5 percent first-year withdrawal, raised for inflation, lasted 31 years in this calculator's example at an assumed 4.5 percent return. Lower returns or early losses shorten that. Treat the rate as a starting point and test it with several return assumptions.
Does the calculator count my state pension?
No, it only models the account you enter. Subtract your pension and any Social Security from your yearly spending, and enter the remaining gap as the first-year withdrawal. That shows how long your 403(b) or 457(b) alone must carry you.
What return should I enter?
Use a modest figure you could defend over decades, and try a lower one as well. A portfolio holding stocks and bonds rarely earns one steady number. Running three values, such as 3, 4.5 and 6 percent, shows how sensitive your result is.
Why does the money last fewer years when inflation is higher?
Each year's withdrawal is raised by the inflation figure, so higher inflation means larger withdrawals and a faster drain on the balance. Even a half-point difference compounds over 25 or 30 years, which is why the calculator lets you change it.
Entering your full spending as the withdrawal
Putting total yearly spending in the withdrawal box is the input error we see most. Say a hypothetical couple spends $60,000 per year, but pension income covers $24,000 of it. Entering $60,000 on $800,000 of savings shows a 7.5 percent withdrawal rate and a frightening result. The real gap is $36,000.
The opposite slip is setting the inflation raise to zero. It makes the money look like it lasts longer than it will.
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This is general information, not personalized investment, tax, or legal advice. Investing involves risk, including loss of principal. Before making decisions about your retirement or investments, consult a qualified professional about your own circumstances.