The Green State Credit Union inflation calculator shows what your yearly spending will cost in the future and how much today's dollars will buy by then.
Enter an amount, a yearly inflation rate and a number of years. The result is an illustration of one assumption, not a forecast of what prices will do.
Run it with your real household spending, not your salary.
How does the inflation estimate work?
The calculator multiplies your amount by (1 + the inflation rate) once for every year. That gives the future cost of the same goods. To see buying power, it divides your amount by the same factor, so you learn what today's dollars will be worth then.
Take a hypothetical retired teacher who spends $60,000 per year and assumes 3.5 percent inflation. After 25 years the same lifestyle costs $141,795 per year. Put another way, $60,000 held at that point buys only what $25,389 buys today. Prices don't rise in a straight line in real life, and the tool treats them as if they do, which keeps the arithmetic easy to check.
A fixed pension feels the squeeze first
Look at the pension line before anything else. Many state pensions pay a set amount with a limited cost-of-living adjustment, or none, and the rules differ by state, so check yours. Social Security, if you earned it, has its own adjustment (2.8 percent for 2026 benefits), but that rate says nothing about the years ahead.
Say your pension pays $40,000 per year with no increases and you spend $60,000. Today the gap is $20,000 per year, and your 403(b) or 457(b) covers it. At 3.5 percent for 25 years, spending reaches $141,795 while the pension stays at $40,000. The gap becomes $101,795 per year.
A decision rule you can apply: inflate your spending, subtract only the income that doesn't rise, and look at that gap in years 10, 20 and 25. If the gap in year 25 is more than about five times today's gap, retiring early deserves a harder look.
- Inflate spending, not salary
- Subtract only fixed income
- Check the gap at year 10, 20, 25
Why Green State Credit Union tests more than one rate
No calculator knows your costs. Health care and housing rarely rise at the same speed as a general price index, and taxes on 403(b) withdrawals change what you actually keep. The tool also ignores what your investments earn while prices climb.
Green State Credit Union advisors take an evidence-based view. We don't guess next year's inflation. We run your spending against several rates, set them beside long-term research on diversified portfolios, and look at how withdrawals hold up when prices rise faster than expected. Everything gets rechecked at each check-in.
One honest limit: all investing carries risk, and you can lose money, including what you put in. A plan can make a shortfall less likely, but it can't remove it.
- Uneven price growth by category
- Taxes on withdrawals
- Investment returns and losses
Questions people ask Green State Credit Union
How do I calculate what $50,000 will cost in 20 years?
Multiply $50,000 by (1 plus the inflation rate) 20 times. At an assumed 3 percent, that factor is about 1.81, so the same goods cost roughly $90,500. The inflation calculator does this for you. The rate is an assumption, not a prediction, so try a few.
What inflation rate should I enter for retirement planning?
Pick a rate you wouldn't be surprised by, then test one above and one below it. Nobody can know the future rate. Running three versions shows whether your plan holds up when prices rise faster than you hoped, which matters more than finding one perfect number.
Does the calculator include my pension's cost-of-living increases?
No. It inflates a single amount and nothing else. To account for a pension adjustment, find the rule for your state plan, then compare your inflated spending against the pension's own growth. If the pension doesn't rise, the gap your 403(b) or 457(b) must fill grows every year.
Is buying power the same as future cost?
No. Future cost is how many dollars you'll need later for the same goods. Buying power is what today's dollars will purchase later. They use the same inflation factor, one multiplying and one dividing, so a larger future cost always means smaller buying power for the dollars you hold.
What if I enter 2 percent instead of 3.5?
Your future cost comes out far lower, and the plan looks safer than it is. With the same $60,000 and 25 years, 2 percent gives roughly $98,400 per year, about $43,000 below the 3.5 percent result. That's the difference between a comfortable-looking plan and a thin one.
Rerun the tool at a rate above your guess. If the plan only works at the low number, you've learned something useful before retiring.
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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.