Savings
Inflation Calculator
Estimate how inflation changes purchasing power over time. Adjust the assumptions to test different scenarios and use the result as a planning estimate, not a promise.
Savings
Inflation Calculator
Result
How to use this calculator
Enter a dollar amount, an average annual inflation rate, and a number of years. The calculator shows two things: the future cost of that amount in today's dollars (what you'd need in the future to match today's purchasing power) and the present value of a future amount (what future money is worth in today's terms). Use it to plan for goals that are years away, stress-test retirement income assumptions, or simply understand how inflation erodes a fixed income or savings balance.
The long-run average US inflation rate is roughly 3% per year, though it varies considerably by decade and category. Grocery prices and housing tend to inflate faster than the CPI average; electronics and clothing tend to inflate more slowly or even deflate. If you're planning for a specific expense category, using the general CPI rate may overstate or understate what you'll actually face.
What your result means
The core insight this calculator makes visible: a dollar in 10 years doesn't buy what a dollar buys today. At 3% annual inflation, $100 today takes $134 in 10 years to buy the same things. At 4%, it takes $148. At 6% (closer to what some categories have experienced recently), it takes $179. For retirement planning, this means income that looks adequate in today's dollars can become inadequate in 20–30 years if it doesn't keep pace with inflation.
Fixed income is the most exposed: a pension that pays $3,000/month with no cost-of-living adjustment has the same real purchasing power at age 65 as it does at 85 only if inflation is zero. In a 3% inflation environment, that $3,000 buys only about $1,660 worth of today's goods by age 85. Social Security includes COLA adjustments; most private pensions do not.
What the math leaves out
Inflation is an average — your personal inflation rate depends on what you buy. Healthcare costs have historically inflated at 2–3x the general CPI, which disproportionately affects retirees. Housing has been volatile. Energy swings sharply year to year. If you're planning for retirement spending that's heavily weighted toward healthcare or housing, using the general 3% CPI assumption will likely underestimate your future costs.
This calculator also doesn't model Social Security's COLA mechanism, inflation-protected investment products like TIPS, or the way some assets (real estate, equities) tend to appreciate faster than inflation over long periods. Inflation is a headwind — but not all financial positions face it equally.
Inflation and retirement planning
Inflation is the sleeper risk in retirement planning. Most people plan for markets going down; fewer plan for the steady erosion of purchasing power over a 20–30 year retirement. The standard mitigation: keep a meaningful allocation to assets that historically outpace inflation (equities, real estate) rather than holding all retirement assets in fixed-income or cash. A portfolio that's 60% equities and 40% bonds has historically outpaced inflation over most 20-year periods; a portfolio that's 100% cash has not.
Frequently asked questions
What inflation rate should I use for retirement planning?
Most financial planners use 2.5–3.5% for general retirement projections, reflecting the Fed's 2% long-run target plus a buffer for uncertainty. For healthcare-heavy retirement budgets, using 4–5% for that portion of expenses is more conservative and realistic. If you've lived through a high-inflation period recently, it's natural to worry — but 30-year planning models typically revert to longer historical averages rather than anchoring to recent peaks.
Does inflation affect Social Security?
Yes, in your favor. Social Security benefits receive an annual cost-of-living adjustment (COLA) based on CPI-W, the consumer price index for urban wage earners. In high-inflation years like 2022–2023, COLAs were 5.9% and 8.7% respectively. This makes Social Security one of the few retirement income sources that automatically keeps pace with inflation — a significant and underappreciated feature.
How has US inflation changed in recent years?
After hovering near 2% for most of the 2010s, US inflation surged to a 40-year high above 9% in mid-2022, driven by supply chain disruptions, energy prices, and pandemic-related demand shifts. The Federal Reserve responded with rapid rate hikes, and inflation declined significantly through 2023–2024. For planning purposes, most projections return to the 2–3% range as a long-run baseline, but recent experience has reminded many planners that inflation surprises are real and worth hedging.