Your bank balance went up this year. So why does the grocery run feel more expensive than last year? Because the number in your account and the value of that number are two different things — and inflation is the gap between them. Between 2020 and 2025, the U.S. Consumer Price Index (CPI-U, annual averages published by the Bureau of Labor Statistics) rose from 258.8 to 322.0. In plain terms, $100 of 2020 spending cost about $124 in 2025. Your $100 still says $100 on the screen, but it buys what about $80 bought in 2020.
That is what "inflation eats your savings" actually means. Nobody took money out of your account. Prices moved, and your money did not move with them. This guide shows the math — with real BLS numbers — and the four moves that stop the quiet erosion.
First, the real numbers: 2020 to 2025
Inflation is measured as the change in the Consumer Price Index, the BLS basket of goods and services urban consumers actually buy. Here is the annual-average CPI-U inflation rate for each recent year, from BLS data:
| Year | Annual inflation | What happened |
|---|---|---|
| 2020 | 1.2% | Quiet year; pandemic suppressed demand |
| 2021 | 4.7% | Reopening demand met broken supply chains |
| 2022 | 8.0% | The peak — energy and food surged |
| 2023 | 4.1% | Cooling, but still double the target |
| 2024 | 3.0% | Near normal, above target |
| 2025 | 2.6% | Closest to normal in five years |
Add those years together and prices rose about 24.4% in total from the 2020 average to the 2025 average. The Federal Reserve targets 2% annual inflation, so even a "normal" year shaves 2% off idle cash. The damage was not one bad year — it was five years compounding, with 2022 doing the most harm. A dollar that sat still from 2020 to 2025 lost roughly a fifth of its buying power.
Your own inflation rate is probably different from the national number — the BLS says so itself. If you rent in a hot city, drive a lot, or pay for childcare, your personal basket may have risen faster than 24%. If you own your home outright and cook at home, it may have risen slower. The national figure is the benchmark, not your bill.
The worked example: $10,000 left alone for five years
Take $10,000 left in a regular savings account paying 0.5% a year — a typical rate for a big-bank savings account — from 2020 to 2025. The balance grows slowly: $10,000 × 1.0055 = $10,252.51. You earned $252.51 in interest over five years.
But prices over the same stretch rose about 24.4%. To buy in 2025 what $10,000 bought in 2020, you would need about $12,442. Your $10,252.51 buys only $10,252.51 ÷ 1.244 = $8,240 of 2020 goods. You did not lose dollars — you lost about $1,759 of purchasing power, roughly 18% of what your money could do. The account statement says you are $252 richer. In real terms, you are about $1,759 poorer.
This is the formula that matters: real return ≈ nominal return − inflation. At 0.5% interest and 3% inflation, your real return is about −2.5% a year. Your money shrinks by two and a half cents on every dollar, every year, while the balance on the screen goes up.
What different returns actually do
The same $10,000 over ten years at 3% inflation shows how much the return rate matters. These are illustrative assumptions, not forecasts — inflation and returns both vary year to year:
| Where it sits | Assumed return | Real return | Value in today's buying power |
|---|---|---|---|
| Regular savings | 0.5% | −2.5% / year | About $7,800 |
| High-yield savings (assumed 4%) | 4% | +1.0% / year | About $11,000 |
| Balanced investing (assumed 7%) | 7% | +4.0% / year | About $14,640 |
The table is the whole argument in three rows. Cash at a low rate loses a fifth of its power in a decade. Cash at a rate above inflation holds its ground and gains a little. Money invested for the long term — accepting market ups and downs — is the only row that grows meaningfully in real terms. The differences look small per year and enormous per decade, because compounding works on both sides: for you, when returns beat inflation, and against you, when they do not.
One more number worth knowing: at 3% inflation, prices roughly double in about 24 years. A retirement income that feels comfortable today needs to be about twice as large in 24 years just to buy the same life. Any plan that ignores that doubling is planning for a smaller life than it promises.
Where inflation bites hardest
Not all money is equally exposed. Cash is the most exposed — it earns the least and has no defence at all. An emergency fund kept in a low-rate account quietly shrinks every year, which is why the fund's target should be re-checked annually: six months of expenses in 2020 dollars is not six months of expenses in 2025 dollars.
Fixed income is next. A bond paying 3% while inflation runs at 4% loses value in real terms, and a fixed pension that never rises is worth less every single year. Long-term savers face the same problem in slow motion: retirement contributions made at 2% inflation assumptions in a 4% world arrive at retirement worth far less than planned.
Salaries usually lag too. Pay rises tend to follow inflation rather than lead it, and in 2022 many workers' real wages fell even as their nominal pay rose. That lag is why the grocery run feels worse than the pay stub suggests: the raise arrived after the prices did.
The one place inflation quietly helps is a fixed-rate mortgage: you repay the loan with future dollars that are worth less, while your wages (hopefully) rise. That does not make debt good — it makes fixed-rate, long-term debt less punishing than it looks on paper.
Four moves that protect your money
1. Move idle cash to a high-yield savings account. The gap between a 0.5% account and a high-yield account is the difference between the first two rows of the table above. Keep your emergency fund and short-term savings there — it is still FDIC-insured cash, still reachable in a day or two, but it earns a rate that at least competes with inflation instead of surrendering to it. Our guide to high-yield savings accounts in 2026 explains what to look for.
2. Invest money you will not need for years. Retirement savings and other long-horizon money belong in diversified investments, not in a savings account. Over decades, broad stock-market returns have historically outpaced inflation by several percentage points a year — but with real down years along the way, so this is only for money you can leave alone. Use the compound interest calculator to see what the gap between a 1% and a 7% return does to the same monthly contribution over twenty years.
3. Consider inflation-protected options for part of your savings. U.S. Series I savings bonds and Treasury Inflation-Protected Securities (TIPS) are designed to track inflation — their returns adjust when prices rise. They are not a replacement for an emergency fund or for long-term investing, and their rates reset over time, but for money you want to keep safe in real terms they are the only instruments built for exactly that job. Read the terms before buying; they have holding periods and purchase limits.
4. Re-size your targets every year. Your emergency fund, your retirement number, and your savings goals are all stated in today's dollars, and today's dollars keep changing. Once a year, recompute one month of essential expenses and multiply by your target months — if your essentials rose from $3,200 to $3,800 a month, your six-month fund rose from $19,200 to $22,800, and that gap needs a plan. The same review applies to your retirement contributions: a fixed monthly amount buys less protection every year it stays fixed.
See what inflation does to your own numbers
Enter any amount, any rate, and any number of years — our inflation calculator shows what your money will be worth in today's buying power.
Open the Inflation Calculator →Bottom line
Inflation does not steal your money; it shrinks what your money can do, quietly, every year. From 2020 to 2025 that shrinkage was about 24% — the largest five-year erosion in decades. The defence is not a trick: keep short-term cash in an account that pays a competitive rate, invest long-term money so it can outgrow prices, use inflation-protected options for the portion you want to keep safe in real terms, and re-size your targets every year. Do those four things and inflation becomes a headwind you plan for, not a tax you never notice until the grocery bill arrives.