In 2015, the average price of a dozen eggs in the US was around $2.75. By 2023, that same dozen cost over $4.80 — a 75% increase in eight years. The eggs didn't get better. The chickens didn't change. What changed was the value of the dollar relative to the things it can buy. That's inflation in its most tangible form: money gradually losing its purchasing power over time.
Inflation isn't just a news item or a political talking point. It directly affects how much your savings are worth, whether your salary raise was actually a raise, and how much you'll need to retire comfortably. Understanding it — properly, not just vaguely — changes how you make financial decisions.
What Inflation Actually Is
Inflation is a sustained increase in the general price level of goods and services over time. When inflation is running at 3% per year, something that costs $100 today will cost $103 next year. The product hasn't changed — but you need more dollars to buy it, which means each individual dollar is worth slightly less.
The official measure in the US is the Consumer Price Index (CPI) — a basket of commonly purchased goods and services including food, housing, transport, healthcare, and clothing. When the CPI rises, inflation is rising. Central banks like the Federal Reserve monitor this closely and target around 2% annual inflation as the healthy "cruise speed" for an economy.
2%
Fed's inflation target
$163
What $100 (2010) costs now
40yr
For $100 to halve at 2% inflation
Why Does Inflation Happen?
There are three main drivers, and they often overlap:
- Demand-pull inflation: When more people want to buy things than there are things available to buy, sellers raise prices. Post-pandemic, pent-up consumer demand hitting supply-constrained markets produced exactly this — too much money chasing too few goods.
- Cost-push inflation: When the cost of producing goods rises — energy prices, raw materials, wages — companies pass those costs on through higher prices. The 2021–2023 energy price spike is a recent textbook example.
- Monetary inflation: When a central bank expands the money supply significantly (prints money), more currency chases the same number of goods. This was a contributing factor to the post-2020 inflation surge, when governments injected large stimulus packages into economies.
Some inflation is normal and healthy — it encourages spending and investment rather than hoarding cash. The problem is when inflation runs too hot (above 4–5%) for extended periods, or when wages don't keep up. Deflation — prices falling — sounds nice but is actually more economically dangerous, because it encourages people to delay purchases ("it'll be cheaper tomorrow"), which slows the entire economy.
How Inflation Erodes Your Money Over Time
This is where it gets personal. If your money is sitting in a savings account earning 1% interest while inflation is running at 3%, you're losing 2% of purchasing power every year. The number in your account goes up, but what it can actually buy goes down. This is called a negative real return.
| Scenario | After 10 Years | After 20 Years | After 30 Years |
|---|---|---|---|
| $10,000 under mattress (0%) | $7,441 real value | $5,537 real value | $4,120 real value |
| $10,000 at 1% savings (below inflation) | $8,203 real value | $6,730 real value | $5,521 real value |
| $10,000 at 3% (matches inflation) | $10,000 real value | $10,000 real value | $10,000 real value |
| $10,000 at 7% index fund (beats inflation) | $16,289 real value | $26,533 real value | $43,219 real value |
Assumes 3% inflation. The mattress scenario shows that cash stored without any return loses over half its purchasing power in 30 years. Money needs to grow faster than inflation to maintain its real value.
Inflation and Your Salary: Are You Actually Getting a Raise?
This is the question most people never ask. A 3% pay rise sounds positive. But if inflation is running at 4%, your real salary just declined by 1%. You have more dollars, but they buy less. Your nominal wage (the number) went up. Your real wage (the purchasing power) went down.
The formula is simple: Real raise = Nominal raise − Inflation rate. Any year where your pay increase doesn't outpace inflation is functionally a pay cut, regardless of what HR calls it.
Fixed incomes and inflation: Retirees on fixed pensions or annuities are particularly vulnerable. If your retirement income is fixed at $3,000/month and inflation averages 3% annually, your real income loses a third of its purchasing power in just 14 years. This is why building inflation-beating investments into retirement planning isn't optional — it's essential.
How to Protect Your Money from Inflation
- Invest in equities (stocks). Historically, the stock market has returned 7–10% annually — well above the long-run inflation average of around 3%. Index funds that track the broad market are the most accessible way to access this return.
- Use high-yield savings accounts for cash reserves. In 2026, HYSAs are offering 4–5% — which actually keeps pace with or beats inflation for money you need accessible. Standard savings accounts at 0.5% do not.
- Consider I-Bonds or TIPS. US Treasury Inflation-Protected Securities (TIPS) adjust their principal with inflation — their return is explicitly linked to CPI. I-Bonds issued by the US Treasury also carry inflation-adjusted yields. Both are low-risk options for inflation protection.
- Own real assets. Real estate, commodities, and infrastructure tend to appreciate in inflationary environments because their value is linked to physical things, not currency. A house you own becomes more valuable in nominal terms as inflation rises.
- Don't hold excessive cash long-term. Cash has no inflation hedge. An emergency fund of 3–6 months of expenses in a HYSA is sensible. Cash beyond that should be working in assets that grow faster than inflation.
See how inflation affects your savings over time
Our free savings calculator lets you model growth at different interest rates — try entering a rate below inflation to see your purchasing power erode, then a rate above it to see what genuine wealth building looks like.
Open Savings Calculator arrow_forwardGood Inflation vs Bad Inflation
Not all inflation affects people equally. There's an important distinction between asset inflation (rising prices of homes, stocks, investments) and consumer inflation (rising prices of goods and services). Asset inflation benefits those who own assets — homeowners and investors see their net worth rise. Consumer inflation hurts everyone, but hits lower-income households hardest because they spend a larger proportion of income on necessities like food, rent, and energy.
This is why inflation is politically charged. During periods of high consumer inflation, people on fixed or slowly-rising wages feel squeezed even if headline economic numbers look fine. Their nominal income stayed stable while the cost of every essential rose around them.
The best personal defence against both is the same: own assets, minimise cash drag, ensure income grows at least as fast as inflation, and build savings in vehicles that earn a real return. These aren't exotic strategies — they're the practical application of understanding what inflation actually does to money over time.