How inflation erodes purchasing power: a 10-year analysis
Inflation is often described as a silent tax. You do not feel it day to day, but over years it dramatically reduces what your money can buy. A dollar in 2015 is worth about 78 cents today. That 22% loss of purchasing power happened quietly.
The 2015–2025 inflation story
The last decade saw two distinct phases. From 2015 to early 2020, inflation ran at roughly 2% per year — the Federal Reserve’s target. Then came the pandemic. Supply chain disruptions, stimulus spending, and pent-up demand pushed inflation to 9.1% in June 2022, the highest in 40 years. While it has cooled since, prices have not come down. They simply stopped rising as fast.
What $100 could buy in 2015 would cost about $128 today. Your dollar goes 22% less far.
What this means for your savings
Money in a checking account earning 0% interest loses purchasing power every year. At 3% inflation, $10,000 in cash loses $300 of purchasing power annually. Over 10 years, that same $10,000 would be worth only $7,440 in today’s dollars.
This is why investing is not optional. Your money must grow at least at the rate of inflation just to break even. Historically, the stock market has returned 7-10% annually, well above inflation. Bonds return 3-5%. Cash loses.
Real-world examples
A dozen eggs that cost $2.50 in 2015 costs about $4.50 today. A gallon of gas went from $2.50 to $3.50. A movie ticket from $9 to $13. These small differences compound into significant changes in your cost of living.
The house you could have bought for $300,000 in 2015 would cost roughly $400,000 today. That extra $100,000 in price is partly real appreciation and partly inflation.
The one number that matters
Your real return is your nominal return minus inflation. A 7% investment return with 3% inflation is a 4% real return. Use the Inflation Calculator to see how much any dollar amount from the past is worth today.
Why your raise might be a pay cut
If you got a 3% raise in 2023 but inflation was 5%, your purchasing power actually dropped by 2%. This is called real wage decline and it has affected most workers since the pandemic. Your nominal salary went up, but what that salary can buy went down. The only number that matters is your real income: nominal income minus inflation.
This is especially important for freelancers setting multi-year contracts. A three-year agreement at $100/hour with no escalation clause means your real rate drops roughly 9% over the contract at 3% inflation. Include an annual inflation adjustment in your contracts: “Rates will increase annually by the CPI-U percentage change from the prior year, with a minimum increase of 3%.”
What $50,000 in 2015 is worth today
A $50,000 salary in 2015 has the same purchasing power as roughly $64,000 today. If your income has not kept pace with that growth, you have experienced a real wage decline even if your nominal income stayed flat or grew modestly. The same applies to savings, retirement goals, and business pricing.
This is why financial planning must assume 2-3% long-term inflation. Retirement calculators that do not account for inflation are dangerously misleading. A $1 million nest egg sounds like a lot, but at 3% inflation over 30 years, its purchasing power drops to roughly $412,000 in today’s dollars. Your savings need to grow at least at the inflation rate just to maintain their real value.
Frequently asked questions
What is inflation and how does it work?
Inflation is the gradual increase in prices of goods and services over time, which reduces the purchasing power of money. When the money supply grows faster than the production of goods, each dollar buys less than it used to. A $100 grocery trip in 2020 would cost roughly $120 today due to cumulative inflation.
How does inflation affect my savings?
If your savings earn less interest than the inflation rate, you are effectively losing purchasing power. Money earning 1% in a regular savings account while inflation runs at 3% loses 2% of its purchasing power each year. $10,000 in such an account would be worth only about $8,200 in real terms after 10 years.
What is the average inflation rate?
The average annual inflation rate in the US has been approximately 3.2% over the past century. In recent years (2021-2024), inflation spiked as high as 9.1% in June 2022 before settling back toward 3%. The Federal Reserve targets a 2% long-term inflation rate as ideal for economic stability.
How do I calculate purchasing power loss?
To calculate purchasing power loss, use the formula: Future Value = Present Value / (1 + Inflation Rate)^Years. $1,000 today at 3% inflation will be worth $744 in 10 years, meaning you lose about $256 in purchasing power. The Inflation Calculator does this calculation automatically.
What investments protect against inflation?
Assets that historically protect against inflation include stocks (S&P 500 has outpaced inflation by about 7% annually), Treasury Inflation-Protected Securities (TIPS), real estate, and commodities like gold. Cash and fixed-rate bonds are the most vulnerable to inflation erosion.