Inflation Calculator: What $100 Today Will Be Worth in 10 Years

Inflation is the silent tax that affects everyone, whether you realize it or not. That $100 bill in your wallet buys less every single year. In 2006, $100 could fill your gas tank twice, buy a week of groceries for one person, and still have change. In 2026, that same $100 barely covers one of those things. Understanding inflation is not just academic — it directly impacts your savings strategy, investment decisions, and retirement planning.

What Is Inflation, Exactly?

Inflation is the rate at which the general level of prices for goods and services rises over time, reducing the purchasing power of money. When inflation is 3%, something that costs $100 today will cost $103 next year. This might seem small, but it compounds year after year, just like interest — except it works against you. The Consumer Price Index (CPI) is the most common measure of inflation, tracking the price changes of a basket of everyday goods including food, housing, transportation, healthcare, and entertainment.

What $100 Today Will Be Worth

Using a 3% average annual inflation rate — roughly the historical U.S. average — here is what $100 in today's purchasing power becomes: in 5 years, about $86; in 10 years, about $74; in 20 years, about $55; in 30 years, about $41. In other words, $100 tucked under your mattress today will only buy $41 worth of goods in 30 years. You haven't lost any dollars, but you have lost more than half of your purchasing power. Experiment with different inflation rates using our Inflation Calculator at money.now.to.

Historical Inflation: Not Always 3%

While 3% is a reasonable long-term average, inflation has varied dramatically over the decades. In the 1970s and early 1980s, inflation soared above 10% — prices nearly doubled in a decade. From 2000 to 2020, inflation averaged only about 2.1%, lulling people into complacency. Then 2021-2023 saw inflation spike to 5-9%, reminding everyone how quickly prices can rise. Future inflation is unpredictable, which is why building inflation protection into your financial plan is essential.

How Inflation Affects Your Savings Account

Most savings accounts in 2026 offer interest rates of 4-5% APY for high-yield accounts, but traditional savings accounts still pay 0.01-0.5%. If inflation is running at 3% and your savings account earns 0.1%, you are losing 2.9% in real purchasing power every year. Even a high-yield account earning 4.5% only generates a 1.5% real return after 3% inflation. This is why financial advisors insist that long-term savings belong in investments, not savings accounts. Cash is for short-term needs and emergencies, not long-term wealth building.

Inflation and Your Salary

If you receive a 3% raise in a year with 3% inflation, your purchasing power has not changed — you are running in place. Only raises above the inflation rate represent real increases in your standard of living. This is why negotiating regular raises matters. Over a 30-year career, the difference between getting inflation-matching raises (3%) and slightly-above-inflation raises (5%) is staggering. A $50,000 salary with 3% annual raises becomes $121,000 in 30 years. With 5% raises, it becomes $216,000. Use our Salary & Tax Calculator at money.now.to to model how raises affect your take-home pay over time.

Inflation and Retirement Planning

Inflation is the retirement planner's greatest enemy. If you retire at 65 and live to 95, your expenses will face 30 years of inflation. At 3% inflation, a $50,000 annual budget becomes $121,000 in 30 years. Your retirement portfolio needs to not just generate income, but generate increasing income over time. This is why financial advisors recommend keeping a significant portion of retirement portfolios in stocks, even during retirement — stocks have historically outpaced inflation over long periods, while bonds and cash often have not.

How to Protect Yourself from Inflation

Several strategies help protect and grow your purchasing power. Invest in stocks: the S&P 500 has averaged about 10% annual returns, far outpacing inflation. Invest in real estate: property values and rental income generally keep pace with or exceed inflation. Consider Treasury Inflation-Protected Securities (TIPS): these government bonds adjust their principal based on inflation, guaranteeing a real return. Invest in yourself: your earning power is your greatest asset, and skills that command higher pay are the best inflation hedge of all.

The Inflation of Specific Categories

Overall inflation averages mask dramatic differences between categories. Since 2000, college tuition has inflated at roughly 5-6% per year. Healthcare costs have risen about 4-5% annually. Housing in major cities has increased 6-8% per year. Meanwhile, technology has experienced deflation — the computing power in your phone would have cost millions of dollars 30 years ago. When planning for specific future expenses (like college for your children or healthcare in retirement), use category-specific inflation rates, not the overall CPI average.

Deflation: The Opposite Problem

While inflation gets most of the attention, deflation — falling prices — is actually more dangerous to an economy. Deflation discourages spending (why buy today if it will be cheaper tomorrow?), increases the real burden of debt, and can trigger a downward economic spiral. Central banks actively work to prevent deflation, which is one reason they target a positive inflation rate of about 2% rather than 0%. A moderate level of inflation is considered healthy for an economy.

The Bottom Line

Inflation is unavoidable, but its impact on your finances is manageable with the right strategy. Keep only short-term money in savings accounts. Invest long-term savings in assets that outpace inflation. Negotiate raises that exceed inflation. Plan for retirement using inflation-adjusted numbers, not today's dollars. And check the real impact on your specific situation with our Inflation Calculator at money.now.to. The worst financial mistake you can make is doing nothing — because inflation guarantees that doing nothing means losing money every single year.