See exactly how inflation erodes your purchasing power over time. Enter any dollar amount and time period to understand the real impact of rising prices on your wealth.
How Inflation Destroys Purchasing Power
Inflation is the silent tax on your savings. When prices rise 3% annually, your dollars buy 3% less each year. Over a decade, $100,000 in a non-interest-bearing account loses roughly $26,000 in purchasing power. Over 30 years, it loses more than half its value. This calculator quantifies that erosion so you can plan accordingly.
The Federal Reserve targets 2% annual inflation, but actual inflation varies significantly. The U.S. experienced 8-9% inflation in 2022, reminding investors that purchasing power risk is not theoretical. Even at the 3% long-term historical average, prices double approximately every 24 years.
How to Use This Calculator
Current Amount – The dollar amount you want to evaluate. This could be your savings balance, the current cost of goods, or your annual income.
Annual Inflation Rate – The expected average annual inflation rate. The U.S. long-term average is approximately 3%. Recent rates have run higher at 3-4%. Use 2-3% for conservative planning or 4-5% for a more cautious projection.
Time Period – How far into the future you want to project. For retirement planning, this might be 20-40 years. For near-term goals, 5-10 years.
Understanding the Results
Future Purchasing Power shows what your current dollars will actually be worth in the future, measured in today dollars. If $100,000 has future purchasing power of $74,000, it means your $100,000 will only buy what $74,000 buys today.
Purchasing Power Lost is the dollar amount of value that inflation erodes from your savings.
Cost of Same Goods in Future shows the flip side. If something costs $100,000 today, this number tells you what the same basket of goods will cost in the future at the given inflation rate.
Why This Matters for Your Investments
Any investment return below the inflation rate is actually losing money in real terms. A savings account paying 1% while inflation runs at 3% delivers a negative 2% real return. Your balance grows nominally but buys less each year.
This is why financial advisors emphasize growth investments for long-term goals. Stocks have historically returned about 10% annually, delivering roughly 7% in real (inflation-adjusted) returns. Bonds typically return 4-6%, offering 1-3% real returns. Cash savings at current high-yield rates of 4-5% roughly match inflation, preserving but not growing purchasing power.
Inflation and Retirement Planning
Retirees face unique inflation risk because they rely on fixed savings rather than growing income. A retiree spending $60,000 per year needs $80,635 per year in 10 years at 3% inflation to maintain the same standard of living. Over a 30-year retirement, that same $60,000 annual need grows to $145,636.
This is why the traditional 4% withdrawal rule builds in annual inflation adjustments and why financial planners recommend maintaining some equity allocation even in retirement portfolios.