Financial education
How Inflation Reduces Purchasing Power
Inflation means the same amount of money may buy fewer goods and services over time.
How the math works
Inflation compounds the same way interest does, but in reverse for your money's buying power: dividing a future amount by (1 + inflation rate) raised to the number of years tells you what that amount is worth in today's purchasing power.
Worked example
At 3% average inflation, $50,000 today has the buying power of only about $27,684 in 20 years. Put another way, something that costs $50,000 today would cost roughly $90,306 in 20 years at that same rate.
What to watch for
- Inflation is uneven across categories — housing, food, and healthcare often run hotter than the headline rate
- Cash sitting idle loses purchasing power even though the account balance doesn't change
- A raise or return that doesn't beat inflation is a real-terms pay cut, even though the nominal number went up
Practical takeaway
When comparing a savings or investment return to a goal, subtract expected inflation first to see the real (purchasing-power) growth, not just the nominal number.