The Inflation Reality
Why a dollar today buys less tomorrow
Inflation is a sustained rise in the general price level of goods and services — which means every unit of currency buys a little less over time. It isn't a glitch; in most modern economies it's a deliberate policy target (commonly around 2% per year), because central banks believe mild, predictable inflation encourages spending and investment over hoarding cash.
The silent tax on savings
If your savings sit in cash earning 0% while prices rise 5% a year, your real (inflation-adjusted) wealth shrinks even though the number in your account stays the same. This is why "saving" and "investing" are different goals: saving preserves nominal amount, investing aims to beat the inflation rate.
- Nominal value: the number printed on the note or statement — never falls on its own.
- Real value: what that number can actually buy — falls whenever inflation is positive.
- Purchasing power: another name for real value, usually tracked against a basket of goods (a Consumer Price Index).
Pro Tip
Compare prices, not just currency amounts, across time. "My rent is only 20% higher than 5 years ago" sounds fine until you check whether average wages or the CPI rose by more or less than that.
Key Formula / Concept — Real Return
Real Return ≈ Nominal Return − Inflation Rate
A savings account paying 3% interest during 6% inflation is still losing you about 3% in real purchasing power per year.
Year 0
$100 buys a full basket of goods
Year 10
$100 buys ~82% of that basket (at 2%/yr)
Year 25
$100 buys ~60% of that basket
Year 40
$100 buys ~45% of that basket
Try it — see exactly how much a past amount has eroded in real purchasing power.
Inflation & Purchasing Power Calculator
Compounds a historical rate forward to 2026
Real Value Today
$55.37
of your original $100
Erosion
-44.6%
lost to inflation over 20 yrs
Equivalent Today
$180.61
needed now for the same buying power
Assumes a constant annual rate compounded yearly — real-world inflation varies year to year.
Try it — project a monthly-contribution investment plan forward and see if it outpaces inflation.
Compound Interest / Wealth Growth Calculator
Monthly compounding, contribution added each month
Final Balance
$72,515
Total Contributed
$37,000
Total Growth
$35,515
| Year | Contributed | Growth | Balance |
|---|---|---|---|
| 1 | $3,400 | $173 | $3,573 |
| 2 | $5,800 | $560 | $6,360 |
| 3 | $8,200 | $1,177 | $9,377 |
| 4 | $10,600 | $2,046 | $12,646 |
| 5 | $13,000 | $3,185 | $16,185 |
| 6 | $15,400 | $4,619 | $20,019 |
| 7 | $17,800 | $6,370 | $24,170 |
| 8 | $20,200 | $8,466 | $28,666 |
| 9 | $22,600 | $10,935 | $33,535 |
| 10 | $25,000 | $13,809 | $38,809 |
| 11 | $27,400 | $17,120 | $44,520 |
| 12 | $29,800 | $20,905 | $50,705 |
| 13 | $32,200 | $25,204 | $57,404 |
| 14 | $34,600 | $30,058 | $64,658 |
| 15 | $37,000 | $35,515 | $72,515 |
Assumes a constant monthly-compounded return — real markets fluctuate year to year. For informational purposes only, not financial advice.
Checkpoint Quiz
Checkpoint Quiz
Question 1 of 5What does "inflation" fundamentally mean?