How the Salary Inflation Calculator works
This tool answers a simple but easy-to-misjudge question: is a salary keeping up with the cost of living? It applies the standard compound-growth formula used to adjust any dollar figure for inflation, then compares the inflation-adjusted benchmark against an actual current salary to see whether purchasing power rose or fell.
The formula
For a starting salary PV, an average annual inflation rate i, and n years elapsed, the inflation-adjusted salary is:
FV = PV × (1 + i)n
This is the same compound-growth formula used for compound interest, applied to prices instead of savings. FV is the salary that would be needed today to buy exactly what the starting salary could buy n years ago. Total inflation over the period is (1 + i)n − 1, expressed as a percentage.
Nominal raise versus real raise
A nominal raise is the plain percentage change between the old and new salary: (new ÷ old − 1) × 100. It ignores prices entirely. A real raise divides that same comparison by cumulative inflation, (new ÷ old) ÷ (1 + i)n − 1, so it measures the change in actual purchasing power rather than the change in the number printed on a paycheck.
Worked example
Take a $60,000 starting salary, 5 years elapsed, and 3.5% average annual inflation. The inflation-adjusted salary is 60,000 × 1.0355 ≈ $71,261, meaning prices rose about 18.8% over the period. If the current salary is $66,000, the nominal raise is 10% — but dividing by 18.8% cumulative inflation gives a real raise of about −7.4%. The paycheck grew, but it buys noticeably less than the original salary did.
Why a raise can still be a pay cut
- Inflation compounds: even a modest annual rate adds up — 3.5% a year is roughly 41% cumulative over 10 years, not 35%.
- Nominal numbers feel bigger: a raise is announced in dollars, but its value is measured in what those dollars can buy at today's prices.
- The break-even raise: to exactly keep pace with inflation, a raise must equal the total inflation percentage for the period — anything less is a real-terms pay cut, even though the paycheck is larger.
Assumptions and limits
The calculator compounds a single constant annual inflation rate rather than pulling year-by-year CPI index values, so it is an approximation useful for planning and comparison, not an official CPI adjustment. For a precise historical figure, use the actual CPI index values for the specific start and end months from a government statistics source.