The real value of minimum wages has fluctuated over time: The inflation-adjusted value of the federal minimum wage each time it has been increased

Year Effective  Minimum Wage (nominal)  Inflation-Adjusted Value of Minimum Wage (2023$) 
1938  $0.25  $4.74 
1939  $0.30  $5.69 
1945  $0.40  $5.84 
1950  $0.75  $8.47 
1956  $1.00  $9.88 
1961  $1.15  $10.19 
1963  $1.25  $10.81 
1967  $1.40  $11.27 
1968  $1.60  $12.50 
1974  $2.00  $11.30 
1975  $2.10  $11.13 
1976  $2.30  $11.45 
1978  $2.65  $11.79 
1979  $2.90  $11.94 
1980  $3.10  $11.49 
1981  $3.35  $11.23 
1990  $3.80  $8.74 
1991  $4.25  $9.38 
1996  $4.75  $9.15 
1997  $5.15  $9.75 
2007  $5.85  $8.62 
2008  $6.55  $9.15 
2009  $7.25  $10.33 

Source: All values in July 2023 dollars, adjusted using the CPI-U in 2023 chained to the CPI-U-RS (1978–2022) and CPI-U-X1 (1967–1977) and CPI-U (1966 and before). Calculations by Ben Zipperer, Economic Policy Institute.

View the underlying data on epi.org.