Here are the changes in the seasonally adjusted CPI for the six months ending in Dec:
Aug 0.3483%
Sept. 0.2951% (There was no report for October due to the government shutdown)
Nov. 0.2523% (change from Sept)
Dec. 0.2978%
Jan. 0.1708%
Feb. 0.2670
The last decline was March 2025 when it was -0.0500%. Before that it was June 2024 when it was -0.0029%.
See Consumer Price Index for All Urban Consumers: All Items in U.S. City Average
from FRED (Federal Reserve Economic Data) compiled by the Research
Division at the Federal Reserve Bank of St. Louis for data on the
seasonally adjusted CPI.
That site shows a graph but if you click on the Download button you will get the actual numbers in Microsoft Excel.
The
Consumer Price Index for All Urban Consumers: All Items in U.S. City
Average (CPIAUCSL) was 327.460 in Feb. and 330.293 in March.
Since 330.293/327.460 = 1.00865, that
means it was up 0.865%. If we had
that every month for 12 months it would be up 10.89%.
It was 319.785 in March 2025. Since 330.293/319.785 = 1.0329, that means it was up 3.29% over the last 12 months.
The
non-seasonally adjusted CPI was 330.213 in March and 319.799 in March 2025. That was up 3.26%. So pretty close to the seasonally
adjusted CPI. This is still above the Fed's target of 2.0% (although
they prefer to use the Personal Consumption Expenditures Price Index
which was 2.8% higher in Feb. 2026 than Feb. 2025).
For more information see
Consumer prices rose 3.3% in March, as energy prices spiked due to Iran conflict by Jeff Cox of CNBC. Excerpt:
"The
consumer price index
increased a seasonally adjusted 0.9% for the month, putting the annual
inflation rate at 3.3%, pushed by a 10.9% surge in energy costs. Both
numbers were in line with the Dow Jones consensus. The annual rate was
the highest since April 2024 and up from 2.4% in February.
However, excluding food and energy, core
prices rose much less – just 0.2% for the month and 2.6% from a year
ago, both 0.1 percentage point below forecast, indicating that
underlying inflation was contained. There even were even pockets of
outright price declines, as medical care, personal care, and used cars
and trucks all fell during the month.
The Iran conflict
was the story for the monthly inflation reading, as gasoline soared
21.2%, accounting for nearly three-quarters of the headline price
increase, according to the BLS.
The article also discusses what types of products are going up in price and what is going down. There is a graph of the monthly year-over-year percent change in prices and core prices going back almost 4 years."
The article also discusses what types of products are going up in price and what is going down. There is a graph of the monthly year-over-year percent change in prices and core prices going back almost 4 years.
Related material:
The table below has the annual inflation rate since 1914 in the columns labeled CPI %Ch. or CPI percentage change. It is from
Consumer Price Index Data from 1913 to 2026
and is not seasonally adjusted. It is also the December to December
change in the CPI. That site also looks at how the 12 month average for
the CPI changed from one year to the next.
|
Year
|
CPI %Ch.
|
|
Year
|
CPI %Ch.
|
|
Year
|
CPI %Ch.
|
|
Year
|
CPI %Ch.
|
|
1914
|
1
|
|
1944
|
2.3
|
|
1974
|
12.3
|
|
2004
|
3.3
|
|
1915
|
2
|
|
1945
|
2.2
|
|
1975
|
6.9
|
|
2005
|
3.4
|
|
1916
|
12.6
|
|
1946
|
18.1
|
|
1976
|
4.9
|
|
2006
|
2.5
|
|
1917
|
18.1
|
|
1947
|
8.8
|
|
1977
|
6.7
|
|
2007
|
4.1
|
|
1918
|
20.4
|
|
1948
|
3
|
|
1978
|
9
|
|
2008
|
0.1
|
|
1919
|
14.5
|
|
1949
|
-2.1
|
|
1979
|
13.3
|
|
2009
|
2.7
|
|
1920
|
2.6
|
|
1950
|
5.9
|
|
1980
|
12.5
|
|
2010
|
1.5
|
|
1921
|
-10.8
|
|
1951
|
6
|
|
1981
|
8.9
|
|
2011
|
3
|
|
1922
|
-2.3
|
|
1952
|
0.8
|
|
1982
|
3.8
|
|
2012
|
1.7
|
|
1923
|
2.4
|
|
1953
|
0.7
|
|
1983
|
3.8
|
|
2013
|
1.5
|
|
1924
|
0
|
|
1954
|
-0.7
|
|
1984
|
3.9
|
|
2014
|
0.8
|
|
1925
|
3.5
|
|
1955
|
0.4
|
|
1985
|
3.8
|
|
2015
|
0.7
|
|
1926
|
-1.1
|
|
1956
|
3
|
|
1986
|
1.1
|
|
2016
|
2.1
|
|
1927
|
-2.3
|
|
1957
|
2.9
|
|
1987
|
4.4
|
|
2017
|
2.1
|
|
1928
|
-1.2
|
|
1958
|
1.8
|
|
1988
|
4.4
|
|
2018
|
1.9
|
|
1929
|
0.6
|
|
1959
|
1.7
|
|
1989
|
4.6
|
|
2019
|
2.3
|
|
1930
|
-6.4
|
|
1960
|
1.4
|
|
1990
|
6.1
|
|
2020
|
1.4
|
|
1931
|
-9.3
|
|
1961
|
0.7
|
|
1991
|
3.1
|
|
2021
|
7
|
|
1932
|
-10.3
|
|
1962
|
1.3
|
|
1992
|
2.9
|
|
2022
|
6.5
|
|
1933
|
0.8
|
|
1963
|
1.6
|
|
1993
|
2.7
|
|
2023
|
3.4
|
|
1934
|
1.5
|
|
1964
|
1
|
|
1994
|
2.7
|
|
2024
|
2.9
|
|
1935
|
3
|
|
1965
|
1.9
|
|
1995
|
2.5
|
|
2025
|
2.7
|
|
1936
|
1.4
|
|
1966
|
3.5
|
|
1996
|
3.3
|
|
|
|
|
1937
|
2.9
|
|
1967
|
3
|
|
1997
|
1.7
|
|
|
|
|
1938
|
-2.8
|
|
1968
|
4.7
|
|
1998
|
1.6
|
|
|
|
|
1939
|
0
|
|
1969
|
6.2
|
|
1999
|
2.7
|
|
|
|
|
1940
|
0.7
|
|
1970
|
5.6
|
|
2000
|
3.4
|
|
|
|
|
1941
|
9.9
|
|
1971
|
3.3
|
|
2001
|
1.6
|
|
|
|
|
1942
|
9
|
|
1972
|
3.4
|
|
2002
|
2.4
|
|
|
|
|
1943
|
3
|
|
1973
|
8.7
|
|
2003
|
1.9
|
|
|
|
Here is a timeline graph of this data: