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A Kiplinger analysis of seasonally adjusted CPI data from 1948 onward ranks Jimmy Carter’s term highest for average inflation, at 9.75%, and John F. Kennedy’s lowest, at 1.15%. The figures describe inflation during each president’s time in office, not how much that president caused it; the Federal Reserve and global events also affect prices.
Jimmy Carter’s 1977–1981 term had the highest average inflation in a Kiplinger comparison of U.S. presidents, at 9.75%, while John F. Kennedy’s 1961–1963 term had the lowest, at 1.15%. The ranking averages monthly year-over-year growth in the seasonally adjusted Consumer Price Index, measuring the inflation experienced during each term rather than proving what any president caused.
Kiplinger calculated the averages from the Consumer Price Index for All Urban Consumers (CPI-U), the widely used headline measure of consumer inflation. It used seasonally adjusted figures and averaged each month’s year-over-year CPI growth across the months a president was in office. The data source was the Federal Reserve Bank of St. Louis; the available year-over-year series begins in 1948.
After Carter, the highest listed averages were Gerald Ford at 8.13% and Richard Nixon at 5.66%. Joe Biden’s 2021–2025 term averaged 4.90%, while the report gives a historical average of 3.52% for 1948 onward. Among other recent administrations, Ronald Reagan averaged 4.66%, George H.W. Bush 4.35%, Bill Clinton 2.61%, Barack Obama 1.39%, and Donald Trump’s first term 1.90%.
The report lists Trump’s second term, which began in 2025, at 2.98% as of October 24, 2026. Because that term was still underway at the stated cutoff, the figure is a partial-term average and may change as more monthly data becomes available. The rankings are descriptive: they show the CPI pattern during each administration, not a measure of presidential responsibility.
Why the inflation ranking matters
Inflation affects household budgets through the prices of essentials and services, including housing, fuel, food, vehicles and insurance. A historical comparison can help readers see how the pace of price increases varied across administrations and why inflation figures can become part of political debate. Kiplinger notes that cost concerns have featured in recent elections and polling, making the subject relevant beyond economic data.
But the ranking should not be read as a presidential scorecard for policy success or failure. A president’s term is a convenient time frame, not a controlled test of cause and effect. The data can describe what consumers faced while a president was in office; it cannot, by itself, separate the effects of federal policy from central-bank decisions, global disruptions or other forces.
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How the CPI comparison was built
The report’s measure is the average year-over-year CPI growth for every month of a president’s term, including partial months. Seasonal adjustment removes recurring influences such as holidays, weather-related patterns and sales. Since the year-over-year series begins in 1948, the comparison cannot cover earlier administrations on the same basis. Harry Truman’s entry starts in 1948 even though his presidency began in 1945.
Kiplinger says presidents can influence economic conditions, but inflation also reflects factors outside the White House. The Federal Reserve sets monetary policy independently, while events such as the post-pandemic recovery, supply-chain bottlenecks and Russia’s invasion of Ukraine affected prices in recent years. Policy effects can also arrive with delays, extending beyond the president who enacted a measure.
“Much like presidential policy can contribute to the direction of the stock market, presidents have some effect on U.S. inflation — but they’re hardly the only determinant.”
— Kiplinger
What term averages cannot show
The ranking does not estimate how much of each inflation rate resulted from a president’s policies, nor does it compare policy choices under otherwise identical conditions. It also does not isolate the timing of decisions or outside shocks. The 2.98% figure for Trump’s second term is current only through the report’s October 24, 2026 cutoff and covers an incomplete term; the source does not provide a final value.
The supplied report excerpt begins its Biden discussion but ends before giving the full account of subsequent inflation and policy developments. The ranking itself is provided, but further explanations or causal estimates should not be inferred from the available figures.
How future CPI readings may change the list
The next change to the ongoing comparison would come as additional monthly CPI data is released and the average for Trump’s second term is recalculated. For every administration, readers can check future versions of the ranking against the same questions: what period is covered, which inflation measure is used and whether the figure is a full-term or partial-term average.
To assess responsibility, the table alone is not enough. That would require separate evidence about policy timing and effects, Federal Reserve actions and external economic shocks. Until such analysis is supplied, the figures are best understood as historical inflation rates during presidential terms, not a causal ranking of presidents.
Key Questions
Which president had the highest average inflation in the ranking?
Jimmy Carter, whose 1977–1981 term averaged 9.75% year-over-year CPI growth under Kiplinger’s method.
Which president had the lowest average inflation?
John F. Kennedy ranked lowest, with an average of 1.15% during his 1961–1963 term.
Does the ranking show which presidents caused inflation?
No. It records average CPI growth during each president’s time in office. The report says inflation is also shaped by the Federal Reserve, global events and other factors, and that policy effects can take time to appear.
How did Kiplinger calculate the averages?
Kiplinger averaged monthly, year-over-year growth in the seasonally adjusted CPI-U across each president’s months in office, including partial months. The cited series comes from the Federal Reserve Bank of St. Louis and begins in 1948 for year-over-year comparisons.
Is the listed figure for Trump’s second term final?
No. The report gives an average of 2.98% as of October 24, 2026, while the term was ongoing. That partial-term figure can change as additional CPI data is included.
Source: rss
