US March CPI jumped sharply on oil prices, with the inflation peak likely in the coming months

Overview

This report reviews US March 2026 CPI data. UBS believes the notable increase in headline inflation was mainly driven by rising crude oil and gasoline prices, while core inflation came in below expectations partly because of weak non-rent services prices. The report also emphasizes that April CPI may remain strong because gasoline prices are still rising and the housing rent statistical distortion caused by the government shutdown will reverse.

Core views

The core view is as follows: first, headline CPI rose 0.87% month over month in March, and the 12-month inflation rate climbed to 3.26%, though there remains about a 0.09 percentage point downward bias because the BLS could not collect rents during the October government shutdown; second, energy commodity prices rose 21%, which was the main source of the inflation jump, but wholesale natural gas prices did not rise similarly, which may limit the pass-through of the shock into electricity, food, and core prices; third, core CPI rose only 0.20% month over month, below expectations, but 12-month core inflation increased to 2.60%, and UBS believes the prior 2.46% reading may have been the low for the year; fourth, tariffs are still gradually passing through to core goods prices, with the impact close to its maximum but potentially lasting until 2028; fifth, inflation may peak in the coming months and then decline very slowly as tariff and oil shocks fade.

Analysis framework

The report mainly uses CPI component decomposition and forecast error analysis, comparing month-over-month and 12-month changes in headline CPI, core CPI, energy, food, housing rents, core goods, transportation goods, and core non-rent services. It also benchmarks UBS Economics' forecasts, the UBS Evidence Lab Nowcast, and Bloomberg consensus estimates. Based on CPI data, the report further estimates March PCE price changes and notes that the estimate still needs to be validated by PPI and import price data.

Methodology notes

• Inflation component analysisCPI component contribution breakdown

  Break headline CPI and core CPI into components such as energy commodities, energy services, food, housing rents, core goods, transportation goods, and core non-rent services.

  By observing month-over-month and 12-month changes in each component, the report identifies gasoline and other energy commodities as the main drivers of the March inflation jump, while the downside surprise in core inflation was mainly due to weak non-rent services prices.

• Forecast validationForecast vs consensus comparison

  Compare actual CPI data with UBS Economics forecasts, the UBS Evidence Lab Nowcast, and Bloomberg consensus estimates.

  March headline CPI was only slightly below the UBS forecast, but core CPI was clearly below both UBS and market consensus expectations, indicating that inflation pressure was concentrated in energy rather than broad core categories.

• Cross-metric mappingCPI to PCE price mapping

  Use released CPI data to estimate the month's core PCE and headline PCE price changes.

  UBS estimates March core PCE rose 0.31% month over month and headline PCE rose 0.68%, but emphasizes that the estimate does not yet include March PPI and import prices and may be adjusted meaningfully later.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Crude oil and gasoline

  Main inflation driver

  Strengths

  Price increases directly lift energy commodities and headline CPI, with a strong impact on near-term inflation readings.

  Weaknesses

  If oil prices retreat or the futures curve's implied path is realized, the inflation impulse may gradually fade.

  Comparison

  Gasoline and other energy commodities rose 21% in March, far stronger than energy services, food, and most core components.

  Risks

  If crude oil remains above the level implied by the current futures curve, the inflation peak could come later and be higher.

• US interest rates and monetary policy expectations

  Affected by the inflation path

  Strengths

  Stronger CPI and PCE estimates may reinforce market concerns about rates staying higher for longer.

  Weaknesses

  Core CPI came in below expectations and non-rent services were weak, showing that inflation pressure is not broadly pervasive.

  Comparison

  Headline CPI was driven up much more by energy than core CPI, while estimated core PCE still exceeds core CPI.

  Risks

  If later PPI, import price, and PCE releases are stronger than current estimates, policy tightening expectations could rise further.

• Housing rents

  Key core inflation component

  Strengths

  OER and tenant rents rebounded in March, and April may also see an upward impact from the statistical reversal.

  Weaknesses

  Weak new-tenant rents suggest that OER growth is expected to continue slowing over the long term.

  Comparison

  Housing rents may see a technical rebound in the short term, but the trend is still weaker than the energy price shock.

  Risks

  The April reversal of rent bias could make core CPI temporarily stronger than the underlying trend.

• Core goods and autos

  Transmission channel for tariffs and wholesale prices

  Strengths

  Core goods excluding transportation rose 2.3% year over year, showing that tariffs are still passing through.

  Weaknesses

  New vehicle prices rose only 0.10%, while used vehicle prices fell 0.42%, indicating that auto prices have only limited sensitivity to tariffs so far.

  Comparison

  Tariff effects on core goods are becoming visible gradually, but remain far weaker than the short-term shock from energy commodities.

  Risks

  Rising wholesale used car prices may push used car CPI noticeably higher over the next few months.

Key data

• March headline CPI m/m+0.87%Seasonally adjusted, only 0.01 percentage point below UBS Economics' forecast and 0.09 percentage point below Bloomberg consensus.
• March 12-month headline CPI inflation3.26%Up sharply from 2.41% in February; there is still an estimated 0.09 percentage point downward bias.
• March gasoline and other energy commodity prices+21%Seasonally adjusted increase, the largest increase in nearly 70 years for the series.
• March core CPI m/m+0.20%Below UBS Economics' 0.27% forecast, the UBS Evidence Lab Nowcast of 0.24%, and Bloomberg consensus of 0.28%.
• March 12-month core CPI inflation2.60%Up from 2.46% in the previous month; UBS believes 2.46% may have been the low for this year.
• Core goods excluding transportation+0.20%Rose month over month in March; the 12-month change rose to 2.3%, significantly above -0.19% a year ago.
• Owners' equivalent rent+0.28%Rose in March; tenant rent rose 0.19%, and long-term rent growth is still expected to continue slowing.
• Core non-rent services+0.18%Below UBS expectations and the main source of the downside surprise in core CPI.
• UBS estimate of March core PCE m/m+0.31%Calculated from the day's CPI data and still awaiting PPI and import price data.
• UBS forecast for April headline CPI m/m+0.66%Expected to be driven by another strong rise in gasoline prices and a reversal of the housing rent statistical distortion.
• UBS forecast for April core CPI m/m+0.44%Expected to be affected by the reversal in housing rent bias and upward moves in some price components.

Impact & implications

For macro and market implications, the report points to still-elevated near-term upside risk to inflation, especially as energy prices and the one-off statistical correction in housing rents may push CPI readings higher over the next one to two months. This could slow the path of inflation improvement that the Federal Reserve is watching, especially if core PCE remains above the CPI-equivalent measure. However, UBS believes that if oil prices and tariff shocks gradually fade, inflation may still decline slowly over the coming years after the peak.

Risks

• If crude oil stays above the level implied by the current oil futures curve, the inflation peak could be later and higher.
• April CPI may be supported by both another rise in gasoline prices and the reversal of the housing rent statistical bias, making near-term inflation readings materially stronger.
• The PCE price estimate does not yet include March PPI and import prices, so later revisions could significantly change the assessment of the Federal Reserve's key inflation gauge.
• Although the upward pass-through of tariffs to core goods prices is close to its maximum, the report expects it may still persist until 2028.
• If vehicle prices rise later on the back of higher wholesale used car prices, core CPI could face additional pressure in the future.

What to watch

• The release date for April CPI, which the report says is scheduled for May 12.
• Whether April gasoline and energy commodity prices continue to rise sharply.
• Whether housing rents in April reverse the downward bias caused by the October government shutdown as expected.
• March PPI and import price data, because they may materially change the CPI-to-PCE estimate.
• The official March PCE price release, especially whether core PCE remains above 3%.
• The degree to which oil prices deviate from the current oil futures curve.
• Auto prices, especially the pass-through from wholesale used car prices into used car CPI.