US CPI Preview: Will August Inflation Seal a September Fed Rate Hike?

Key Takeaways

• The August US Consumer Price Index will be released on Friday, September 11, at 8:30 a.m. Eastern Time.
• Economists expect headline inflation to remain at 3.4% year over year, while core inflation is forecast to ease from 2.5% to 2.4%.
• Higher gasoline and transportation costs could keep headline inflation elevated after renewed disruptions to Middle Eastern energy supplies.
• The probability of a September Federal Reserve rate hike climbed to around 60% after the US economy added 162,000 jobs in August.
• A hotter inflation report could strengthen the case for a 25 basis point increase, while softer core inflation may allow the Fed to leave rates unchanged.

The US CPI report for August 2026 could determine whether the Federal Reserve raises interest rates at its September meeting after a surprisingly strong employment report revived concerns that the economy remains too resilient for inflation to return smoothly to target.

Economists expect annual headline inflation to hold at 3.4%, while core inflation could moderate slightly to 2.4%. The gap between the two measures has become increasingly important because rising energy prices are pushing up household costs even as some underlying inflation indicators show signs of cooling.

With market expectations for a September rate hike fluctuating around 50% to 60%, even a relatively small surprise in the CPI figures could trigger a significant reaction across stocks, bonds, currencies, gold and cryptocurrencies.

When Will the August US CPI Report Be Released?

The US Bureau of Labor Statistics will publish the August CPI report on Friday, September 11, 2026, at 8:30 a.m. Eastern Time.

The report will arrive five days before the Federal Reserve announces its next interest rate decision on September 16. The Fed will also publish updated economic projections following its September 15 and 16 meeting.

The Producer Price Index will be released one day earlier, on September 10. It may provide an initial indication of whether businesses faced stronger cost pressures during August. However, CPI will carry greater weight because it measures the prices paid directly by consumers.

The official BLS September release calendar confirms the following schedule:

What Is the Forecast for August CPI?

Economists expect the August report to show that headline inflation remained at 3.4% year over year, unchanged from July. Core inflation, which excludes food and energy, is forecast to slow to 2.4% from 2.5%.

The current consensus suggests that headline and underlying inflation could move in different directions.

A stable headline rate would leave inflation well above the Federal Reserve’s 2% objective. However, a decline in core inflation would support the argument that persistent price pressures are gradually weakening beneath the energy-driven headline figure.

According to economists surveyed by Reuters, the Fed is likely to place more emphasis on the core reading because the central bank has limited ability to control an externally driven oil shock.

July CPI Showed Inflation Was Cooling Slowly

The July CPI report delivered a mixed picture.

Headline consumer prices rose 0.1% month over month after falling 0.4% in June. The annual inflation rate slowed to 3.4% from 3.5%.

Core prices increased 0.2% during the month, while the annual core rate declined to 2.5% from 2.6%. Shelter accounted for approximately two-thirds of the monthly increase in the headline index.

Food prices rose 0.1% in July, including a 0.3% increase in the cost of eating away from home. Energy prices declined 1.5%, led by a 2.9% decrease in gasoline prices.

Despite the monthly decline, energy costs were still 14.7% higher than a year earlier. Gasoline prices had increased 24.6% over the same period, according to the July CPI report from the Bureau of Labor Statistics.

Other July price movements included:

• Shelter prices increased 0.1% month over month and 3.2% year over year.
• Medical care costs rose 0.4% during the month.
• Airline fares increased 2.2%.
• Used car and truck prices rose 0.4%.
• Motor vehicle insurance declined 0.3%.
• Food prices were 3% higher than a year earlier.

The gradual decline in core inflation encouraged policymakers who believe the current interest rate level may already be sufficiently restrictive. However, the improvement could be challenged by higher fuel and transportation costs in August.

Energy Prices Could Keep Headline Inflation Elevated

Energy is likely to be one of the most important components of the August report.

US gasoline prices reached record levels for the month of August as the conflict involving the United States and Iran continued to disrupt energy shipments through the Strait of Hormuz. The national average gasoline price reached approximately $4.06 per gallon in mid-August, around $1 higher than a year earlier.

Brent crude subsequently climbed above $96 per barrel as further military activity increased concerns about a prolonged disruption to global oil supplies. Higher crude prices normally feed into gasoline, diesel, air travel, shipping and production costs.

Diesel prices are particularly important because diesel is widely used in freight and delivery networks. A prolonged increase can raise transportation expenses for food, retail products and industrial materials.

Higher energy prices do not automatically mean that the Fed will raise interest rates. Central banks frequently look through temporary commodity shocks because higher borrowing costs cannot directly increase oil production or reopen disrupted shipping routes.

The risk is that elevated energy costs spread into other categories. If companies begin passing higher fuel, freight and production costs to consumers, an initially temporary shock can become more persistent.

Strong US Jobs Data Has Raised the Stakes

The CPI report has become even more important following the stronger-than-expected August employment figures.

US employers added 162,000 jobs in August, significantly exceeding forecasts. The unemployment rate remained at 4.1%, average hourly earnings increased 0.3%, and payroll figures for June and July were revised higher by a combined 55,000 positions.

The employment report reduced concerns that a rate increase would immediately push the labor market into a serious downturn. It also gave the Fed more flexibility to focus on inflation.

Following the report, CME FedWatch pricing showed the probability of a 25 basis point September rate increase rising to 60.4% from 49.4% one day earlier. Other readings placed the probability near 58%, reflecting normal changes in futures pricing during the trading session.

The two-year Treasury yield, which is especially sensitive to monetary policy expectations, rose to approximately 4.37%. The ten-year yield traded near 4.77% after briefly climbing above 4.80%. The US dollar also advanced immediately after the employment figures before giving back part of its gain.

Federal Reserve Officials Remain Divided

The Federal Reserve has not reached an obvious consensus ahead of the meeting.

Fed Chair Kevin Warsh said at the Jackson Hole symposium that inflation had not improved sufficiently and suggested that policymakers might still have more work to do. His remarks were interpreted as keeping another rate increase under consideration.

Federal Reserve Governor Christopher Waller has taken a more conditional position. Waller said he would be inclined to leave rates unchanged if August inflation confirms that price pressures are cooling. He would consider supporting a rate increase if inflation comes in hotter than expected.

New York Fed President John Williams has also said he wants to see additional evidence before deciding whether current monetary policy is sufficiently restrictive.

Waller’s comments initially pushed the probability of a September rate increase back toward 50%. The strong jobs report subsequently lifted it again, demonstrating how sensitive market pricing has become to each new data release. Associated Press coverage of the Fed debate

The September meeting will also include a new Summary of Economic Projections. Investors will examine the updated interest rate projections to determine whether policymakers expect additional tightening later in 2026 or 2027.

How Could Markets React to the CPI Report?

The market response will depend on both the headline and core figures.

Hotter Than Expected Inflation

If headline inflation rises above 3.4% and core inflation fails to slow, the probability of a September rate hike could increase sharply.

A hotter report would likely support the US dollar and short-term Treasury yields. It could place pressure on growth stocks because higher yields reduce the present value of future earnings.

Gold and cryptocurrencies could initially decline as higher interest rate expectations increase the opportunity cost of holding non-interest-bearing or speculative assets.

Inflation Matches Forecasts

A 3.4% headline rate and 2.4% core reading would produce a finely balanced policy outlook.

The Fed would need to determine whether energy-driven inflation is temporary and whether the decline in core inflation is sufficient to justify holding rates steady. Market pricing could remain divided until the September 16 decision.

In this scenario, the monthly core CPI figure and the composition of services inflation may generate a larger market response than the annual headline number.

Softer Than Expected Inflation

If headline inflation falls below 3.4% and core inflation declines more quickly than expected, the probability of a September rate increase could drop substantially.

Lower inflation could pull Treasury yields and the US dollar lower while supporting equities, gold and risk-sensitive currencies. It would strengthen the case that current policy is restrictive enough without an additional increase.

Key CPI Components to Watch

Investors should look beyond the headline figure and monitor the following categories:

• Shelter: Housing costs remain one of the largest contributors to core inflation.
• Gasoline and diesel: Higher fuel prices could reverse July’s monthly energy decline.
• Food away from home: Restaurant prices can reveal whether wage and operating costs remain persistent.
• Transportation services: Airfares, vehicle insurance and delivery costs may reflect the energy shock.
• Medical care: Medical prices rose 0.4% in July and could influence core services inflation.
• Core goods: Used cars, apparel and household products may show whether tariffs and supply disruptions are reaching consumers.
• Services excluding shelter: This category can offer a clearer view of domestically generated inflation pressure.

The August CPI report is unlikely to settle the entire inflation debate, but it may decide the immediate direction of Federal Reserve policy. Strong employment has removed one potential obstacle to raising rates. The remaining question is whether inflation is cooling quickly enough to justify patience.