For household cost-of-living inflation, consumers should generally follow the Consumer Price Index (CPI), especially CPI-U. The Producer Price Index (PPI) adds useful context about prices domestic producers receive, but it measures different transactions and is not a dollar-for-dollar forecast of what shoppers will pay.
As of October 4, 2026, the latest available releases showed CPI-U all items up 3.4% over the 12 months ending August 2026 and PPI for final demand up 2.6% over the same period. These are different measures of different baskets, so the 0.8-percentage-point gap is not a direct measure of the difference between retail and wholesale inflation.
What do CPI and PPI measure?
The U.S. Bureau of Labor Statistics (BLS) describes CPI as the average change over time in prices consumers pay for a representative basket of goods and services—the inflation reflected in day-to-day living expenses. PPI is a family of indexes measuring average changes in selling prices received by domestic producers. It views prices from the seller’s side and covers marketed output that can be sold to businesses, government, consumers, or export markets.
Neither index measures every price change in the economy. The BLS says the “best” inflation measure depends on its intended use. For comparing consumer purchasing power or adjusting payments so people can afford an equivalent basket at current prices, CPI is generally the better fit. For measuring producer selling prices or deflating revenue to estimate real output, PPI is more relevant.
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Why are CPI and PPI different?
The indexes do not track identical baskets with different release dates. Their populations, transactions, price treatments, and methods differ, so their readings can diverge without either being defective.
| Comparison | CPI | PPI |
|---|---|---|
| Perspective | Prices paid by consumers | Prices received by domestic producers |
| Target | Consumption purchases by urban U.S. households | Domestic producers’ marketed output, including business inputs and capital investment |
| Imports | Included when part of consumer purchases | Excluded because imported goods are not produced domestically |
| Owner-occupied housing | Includes owners’ equivalent rent | Excludes owners’ equivalent rent |
| Taxes on purchases | Includes sales and excise taxes tied to purchases | Excludes sales and excise taxes because they are not producer revenue |
| Third-party payments | Measures consumer-paid expenditures | Can include consumer-sector services paid for by insurers or government |
| Services | Consumer service coverage | Coverage of its targeted services is incomplete; residential rent and education services are among important consumer services absent from PPI |
| Common use | Cost-of-living adjustments and consumer purchasing-power comparisons | Deflating revenue to measure real output, input-cost analysis, and contract escalation |
These scope differences are only part of the explanation. The indexes can classify similar items differently, collect prices at different points and on different schedules, use different weighting and formula practices, and treat taxes differently. The BLS comparison explains these distinctions in more detail: How Does the Producer Price Index Differ from the Consumer Price Index?
Does producer inflation predict consumer inflation?
PPI can provide information about price pressure on the producer side, and some data users treat it as a potential CPI indicator. But a PPI increase does not guarantee that CPI will rise by the same amount or on a fixed schedule. Producers may sell to businesses, governments, consumers, and overseas buyers; consumer prices also reflect imports, housing costs, services, taxes, and trade margins. The different coverage and methods make a simple pass-through assumption unreliable.
For the same reason, headline PPI for final demand is not automatically the right PPI series for every producer question. A reader interested in a particular input cost or industry should look for the relevant PPI series rather than treating final demand as a universal producer-price measure.
How should you compare reported inflation figures?
- Start with the question. For household living costs, use CPI-U as a broad national reference. For domestic producer selling prices or business input costs, choose the PPI series that matches the transaction or industry.
- Identify the exact index. Check whether a report means CPI-U all items, PPI for final demand, or another series. The label matters because each index covers a different population and purpose.
- Match the time period. Compare the same month or same 12-month interval; do not juxtapose a monthly change with an annual change as if they were equivalent.
- Check seasonal adjustment. Make sure the figures use the same seasonal-adjustment basis before drawing conclusions about a trend.
- Read the number as context, not a conversion. CPI and PPI can be shown side by side, but one is not an interchangeable substitute for the other or a precise forecast of the other.
What do the latest CPI and PPI figures show?
In the BLS releases available on October 4, 2026, CPI-U all items rose 3.4% over the 12 months ending August 2026, while PPI for final demand rose 2.6% over that same 12-month interval. The first measures consumer prices for urban households; the second measures prices received by domestic producers for final demand. Their 0.8-percentage-point difference is not a like-for-like retail-versus-wholesale comparison.
The CPI-U population group represents over 90% of the total U.S. population, according to the BLS technical note, but that does not mean every household experiences the national average. Spending patterns and local price changes can make an individual household’s experience differ.
These are the latest figures only as of October 4, 2026. BLS had scheduled the September 2026 CPI and PPI releases for October 14 and 15, respectively; monthly figures can change as new releases arrive. Check the current BLS CPI release and BLS PPI release when using the data.
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