For household cost-of-living inflation, consumers should generally follow the Consumer Price Index (CPI), especially CPI-U. The Producer Price Index (PPI) adds context about prices received by domestic producers, but it tracks different transactions and is not a dollar-for-dollar forecast of what shoppers will pay.
As of October 4, 2026, the latest available BLS releases covered August: CPI-U all items rose 3.4% over the 12 months ending in August, while PPI for final demand rose 2.6% over that same period. These are different measures of different baskets, not a direct comparison of retail and wholesale inflation.
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What is the difference between CPI and PPI?
CPI measures the average change over time in prices consumers pay for a representative basket of goods and services. The BLS describes it as a measure of inflation experienced in consumers’ day-to-day living expenses. PPI is a family of indexes measuring average changes in selling prices received by domestic producers. It looks from the seller’s side and covers output sold to businesses, government, consumers, and export markets.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe BLS says the “best” measure of inflation depends on how the data will be used. For adjusting consumer payments so people can buy an equivalent basket at current prices, CPI is generally the better fit. PPI is often used to deflate revenue to measure real output and to analyze producer input costs or contract escalation.
| Comparison | CPI | PPI |
|---|---|---|
| Perspective | Prices paid by consumers | Prices received by domestic producers |
| Coverage | 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 imports are not produced domestically |
| Owner-occupied housing | Includes owners’ equivalent rent | Excludes owners’ equivalent rent |
| Sales and excise taxes | Included when tied to purchases | Excluded because they are not producer revenue |
| Third-party payments | Focuses on consumer-paid expenditures | Can include consumer-sector services paid for by insurers or government |
| Services | Consumer-service coverage | Incomplete coverage of its targeted services; 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 distinctions are described by the BLS PPI FAQ and its CPI–PPI comparison. Neither index is a universal measure of every price change, and they do not track identical baskets with only a timing difference.
Which CPI should consumers follow?
CPI-U is the broad national reference most consumers will encounter in inflation coverage. Its all-urban-consumer population represents over 90% of the total U.S. population, according to the BLS. That population coverage does not mean every household’s personal inflation rate matches the national average: spending patterns and the mix of goods and services each household buys differ.
For a household question, use CPI as a benchmark for changes in consumer prices, then consider the categories most relevant to your own budget. The national index is a broad average, not a personalized cost-of-living calculator.
Does producer inflation predict consumer inflation?
PPI can provide information about price pressure on the producer side, but it does not promise that consumer inflation will rise by the same amount or on a fixed schedule. A producer may absorb higher costs, change margins, or sell into business, government, or export markets rather than directly to consumers. Even when a producer price change affects a consumer-facing product, the size and timing of any retail-price change are not established by the PPI figure alone.
The BLS notes that data users sometimes treat PPI as a potential CPI indicator, while also explaining that the measures can diverge. Their different coverage of imports, housing, services, trade margins, taxes, and technical methods helps explain why. Use PPI as context about producer prices, not as a standalone forecast of a future household bill.
Why are CPI and PPI different?
They answer different questions and use different scopes and methods. CPI includes imported consumer goods and owners’ equivalent rent; PPI excludes both, while including many sales to businesses, government, and export markets. CPI prices include sales and excise taxes tied to purchases, whereas PPI prices exclude those taxes because they are not producer revenue. PPI can also include some services paid for by third parties, while its coverage of services in its target universe is incomplete.
There are technical differences as well: the indexes may categorize similar items differently, collect prices at different points and on different schedules, and use different weighting and formula practices. Those differences do not make either measure defective; they make each more suited to particular questions.
How to read CPI and PPI figures side by side
- Start with the question. For household cost-of-living changes, begin with CPI-U. For domestic producer selling prices or input costs, choose the relevant PPI series rather than assuming headline final demand answers every producer-side question.
- Identify the exact series and population. A headline CPI-U figure describes urban consumers, while a PPI figure must be identified by its series, such as final demand.
- Match the period and adjustment basis. Before comparing trends, check that the figures cover comparable time periods and use compatible seasonal-adjustment bases.
- Keep the measures in context. A side-by-side view can be useful, but CPI and PPI are not interchangeable and their gap is not a direct measure of retail-versus-wholesale inflation.
For example, the BLS reported that CPI-U all items increased 3.4% over the 12 months ending August 2026, while PPI for final demand increased 2.6% over the same 12-month period. The figures were the latest available in the BLS releases as of October 4, 2026; September releases had not yet been published. See the August 2026 CPI release and August 2026 PPI release for the official series and release details.
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