US Inflation — CPI Tracker & Purchasing Power

What Is CPI and How Is It Measured?

The Consumer Price Index is produced monthly by the Bureau of Labor Statistics, which sends data collectors to survey approximately 94,000 prices across 75 urban areas of the United States. These prices cover eight major categories: food and beverages, housing, apparel, transportation, medical care, recreation, education and communication, and other goods and services. Each category is weighted by how much the average urban consumer spends on it — shelter alone accounts for roughly 36% of the total index.

The most commonly cited measure is CPI-U (All Urban Consumers), which covers approximately 93% of the US population. A parallel measure, CPI-W (Urban Wage Earners and Clerical Workers), covers about 29% and is used specifically to calculate Social Security's annual cost-of-living adjustment (COLA). Core CPI strips food and energy from the calculation because these categories are highly volatile — a single OPEC decision or drought can swing them sharply in either direction, obscuring the underlying inflation trend.

The Federal Reserve actually prefers a different measure: the PCE (Personal Consumption Expenditures) price index from the Bureau of Economic Analysis. PCE differs from CPI in its basket composition and weighting methodology — it allows for consumer substitution (if beef gets expensive, consumers buy chicken) and tends to run about 0.3–0.5 percentage points below CPI. The Fed targets 2% PCE inflation, not 2% CPI, which is an important distinction when evaluating whether policy is tight enough. As of May 2026, CPI is at 3.2% and core PCE is estimated near 2.7%.

What Is Driving Inflation in 2026?

The single largest driver of above-target inflation in 2026 is shelter costs. Housing makes up roughly 36% of the CPI basket, and rent of shelter plus owners' equivalent rent (OER) are both running at elevated rates due to a structural shortage of housing units in the United States. The National Association of Realtors estimates the US is underbuilt by 4–7 million housing units relative to demographic demand — a shortfall that took over a decade to accumulate and cannot be resolved quickly through monetary policy alone.

Service-sector inflation is the second major driver. Service prices are closely tied to wage costs, and the labor market remains tight by historical standards with unemployment near 4.2%. When wages rise, businesses in labor-intensive sectors — restaurants, healthcare, personal services — pass the cost to consumers. This "wage-price" dynamic is precisely what makes services inflation stickier than goods inflation. A tariff on imported goods creates a one-time price adjustment; wage growth creates a persistent monthly cost that compounds over years.

Tariff pass-through has added an estimated 0.5–0.8 percentage points to goods prices in 2025–2026 as trade policy changes raised the cost of imported inputs across electronics, apparel, and household goods. Energy prices have moderated significantly and are actually in deflationary territory year-over-year, which is why headline CPI (3.2%) is below core CPI (3.4%). Food costs are also moderating as supply chains normalize from the post-COVID disruption. The primary inflation pressure today is structural — housing and services — rather than the broad-based commodity surge seen in 2021–2022.

How Inflation Erodes Savings and Retirement

The Rule of 72 provides a simple shortcut for understanding inflation's long-term damage: divide 72 by the inflation rate to get the approximate number of years until purchasing power is cut in half. At 3.2% inflation, purchasing power halves in approximately 22.5 years. This means a retiree with $500,000 in cash savings at age 65 would see that cash's real value reduced to roughly $250,000 by age 87 — even without spending a dollar, simply from inflation's silent erosion.

The practical impact is significant. $100,000 held in cash earning zero interest becomes worth only $72,700 in real purchasing power after 10 years of 3.2% inflation. Even earning 4.5% in a high-yield savings account, the real return — the nominal interest rate minus inflation — is only 1.3%. The difference between the nominal return people see on their statement and the real return they actually receive in purchasing power is one of the most misunderstood financial concepts in personal finance.

Social Security benefits are adjusted annually for inflation via the COLA mechanism, which uses the CPI-W measure. This provides partial protection for retirees who receive Social Security, but the COLA has historically lagged actual cost increases for older Americans (who spend more on healthcare and housing, two of the fastest-rising categories). Financial planners generally recommend building retirement portfolios that generate real returns above inflation, using instruments like equities (historically +7% real over long periods), real estate, Treasury Inflation-Protected Securities (TIPS), and potentially inflation-resistant physical assets. For more on precious metals as inflation hedges, see the Precious Metals page.

The Fed's Inflation Mandate

The Federal Reserve operates under a dual mandate established by Congress: maximum employment and stable prices. In 2012, the Fed formalized its inflation target as 2% per year as measured by the PCE index. This target was chosen as low enough to provide the benefits of near-price stability (predictability for businesses and consumers, protection of savings) while high enough to reduce the risk of deflation and provide room for the Fed to cut rates in a recession without hitting zero.

Since March 2022, the Fed raised the federal funds rate from 0.25% to 5.5% — the fastest hiking cycle since Paul Volcker's era — before beginning to cut in late 2024. By May 2026, the target range is 4.25–4.50%. The history of central banking shows that achieving and maintaining exactly 2% inflation is extraordinarily difficult. The US experienced sustained sub-2% inflation from roughly 2012 to 2020, then dramatically overshot to 9.1% in June 2022, and is now gradually returning toward target — a journey that has taken over four years and is not yet complete. The lesson: inflation is easier to create than to eliminate, and the costs of fighting it (higher interest rates, slower growth, higher unemployment) are real and politically painful.