About

TimePriceIndex.com publishes the TPI-US 25, a fixed-basket time-price index of 25 US consumer goods and services with a 1980 base year and an AHETPI wage denominator. The index is rules-based, annually updated, and constructed from public primary sources. The site is part of the Clay Indices family of methodology-first index and reference sites maintained by George Clay.

Changelog

2026 — v1.0

Index inception. Initial basket of 25 constituents defined across food, energy, housing, transportation, communication and electronics, and services. Base year 1980, wage denominator AHETPI annual mean, equal weighting. Methodology v1.0 published.