The Truth in Lending Act (TILA) is a United States federal law designed to protect consumers in credit transactions by requiring clear disclosure of key terms of the lending arrangement and all costs. The statute is contained in title I of the Consumer Credit Protection Act, as amended (15 USC 1601 et seq.). The regulations implementing the statute, which are known as "Regulation Z," are codified at 12 CFR Part 226. Most of the specific requirements imposed by TILA are found in Regulation Z, so a reference to the requirements of TILA usually refers to the requirements contained in Regulation Z as well as the statute itself.

The purpose of TILA is to promote the informed use of consumer credit by requiring disclosures about its terms and cost. TILA also gives consumers the right to cancel certain credit transactions that involve a lien on a consumer’s principal dwelling, regulates certain credit card practices, and provides a means for fair and timely resolution of credit billing disputes. With the exception of certain high-cost mortgage loans, TILA does not regulate the charges that may be imposed for consumer credit. Rather, it requires a maximum interest rate to be stated in variable-rate contracts secured by the consumer’s dwelling. It also imposes limitations on home equity plans that are subject to the requirements of Sec. 226.5b and certain higher-cost mortgages that are subject to the requirements of Sec. 226.32. The regulation prohibits certain acts or practices in connection with credit secured by a consumer’s principal dwelling.

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