The U.S. credit-card law requiring repayment-time disclosures is the Credit CARD Act of 2009.
The Credit Card Accountability Responsibility and Disclosure Act, usually called the CARD Act, introduced consumer-protection rules for the U.S. credit-card market. One prominent disclosure requires statements to show an estimate of how long repayment could take, and how much interest could be paid, if the cardholder makes only minimum payments and adds no new charges.
The law also addressed advance notice of many rate increases, clearer statements, restrictions on certain fee practices, and payment-allocation rules. Its provisions generally took effect in stages, with major changes applying in 2010. The required payoff estimate is illustrative: actual results change when balances, interest rates, fees, or payment amounts change.
The CARD Act is a U.S. federal statute, so it should not be confused with broader financial laws such as the Truth in Lending Act. The latter supplies the wider disclosure framework, while the CARD Act specifically amended credit-card practices.