The Senate of the Republic approved the fiscal package for 2027 on October 27, 2026, authorizing net domestic borrowing of up to 1.7 trillion pesos and a Revenue Law of 10 trillion 636 billion 488.1 million pesos, according to Aristegui Noticias. The decree passed in general with 75 votes in favor and 34 against.

The package sets the framework under which companies and taxpayers will operate starting in 2027. Along with the Revenue Law, the Senate endorsed reforms to the Income Tax Law that establish limits and conditions on the use of authorized deductions and tax losses, and an update to the Federal Duties Law. According to El Financiero, the ISR bill returned to the Chamber of Deputies to continue the constitutional process, while the Federal Duties Law was sent to the federal executive.

The rationale for the ISR adjustment appears in the figures of the decree itself: of 737,000 companies that filed the tax, 524,000 reported positive income and 318,000, or 60.1%, paid nothing by citing tax losses, according to data from the Tax Administration Service. The text expands the Simplified Trust Regime, with a payment of 125,000 pesos in ISR for individuals with annual income of up to 5 million pesos, and raises the income limit for legal entities from 35 to 50 million pesos. It also raises the exempt limit for agricultural, livestock, forestry and fishing activities from 900,000 to one million pesos. The duties update includes fees for migration and consular services, animal and plant health certifications, and the use of 600 and 700 MHz frequency bands. The debt authorization includes up to 160 billion 619.5 million pesos in domestic borrowing for Pemex and 16 billion 742 million for the CFE.

The next step is review in the Chamber of Deputies, which must process the ISR bill. Participating federal revenue was estimated at 5 trillion 722 billion 752 million pesos, the base that will define transfers to states and municipalities during 2027.

This article was written with the assistance of artificial intelligence from verified sources and reviewed by a human editor before publication.