Mexico Turns the Screw: How the 2026 VAT Reform Is Reshaping Underwriting Margins

The end of VAT creditability on claim payments has turned a recoverable tax into a permanent cost for Mexican insurers, prompting Fitch to flag Mexico as its regional outlier and AM Best to move the country’s insurance segment to a negative outlook. Premiums are expected to rise 10 to 20 percent as carriers reprice.

Mexico has quietly become the most consequential exception to an otherwise benign Latin American market. Effective 1 January 2026, the country’s tax reform ended value-added-tax creditability for insurers on insurance claim payments, and it applies retroactively to claim-related VAT incurred during 2025. In practice a tax that was previously recoverable has become a permanent, non-recoverable cost embedded directly in the loss line. For a market competing hard on price, that is not a rounding adjustment, it is a structural hit to underwriting margin.

Two rating agencies, one direction of travel

The rating agencies have read the signal the same way. Fitch has singled out Mexico as the outlier in an otherwise steady 2026 Latin American insurance landscape, assigning it a ‘deteriorating’ sector view as inflation, intensified pricing competition and rising medical and auto claim costs strain underwriting margins. AM Best, in turn, revised its outlook on Mexico’s insurance segment to negative. The Mexican Insurance Association, AMIS, has estimated that premiums could rise between 10 and 20 percent in 2026 as carriers reprice higher net claim costs, the first full-year effects of the VAT change now flowing through pricing. Two independent agencies moving the same market in the same direction is a message worth taking at face value.

A soft global market meets a hardening local cost base

The Mexican squeeze is unfolding against a global backdrop of abundance. Aon places total reinsurance capital at a record US$790 billion at mid-year 2026, and property-catastrophe rates fell 20 to 25 percent or more for the best-performing North American accounts at the 1 July renewal. Yet the discipline the region still shows is instructive: loss-affected excess-of-loss programmes in Mexico renewed with increases of up to 35 percent, according to Howden Re, even as untouched programmes softened. The lesson is that capital abundance does not suspend the pricing of experience, and a reform that raises the true cost of every claim will, over time, have to be paid for in rate. Cedents and reinsurers that absorb the VAT shock without repricing are simply deferring the margin erosion, not avoiding it.

The specialist’s reading from Mexico City

For Power Re, a Mexican tax shock is not an abstract macro headline, it is a live underwriting input in a core market. In Group Life and Personal Accident the VAT change touches the claim line directly, and its discipline is the right one for the moment: price for the risk actually assumed, including the tax now permanently attached to each loss; reserve conservatively for a cost base that has genuinely stepped up; and resist the temptation to chase share in a market where competitors may be under-pricing a reform they have not yet fully absorbed. A softening cycle rewards the reinsurer that reads local structural change early and refuses to subsidise it. Mexico is where that discipline earns its keep, one carefully selected, correctly priced risk at a time.