The signal

Mexico remains compelling, but the easy nearshoring story is too thin.

For a UK manufacturer, Mexico can improve proximity to North American customers. It can also create new origin, compliance, security, energy and management risks.

What changed

USTR has started the USMCA joint-review process with Mexico, focusing on supply-chain security, rules of origin and reduced dependence on non-regional inputs. UK guidance confirms CPTPP entered into force between the UK and Mexico on 22 June 2026, but CPTPP origin treatment is not the same as USMCA origin treatment for US market access.

The origin trap

A UK component may enter Mexico through one preferential route and still fail to qualify for USMCA treatment after assembly. That means the board should separate Mexico as a domestic sales market, regional manufacturing base and US export platform.

Use CAGE plus tariff-origin risk

Cultural, administrative, geographic and economic distance still matter. Add one extra overlay: can the product prove the origin route needed for the intended customer? Without that, the beachhead case becomes a compliance gamble.

The worked example

A UK machinery supplier may use Mexico for service proximity and final configuration, but still need strict controls over non-regional inputs, customs files, customer obligations and local management capacity.

The board question: Are we using Mexico because it strengthens the operating model, or because it sounds like an easy route into the United States?

Boundary. This is a commercial framework, not customs, tax, legal or financial advice. A company-specific position needs current official guidance, product codes, supplier evidence, customer terms and specialist review.