Choosing the right corporate vehicle is one of the few decisions that is cheap to get right at the start and expensive to correct later.
The main options in Mexico
The Sociedad Anónima (S.A. de C.V.) is the standard vehicle for businesses expecting outside investment. Ownership is in shares, which transfer relatively easily, and it is the structure investors expect to see.
The Sociedad de Responsabilidad Limitada (S. de R.L.) works with partes sociales rather than shares, transfers require partner consent, and it is often preferred by United States investors for tax treatment reasons.
The Sociedad por Acciones Simplificada (S.A.S.) can be incorporated online by a single shareholder with no minimum capital, but it carries a revenue ceiling and is not suitable once the business scales.
What actually drives the choice
Whether you will raise capital, how many partners there are, expected revenue, whether foreign shareholders are involved, and how you plan to exit. Personal liability is limited in all three, but only if the formalities are respected: separate accounts, proper minute books, and resolutions recorded.
One thing founders forget
Decide from the outset which entity will own the intellectual property. A brand registered in a founder personal name while the company trades under it creates a problem that surfaces in the first round of due diligence.
The decision that outlives the choice
The corporate form sets how shares move, who may sign, how new investors come in and what happens when a founder leaves. All of it can be amended later, and all of it is harder and more expensive to amend than to get right at incorporation.
The part most often forgotten is the intellectual property. Incorporating with the trademarks, the software, the content and the domains assigned to the company costs nothing extra at the start. Moving them afterwards is a transfer, with its own formalities, and for copyright it has to be in writing or it is null by operation of law (article 30 of the Mexican Federal Copyright Law).
Watch the term when you do it: where a transfer states no duration, it is taken to last five years (article 33), with computer programs the express exception (article 103). A company that believes it owns its assets and in fact holds a lapsed five-year licence is a company with a diligence problem it does not know about.