When the SAT collects by force: the PAE explained — and why your assets shouldn't live where the risk is

The SAT cannot simply "collect however it pleases" — you have a right to a hearing and a right to defend yourself. But the system has an architecture every business owner should understand before they need it: the authority does not litigate without collateral, and when the defense runs out (or never existed), its collection arm seizes with an efficiency that surprises anyone who believed "that takes years."

First: fighting costs a guarantee

Once a tax assessment is determined, you have a window (30 business days, as a general rule) to pay it or guarantee it. If you want to suspend collection while you litigate, you must guarantee the tax interest (art. 141 CFF): a deposit, a letter of credit, a bond, a pledge, a mortgage, an administrative seizure of your own assets, or securities. An important nuance in your favor: the administrative appeal (recurso de revocación) before the SAT itself suspends collection without posting a guarantee while it is being processed — one of the tactical reasons to start there. In the trial before the Court, the guarantee is the price of admission.

Then: the PAE, the collection arm

With no payment, no guarantee and no live defense, the Administrative Enforcement Procedure (PAE) kicks in (arts. 145 et seq. of the CFF): a payment demand, seizure of assets or of the business itself, appraisal and auction. In modern practice, the first blow is almost always the most efficient: the freezing of bank accounts — one order to the CNBV (the banking regulator) and your treasury is frozen by morning. Then come real estate, vehicles, machinery, accounts receivable. And meanwhile the assessment fattens: late-payment surcharges at 2.07% per month in 2026, plus enforcement costs.

The structural lesson: OpCo is not AssetCo

From here comes the oldest and most enduring principle of wealth protection: the company that operates — the one that invoices, contracts, has employees and therefore generates the risk — must never be the owner of the valuable assets. The real estate, the critical machinery, the brand and the investments live in separate entities (a real-estate company, an asset-holding entity, a holding company) that rent or license them to the operating company at market value. If the operating company faces a tax assessment, a labor lawsuit or a commercial dispute, whoever comes to collect finds a company with cash flow but no loot — and the negotiation changes character.

Now, the three pieces of fine print that separate planning from self-deception:

• Timing is everything. Separating assets before any contingency is ordinary corporate planning — defensible and standard. Transferring assets once an assessment is already determined or on its way is a different story: the CFF presumes fraud against creditors in transfers made after the notification of certain acts, joint-and-several liability of shareholders and directors can reach you (art. 26 CFF), and the acts can be voided. Label: red zone.
• Market prices between your entities. The rent from the real-estate company to the operating company is a related-party transaction: contract, appraisal or comparables, and real payment. Without that, the protective structure becomes your next tax contingency.
• Substance rules. Entities without real administration, without accounting and without a business reason get pierced — the corporate veil protects whoever respects it first.