What Is the Opinión de Cumplimiento?
The Opinión de Cumplimiento (literally, "compliance opinion") is the document Mexico's tax authority, the SAT, issues to confirm whether a taxpayer — an individual or a company — is current on their tax obligations: returns filed, payments up to date, and no unpaid final tax credits on record. It's also known as form 32-D, because the SAT issues it under article 32-D of Mexico's Federal Tax Code (Código Fiscal de la Federación). It's free, it's generated in minutes through the SAT's online portal, and the result can only be one of two things: positive or negative.
For any business that invoices in Mexico, bills government agencies, or wants to bid on a public contract, holding a positive Opinión de Cumplimiento isn't optional — it's the gate that opens or closes those deals.
What Article 32-D Says and Why This Document Exists
Article 32-D of the Federal Tax Code establishes that no government authority — federal, state, or municipal — can contract goods, leases, services, or public works with anyone who has final unpaid tax credits, tax credits determined but not paid, or who isn't registered with the Federal Taxpayer Registry (RFC). The Opinión de Cumplimiento is how that authority verifies, quickly and in a standardized way, that a vendor meets that requirement before signing a contract.
Over time, the requirement to present a positive opinion expanded beyond public bids: it's now also requested for procedures like applying for subsidies and tax incentives, and for certain permits, licenses, or concessions issued by government agencies.
Positive vs. Negative: What Each Result Means
The SAT checks several points before issuing the result: whether you're current on filing your returns for recent fiscal periods, whether you have any final unpaid or unsecured tax credits, whether your RFC status is active and located, and whether the SAT's own system has flagged any omissions.
- Positive opinion: no outstanding debts or omissions. You can use it to bid on contracts, work with government agencies, or present it to a client or vendor who requires it.
- Negative opinion: the SAT found at least one pending obligation — an unfiled return, a missed payment, a final tax credit — and won't let you proceed with the related procedure until it's resolved.
A negative result doesn't mean starting over. It usually points to one specific issue that can be fixed, and once it's resolved, you can generate a new opinion right away.
How to Get the Opinión de Cumplimiento on the SAT Portal
Getting the Opinión de Cumplimiento is a free online procedure that doesn't require an in-person appointment:
- Go to the SAT portal and find the "Opinión del cumplimiento de obligaciones fiscales" section.
- Log in with your RFC and password, or with your e.firma (Mexico's digital signature).
- The system automatically checks your RFC status, your filed returns, and any outstanding tax credits.
- If everything is in order, the system immediately generates the positive opinion as a PDF, with a folio number and issue date.
- If it finds a pending item, the system shows the specific reason for the negative result — which return is missing or what debt exists — so you can fix it.
You don't need to submit any extra documentation or file a written request: the result is generated from the information the SAT already has on record for your RFC.
How Long the Opinión de Cumplimiento Is Valid
The Opinión de Cumplimiento is valid for 30 calendar days for most procedures, such as public bids or contracts with government agencies. For subsidies and tax incentives, some programs use a different validity window, so it's worth checking the specific requirements of the call before submitting it. Once it expires, the document is no longer valid and you need to generate a new one from the portal, which takes the same couple of minutes as the first time.
Who Needs to Present an Opinión de Cumplimiento
The clearest case is a business that wants to bid on a public contract or sign an agreement with a federal, state, or municipal government agency: without a positive opinion, the contracting authority can't formalize the contract, no matter how competitive the proposal is.
But this document isn't limited to the public sector anymore. It's increasingly common for:
- Other businesses to ask their vendors for a positive Opinión de Cumplimiento before closing an important contract, as part of their own vendor due diligence.
- Banks and lenders to request it as part of a business credit or financing application.
- Trade associations and chambers to require it as a condition for certain programs or sector certifications.
In all of these cases, presenting a positive opinion works as a signal that the business runs a clean operation in the eyes of the SAT — something that carries as much weight as commercial references when someone decides who to work with.
What to Do if Your Opinión de Cumplimiento Comes Back Negative
When the result is negative, the SAT's system points to the exact reason: it could be a monthly or annual return that was never filed, a payment that wasn't recorded on time, or a final tax credit that's still outstanding. The first step is identifying exactly which of those applies to your case by reviewing the detail shown on the document itself.
From there, the fix depends on the cause: filing the missing return, settling or clarifying the pending payment, or reaching an installment payment agreement with the SAT when the debt is too large to cover in one go. Once the underlying issue is resolved, you can generate a new opinion; if the system already reflects the change, the positive result shows up right away.
Keeping Your Invoicing Clean So You're Never Caught Off Guard
The most common reason behind a negative opinion usually isn't fraud or a serious error — it's a return filed late, or CFDI invoices issued incorrectly or never reconciled, creating differences from what the SAT expects to see. When a business's invoicing is in order — correct CFDI, payment complements issued on time, consistent tax information — the Opinión de Cumplimiento tends to come back positive without surprises.
That's why businesses that invoice frequently, or that depend on public bids and government contracts, benefit from relying on tools that keep CFDI invoicing clean and current, instead of discovering an error right when a positive opinion is needed urgently. If your business is already clear on the requirements for invoicing in Mexico, it's much easier to avoid the gaps that later turn into a negative opinion.
Automating processes like CFDI generation, payment reconciliation, and tracking SAT filings cuts down the human error that's usually behind a forgotten return; process automation tools help these controls run on their own day to day, and the same logic applies to other tax procedures, like the one we cover in our guide to the constancia de situación fiscal.
Frequently Asked Questions
How much does it cost to get the Opinión de Cumplimiento from the SAT?
It's free. The SAT doesn't charge to generate the Opinión de Cumplimiento; you just need your RFC with a password or e.firma to log in to the portal and download it.
How long does it take to generate the Opinión de Cumplimiento?
It's generated instantly on the SAT portal, in a matter of minutes, because the system automatically checks the tax information already on record for your RFC.
Can I get the Opinión de Cumplimiento for another company?
Not directly. Each taxpayer can only generate their own Opinión de Cumplimiento using their own RFC and portal access; if you need one from a vendor, you have to ask them to share it with you.
What if I need the Opinión de Cumplimiento urgently and it comes back negative?
It depends on how quickly the underlying issue can be fixed: if it's a return you can file immediately, a positive result can show up the same day; if the debt requires an installment payment agreement, the process takes longer.
Is the Opinión de Cumplimiento used for anything beyond public bids?
Yes. More and more businesses, banks, and trade associations request it as part of their review before closing contracts, extending credit, or onboarding a new vendor, even when there's no public bid involved.
If your business depends on keeping a positive Opinión de Cumplimiento to bid on contracts or hold on to demanding clients, at AISDC we help put your CFDI invoicing in order — correct issuance, on-time payment complements, and automatic reconciliation — so that this procedure is never the reason you lose a contract.