Nobody can tell you whether you owe Mexican tax, and anyone in Mérida, Mexico who answers it quickly is guessing. The question depends on where you are tax resident, which is not the same thing as which card INM gave you; on the source of each stream of income you have; and on a treaty. Those three inputs are specific to you, and two of them are determinations rather than facts.
So this post does not answer the question. It does something more useful: it breaks the question into the five parts a professional will actually work through, so that your first consultation is forty-five minutes of answers rather than forty-five minutes of them extracting your circumstances from you. The verdict, such as it is: budget one paid consultation with a Mexican contador and one with your home-country preparer, in your first year, and treat it as a setup cost rather than an optional extra.
Checked on 2026-10-08. This site does not give tax advice in either country, does not recommend structures, and takes no view on Mexico as a place to be taxed. What follows is the shape of the question and the preparation that makes it answerable.
Why nobody can answer this in one sentence
Because “do I owe Mexican tax” is at least four questions wearing one coat:
- Am I tax resident in Mexico?
- If I am, which of my income is within Mexico’s reach?
- If I am not, does Mexico still tax anything of mine because of where it arises?
- What does the treaty between Mexico and my home country do to the answers above?
Each of those has a different authority behind it, and the first is the one that surprises people most.
The pages that answer it confidently fall into two groups. Some are describing one person’s situation as though it were a rule. The rest are selling a consultation, a course or a relocation package, and a confident answer is the product. Neither is a reason to be anxious — it is a reason to get the question properly framed before you pay anyone.
Immigration residency and tax residency are different things
This is the single most load-bearing sentence in the post.
Holding a residente temporal or residente permanente card is an immigration status granted by INM. Being tax resident in Mexico is a separate determination under Mexican tax law, administered by SAT, using its own test. The two can coincide. They do not have to, and neither one decides the other.
The Mexican test is not simply a count of days in the country. It turns on where you have established your home in the relevant sense, with further rules that break ties when someone has a home in more than one country. Because it is a test with terms of art in it, the honest instruction is to read how SAT states it and then have someone apply it to your facts — not to work from a day count you read somewhere.
Two practical consequences:
You can hold a residency card and not be Mexican tax resident. People assume the card settles it. It does not.
You can become Mexican tax resident without intending to, by the ordinary business of setting up a life here. That is not a trap or a scandal; it is how residence tests work everywhere. It is simply a thing to know before it has happened rather than afterwards.
If your card is the part you are still sorting out, that is a different and prior problem — every route in, ranked by what it costs you.
The five questions it actually breaks into
Work through these in order. The answers to the early ones change which of the later ones matter.
1. Where am I tax resident, under each country’s own rules? Note that it is possible for two countries’ domestic rules to both say yes. That is what treaties are for, and it is why this question comes first.
2. What are my streams of income, and where does each one arise? List them individually: a state pension, a private pension, Social Security or CPP, portfolio dividends and interest, capital gains, rental income from a property back home, remote work performed from here, anything invoiced. Each one is analysed separately, and the answers genuinely differ between them.
3. Is any of it Mexican-source? Income arising in Mexico is treated differently from income arising elsewhere. Remote work performed while physically here, and rent from Mexican property, are the two that readers of this site most often have and most often misclassify.
4. What does the treaty say about each stream? Mexico has income tax treaties with the United States and with Canada, among others. Treaties allocate taxing rights and relieve double taxation, and they do it stream by stream — pensions can be treated differently from dividends, which can be treated differently from employment income. This is the step that most often changes the intuitive answer, in both directions.
5. What are the filing and reporting obligations, separately from the tax? Owing nothing and filing nothing are not the same. Reporting duties can exist where no tax is due, and they have their own deadlines and their own penalties.
That fifth one is the question people skip, and it is the one with the sharpest edges.
What your home country keeps asking regardless
Two things worth knowing before the consultation, because they catch people who assumed that leaving settled it.
If you are a US citizen or green-card holder, your filing obligation follows you. The United States taxes on citizenship, so a US person files regardless of where they live. There are mechanisms in US law intended to relieve double taxation for people living abroad — ask your preparer which apply to your streams, and do not assume. Separately, there are reporting regimes covering foreign financial accounts, which can apply to a Mexican bank account once its balance passes a threshold, independently of whether any tax is owed. Raise foreign-account reporting explicitly with your US preparer; it is the most commonly missed item for new residents, and it is a reporting failure rather than a tax one, which is why people do not see it coming.
If you are Canadian, ceasing to be a Canadian tax resident is a determination with consequences, and it is based on your ties rather than on a date you choose. Whether you have ceased residency, and what happens at the moment you do, is a question for a Canadian preparer before you need the answer rather than after.
Both of those are reasons the home-country consultation is not optional and is not replaceable by the Mexican one. They answer different halves.
The related mechanical point, which is not tax and is frequently conflated with it: Medicare does not travel. That is a cover question, not a tax one — what that means for your plan, mechanically.
What to bring to the first consultation
Assemble this once and both consultations get shorter and cheaper.
- A one-page list of every income stream, with its source country, its payer, its character (pension, dividend, interest, rent, employment, self-employment) and its rough annual amount.
- Your dates. When you arrived, how many days you have been in Mexico this calendar year, and whether you still have a home available to you back home.
- Your housing facts here. Owned or rented, lease length, and whether you have a Mexican address registered anywhere.
- Your card and status. Which residency type, granted when, and whether you have applied for anything else.
- Whether you have an RFC, and whether anyone has asked you for one — which is a separate question with its own answer: when a resident needs one.
- Your account list. Which countries hold your bank and investment accounts. This is what the reporting questions are answered from.
- Last year’s home-country return. The single most useful document in the folder.
- Your written questions, in priority order, because the hour will go faster than you expect.
Ask at the start what the engagement covers and what it costs, and ask whether they routinely handle foreign residents with your home country. Not every competent contador does, and the treaty questions are where the difference shows.
Who answers which part
A Mexican contador answers Mexican tax residency, Mexican-source income, Mexican filing and whatever registration follows. They are the authority on this side and they are not an authority on your home-country return.
Your home-country preparer answers your obligation at home, the relief mechanisms, and the reporting regimes. They are not an authority on Mexican law.
Both together, or one who genuinely works with the other, answer the treaty. This is the part where using only one of the two produces an answer that is half right, and half right is the expensive outcome.
SAT and the treaty text are the primary sources. Everything else, including this post, is a lead.
What this site will not tell you
Whether you owe. Whether to register. Whether to structure anything. Whether residency here is good or bad for your tax position, which is not a question this site thinks you should be choosing a city on.
What it will tell you is the cost of finding out, which is two consultations and an afternoon of assembling the folder above, and that this belongs in your first year rather than your third. Put it in the setup bucket with the other one-off costs — what month one costs before you have lived it — and re-examine it whenever your income streams or your days change materially, which for most readers means at the same February review as everything else: budgeting around a threshold that moves every year.