The short-term rental loophole, and Mexico
The short-term rental loophole is a piece of American tax vocabulary rather than a provision of any statute. It names what happens when two ordinary rules of the United States federal income tax meet each other: income from renting property is treated as passive and its losses are shut out, unless the average stay is short enough that the activity stops counting as a rental at all. Nothing in it is about Mexico, and nothing in it changes what a house in Mexico is or what that house owes.
Owners of exceptional houses here meet the term second-hand — in a note from an accountant, in a seminar aimed at American investors, in a message from someone who has just bought an apartment in Arizona — and the question that follows is always the same one: does any of it reach the house in Tulum. This guide takes the term apart in the country that coined it, then sets the Mexican house beside it: what survives the border, what does not, what the house generates in paperwork instead, and where each half is written down in a text anybody can open.
What is the short-term rental loophole?
It is the name given to a result rather than to a rule: when the average period of customer use of a property is seven days or less, the activity is not a rental activity for the purposes of the American passive activity rules, and an owner who materially participates in it can set its losses against income that is not passive. Nothing is being evaded — two ordinary provisions intersect, and the intersection produces an outcome that the usual treatment of rental property does not.
The first provision is the one that closes the door. Section 469 of the Internal Revenue Code says that for the taxpayers it describes, neither the passive activity loss, nor the passive activity credit, for the taxable year shall be allowed, and it defines a passive activity as one which involves the conduct of a trade or business and in which the taxpayer does not materially participate. Then it adds the sentence that catches every landlord in the country: the term passive activity includes any rental activity. The consequence is stated plainly by the Internal Revenue Service, which writes that a rental activity is a passive activity even if you materially participated in that activity, unless the participation was as a real estate professional.
The second provision is the one that opens a window in that door. The same IRS publication lists six situations in which an activity is not a rental activity at all, and the first of them is short stays: the average period of customer use of the property is 7 days or less. An activity that falls outside the definition of a rental activity is no longer passive by category. It goes back to the ordinary test, which is whether the taxpayer materially participates — involvement in the operations of the activity on a basis which is regular, continuous, and substantial.
So the whole of the term describes a sequence of three steps rather than a trick. Stays are short, so the activity is not a rental. It is not a rental, so it is graded on participation. The owner participates, so a loss on it is not locked away for a future year but lands against other income now. Where that matters most is where the loss is largest, and the loss is almost never operational: it comes out of writing the building off. That third step is the one that behaves differently outside the United States, and it is where the rest of this guide spends its time.
Which conditions does it actually depend on?
Three, and every one of them is measured rather than asserted: the average length of the stays across the year, the owner's own hours in the activity, and whether there is a deductible loss at all once the building is written off. Miss any one and the sequence produces nothing, because each step is what makes the next one available.
The first condition is arithmetic, not policy. A listing that says two nights minimum proves nothing; what counts is the year that actually happened, and the IRS sets out how to work it: you figure the average period of customer use by dividing the total number of days in all rental periods by the number of rentals during the tax year. One long winter let, in a house that otherwise takes weekends, is enough to pull the average over the line — which is a real risk on a Mexican coast, where a January-to-March booking is the ordinary shape of the season rather than an exception.
The second condition is hours, and it is the one that fails quietly for an owner who lives somewhere else. The publication sets out seven tests, and an owner needs to satisfy only one of them; the two that get quoted are that you participated in the activity for more than 500 hours, or that you participated for more than 100 hours and you participated at least as much as any other individual (including individuals who didn't own any interest in the activity) for the year. Read the parenthesis slowly. It counts everybody's hours, not only the owners', so a caretaker, a cleaner, a co-host or an administration office on the ground can each hold more hours than the owner does — and the second test then closes even when the first hundred hours were genuinely worked.
Why does a house in Mexico not map onto it?
Because the two tests survive the border untouched and the third condition does not: a building used predominantly outside the United States is written off on a slower schedule and is excluded by statute from the first-year allowance, so the loss the whole sequence is built on largely does not form. Meanwhile Mexico has no counterpart to any of this, because Mexican law sorts this income by what it is and never by how long a guest stayed.
The depreciation rule is the hinge, and it is short. The alternative depreciation system applies to any tangible property which during the taxable year is used predominantly outside the United States, which a house in Quintana Roo or Baja California Sur plainly is. Under that system residential rental property placed in service after 2017 runs over 30 years, straight line, rather than on the shorter general schedule — and the same statute then removes the first-year allowance entirely, because the term "qualified property" shall not include any property to which the alternative depreciation system under subsection (g) applies. A cost segregation study is commissioned in order to reach that allowance. On a house outside the United States there is much less at the end of it.
| What the treatment turns on | The rule that sets it | What a house in Mexico changes |
|---|---|---|
| Whether the activity is a rental at all | An average period of customer use of seven days or less | Nothing: a stay is counted the same way wherever the house stands |
| Whether the owner materially participates | Seven hour-based tests, of which one must be met | Nothing in the test and a great deal in the evidence: hours are harder to have, and harder to record, from another country |
| How the building is written off | The general depreciation schedule for residential rental property | Property used predominantly outside the United States goes on the alternative system, thirty years for property placed in service after 2017 |
| Whether a first-year allowance is available | Bonus depreciation, on property that qualifies | Property to which the alternative system applies is not qualified property |
| What the other country does in the meantime | Nothing: the passive activity rules are United States law and say nothing about Mexico | Mexico taxes the income where the property is, and asks for its own filings whatever the American return says |
The two rows that change nothing are worth as much attention as the two that change everything. The seven-day test does not care about the address, and neither does the hour count — which means an American owner does not lose the argument by owning abroad. What they lose is the size of the prize, and they gain a documentation problem: hours worked on a house eleven hundred miles away, in a country where the people doing the work are on the ground and the owner is not, are exactly the hours that the second participation test is designed to look at closely.
None of which is a conclusion about anybody's return. Whether a particular owner meets either test, in a particular year, on particular facts, is a question for that owner's own accountant working from that owner's own records — this page describes a mechanism and stops there, which is the only honest place for a page like this one to stop.
What does a Mexican rental house generate in paperwork instead?
A set of obligations that begins the day the house first produces income and never once asks how long a guest stayed: registration with the tax authority, accounting records, a fiscal receipt for every amount received, and provisional and annual returns. A separate registration applies to the house as a tourism service, and it has a deadline measured in days rather than years.
The federal income tax half sits in one chapter of the Ley del Impuesto sobre la Renta, the one covering income from granting the temporary use of real property. It opens by defining that income as what comes del arrendamiento o subarrendamiento y en general por otorgar a título oneroso el uso o goce temporal de bienes inmuebles, en cualquier otra forma — note that a lease and a sublease sit in the same sentence, which is why the arrangement described in the guide to rental arbitrage does not move the income out of this chapter. The obligations attached to it are a list of four: solicitar su inscripción en el Registro Federal de Contribuyentes, keep accounting records in accordance with the Código Fiscal de la Federación, expedir comprobantes fiscales por las contraprestaciones recibidas, and file provisional and annual returns.
What can be set against that income is also a list, and it is closed. It runs from property tax and local betterment contributions, through maintenance that does not amount to additions or improvements, real interest on borrowing used to buy or build, wages and fees paid, insurance premiums, and finally las inversiones en construcciones, incluyendo adiciones y mejoras — the building, written off here too, as an ordinary investment. The same article then offers an alternative that has no American equivalent at all: a taxpayer may instead optar por deducir el 35% de los ingresos a que se refiere este Capítulo, en substitución de las deducciones a que este artículo se refiere, plus the property tax. It is an option written into the statute, not a recommendation, and which of the two arithmetics a given owner should use is a question for that owner's accountant.
Then there is the half that is not about tax at all. A house let to guests is a tourism service, the Registro Nacional de Turismo is operado por los Estados, los Municipios y la Ciudad de México, and the deadline is short: providers of tourism services a partir de que inicien operaciones, contarán con un plazo de treinta días naturales para inscribirse. Below that sit the layers that actually vary from one address to the next — the state lodging tax, the municipal licence, the rules the building itself imposes on stays by the night. The short-term rental regulations that bind a particular house here are state and municipal before they are federal, and the short-term rental tax questions worth an owner's time are Mexican ones long before they are American. Both are set out, in one place, on the page about obligations and compliance.
Who files what, and in whose name?
It follows tax residence and the location of the property, never nationality: the income arises in Mexico because the house is in Mexico, and the person who files is the person who receives it. An owner who is not a tax resident of Mexico is taxed on the gross amount with no deductions at all, and whoever pays is required to withhold before paying.
The rule is in a different part of the same law, the part that deals with residents abroad. For income from granting the temporary use of real property, se considerará que la fuente de riqueza se encuentra en territorio nacional cuando en el país estén ubicados dichos bienes. The mechanism that follows is a single sentence, and it is the sharpest contrast in this entire guide: el impuesto se determinará aplicando la tasa del 25% sobre el ingreso obtenido, sin deducción alguna, debiendo efectuar la retención las personas que hagan los pagos. Where the payer is also resident abroad, the tax is paid by the taxpayer within fifteen days of receiving the income. The obligation to issue a fiscal receipt stays in place either way, and where the income arrives through a fideicomiso — which is how a great many foreign-owned coastal houses are held — the trustee institution issues the receipt and makes the withholding.
Read that beside the American term this guide started with. The entire architecture of the short-term rental loophole is an architecture of deductions: a loss, made large by depreciation, allowed against other income. For a non-resident owner the Mexican side of the same house offers no deductions whatsoever, because the tax is computed on the income obtained and nothing is taken off it. The two regimes are not versions of each other with different numbers. They are answering different questions.
The American return does not disappear in the meantime. The IRS is explicit that a citizen or resident alien is subject to tax on worldwide income from all sources and must report all taxable income, so rent from a house in Mexico belongs on it whether or not any of the treatment above applies. Where tax has been paid in both places on the same income there is a mechanism for it: an owner who paid or accrued foreign taxes to a foreign country or U.S. possession and are subject to U.S. tax on the same income may be able to take either a credit or an itemized deduction for those taxes. Whether that mechanism reaches a particular owner, and in what amount, is determined on that owner's own facts by that owner's own preparer.
Where is the primary source for each side?
Both halves of this subject have a free, public, primary text, and both are short enough to read on the point that matters. The American half is section 469 of the Internal Revenue Code and the IRS publication that explains it; the Mexican half is the Ley del Impuesto sobre la Renta and the Ley General de Turismo, in the versions the Cámara de Diputados publishes.
On the American side, 26 U.S.C. §469 carries the disallowance and the definitions, 26 U.S.C. §168 carries the depreciation rules including the one about property used outside the country, and IRS Publication 925 is where the seven-day exception and the participation tests are set out in ordinary language. On the Mexican side, the Ley del Impuesto sobre la Renta holds the chapter on income from granting temporary use of real property and, separately, the treatment of residents abroad; the Ley General de Turismo holds the tourism register and its thirty-day deadline.
There is a simple way to tell a primary text from a summary of one, and it is worth applying to anything else that arrives on this subject. A primary text names the date of its last reform on the front page and does not want anything from the reader. A summary — however competent, and many are — ends by offering a consultation, and it was written for the median reader of a country rather than for a person who owns one particular house in one particular Mexican state. The gap between those two things is where most of the confusion about this term is manufactured.
Where does an administration office fit in this?
Not in either tax seat, and it should not be invited into one. An administration office does not decide a return in Washington or in Mexico City; what it produces is the record that both of those desks work from — every amount received, every expense, every receipt, in the same shape every month.
That record is the unglamorous half of everything above. The participation tests are evidenced by contemporaneous documentation, the Mexican deductions are evidenced by comprobantes fiscales, and the withholding on a non-resident's income is only correct if somebody knows what was received and when. What arrives to the owner each month, line by line, is described on the page about monthly owner reporting, and the work behind those lines is set out on the page about full property administration.
What such an office cannot do, and what none should offer, is tell an owner how to treat any of this on a return. That is a question for a Mexican accountant on the Mexican side and an American preparer on the American one, working from documents rather than from an article. The useful contribution from this end is narrower and more durable: making sure the documents exist, arrive on time and agree with one another. What that arrangement costs, and what the number is calculated on, is a separate subject with its own guide to how property managers charge, and what the work consists of day to day is in the guide to what a property manager does.
Does the short-term rental loophole apply to a house in Mexico?
The two tests it depends on — an average period of customer use of seven days or less, and material participation by the owner — are tests about the activity and the taxpayer, not about the country the house stands in, so neither of them is failed simply because the house is Mexican. What changes is the size of what is left at the end: a building used predominantly outside the United States is depreciated under the alternative depreciation system, over thirty years for property placed in service after 2017, and the statute excludes property on that system from the first-year allowance. The loss the arrangement is built on is therefore much smaller, and often not there at all. Whether it reaches a particular return in a particular year is a question for that owner's own accountant.
Is there a Mexican equivalent of the short-term rental loophole?
No, because Mexican income tax law does not classify this income by the length of a guest's stay in the first place. Income from granting the temporary use of real property is its own chapter, whether the arrangement is a lease or a sublease and whether the stay is three nights or three years, and what may be set against it is a closed list of deductions or, at the taxpayer's option, thirty-five per cent of the income in substitution for that list. There is no test that reclassifies the activity when stays get short, so there is nothing for a short-stay strategy to unlock.
Does an American owner pay tax twice on a Mexican rental house?
The same income is visible to both authorities: Mexico taxes it because the property is located in Mexican territory, and the United States taxes citizens and resident aliens on worldwide income from all sources regardless of where they live. The Internal Revenue Service provides a mechanism for the overlap — a taxpayer who paid or accrued foreign taxes to a foreign country and is subject to United States tax on the same income may be able to take either a credit or an itemized deduction for those taxes. How much of it reaches a particular owner depends on facts a page cannot know, and is determined by that owner's own preparer.
Does the length of a guest's stay change anything in Mexican tax law?
Not in the income tax treatment of the rent, which is the same chapter of the law whatever the stay length. It does change things elsewhere: a house let to guests is a tourism service, and providers of tourism services have thirty natural days from the start of operations to register with the Registro Nacional de Turismo, while state lodging taxes, municipal licences and the rules a building imposes on stays by the night all vary from one address to the next. Those are the rules that actually respond to how a house is used, and they are local before they are federal.