Before you start

A CURP — the RFC is generated from it
Legal status permitting work, if you will be on a Mexican payroll
A comprobante de domicilio under three to four months old
Passport and resident card

Step-by-step

1
Register the RFC once the CURP exists
Inscribe yourself in the Registro Federal de Contribuyentes on the SAT portal using the CURP, or at a SAT appointment with ID and proof of address. Salaried people register under sueldos y salarios. Your employer can also register you in bulk.
OnlineWho: You or your employer's payroll teamOnline, often under an hourFree
2
Get the e.firma and the Constancia de Situación Fiscal
The e.firma digital certificate requires one in-person SAT appointment with fingerprints; the Constancia downloads instantly afterwards. HR, banks and landlords all ask for the Constancia, so treat it as a standing document you refresh rather than a one-off.
In personWho: YouOne appointmentFree
3
Hand HR the RFC and let payroll withhold
Your employer calculates and withholds ISR from every payment, remits it to SAT, and issues a payroll CFDI. You should see the withholding on the payslip. Nothing separate is paid by you, and the state's 3% payroll tax is the employer's cost rather than a deduction from your salary.
Via employerWho: Your employerFrom the first payroll run
4
If you are independent, look hard at RESICO
The Régimen Simplificado de Confianza taxes an individual's gross receipts at 1% to 2.5% of ISR, on a band scale, up to an annual ceiling of MXN 3.5 million, with monthly filings and no deductions. For a freelancer billing Mexican clients it is dramatically lighter than the general regime — but you must elect it, it excludes some situations, and exceeding the ceiling drops you out of it from the following month.
OnlineWho: Self-employed individualsElected on registration or at the start of a year
5
If you buy, get your ISABI band from the municipality before you budget
Puebla city applies the Impuesto sobre Adquisición de Bienes Inmuebles progressively: the rate depends on the property's value, with an exempt band at the bottom and rates reaching around 3% at the top. The 2026 Ley de Ingresos preserved the structure and updated values and tariffs for roughly 4% inflation without raising rates. Because most of Mexico charges a flat rate, calculators and guides written for the country as a whole will give you the wrong number here. Ask the notario or the municipality for the band that applies to your specific cadastral value.
In personWho: Property buyersBefore you agree a priceProgressive — exempt at the bottom of the scale, up to around 3% at the top
6
Pay predial early, and check which municipality you are actually in
Property tax is municipal and Puebla, San Andrés Cholula and San Pedro Cholula are separate governments with separate rates and separate early-payment discounts. The Angelópolis and Lomas de Angelópolis developments straddle the boundary between Puebla and San Andrés Cholula, so two apparently identical houses a street apart can be governed by different municipalities. Check the address, not the development name.
OnlineWho: Property ownersAnnually, discounted early in the year
7
Understand what actually makes you a Mexican tax resident
Contrary to the day-count rule people repeat, article 9 of the Código Fiscal de la Federación turns on where your casa habitación is. If you also keep a home abroad, Mexico looks at your centre of vital interests — deemed to be here if more than half your income in the year is Mexican-source, or if the main centre of your professional activities is in Mexico. The 183-day figure that circulates is a treaty and non-resident-employment concept, not the residency test.
OnlineWho: You

Documents you’ll need

CURP
Passport and resident card
Comprobante de domicilio
RFC, Constancia de Situación Fiscal and e.firma
Annual withholding summary from your employer, and any CFDIs you issue

Things most newcomers don’t know

Puebla's acquisition tax is progressive, and every national calculator gets it wrong.

Most Mexican municipalities apply a flat ISAI or ISABI percentage, so the tools and guides written for the country as a whole assume one. Puebla city has applied a progressive scale since 2025 — exempt at the bottom, rising to around 3% — and kept it for 2026 with inflation-only updates to values. On a modest purchase that can be a materially smaller bill than a flat-rate estimate suggests, and on an expensive one it can be similar. Either way, get the band from the notario rather than from a calculator.

Source: Ley de Ingresos del Municipio de Puebla 2026

Angelópolis is not one municipality, and predial follows the boundary rather than the neighbourhood.

The Angelópolis and Lomas de Angelópolis area straddles the line between the municipality of Puebla and San Andrés Cholula. The two set their own predial rates and their own early-payment discounts, and they run separate offices and deadlines. Buyers and tenants routinely assume the development is a single administrative unit and pay the wrong counter or miss the wrong deadline. Check the address on the escritura, not the marketing.

Source: Ley de Ingresos del Municipio de Puebla 2026 / community-reported

RESICO is the most valuable thing an independent professional here can learn about, and nobody mentions it.

The simplified regime taxes an individual's gross receipts at 1% to 2.5%, up to MXN 3.5 million a year, with simple monthly filings and no deduction bookkeeping. For a freelancer or a small consultancy billing Mexican clients, the difference against the general regime is enormous. It has to be elected, so people who register on autopilot as a general taxpayer often spend a year on the wrong regime.

Source: SAT

Puebla's state tax burden on employers is at the national norm, which is part of why the cluster is here.

The state's 3% payroll tax matches Jalisco and Nuevo León and sits well below Baja California's 4.25% and Quintana Roo's 4%. It never appears on an employee's payslip, but it feeds directly into the fully loaded cost of a hire, and it is one of several reasons the automotive supply chain concentrates in this corridor rather than further north. If you are costing a business rather than taking a salary, it belongs in the comparison.

Source: Impuesto sobre nóminas 2026, rates by state

Common mistakes to avoid

Budgeting a purchase from a national flat-rate ISAI calculator instead of Puebla's progressive scale.
Assuming an Angelópolis address is in the municipality of Puebla when it may be in San Andrés Cholula.
Registering as a general-regime taxpayer without checking whether RESICO fits.
Assuming no return is ever required after a year with two employers or income over MXN 400,000.
Letting the four-year e.firma lapse and hitting a wall at filing time.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.