In Mexico City, a peer-to-peer loan is unrestricted but should be put in writing, backed by a pagaré, paid through SPEI and reported to the SAT above 600,000 pesos, while the capital's Policía Cibernética keeps issuing warnings about montadeudas apps.
A metropolis of more than twenty million people
Mexico City has about nine million inhabitants, and its metropolitan area, which spreads into the State of Mexico, exceeds twenty million. Informal-economy workers, UNAM students and expats settled in Roma or Condesa all borrow there in very different circumstances.
The Civil Code of the Ciudad de México
Since the 2016 reform, the former Federal District has become the Ciudad de México, with its own Civil Code. A loan between neighbours in Iztapalapa or Coyoacán falls under the mutuo, carrying a statutory interest rate of 9% when no clause sets one.
Unpaid pagaré and the capital's civil judges
A pagaré signed by the borrower opens the way to a juicio ejecutivo mercantil before the judges of the Tribunal Superior de Justicia de la Ciudad de México. The creditor has three years after the due date, after which the claim is time-barred.
The Centro de Justicia Alternativa before any lawsuit
The capital's Tribunal Superior de Justicia runs a Centro de Justicia Alternativa that offers mediation between private individuals. A rescheduling agreement signed before a certified mediator often spares the parties a long trial over a family loan that has gone unpaid.
Nacional Monte de Piedad, the pawn-based alternative
Founded in 1775, the Nacional Monte de Piedad, whose historic headquarters stands beside the Zócalo cathedral, lends against jewellery, watches or electronic devices. Comparing its total cost with an offer from a private lender helps you resist an overly pushy informal lender.
Montadeudas: the October 2025 warning
In October 2025, the Policía Cibernética of the capital's security secretariat again warned about montadeudas apps: a small sum is paid out, hidden fees follow, then come threats to your contacts. See our page on the social media loan scam.
Fake bank and CONDUSEF advisers
Fraudsters pose as advisers from a major bank or even from CONDUSEF to demand a security deposit. The commission points out that it grants no credit at all; its financial fraud portal lists the entities whose names are being impersonated by scammers.
Office tandas and loans between colleagues
In Polanco offices as at the La Merced market, the tanda remains common: everyone contributes every fortnight and collects the pot in turn. It offers no legal protection; a written list of participants and dates helps keep disputes to a minimum.
Expats and digital nomads under pressure
Foreigners living in the capital, often paid in dollars or euros, receive loan requests from recent acquaintances. A temporary resident may lend, with a contract in Spanish and proof of transfer. See our feature on expats and peer-to-peer lending.
Obligations towards the SAT in the capital
Tax rules are federal: the borrower lists in the annual return any loan above 600,000 pesos combined with gifts and prizes, and the lender declares the interest earned. The capital's SAT offices see taxpayers by appointment for RFC questions.
Where to file a complaint in Mexico City
A scam victim files a denuncia with the Fiscalía General de Justicia de la Ciudad de México, sometimes online, and contacts the Policía Cibernética. CONDUSEF, headquartered in the capital, handles complaints aimed at a financial entity rather than at an individual.
Comparing with Guadalajara, Monterrey or Tijuana
Amounts, customs and frauds vary from one city to the next. Our guide to peer-to-peer loans in Mexico gathers the federal rules, and each local page then covers the courts and support networks of Guadalajara, Monterrey, Puebla or Tijuana.
Securing a private loan in the capital
- Meet the other party in person, in a public place or a bank branch, and check their INE credential and address in the capital.
- Draft a mutuo contract in Spanish stating the amount in pesos, the rate, the instalments and the jurisdiction of the CDMX courts.
- Attach a fully completed, dated and signed pagaré, never leaving a single box blank.
- Send the money through SPEI with the reference « préstamo », then download the Banxico comprobante electrónico de pago.
- If payments fall behind, propose mediation at the Centro de Justicia Alternativa before starting court proceedings.
- Report to the SAT any loan received above the 600,000 peso threshold and declare the interest collected.
Ballpark figures in the capital
| Item | Indicative cost (MXN) | Comment |
|---|---|---|
| Interest without a written clause | 9% a year under the local Civil Code | Indicative; agreed rate is free but reviewable |
| Pawn loan at Monte de Piedad | Rate and CAT displayed in branch | Compare the total annual cost |
| Ratification before a notario | Per the CDMX arancel (fee schedule) | Written quote recommended |
| Mediation at the Centro de Justicia Alternativa | Variable | Ask the centre directly |
| Fees charged by a montadeudas app | Withheld or demanded without transparency | Sign of a scam |
Paperwork to prepare in Mexico City
- Credencial para votar, passport or residence card for a foreigner
- CURP and RFC of both parties
- Comprobante de domicilio less than three months old
- Recibos de nómina or bank statements proving income
- Signed mutuo contract and pagaré
- SPEI comprobantes for every payment and repayment
Loan scams spotted in Mexico City
- Downloading a credit app seen in an advert promising a « sin buró » loan in ten minutes and demanding access to your contacts.
- Paying a « security deposit » to a fake bank or CONDUSEF adviser: no public body sells credit to anyone.
- Lending cash to a tanda colleague with nothing in writing, relying solely on a promise made at the office.
- Accepting a lender who insists on a deposit at a convenience store or in cryptocurrency before releasing any money.
- Letting three years pass after the due date of an unpaid pagaré without acting, which forfeits the claim on the note.
Questions from Mexico City residents
Is the Monte de Piedad safer than a private lender?
It is a long-standing, identifiable private assistance institution with displayed conditions and a published CAT. A private individual may offer better terms, but without guaranteed transparency. Compare the total cost, the timeframe and the risk of losing the item you pawned.
Can I report a fake lender online in Mexico City?
The capital's Fiscalía General de Justicia lets you file certain denuncias online, to be completed if needed at a Ministerio Público office. Attach screenshots, phone numbers, transfer references and the name of the app you used.
Can a foreigner living in Mexico City lend to a Mexican friend?
Yes, nothing prohibits it. Write the contract in Spanish, have a pagaré signed and pay through SPEI. If you remain taxable in another country, check with an adviser how interest must be declared in both jurisdictions.
Can CONDUSEF settle a dispute with a friend?
No. The commission handles complaints against financial institutions. For a loan between two individuals, the route is mediation at the Centro de Justicia Alternativa or a claim before the civil judges, ideally with a lawyer.