What is a tanda and how does it work

How a tanda works, round by round

A tanda is a group of people who agree to pay the same amount on a fixed schedule and take turns receiving the whole pot. On each payment date everyone contributes, that round's recipient gets all of it, and the next round goes to the next person. The tanda ends once every member has had a turn. Anthropologist Shirley Ardener, who wrote the first academic description of these groups in 1964, defined them as an association of participants "who agree to make regular contributions to a fund which is given, in whole or in part, to each contributor in rotation." The Federal Reserve Bank of Philadelphia opens its 2006 discussion paper on the subject with that definition.

Someone has to run it. A September 2026 Imagen Radio report on guidance from CONDUSEF, Mexico's financial consumer protection agency, describes the organizer as the person who coordinates the contributions, sets the order of turns and follows up on payments. Money can change hands in cash or electronically. In a 2023 University of Minnesota study of Mexican American tanda members, published in the Journal of Family and Economic Issues, some organizers travelled around town collecting and delivering cash, while in other tandas each member sent their share straight to that round's recipient through a mobile banking app.

The length follows from the size. A tanda with ten members has ten rounds, one for each member, as the Minnesota study notes. The Philadelphia Fed paper puts the typical group at 10 to 12 people, though some include upward of 300, and reports pots as small as $100 and as large as $40,000 or more.

What each member pays and gets back

The Philadelphia Fed paper walks through a simple case. An organizer who needs $1,000 gathers nine people he trusts, and each of the ten, organizer included, puts in $100 at every meeting. The organizer takes home $1,000 after the first meeting, another member takes the $1,000 collected at the next one, and so on until everyone has had the pot. With monthly meetings the circle lasts ten months and then disbands.

Over the full cycle, everyone pays in the same total and receives the same total. In the paper's five person table, each member pays $100 a month for five months, $500 in all, and receives one pot of $500, so nobody gains or loses on paper. What differs is timing. Every member except the last gets the lump sum sooner than they could have saved it alone, and the last member gets it in the same month they would have by saving on their own.

That balance holds only if everyone keeps paying. Each pot is simply the sum of that round's contributions, so one missing payment shrinks the pot for whoever is due. A member interviewed in the Minnesota study put it plainly: everybody has the chance to get what they put in, and that is why everybody has to pay, so that one person does not get five hundred while the third gets only four hundred. BBVA Mexico lists the same effect among the downsides of tandas: if a participant drops out, you receive less.

Who goes first, and why the order matters

Because the totals match, the order is where the real difference sits. The Philadelphia Fed paper describes the first recipient as effectively receiving an interest-free loan, while everyone after them starts out as a lender to the group. For a tanda whose order is random, the paper suggests it is best understood as a form of forced saving rather than a string of loans.

Groups set the order in different ways. The Fed paper lists random assignment, social standing and bidding, and notes that the organizer normally takes the first pot in return for doing the administrative work. In the Minnesota study the order was agreed before the tanda began. Members with the most urgent need took the first spots, the organizer was generally first, people with less pressing reasons were often randomized into the middle, and some asked for the last number so they would finish with a lump sum for a big purchase.

Other circles leave the order open and draw a name each round. Indonesian Wikipedia describes arisan members paying monthly as agreed, with the recipient chosen by lottery. Korea's National Institute of Korean History, describing the women's savings clubs that spread after the Korean War, explains that in a chucheom-gye each round's recipient is drawn from the members who have not yet been paid.

The same circle under other names

Tanda is the usual name in Mexico, and cundina refers to the same thing there. Wikipedia's article on tandas lists other Latin American names, including junta in Peru, cuchubal in El Salvador and Guatemala, and polla in Chile, and notes that these groups go by more than 200 names worldwide.

Economists call the general form a rotating savings and credit association, or ROSCA. Wikipedia's ROSCA article lists dozens of local names, among them susu in West Africa and the Caribbean, pardna or pardner in the West Indies, stokvel in South Africa, hui in Chinese communities, paluwagan in the Philippines, arisan in Indonesia, equb in Ethiopia, gam'eya in Egypt, kameti in Pakistan and gye in South Korea.

Some versions swap the fixed order for bidding. In the bidding circles the Philadelphia Fed paper describes, members who have not yet received bid for the pot each round, and the winning bid is taken off the contributions of the members still waiting. Early recipients end up paying in more than they take out, and later ones receive more than they paid. Korea's nakchal-gye and the arisan call of Sumatra, known there as julu julu or jula jula, work on a similar auction idea. In a tanda with fixed contributions and no bidding, everyone's totals come out equal, as in the five person example above.

What can go wrong

The main risk is that someone stops paying. Imagen Radio's report on CONDUSEF guidance notes that one person's failure to pay can affect everyone else, and that no financial institution guarantees the contributions or covers money a participant stops handing over. The exposure is largest with members who have already taken the pot. The Philadelphia Fed paper points out that a participant can move away after receiving their turn and start over somewhere else, and Wikipedia's ROSCA article notes that circles typically last no more than six months, which limits the loss if someone takes the money early and does not pay it back.

When a member defaults, the organizer often absorbs it. The Philadelphia Fed paper says members count on the organizer to handle collections "even if it means assuming the payments of a defaulting member," and a participant in the Minnesota study described her sister, an organizer, having to keep paying after a member ran off with the pot. The trust runs both ways. Members, the Fed paper adds, have to believe the organizer will not disappear with the funds after the first round.

BBVA Mexico sets out the structural limits. The money earns no interest, it can lose value to inflation while you wait, you cannot use it before your turn, and there is no guarantee or legal mechanism to fall back on if you are not paid. Outside events matter as well. One tanda in the Minnesota study was paused during Covid-19 because several members had lost work, leaving a member who had already put in $500 unsure whether it would ever restart.

This guide explains how tandas commonly work. It is not financial or legal advice. For decisions about your own money, talk to a qualified adviser or your country's financial consumer protection agency.

How to tell a tanda from a pyramid scheme

Some schemes borrow the language of savings circles. The US Federal Trade Commission has warned about chain letter games spread on social media under names such as the Blessing Loom, Mandala Game, Infinity Loom and Giving Circle. The version it hears about most promises that you will collect $800 for $100: you pay the person at the center of an octagon-shaped board, take one of eight outer spots, and move toward the center by recruiting others. In June 2021 the FTC and the state of Arkansas sued the operators of one such program, Blessings in No Time, alleging it falsely promised returns as high as 800 percent and took tens of millions of dollars from thousands of consumers.

Mexico has seen the same pattern. In 2015 CONDUSEF warned savers about a scheme called Flor de la Abundancia that was circulating on social media, a pyramid in which each person invites two acquaintances who then repeat the model, according to an El Universal report carried by Vanguardia.

The difference is structural. A tanda has a fixed list of members, a fixed contribution and a known end, and each pot is only what the group paid in that round. It never needs new people to pay anyone. The FTC describes the schemes the opposite way: they "depend on recruiting new people to keep money flowing into the enterprise." An offer that promises several times your money back does not work like a tanda.

It also helps when the organizer can show the record: who is in the circle, the order of turns, and who has paid each round. Wikipedia's ROSCA article notes that circles meeting in person often keep only a rough list of slots, since everyone sees the money change hands. Tandalo, a ledger app for organizers, keeps a table of members and rounds on the organizer's phone and turns each closed round into a receipt card for the group chat. It never holds or moves the money itself.

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