Rodrigo’s thumb hovered over the glass of his phone, the blue light reflecting off his delivery jacket in the dim Puebla twilight. He was staring at a number that didn’t make sense, or rather, a number that made too much sense once you did the math you weren’t supposed to do.
He had borrowed $1005 pesos to cover a sudden gap in his rent-a gap caused by a landlord who decided that “maintenance” was a suggestion rather than a requirement. Now, later, the MoneyCat app was asking for $1335.
He took a screenshot and zoomed in three times, his eyes tracing the line items like a forensic investigator. There it was: the principal, the ordinary interest, the “comisión por servicio,” and the “IVA sobre comisión.” Each was a tiny, manageable-looking number.
The visual discrepancy: $255 of the $330 increase consists of commission and tax, far outweighing the base interest.
But when he added the commission and the tax together, the total was $255. That commission alone was larger than the rent increase he had been trying to dodge. He sent the screenshot to his cousin with no caption, just a silent digital shrug that carried the weight of a thousand unpayable hours.
The Architecture of Missing Parts
I spent this morning trying to assemble a bookshelf that arrived with 5 missing cam locks. I thought I could outsmart the instructions. I thought I could just use extra wood glue and a bit of hope to bridge the gap where the hardware should have been.
It didn’t work. The shelf tilted 5 degrees to the left, a permanent monument to my own impatience and the manufacturer’s oversight. Looking at Rodrigo’s loan breakdown, I realized that microloans are designed exactly like that bookshelf.
They give you the wood and the screws, but they “forget” to tell you that the stability depends on a separate, hidden cost that you didn’t see in the box. In the Mexican fintech world, the most brilliant innovation isn’t the facial recognition or the 5-minute approval time. It is the cognitive separation of “interest” from “commission.”
My friend Nina N. is a water sommelier. It sounds like a made-up job until you sit across from her and she explains why the water you’re drinking tastes like a penny. She talks about Total Dissolved Solids-the stuff in the water that isn’t water.
“A loan is just a liquid asset. But the commissions are the sediment. If the sediment is 35 percent of the volume, you aren’t drinking water anymore. You’re drinking mud.”
– Nina N., Water Sommelier
She once told me that most people drink “contaminated” debt without ever tasting the minerals. She was swirling a glass of high-alkaline spring water that cost 85 pesos as she explained this.
When Rodrigo looks at his $1005 loan, the app presents him with an interest rate that looks competitive. Maybe it’s 1.5 percent or 5 percent. That’s the “water.” It’s clear, it’s understandable, and it’s what the regulations usually focus on. But stapled to the back of that water is the “service commission.”
The Mechanics of Shadow Borrowing
This isn’t a fee for the work done; it is a second, shadow loan. If you have to pay $255 to get $1005, you aren’t really paying a fee. You are borrowing the $255 from your future self to pay the lender for the privilege of the first loan.
It’s a debt stapled to a debt. The industry knows that if they folded that $255 into the interest rate, the “Total Annual Cost” (CAT) would look so monstrous that even a desperate person might blink. By labeling it a “commission,” they move it to a different part of the brain-the part that accepts administrative costs as inevitable, like the 15 peso “convenience fee” at a cinema.
But borrowing money is not like buying a movie ticket. The “convenience” of a loan is the money itself. Charging a fee to provide the money is effectively charging interest under a different name to bypass the psychological barriers of the borrower.
I made a mistake in my furniture assembly by assuming the missing pieces didn’t matter. Borrowers make a mistake by assuming the labels matter. When you see four different labels-principal, interest, commission, tax-your brain naturally focuses on the smallest one.
You think, “Oh, the interest is only $35.” You ignore the $225 commission because it feels like a one-time toll rather than a growing burden. The financial-services industry has spent millions of pesos researching this exact collapse of mental math. They know that if you present a single number, the customer compares it.
If you present four numbers, the customer stops calculating and starts trusting. It’s a sleight of hand performed with spreadsheets.
This is why resources that strip away the marketing jargon are becoming the only way to survive the app-based lending landscape. For instance, looking at a
breakdown reveals how these four labels eventually collapse back into one terrifying “total to repay” figure.
When you see the numbers side-by-side, without the distraction of “service fees,” the “mud” in the water becomes impossible to ignore.
The Branding of Contamination
I’ve noticed that the more “innovative” a lending app claims to be, the more labels it adds to the repayment schedule. It’s a direct correlation. If the technology were truly making the loan cheaper, they wouldn’t need to hide the cost in the “IVA sobre comisión” line. They would just show you the price.
Nina N. once walked me through a tasting of 5 different brands of bottled water, all of which looked identical. By the third bottle, I could taste the chlorine in the one that claimed to be “mountain fresh.” She laughed and said, “Now look at the label.”
Sure enough, the “mountain” was a processing plant 15 miles outside of a major city. The branding was the “interest rate”-the thing they wanted me to see. The chlorine was the “commission”-the reality of the process that they hoped I wouldn’t notice until it was already in my system.
Rodrigo’s cousin didn’t reply to the screenshot for . When he finally did, it was just a link to a debt strike forum. That’s the danger for these companies. When the “sediment” in the loan becomes too thick to swallow, the borrower doesn’t just get thirsty; they get angry.
They realize that the “service” they are paying for is actually the mechanism of their own entrapment.
There is a specific kind of exhaustion that comes from realizing you’ve been outmaneuvered by a font size. Rodrigo felt it in his shoulders as he drove his motorcycle through the 85-degree heat of a Puebla afternoon.
He was working for the “service” that gave him the loan, literally burning gasoline to pay for the “comisión por servicio” that had been stapled to his $1005.
The Delivery Fee Fallacy
We often talk about financial literacy as if it’s a lack of knowledge about math. It’s not. Rodrigo knows how to add. The problem isn’t literacy; it’s the intentional obfuscation of reality.
If I sell you a car for $5000 but charge a $2000 “delivery fee,” a $500 “steering wheel fee,” and a $255 “seatbelt tax,” I haven’t sold you a $5000 car. I’ve sold you a $7755 car and lied to your face about the starting point.
The microloan industry in Mexico is currently built on these “stapled” debts. They rely on the fact that when you are short on rent, you don’t have the luxury of being a water sommelier. You just drink whatever is in front of you.
But the cost of that drink isn’t just the $1335 on the screen. It’s the 5 extra days of work, the 45 missed meals, and the 25 sleepless nights spent wondering why $1005 feels like $5000.
I still haven’t fixed my bookshelf. It’s still leaning. Every time I walk past it, I’m reminded of the 5 missing pieces and my own decision to proceed anyway. I could have sent it back. I could have demanded the parts. But I was in a hurry. I wanted the “service” of having a shelf right now.
In the end, the transparency of the “total to repay” is the only metric that matters. Everything else-the sleek UI, the “instant” approval, the friendly notifications-is just branding on a bottle of tap water.
We have to stop looking at the interest rate and start looking at the stapled debt. Because the price is never just the price; the price is the sum of everything they hope you’re too tired to add up.
Rodrigo finally turned off his phone and put it in his pocket. He had 5 more deliveries to make before he could even think about heading home. As he pulled away from the curb, the leaning weight of his debt felt more real than the motorcycle beneath him.
He wasn’t just carrying packages anymore; he was carrying the “comisión” for a life that was becoming increasingly expensive to simply navigate.
And as Nina N. would say, once you taste the chlorine, you can never go back to believing the water is pure. You just learn how much poison you can tolerate before you finally stop drinking.