Paying in Installments: When It Helps and When It Hurts

Few phrases sell as well in Argentina as "12 cuotas sin interés." Paying for a fridge, a phone or a pair of sneakers over several months makes big purchases feel affordable, and with high inflation it can even be the smart choice. But installments are also one of the easiest ways to spend money you have not earned yet. Knowing when they work in your favor, and when they quietly work against you, is one of the most useful money skills you can have.

First, when they help. If the price in installments is the same as the cash price and there is truly no interest, paying in installments is usually a good deal. Each payment is a fixed amount, and if prices and salaries rise in the meantime, the later payments weigh less and less. Meanwhile, the money you did not spend upfront can sit in an interest-bearing account. The catch is that "no interest" often hides a cash discount: if paying upfront gets you 10% or 15% off, compare that discount with what the money would earn during the months you would be paying. If the discount is bigger, the installments are not free.

Then, check the real cost. When installments do carry interest, the advertised nominal rate (TNA) is not the whole story; in Argentina, lenders must show the total financial cost, the CFT, which includes taxes and fees and is usually much higher. That is the number to compare. And the most expensive kind of installment of all is the one you do not see: paying only the minimum on your credit card statement. Whatever is left over is financed at some of the highest rates in the market, and a purchase that was "interest-free" can become very expensive in a few months.

The biggest danger, though, is not any single purchase — it is stacking them. Each installment looks small on its own, and that is the trick. Three months later you have six of them running at the same time, and a large part of next month's salary is already spent before it arrives. A useful rule is to look at the total of all your installments together, not each one separately, and to give it a ceiling — for example, never more than 10% to 15% of your monthly income. Before adding a new one, ask: if my income dropped next month, could I still pay all of these?

Mingüini can make that total visible. When you add an expense in Finance, mark it as a card purchase in installments and enter the number of payments: the app splits it into monthly entries — "Fridge (1/12)", "Fridge (2/12)" and so on — on the right dates. Browse the coming months in the Expenses tab and you will see exactly how much of each future salary is already committed. If those months look crowded, that is your signal to wait before the next purchase. Installments are a tool; used on purpose, they help you buy what you need. Used without looking, they buy your future months for you.