How to make the most of November sales without going into debt
I'm Hormi, and I know a lot about small things that turn into big ones. In November, deals come from everywhere, and the most expensive one is exactly the one you didn't plan. Before you buy, read this.
HormiThe small expenses that add up.
Updated
November, the month of sales
In Mexico, El Buen Fin 2026, the country's big annual sales event, runs from November 13 to 17, according to Expansión. In many other countries, November also brings Black Friday and Cyber Monday, with discounts in stores and online. They're good dates to buy what you already needed, and also the easiest ones for spending money you hadn't planned.
The trick behind sales is urgency: countdowns, “almost sold out,” prices that last a few hours. Just like small everyday expenses, one purchase alone doesn't show, but several over a weekend can eat up this month and the next.
Make your list before you see the deals
If you show up without a list, the deal decides for you. With a list, you decide. Write down now what you really need or have been planning to buy, with today's price. That way, on sale day you'll know whether the discount is real or the “before” price was inflated.
A practical tip: take screenshots of current prices for the items on your list. It's the easiest way to check later whether they really dropped.
Three questions before you pay
Did you need it before you saw it on sale? If it wasn't on your list, it isn't a saving; it's a new expense, even with a discount.
Does it fit in what you have left? Check your number before paying: what you have left until your next payday, with upcoming bills already taken out. If it doesn't fit, it's not a deal for you this month. In Oslo you see it as soon as you open the app.
What if it's in installments? Buy now, pay later or 0% interest installments: each one adds to what's already due in the coming months. Make sure it also fits in January, when the new year's bills arrive. Check that there really is no interest or fee, and what happens if you miss a payment.
Set a cap for sale day
Decide how much you'll spend in total before you start, and log each purchase right after you make it. When you hit your cap, close the store's app. The most common mistake is thinking “while I'm here, I might as well” and adding small purchases that weren't on the list: that's where we ants show up.
If you're buying holiday gifts, include them in the same cap. That way you don't stack two spending seasons in two back-to-back months, and you reach January with a clear path.
And watch out for card purchases that feel invisible because they don't leave your account today: log them anyway, because they already have a due date.
Frequently asked questions
When is El Buen Fin 2026 in Mexico?
In Mexico, El Buen Fin 2026 runs from November 13 to 17, according to Expansión. It's five days of discounts in stores and online. To make the most of it without going into debt, make your list ahead of time, save current prices of what you plan to buy and set a total spending cap before it starts.
Are 0% interest installments a good idea on Black Friday?
Only if the payment fits in your budget every month, not just this one. Each installment purchase adds to what's already due, and several together can squeeze you in January. Check that there truly is no interest or fee and that you can pay on time, because a late payment can trigger charges.
How can I tell if a Black Friday deal is real?
Compare the sale price with the price before the season. If you took screenshots or wrote down prices a few weeks earlier, you'll know in seconds. Be wary of huge discounts on prices that went up just before, and ask yourself whether you'd buy it at the regular price. If the answer is no, you probably don't need it.
Sources (in Spanish)
This is financial education, not advice: Oslo doesn't recommend loans or investments. Decisions about your money are yours.
