Black Friday: how to tell if a deal is real

Reprograme · Published on September 30, 2026 · Updated on September 30, 2026

Educational content, with data consulted on September 30, 2026. This is not financial advice.

Black Friday on November 27, 2026 may be a good date to find a lower price. The word “discount”, however, does not tell you the previous price, the total to pay or whether the product meets your needs. To decide whether a promotion is real, separate three questions: has the final price fallen against a reliable reference? Are the terms clear? Does the purchase fit the decision you were already trying to make?

In Brazil, the Consumer Protection Code requires correct, clear and precise information about features, price and risks in an offer; misleading advertising is prohibited [1]. This protects buyers, but does not turn every eye-catching percentage into a useful comparison. A label may compare against a high figure that was never relevant to you. Before the campaign, record the price of a specific model, its capacity, the store and the terms. Compare the same combination when the offer arrives.

The percentage depends on its reference price

Consider a hypothetical Brazilian example. An item cost R$1,200 when you started tracking it. Near the campaign, the label changed to R$1,600. On Black Friday, the offer appears at R$1,190. Against R$1,600, the advertised reduction would be approximately 25.6%. Against the R$1,200 price you recorded, it is about 0.8%. The second comparison better describes the saving you observed; neither number alone proves fraud.

The European Union established a specific rule for price-reduction announcements: Directive 98/6/EC, as amended by Directive (EU) 2019/2161, defines the “prior price” as the lowest price the trader applied over a period of at least 30 days before the reduction, subject to exceptions in the text [2]. This is a European rule, not a Brazilian rule. It is useful here as an example of why a discount's reference matters. In Brazil, consult the Consumer Protection Code and consumer protection bodies to assess a particular offer.

The final price is more than the label

Shipping, fees, delivery and payment method can change the conclusion. A price of R$1,190 with R$80 shipping comes to R$1,270; an option at R$1,220 including delivery would be cheaper if the other terms were equivalent. These amounts are examples, not prices collected from the market. Senacon's Black Friday guidance is to examine the total amount and purchase conditions, including delivery costs [3].

Also check whether the page has changed the product version. Lower capacity, a different warranty or a distant delivery date changes the comparison. Keep the offer page, advertisement and order confirmation if there is doubt about what was promised. Procon Fortaleza recommends researching price changes and considering shipping when comparing offers [4]. Your own history, even a short one, helps identify differences without relying solely on the highlighted figure.

The purchase still needs to make sense

Even a genuine reduction can be a poor purchase for your circumstances. An unplanned item may cost less than yesterday and still use money reserved for something else. Ask what it would solve, when you would use it and which expense would have to leave the budget. The campaign's urgency may call for a quick decision; it creates no additional income and removes no future expenses. If the purchase was planned and the final price fell, the promotion may be useful. If the need arose only when you saw the countdown, a pause may help.

To put the cost in perspective, imagine net monthly income of R$4,400 in Brazil. Using Reprograme's reference of 220 hours per month, an hour is equivalent to R$20. The R$1,190 offer corresponds to 59.5 hours: 1,190 ÷ (4,400 ÷ 220). With R$80 shipping, the R$1,270 total corresponds to 63.5 hours. This measure does not tell you whether to buy; it shows the difference between looking only at the percentage and looking at the total cost.

A short checklist for an offer

1. Decide beforehand which product and configuration meet the need. Record prices checked and dates, including outside the campaign week.
2. In the offer, confirm model, seller, stock, timing, warranty, upfront price, installment price and delivery cost. Add up the total to be paid.
3. Compare the total with your record, not just the crossed-out price. A percentage without a verifiable reference is incomplete information for your decision.
4. Compare the total with your budget and other priorities. If you decide to buy, keep the advertised terms and receipt.

You do not have to prove every promotion “fake” to decline a purchase. It may simply not be the best option today. Nor is there reason to distrust every reduction: some are real and meet an already identified need. A comparable reference, a check of the total and knowing why the item entered your plan protect your decision. If you want to translate the price into hours before deciding, calculate with your own figures in Reprograme.