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by matheusmoreira 315 days ago
> But for instance I'm getting some good deals where is better to get a discount on the nominal price than getting the cashback and so on.

Getting a discounted cash price is almost always the better option. They always offer "installments, zero interest" deals which make no economic sense.

If they don't offer a discount, the best option is to max out the zero interest installments on the credit card. Interest rates are 15% per year right now, if they don't offer at least 15% discount it's better to pay in 12 installments and invest the money.