Credit cards, installment plans and short-term loans make consumption smoother, but they also change the timing of household income. A purchase made today becomes a payment obligation in the future.
Consumers often focus on the monthly payment rather than the total cost. That can make expensive borrowing appear manageable until several obligations accumulate. Lenders, meanwhile, price loans according to risk, competition and expected repayment.
Financial literacy is therefore not simply about avoiding debt. It is about understanding compounding, fees, interest rates and opportunity costs. Credit can be useful when its cost is understood and the financed activity produces durable value.