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What is the difference between “good debt” vs. “bad debt”?
The word "good" was used in contrast to "bad" but these words are misused here.  There are three kinds of debt: Debt for spending. Never go into debt to buy consumables, go out for a good time, for vacations, or other purchases with no lasting financial value. Debt for depreciating assets, such as cars and sometimes things like furniture. There are those who put this in the same category as the first, but I know many people who can budget a car payment and pay it off during the life of the car. In a sense, they are renting their car and paying interest while doing so. Debt for appreciating, money-making assets. Mortgage and student loans are both often put into the good category. The house is the one purchase that, in theory, provides an immediate return. You know what it saves you on the rent. You know what it costs you, after tax. If someone pays 20% of their income toward their fixed rate mortgage, and they'd otherwise be paying 25% to rent, and long term the house will keep up with inflation, it's not bad in the sense that they need to aggressively get rid of it. Student loans are riskier in that the return is not at all guaranteed. I think that one has to be careful not to graduate with such a loan burden that they start their life under a black cloud. Paying 10% of your income for 10 years is pretty crazy, but some are in that position. Finally, some people consider all debt as bad debt, live beneath their means to be debt free as soon as they can, and avoid borrowing money.