Good Debt vs Bad Debt

Debt is a tool — some tools help, some hurt

The word "debt" has a negative connotation. Avoid all debt forever. Pay cash for everything. But this is an oversimplification that causes real financial harm. A homeowner with a 3% mortgage is often in a better financial position than someone who rented for 30 years. A student who borrowed $20,000 for a degree that pays $85,000/year made a productive investment. A person who financed a depreciating car at 24% interest made an expensive mistake.

The difference is not whether you borrowed — it is what you borrowed for, at what rate, and whether the asset increases or decreases in value.

What makes debt "good"?

Good debt has these characteristics:

Low interest rate: Usually below the expected return of investing (roughly 7% annually for stocks). At 3–5%, the cost of borrowing is low.
Funds an appreciating asset or income generator: Something that grows in value or produces income — a home, a business, a marketable education.
Creates a net positive over time: The economic benefit of what you bought exceeds the total cost of borrowing.

Examples of generally good debt:

Mortgage (homeownership): Historically, US home values increase over time. A fixed mortgage at 6–7% builds equity and eventually ends, while renting never stops. Note: location, purchase price relative to income, and down payment matter enormously.
Federal student loans for high-ROI degrees: A $30,000 loan for a nursing degree that starts at $65,000 is a strong economic trade. The same $30,000 for a program with low job placement and $30,000/year earnings potential is a much weaker case.
Business loans with positive expected ROI: Borrowing $5,000 to buy equipment for a business that generates $15,000 in additional revenue is productive leverage.

Leverage — using borrowed money productively

Leverage means using borrowed money to multiply your purchasing or investment power. A real estate investor who puts $50,000 down on a $250,000 property and borrows $200,000 controls a $250,000 asset with $50,000. If the property appreciates 5% ($12,500), the return on the $50,000 invested is 25%. This only works when the asset appreciates and the interest rate is manageable. The same logic in reverse explains why bad debt is destructive.

What makes debt "bad"?

Bad debt has these characteristics:

High interest rate: Credit cards at 20–30% APR are the clearest example
Funds a depreciating asset or consumption: Cars lose value the moment you drive them off the lot. Meals and clothes are consumed. Electronics depreciate rapidly.
Costs more than the value received: Paying $1,400 back on a $1,000 loan to buy a $1,000 TV that is worth $400 in two years is a bad economic trade.

Examples of generally bad debt:

Credit card balances carried month-to-month: 20–30% APR compounding on consumption
Payday loans: APRs often exceeding 300%. Designed to trap borrowers in renewal cycles.
Auto loans on expensive cars: A $35,000 car financed at 9% for 72 months costs $43,000 total and is worth $18,000 when paid off.
Buy Now Pay Later (BNPL) plans misused: 0% promotional rates that become 25–30% if not paid by the deadline, applied to items you did not need.

The interest rate is the key variable

The distinction between good and bad debt often comes down to the interest rate relative to the asset's return. A 6% mortgage on a home that historically appreciates 3–5% annually and builds equity is sustainable. A 24% credit card on groceries that is immediately consumed has no return — it only costs. The question is always: does this asset produce more value than the interest costs?

The grey areas

Many debts are neither clearly good nor clearly bad — they depend on context:

Car loan: Necessary transportation is often worth financing. A practical $12,000 car at 5% for 36 months is very different from a $45,000 luxury car at 9% for 72 months.
Student loans: The ROI depends on the field of study, the school cost, and actual job placement rates. Not all degrees are equally good debt.
Home equity loans: Using home equity to renovate (potentially adds value) is different from using it for a vacation.

The framework: before taking on any debt, calculate the total cost (interest + principal), assess whether the asset will be worth more or less than the total cost, and compare the interest rate to what you could earn investing the money instead.

Real-world example

Two friends each have $5,000 to invest in their futures. Alex uses it as a down payment toward a $25,000 used car with a 5-year loan at 6% — total interest paid: $3,900. The car is worth $8,000 when the loan is paid off. Net position: paid $28,900 for something worth $8,000. Necessary transportation, but expensive.

Jordan uses the same $5,000 as a down payment toward co-owning a food cart with a partner. They borrow $10,000 at 8% from a credit union for equipment. The cart generates $30,000 in the first year and pays back the loan in 14 months. Net position: $5,000 turned into a business interest worth significantly more. Same amount borrowed — entirely different outcome because one financed consumption and one financed production.

Which of the following best describes a characteristic of 'good debt'?

You carry a $600 credit card balance at 24% APR and make only minimum payments. Why is this considered bad debt?

A student borrows $80,000 to attend a private college for a degree in a field with average starting salaries of $32,000. How should we evaluate this debt?

What makes a payday loan particularly dangerous compared to other types of high-interest debt?

The framework to use before borrowing

Before taking any loan: calculate the total repayment cost (interest + principal), assess whether the asset creates more value than the total cost, check the interest rate against what you could earn investing the money instead, and ask whether you actually need what you are financing. This framework does not make all debt good — but it makes the decision conscious instead of impulsive.

Good debt funds assets that appreciate or produce income (mortgages, education with strong ROI, business loans) at manageable rates. Bad debt funds consumption or depreciating assets at high rates (credit cards, payday loans, expensive car loans). The key variable is interest rate relative to asset return. Before borrowing, calculate total repayment cost and ask whether the asset generates more value than its total financing cost.