What Is Good Debt vs Bad Debt? A Guide for Teenagers
Not all debt works the same way, and understanding the difference is one of the most useful financial skills you can develop as a teenager. Good debt is borrowing that builds your net worth or increases your earning potential over time, while bad debt is borrowing that funds consumption, carries high interest, and leaves you poorer than before. The most common examples of good debt are student loans and mortgages. The most common examples of bad debt are credit card balances, Buy Now Pay Later (BNPL) services, and payday loans. This article explains how to tell them apart, why the distinction matters for teens specifically, and how to decide whether any debt is worth taking on.
What Is Good Debt?
Good debt is borrowing that is likely to increase your net worth or income over time, typically at a relatively low interest rate. The defining feature of good debt is that the thing you are borrowing for is worth more than the cost of borrowing itself. A student loan at 5 to 7 percent interest that helps you earn a credential leading to a $60,000 salary is a good use of debt. A mortgage that lets you build equity in a home over 25 years, while your property appreciates in value, is another classic example.
The key questions for any potentially good debt are: Does this borrowing build something that will be worth more in the future? Is the interest rate low enough that the return outweighs the cost? And can you realistically manage the payments without destabilizing your finances? If the answer to all three is yes, the debt may genuinely work in your favour.
What Is Bad Debt?
Bad debt is borrowing to fund consumption or depreciating purchases, usually at high interest rates. Bad debt costs you more than the thing you bought is worth by the time you finish paying for it. A $500 pair of sneakers charged to a credit card at 19.99 percent interest and paid off over 12 months costs you roughly $550 by the time you clear the balance. The sneakers are worth half that or less by then. You paid extra for something that lost value while you were paying for it.
Bad debt also tends to compound quickly. Missing a minimum payment on a credit card triggers penalty fees and a higher interest rate. Payday loans in Canada are capped at $15 per $100 borrowed in most provinces, which sounds small until you calculate the annualized rate: that works out to approximately 390 percent APR. A single $300 payday loan rolled over twice can easily become a $400 or $500 obligation within weeks.
Examples of Good Debt for Teenagers
The most relevant examples of good debt for teens are student loans and, eventually, mortgages and business loans. Each has a clear return on the investment that can exceed the cost of borrowing.
Student loans. In Canada, federal student loans through the National Student Loans Service Centre (NSLSC) carry a prime-based interest rate and come with repayment assistance programs if your income falls below a certain threshold after graduation. Provincial programs like OSAP in Ontario add grants on top of loans, reducing the total amount you need to repay. In the US, federal student loans for undergraduates are fixed at around 6 to 7 percent for the 2025-2026 academic year. Borrowing to earn a credential that raises your lifetime income is the most straightforward case for good debt, as long as you borrow only what you need and choose a program with realistic employment outcomes.
Mortgages. A mortgage is typically the largest debt a person takes on, and also one of the most financially sound. You are borrowing to purchase an asset that historically appreciates over time, and each monthly payment builds equity you own. While buying a home is a long way off for most teenagers, understanding how mortgages work, and why they sit at the good debt end of the spectrum, is foundational financial knowledge. The current Canadian mortgage rates give useful context for how the math works across different borrowing amounts.
Business loans. Borrowing to start or grow a business can be good debt if the business generates more than the cost of the loan. For teens interested in entrepreneurship, small business loans from institutions like the Futurpreneur Canada program (which supports entrepreneurs aged 18 to 39 with financing and mentorship) can make a genuine investment case. The risk is higher than with a mortgage or student loan, since business revenue is not guaranteed, but the principle is the same: debt used to build something that produces returns.
Examples of Bad Debt Teens Should Avoid
The bad debt examples most relevant to teens right now are credit card balances, Buy Now Pay Later services, and payday loans. Car loans sit in a grey zone that is worth understanding separately.
Credit card balances. A credit card used well (paid in full each month) is a tool for building credit history and earning rewards. A credit card with a revolving balance is one of the most expensive forms of debt available to consumers. Most Canadian credit cards charge between 19.99 and 22.99 percent interest on unpaid balances. A $1,000 balance paid off at the minimum payment over time will cost you well over $1,300 by the time it is cleared. Using a credit card for everyday purchases is fine. Carrying a balance is not. For more on using credit cards responsibly as a teen, the TeenLearner credit card guide covers the basics.
Buy Now Pay Later (BNPL). Services like Afterpay, Klarna, and Affirm let you split purchases into installments, often with no interest if paid on time. The problem is the structure: they are designed to make spending feel smaller than it is, and missing a payment triggers fees or interest that can be steep. A 2025 report from the Financial Consumer Agency of Canada found that BNPL use among younger Canadians has grown sharply, with many users making multiple simultaneous purchases without fully tracking total obligations. For teens without strong income, BNPL debt can accumulate quickly across several services at once. Treat it like a credit card: only use it if you have the cash to pay it off immediately, not as a substitute for savings.
Payday loans. Payday loans are short-term, high-fee loans designed to bridge the gap until your next paycheck. In Canada, the maximum fee is $15 per $100 borrowed in most provinces, which translates to approximately 390 percent APR. Borrowers frequently need a second loan to repay the first, creating a debt cycle that is difficult to exit. Payday loans are one of the few financial products with essentially no good use case for anyone. If you are short on cash, exhausting every other option first (family support, employer advances, provincial assistance programs, credit unions) is better than a payday loan.
Car loans for new vehicles. Car loans occupy a grey zone. A car is often a practical necessity, and not everyone can save the full purchase price. But a loan on a new vehicle is financially disadvantageous because the car depreciates sharply the moment you drive it off the lot, losing roughly 20 percent of its value in the first year. If you need to finance a vehicle, a used car with a modest loan at a credit union rate is significantly better than a new car loan through a dealership’s financing arm. The goal is to minimize what you borrow and prioritize paying it off quickly.
5 Questions to Ask Before Taking On Any Debt
Before taking on any debt, ask these five questions to evaluate whether it is genuinely worth it: Will this debt increase my income or net worth? What is the total cost of borrowing, including interest and fees? Can I afford the monthly payments on my current income? What happens if my income drops or I cannot make a payment? Is there a realistic plan to pay this off within a reasonable timeframe?
If you cannot clearly answer the first question with a yes, the debt is almost certainly in the bad category. The cost of borrowing question is often the one people skip: the sticker price of an item looks different when you add 20 percent interest compounded over 18 months. Running the actual numbers (not just the monthly payment) before committing is one of the most important financial habits you can build early.
Frequently Asked Questions (FAQ)
What is the difference between good debt and bad debt?
Good debt builds your net worth or earning potential over time, typically at a low interest rate: examples include student loans and mortgages. Bad debt funds consumption or depreciating purchases at high interest rates, leaving you poorer once it is paid off: examples include credit card balances, BNPL services, and payday loans.
Are student loans good debt or bad debt?
Student loans are generally considered good debt because they fund education that increases your earning potential, and they carry relatively low interest rates compared to credit cards or payday loans. In Canada, federal student loans through the NSLSC come with repayment assistance options if income falls below a threshold after graduation. The key is borrowing only what you need and choosing a program with clear employment outcomes.
Is Buy Now Pay Later bad debt?
Buy Now Pay Later can become bad debt quickly if you miss payments or carry balances across multiple services simultaneously. The installment structure makes spending feel smaller than it is, and fees or interest on late payments add up fast. BNPL is best treated exactly like a credit card: only use it if you have the cash to pay it off right away, not as a way to afford things you cannot currently pay for.
How much debt is too much for a teenager?
As a general rule, your total monthly debt payments should not exceed 15 to 20 percent of your monthly take-home income. For most teens earning part-time wages, that is a very small number, which is exactly why taking on high-interest debt early is so dangerous. A single credit card balance or BNPL obligation can consume most of your available margin at that income level. The safest position for most teens is no debt at all outside of a student loan that starts after high school.
Last updated: May 2026
Robert Puharich is the founder of TeenLearner, where he helps teens build real-world skills in money, AI, and life. With over 20 years in education and a Master of Education (M.Ed.) from UBC, he created TeenLearner to teach practical skills such as budgeting, career readiness, decision-making, and the wise use of technology. Robert is also a published author and business founder.
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