Good Debt vs Bad Debt: A Simpler Way to Think About It
There is no type of debt that is always “good” or always “bad”. A better test is three questions: what does it cost each month, how long will it last, and does the payment fit your budget?
This is not a new idea. A toolkit from the US consumer regulator, the CFPB, says there is no one type of debt that is “good” or “bad”.
What do people mean by good debt and bad debt?
Debt is money you have borrowed and must pay back.
People often call a debt “good” when it pays for something that may help later, like study or a car to get to work. They call it “bad” when it has high interest or pays for things that are soon gone.
The labels are quick, but they can mislead. The CFPB toolkit says even debt many people think of as good should be approached with caution. A student loan for a degree you never finish, for example, can set you back.
And a “bad” debt is not always a disaster. The same toolkit says a credit card or short-term loan can cover a gap in your cash flow, if you have a way to repay it.
What should you ask instead?
Three questions tell you more than any label.
- What does it cost each month? This is the interest, plus any fees.
- How long will it last? A longer debt usually means more interest in total.
- Does the payment fit your budget? Can you pay it every month and still cover your bills?
Moneysmart, run by the Australian Government, puts the last one simply: if you borrow, make sure you can afford the repayments, plus any interest and fees.
How do you compare the cost of two debts?
The quickest way is to work out what €1,000 of each debt costs you.
Here is the method in words: yearly interest is the amount owed times the yearly rate. Divide by 12 to get a rough monthly cost.
This is a simple estimate. It ignores payments and assumes the balance stays at €1,000.
| Yearly rate | Yearly interest on €1,000 | Monthly (about) |
|---|---|---|
| 0% plan (example) | €0 | €0 |
| 3% | €30 | €3 |
| 6.5% | €65 | €5 |
| 19.9% | €199 | €17 |
Step by step, for 19.9%: 1,000 × 0.199 = €199 a year. Then 199 ÷ 12 = about €17 a month.
The same €1,000 can cost €0 or €199 a year. That gap matters more than whether someone calls it good or bad.
A 0% plan can still have fees, as Moneysmart notes for buy now, pay later. (See what 0% for 12 months really means.) And the yearly rate you are quoted may include fees or not. (See APR explained.)
Why does how long it lasts matter?
Time turns a small monthly cost into a big total.
Take €1,000 at 19.9% again. If you clear it in 12 equal payments:
- Payment: about €93 a month.
- Total interest: about €111.
Clear it in 36 payments instead:
- Payment: about €37 a month.
- Total interest: about €336.
The lower payment feels easier. But it costs three times as much interest.
The CFPB toolkit makes the same point in its loan examples. A longer term can lower the monthly payment, but you may pay more interest over the life of the loan.
To work out a payment yourself, use this in words: payment equals the amount owed times the monthly rate, divided by one minus (one plus the monthly rate) raised to the power of minus the number of months.
How do you know if a debt fits your budget?
Look at how much of your monthly income goes to debt payments.
Say you take home €2,000 a month and your debt payments add up to €300. That is 300 ÷ 2,000 = 15% of your income.
The CFPB toolkit calls this kind of measure the debt-to-income ratio. It says the higher the percentage, the less financially secure you may be. It also gives example ranges, but says they are not rules.
There is a simpler sign too. The toolkit says that if you are worried about your debt, you likely have too much.
Moneysmart adds one more point: your situation may change. Your rent might go up, or you could have to pay to get your car fixed.
Do this today (10 minutes)
- List each debt with its yearly rate and balance.
- For each one, work out the monthly cost: balance × yearly rate ÷ 12.
- Add up all your monthly payments and divide by your monthly income.
Nada does this maths for you. Add your debts and see what each one costs you each month. Get Nada
Once you know your total, see the one number that matters.
FAQ
Is a student loan or car loan always good debt? Not always. A CFPB toolkit says even debt many people call good should be approached with caution. A student loan for a degree you don’t finish can set you back. Judge any loan by its cost, how long it lasts, and whether the payment fits your budget.
Is credit card debt always bad debt? No single type of debt is always bad. A card can cover a short gap if you have a clear way to repay it soon. The trouble is the cost. At 19.9% a year, €1,000 costs about €17 a month in interest, and it keeps going until you pay it off.
How much debt is too much? One check is the share of your monthly income that goes to debt payments. A CFPB toolkit says the higher this share, the less financially secure you may be, and that its ranges are guides, not rules. It also says that if you’re worried about your debt, you likely have too much.
Should I pay off my cheapest debt or my most expensive debt first? Always pay every minimum first. Then, if you want to pay the least interest overall, put extra money on the debt with the highest rate. If you want quick wins, start with the smallest balance. Both methods work. Our snowball vs avalanche post shows the numbers side by side.
Sources
Read in October 2026.
- CFPB: Your Money, Your Goals – Dealing with debt (2014)
- Moneysmart (Australian Government): Credit and debt
Written by the Nada team. Reviewed October 2026.
This is general information, not personal advice.