Skip to content

Good Debt vs Bad Debt

Student loans, mortgages, business loans vs BNPL: what debt really costs.

Play lesson 1 free

Student loans, mortgages and business loans versus BNPL and payday loans. Learn how to judge what a debt really costs you and when borrowing makes sense.

  1. 1

    What makes debt 'good'?

    Free●○○○○ difficulty

    Debt leans good when it buys something that grows in value or raises income, the repayments survive a bad month, and you know the total cost. Your one action: write the three questions in your phone notes for the next time you're offered credit.

  2. 2

    APR vs the total cost

    Free with a code●●○○○ difficulty

    APR compares loans; the total amount payable is what it really costs you. Longer terms lower the monthly payment but usually raise the total. Your one action: for any loan or finance quote, multiply the monthly payment by the number of months before you sign.

  3. 3

    Opportunity cost: the invisible price tag

    Free with a code●●○○○ difficulty

    Every monthly payment has an invisible price tag: what that money could have done instead. Your one action: pick one regular payment and write down what the same amount would build in a year if you saved it.

  4. 4

    Student loans: how they really work

    Free with a code●●○○○ difficulty

    In England, student loan repayments are a share of income above a threshold, not of what you owe, and the rest is written off after 30 or 40 years. Your one action: find your loan plan and threshold, then check the student loan line on your next payslip.

  5. 5

    Mortgages: the biggest debt most people take

    Free with a code●●●○○ difficulty

    A repayment mortgage clears the loan over time; interest-only doesn't. Deposit size sets your LTV, and fixed deals end, so payments can change. Your one action: if you ever get a quote, check the total amount payable and what the payment would be if rates rose by 2 points.

  6. 6

    Business loans: borrowing to earn

    Free with a code●●●○○ difficulty

    A business loan is good debt only if the asset's profit covers the repayments in bad months too, and you understand guarantees. Your one action: for any business idea, write the repayment next to the worst-month profit and see which is bigger.

  7. 7

    Consumer debt: still paying for the holiday

    Free with a code●●●○○ difficulty

    Consumer debt buys things that lose value, often at high rates, so you pay long after the fun's over. Your one action: for your next big want, set up a savings pot and save for it instead of financing it.

  8. 8

    BNPL: small bites, real debt

    Free with a code●●●○○ difficulty

    BNPL is debt, now regulated by the FCA, and plans stack up fast across apps. Your one action: list every BNPL plan you have, add up what leaves your account each month, and put the dates in your calendar.

  9. 9

    When good debt goes bad

    Free with a code●●●●○ difficulty

    Good debt goes bad when it's too big, the rate rises beyond what you can pay, or it funds the wrong thing. Your one action: for any debt you have, work out what the payment would be if the rate went up 2 points.

  10. 10

    Which debt first?

    Free with a code●●●●○ difficulty

    Pay priority debts first (home, council tax, energy, fines, child maintenance), then the highest rate debt, and get free advice early. Your one action: list your debts with their rates, mark the priority ones, and if it feels too much, contact StepChange or National Debtline.

  11. 👑

    BOSS: Dex's Leverage Lecture

    Free with a code●●●●● difficulty

    Leverage magnifies losses as well as gains; good debt is affordable, fully costed and funds something that earns or lasts. Your one action: for each debt you have, write what it bought, its APR and its total cost, and tackle the most expensive one first.

Good Debt vs Bad Debt: quick answers

Which question matters MOST before taking on any debt?

Will the monthly payment still fit if my income drops for a while?. That's the affordability test. Good debt that you can't repay in a bad month stops being good.

Good Debt vs Bad Debt: in-depth guides

Browse the whole money library or play the free money games.