If you've got a credit card, a personal loan, a student loan, and a mortgage all going at once, they are not equally urgent. Treat them like a hospital waiting room: the one doing the most damage right now gets seen first, regardless of how big or small it is.
The rule: rate decides the order, not the balance
A $5,000 balance charging 23% is doing more damage to you every month than a $280,000 mortgage charging 5.5% โ even though the mortgage is fifty-six times larger. Interest is a percentage of what's owed, so the rate is what determines how fast a debt is actually getting worse, not the size of the number.
A typical example, ranked
| Debt | Typical rate | Pay off |
|---|---|---|
| Credit card | 23% | 1st |
| Personal loan | 11% | 2nd |
| Student loan | 6% | 3rd |
| Mortgage | 5.5% | 4th |
Why the mortgage almost always ends up last, beyond just the rate
Mortgages tend to have the lowest rate of the four to begin with, which is most of the reason. But there are structural reasons on top of that: mortgage interest is tax-deductible in some countries, it's secured against an asset that (historically) tends to appreciate rather than depreciate, and the whole loan is already priced and amortized for the long term. An unsecured debt at double the interest rate doesn't have any of that working in its favor.
The mortgage isn't the emergency. The debt with no plan behind it is.
The one thing that flips this order
A promotional 0% credit card rate about to expire, an unusually high private student loan rate, or a personal loan you refinanced down to almost nothing โ any of these can genuinely change where a debt belongs on this list. The rule isn't "credit cards are always first" โ it's "whichever rate is actually highest goes first." Check your real numbers rather than assuming the typical order applies.
Once you know your real rates, run them through the calculator below with your own balances โ it'll show you the actual payoff order and the real dollar difference it makes, rather than a rule of thumb.
Try the mechanism
Debt Snowball vs. Avalanche Calculator
Enter your own numbers and see the mechanism in action.
Open calculatorEducational information only. This article explains how a mechanism works. It isn't financial advice, a recommendation, or a plan tailored to your situation. Speak with a licensed professional before making any financial decision.