Quick answer: The debt snowball pays off your smallest debt first. The debt avalanche pays off the debt with the highest interest rate first. Avalanche saves a little money on paper. Snowball gives you quick wins that keep you going. Pick the one you'll actually finish. For most people, that's snowball.
If you've read anything about paying off debt, you've seen this fight. Two methods. One argument that never ends.
What is the debt avalanche?
Pay the smallest amount you're allowed to on every debt. Then throw every extra dollar at the debt with the highest interest rate. Interest is the extra money you pay for borrowing. The higher the rate, the more it costs you to owe that money.
On paper, this is the smart way. You pay the least interest possible.
What is the debt snowball?
Pay the smallest amount you're allowed to on every debt. Then throw every extra dollar at the debt with the smallest balance. When it's gone, roll that payment into the next smallest debt. It grows like a snowball rolling downhill.
On paper, this costs a little more in interest.
The internet is very sure that avalanche is the right answer. The internet is also full of people who have been "about to start" avalanche for three years.
Why does the snowball work better for most people?
The avalanche math has a hidden assumption: that you'll keep going. That's the whole thing. Saving interest only matters if you make it to the end.
Most people don't quit paying off debt because of interest. They quit because it feels like nothing is happening. You send a big payment to a big balance and the number barely moves. Do that for six months with no win to show for it, and your brain decides this isn't working.
The snowball fixes that by giving you wins early. You kill a small balance in month two. Another one in month five. Each one is an account you never think about again. Each one's payment rolls into the next attack. It's slower on paper and faster in real life, because real life includes the months you didn't quit.
Which one did I pick?
I ran my own numbers both ways. The difference in total interest was real but not huge. The difference in when my first debt would die was months.
I chose the snowball. Not because I don't get the math. Because I've watched myself give up on plans before. The plan you finish beats the plan that's perfect.
One exception: if one debt has a rate way higher than the rest, like a credit card at 29%, hit that one first no matter its size. Then go back to the snowball. Don't let a 29% card sit there while you pay off a small 4% loan.
How do I compare snowball and avalanche with my own debts?
I built a free sheet that does it in about a minute. Enter up to eight debts: the name, how much you owe, the interest rate, and the smallest payment allowed. Type one word to switch between snowball and avalanche. It shows you:
- The order you'll pay them off
- The month each one dies
- Your debt-free date
- Total interest paid, so you can see what the snowball really costs you
It's on the resources page. Free, no sign-up. Every extra dollar from selling my stuff goes into the "extra payment" cell, and the debt-free date moves closer. Watching that date move is the most motivating thing I've found.
Not sure how much extra you can pay each month? The 5-minute budget tells you.
So which should you choose?
Pick the one you'll finish. If that's avalanche, great, you'll save some interest. If it's snowball, great, you'll be done. The worst choice is spending another month deciding.
Frequently asked questions
Which is better, debt snowball or debt avalanche?
Avalanche saves the most interest. Snowball gives you quick wins that keep you motivated. Studies and real life both show that most people finish the snowball more often. Pick the one you'll stick with.
How much more does the debt snowball cost?
Usually less than people expect. For most mixes of debt, the difference is a few hundred dollars over the whole payoff. If one debt has a very high rate, pay that one first, then switch to snowball.
What is the first step in the debt snowball?
List every debt from smallest balance to largest. Pay the minimum on all of them. Send every extra dollar to the smallest one until it's gone. Then move to the next.
