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Which way is the “best” way to pay off debt?



As discussed in my last post, you can find all sorts of information about what order you should go in. Many people swear by paying off the highest interest rate first, and others say smallest balance first.

Before we dive into which one is best, let’s take a moment with a few questions:

1. True/False: Paying extra on loan payments results in paying off loans faster?
2. True/False: Paying extra on loan payments results in paying less in interest overall?
3. True/False: Paying extra on loan payments is “worth it”?

The answers for #1 and #2 are both true. The answer for #3 is I HAVE ABSOLUTELY NO IDEA! And neither does anyone else. It is different for everyone.

What does “worth it” or “best” mean to you? Do those terms mean saving the most interest? Or do they mean paying off debt in the shortest amount of time?

Getting back to the order, there’s actually 6 ways you could prioritize debt.

1. Highest rate
2. Smallest balance
3. Largest balance
4. Smallest monthly payment
5. Largest monthly payment
6. Fewest payments remaining

And in my experience, one method typically leads to the least amount of interest paid, but a different method results in the shortest payoff time.  This is still using the debt stacking method I wrote about last week.

In one case, a couple with over $110k in debt between credit cards, car loans, and a home equity loan, their results were as follows:


Best Method
2nd Best Method

Lowest Interest Paid

Lowest # of Pmts

Largest Balance


Shortest Payoff Time


Highest Rate

Largest Monthly Pmt

On the other hand, another couple with a similar amount of debt, though mostly in student loans and only some credit cards, the results were quite different:


Best Method
2nd Best Method

Lowest Interest Paid

Highest Rate

Smallest Mo Pmt


Shortest Payoff Time

Lowest # of Pmts

Highest Rate


What is true is that in both cases, the “cost” to go with the 2nd best method instead of the first was very small. Either it only led to a small amount of extra interest or time, but clearly, the “highest rate” or “smallest balance” aren’t always the best answers.

Another interesting point about this: by adjusting how much you pay, it doesn’t affect the interest paid or payoff time that much. Conversely, when you take away that extra money, you don’t lose that much time.

For that first couple, taking away all of the extra payments ($350/mo - meaning they were only paying the minimum on all of their debt), that only added less than 2 years of time and about $6k in extra interest (on over $100k in debt).

For the second couple, cutting their extra payments in half (from $500 to $250/mo) meant less than 1 year of time and $3k in interest cost.

Think about this. You can cut your monthly payments on your debt and not cost that much. What would you have to give up in your lifestyle to free up the same amount of money each month?

If you have debt, what is your optimal order? And if you’re making extra payments, how much are you really saving in time and money?

By the way, being debt free doesn't really mean being debt free. But that's a later post...