I Was Taught All Debt Is Bad. Debt Bought My Homes and Built My Businesses.

Two things are true at the same time. The house I grew up in believed all debt was bad, and lived it, never borrowed a dime. And borrowed money bought my homes and fueled my businesses. The only way both can be true is that debt was never one thing. It's two different tools with one name, and nobody ever splits them.

So let me split it. Debt has no character of its own. A loan doesn't know what it bought. It's a multiplier, and it multiplies whatever it gets attached to. Attach it to something that earns, and it can speed up something that would have taken years longer with cash alone. Attach it to something that only costs you, and now you're paying interest for the privilege of going backward. Same tool, opposite results, and it multiplies mistakes at exactly the same speed it multiplies progress.

Two questions sort every loan, any size. What did it buy? The building kind bought something that can pay you or grow, a business, a property, the tools of your trade. The other kind bought something that only costs you from here forward. And could you carry it through a bad year? Income dips, a surprise bill lands, and the payment still gets made without pushing you into a corner. If both come back clean, the debt is working for you. If either one doesn't, it's working against you.

The card balance that rolls over every month fails both questions, which is why it's the famous one. And the loans that broke people in 2008 mostly failed the second, they only worked if nothing ever went wrong.

And this is where my parents turn out to be right. Their all-debt-is-bad rule was correct, for their world. In a paycheck world, the only borrowing that ever comes looking for you is the kind that costs, the store card, the payment plan, the loan on things that fade. The building kind tends to live on the ownership side of the line, and nobody we knew had ever stood there. Their rule wasn't wrong. It was local. The only problem was it traveled with me into a different world, where it would have walled off so much of what I've built.

You're holding a version of this right now. The car loan you're not sure about, the mortgage you're tempted to pay off early, the credit line your business would need to grow, or just the flat rule in your head that owing anybody anything is bad. Different lives give different answers, and I can't see yours from here. But the two questions travel. What did it buy, and could you carry it through a bad year. Run your version through them and most of the arguing in your head settles.

None of it makes borrowing harmless. The terms and the rate decide plenty, and every loan is a promise your future has to keep, in the good years and the bad ones. It just means the word your house handed you, whichever house that was, might be one word covering two tools. Mine was. The list of things like that, the money ideas nobody ever explained to me, runs long, and I'm working through it here, one letter at a time. This one's yours now. Two questions, any loan, and the word finally split in two.

Talk Tuesday.

— Mateo