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Every time you ship something you could not have built yourself, you take on competence debt. Here is what I found when I checked my own balance.
Competence debt is what you take on every time you ship something you could not have produced on your own. Not stolen, not cheated, just borrowed. The work is real, the result is fine, the customer is happy. But somewhere behind it is a skill you now depend on and do not actually own. I wrote about this idea last year, feeling reasonably pleased with myself. Then it occurred to me that I had never once run the test on my own work. So I did. I failed twice, and one of them stung.
A quick note. The client situations below are composites, blended and reshaped so that no individual, employer, or company is identifiable. The failures are mine and those are not composites at all.
The Test Is Embarrassingly Simple
One question. Take something you shipped in the last six months and ask: could I rebuild this from nothing, today, with the internet switched off and nobody to ask?
Not perfectly. Not fast. Just at all.
If yes, you own that skill. If no, you rented it, and you are still making payments whether or not you have noticed.
The bill never arrives while things are going well. That is not generosity. That is how debt works.
Where I Passed
I want to be fair to myself before I am unkind to myself, because otherwise nobody believes the unkind part.
I passed on the database work, and I passed comfortably. If you drop me into a slow system with nothing but a keyboard and a bad mood, I can still ask the four boring questions and find the door. That skill is genuinely mine. It cost me about fifteen years and a lot of nights I would rather not itemize.
I passed on writing, mostly. Plain sentences, cut the third adjective, read it out loud, delete whatever made me sound clever. Still mine.
So far so good. Then it got worse.
Where I Failed, Number One
Some of the small scripts and automations that now quietly run parts of my week, I could not write again from scratch. I asked for them. I read them. They looked right. They ran. I filed them under done and moved on with my life.
Last month one of them stopped working. I opened it up and had the specific, unpleasant experience of reading my own tooling like a tourist reading a menu in a language he claims to speak. I could tell you roughly what each part was for. I could not tell you why it was built that way, which meant I could not tell whether the way it was built was the problem.
It took me two hours to fix a thing I had allegedly made in ten minutes. Compound interest, right on schedule.
Where I Failed, Number Two, and This One Stung
The second one is worse because it is not a script. It is a habit.
I have started asking for the explanation before I have made a real attempt at understanding the thing myself. Not always. But often enough that when I caught it, I sat back in my chair for a minute.
Here is why that one hurts. The struggle was never a tax on learning. The struggle was the learning. That confused twenty minutes where you have the problem in your hands and no idea what to do with it, that is not wasted time before the lesson. That is the lesson, and I have been skipping straight past it to get the answer faster.
I did not lose a skill. I lost the appetite for the part that builds skills, which is considerably harder to get back.
Not All Debt Is the Same, and This Is the Part the Book Got Wrong
When I first wrote about competence debt I treated it as one thing to be avoided. That was too tidy, and life is not tidy. Some borrowing is completely sensible. Some of it will end you. The difference is not how much you borrowed. It is what you borrowed against.
The mortgage. You borrow on something you will never need to own personally and could not reasonably be expected to. I do not know how my car works. I have made peace with this. Nobody has ever called me at 2am about a transmission. Borrow all you like here, and sleep fine.
The car loan. Adjacent to your real work. You could learn it if you had to, and one day you might have to. Manageable, but keep an eye on the balance. Know roughly where the manual is.
The payday loan. You borrowed on the exact thing your job is about. This is the one that ruins people. The interest is invisible right up until the afternoon it is not, and then it takes everything at once.
My scripts were a car loan. Annoying, survivable, fixed in an afternoon. The habit of skipping the struggle is a payday loan against the only thing I actually sell, which is judgment, and I had been paying into it for months without opening a single statement.
The Friday Afternoon Test
Here is the sharper version of the test, and the one I now use.
Do not ask whether you could rebuild it. Ask what happens on a Friday at four o’clock when the tool is confidently, elegantly, completely wrong, and everyone in the room is already thinking about the weekend.
Can you tell? Not eventually. Right then, in the room, before somebody says ship it.
If you can, that is not debt. That is a tool in the hands of someone who owns the skill underneath it, which is the whole point and always was.
If you cannot, you are not using a tool. You are trusting a stranger who has never once been wrong out loud.
What This Looks Like in a Real Room
Let me show you the version I keep meeting.
A team asks for a query. It comes back looking sharp. They run it. Rows come out. The rows look plausible. Somebody says looks good and everyone moves on, and honestly, why would they not.
Nobody read the execution plan, which is only the server’s own honest note about how it intends to go and get your data. Nobody noticed it had decided to read the whole table over and over, because on a test set that costs nothing and on Monday morning it costs the checkout page.
That team did not lack intelligence. They were sharp people having a normal day. They lacked one person who could look at a plausible answer and feel a small, specific itch. And that itch is not a personality trait. It is built, slowly, by having been fooled before.
The query ran, the numbers looked fine, and not one person in that room could read the plan. That is the whole essay in a single sentence.
Paying It Down Without Becoming Insufferable
I am not suggesting you refuse help and hand write everything like a monk. That is not discipline, that is theater, and it is also just slower.
Four things I actually do now.
Attempt before asking, but set a timer. Fifteen minutes. That is all. Long enough for the useful confusion, short enough that nothing gets dramatic. Then ask, and notice which parts of the answer surprise you. That surprise is the receipt for what you did not know.
The explain out loud rule. Before you ship it, explain it to someone with less experience than you, in your own words, without reading off the screen. You will discover the boundary of your understanding in about forty seconds. It is bracing.
Pick your payday loan and pay it first. You cannot fix everything. Name the one skill your career actually rests on and refuse to borrow against that one. Everything else can go on the card.
Keep the wrong list. One line every time the tool was confidently wrong: what it said, what was true, how you caught it. In a month you have a personal map of where it lies to you specifically, in your field. Nobody can write that for you, which is exactly what makes it worth having.
The Honest Ending
I am not paid up. I am maybe two months into the audit and the balance is still ugly, and I expect to fail this test again next year in some new and creative way.
But there is something genuinely useful about knowing the number. Debt you can see is a plan. Debt you cannot see is just a surprise waiting for the worst possible afternoon to introduce itself.
So run the test on yourself this week. Pick one thing you shipped, ask whether you could rebuild it, and be honest in the way you would want your surgeon to be honest.
Competence Debt is one of the thirty essays in my book AI: Nobody’s in There. But we’re still in here. The version in the book was tidier than this one, and I now think this one is truer. Every essay is free to read at pinaldave.com, and there is a paperback on Amazon if you would rather hold something real in your hands.
You are allowed to use every tool on the shelf. Just know which ones you are leaning on, and how hard, and what happens the day one of them is not there.
Competence debt never sends you a statement. It just quietly repossesses your judgment on the worst possible afternoon.
Reference: Pinal Dave (https://blog.sqlauthority.com/), X
First appeared on Competence Debt: I Ran the Test on Myself
