Choosing your project

Ten common home projects sit behind this calculator, from a simple room repaint to a load-bearing wall. Each one already carries its own baseline profile before you answer a single question: how much skill it typically needs, how specialized the tools are, how physically demanding it is, and — critically — how expensive or dangerous a mistake tends to be. A crooked backsplash and a live wire are not the same kind of risk, and the calculator treats them differently from the start.

Answering honestly about yourself

Four questions adjust that baseline to your actual situation: your experience with this specific kind of work, the tools you already have versus what you’d need to buy or rent, how much real flexibility your timeline has, and what’s actually riding on the outcome. That last one matters more than people expect — the same tiling job is a different risk if you’re redoing a hallway for fun versus finishing a bathroom before a home inspection.

How the risk score is weighted

The five inputs don’t count equally. Stakes and experience carry the most weight, because a skilled person under low pressure can absorb a lot of tool or time gaps, while high stakes turn even small skill gaps into real risk. A permit requirement is treated as its own fixed factor — no amount of confidence changes whether the work legally needs an inspection.

Reading your Regret Risk gauge and breakdown

The gauge gives you one number from 0 to 100, but the bars underneath it show where that number actually came from. If your score is moderate but one bar is maxed out, that’s worth reading closely — a single weak factor, like stakes or tools, can be doing most of the work even when the overall score looks manageable. The “biggest advantage” and “biggest weak spot” callouts pull out the single strongest and weakest factor so you don’t have to compare five bars yourself.

The safety badge — when the math isn’t the whole story

For projects where a mistake carries real safety or structural consequences — electrical work, load-bearing changes — a separate badge appears regardless of your numeric score. That’s intentional. A moderate score for a wiring job still means real risk in a way a moderate score for a paint job doesn’t, and the dollar math below shouldn’t be the only thing deciding it.

The cost fork — what each path actually costs

Instead of one savings number, you get three: what you’d spend if the DIY attempt goes to plan, what you’d spend if you end up calling a professional partway through anyway (materials and tools already sunk, plus a pro finishing the job), and what a professional would charge from the start. The middle path includes an estimated probability based on your own risk score, so you can see whether the “savings” are worth the odds.

Your biggest lever, pitfalls, and before-you-start checklist

“What would change this the most” runs the numbers again for each answer moved one step in your favor, so you can see which single change — more time, borrowed tools, lower stakes, a bit of practice — would actually move the needle, instead of guessing. Below that, the pitfalls are specific to your chosen project, not generic DIY advice, and the checklist is assembled from whichever factors came back weakest in your case.