Time tracking for tradespeople: why remembering is costing you money

You bill from memory, and memory rounds down. Here's what undocumented hours really cost you, and the 30-second fix.

Ask a self-employed tradesperson how long a job took and you'll get an estimate. The problem is, that estimate is almost always lower than the truth — and you're the one eating the difference.

Memory rounds down

When you bill at the end of the week, you remember the big jobs. The 20 minutes you spent buying materials, the half-hour of cleanup, the phone call with the customer — those vanish. If your rate is €60/hour and you lose 45 minutes of billable time per day, that's €45 a day, over €1,000 a month, gone without a line item.

Customers trust records, not recollections

A detailed log — hours, what was done, photos — turns a vague invoice into a document the customer can't argue with. It also protects you when a customer disputes a bill or when a warranty claim lands months later and you need to prove exactly what you did and when.

The fix is 30 seconds, not a spreadsheet

When you arrive, start a timer. When you leave, stop it. Log hours per job as they happen, snap a photo at each work step, and add a one-line note. That's it. At the end of the job, the report writes itself.

What to log on every job

• Hours (start/stop, not "about half a day")
• Customer and address
• What was done, step by step
• Photos — before/after, plus anything that documents condition
• Materials used

You don't need to become a bookkeeper. You need the habit of capturing the moment, not reconstructing it. The difference shows up in your bank account by the end of the month.

Bilal Shadid

Founder of The One Hand — builds privacy-first tools for solo businesses, freelancers, and tradespeople.