The urencriterium: 1.225 hours, explained
The hours gate behind the zelfstandigenaftrek and startersaftrek, and what actually counts.
Almost every income-tax break that matters for a ZZP'er turns on one number first: the . Hit 1.225 hours in the calendar year and the door to the big deductions opens. Miss it, and those deductions stay shut even if the business is real.
That door leads to the and, in your early years, the . The hours test is the shared gate; the rest of the return only gets interesting after you clear it.
Start in July and the bar is still 1.225 hours for that calendar year. The Belastingdienst does not scale the threshold down for a mid-year start, so a late launch means a denser hours plan, not a smaller target.
What hours actually count
Billable delivery counts, and so does the work that never appears on an invoice: quoting, acquisition, bookkeeping, invoicing, chasing payment, building the site, and travel between clients. What does not count is time that is really leisure, study for its own sake, or a hobby the inspector could not fairly call business.
A weekly log is not a legal form you must file, but you do need to make the hours plausible if asked. A simple running note beats a confident reconstruction in April. Kwartaal can hold the log for you; the defence is still yours.
The more-than-half rule
On top of 1.225 hours, most people also need to spend more time on the business than on anything else, including a salary job. Early on, the starters' exception can waive that second test for a few years. Read the startersaftrek guide for the booster that sits on top of the hours, and the zelfstandigenaftrek guidefor what the deduction itself is worth once you clear the gate. A reduced hours test for disability exists too; that path is outside this guide.