"Every 4 to 6 weeks" gets repeated so often it sounds like a rule. It isn't — it's an average across every haircut style, and it's nearly useless for figuring out what your specific cut actually needs.
It depends entirely on what you're maintaining
A haircut needs a redo when whatever makes it that specific style stops being visible. For a fade, that's a sharp line between short and long — and that line is exactly the part that grows out fastest, since it's built from the shortest hair on your head meeting the longest. For a buzz cut, there's no line to maintain at all, just overall length creeping up evenly. Those two cuts age completely differently, which is why one frequency can't cover both.
Realistic timelines by cut type
Fades and tapers: every 2 to 3 weeks. The blend line softens fast because it's built from the shortest guard on your head, which is the first length to show new growth.
Buzz cuts and crew cuts: every 3 to 4 weeks. More forgiving because there's no precise line, just an even length getting gradually longer.
Longer, textured cuts — French crops, curly styles, mullets: 6 to 8 weeks or longer. These are built around overall shape and texture rather than a sharp edge, so a bit of extra length actually reads as intentional rather than unkempt.
The real answer once you're cutting your own hair
This is where doing it yourself actually changes the math. Once you can maintain your own fade, "how often" stops being a scheduling question and becomes a "does it look soft yet" question. Most people touch up just the fade line weekly — a five-minute job, not a full session — and do a complete cut every few weeks when the top length needs attention too. You're not booking an appointment around your calendar; you're fixing what actually needs fixing, when it needs it.
Quick answers
Is cutting too often bad for your hair? No — hair doesn't get "damaged" by frequent length trims the way it can from heat or chemical treatments. The only real cost is your time.
How do I know when it's time, without counting weeks? Check the fade line in good light. Once you can't find a clean edge — it's all started to blend into one soft gradient — that's your sign, whether that's day 12 or day 20.
Should beginners cut more or less often at first? Slightly more often, in smaller increments, while you're still building technique. A quick touch-up every week or so keeps mistakes small and gives you way more practice reps than one big monthly cut.