How Often Should You Get a Haircut?
Pictured above: styled before she came in, and still dry. Hair like this needs a cut, not more product. In my experience, this is often what overuse of hot tools looks like.
Two different things stop hair from getting longer, and they look identical in the mirror. One of them a haircut fixes. The other one it cannot, and knowing which you are looking at saves you a year of trimming for nothing.
My answer on frequency is every four to eight weeks, and in this climate eight is already the outside edge. But the more useful question is the one people are really asking when they ask it: why has my hair sat at the same length for a year, and why does it seem to start falling out once it gets there?
The short version
- Cutting does not make hair grow. Growth happens at the follicle, and the end of the strand has no way to signal it.
- There are two reasons hair stops gaining length. Your ends are breaking off as fast as you grow, or you have reached your terminal length.
- Breakage is fixable with regular cuts. Terminal length is not, and no trim, product or routine extends it.
- Every four to eight weeks. Short, defined shapes at the near end, long hair at the far end. Eight weeks is the outside edge, not a target.
- Growing it out means more trims, not fewer. That is the part almost everybody has backwards.
Why does my hair stop growing at a certain length?
Because one of two things is happening, and they need opposite responses.
One: your hair is not stopping, it is running in place
Your hair grows from the root at a steady rate the whole time. Meanwhile the oldest part of it, the ends, is out in the world being brushed, tied up, heat styled, and here in Colorado dried out and re-wetted by air that will not hold still. Ends split. Splits travel up the strand and break off.
Past a certain length those two things reach a balance. You gain hair at the top at roughly the rate you lose it at the bottom, so the length stops moving and it reads as your hair having stopped growing. It has not. It stopped holding.
This is the one a haircut fixes, and it is the more common of the two.
Two: you have reached your terminal length
Every hair on your head is on a clock. It grows for a period of years, then the follicle winds that hair down, releases it, and starts a new one. How long that growing phase lasts is set inside the follicle, by cells that can only divide so many times, and it is different from person to person. Published ranges run from about two years to several, depending on the source, which is a wider spread than most people expect.
Your growth rate multiplied by that growing phase is the longest a hair of yours can get before it is shed. Dermatology puts it plainly: the maximum attainable hair length depends on how long the growing phase lasts (Wolff, Fischer and Blume-Peytavi, Deutsches Ärzteblatt International, 2016). That is why one person cannot get past their shoulders and someone else reaches their waist on exactly the same routine, the same products and the same stylist. It is not effort. It is the clock they were issued.
So the thing you have noticed is real. Hair does reach a length and then start letting go, because those hairs have finished their run. What it is not is a response to weight, and this is the part worth being straight about: the follicle has no way to sense how long or how heavy the hair is. Nothing in the literature supports the idea that taking weight off buys the hair more time, and I am not going to tell you it does. A trim does not extend the clock.
How do I tell which one I have?
This is the part worth a conversation rather than a guess, and it is most of what I am doing when someone sits down and says their hair will not grow.
Broken hair and shed hair do not look the same. A hair that reached the end of its cycle comes out whole, with a small pale bulb at the root end. A hair that broke has no bulb, and the ends are ragged where they gave out. Look at what is in your brush.
The ends tell you too. Length lost to breakage looks thin and see-through at the bottom while the hair higher up still looks fine, and it tangles at the very ends. Hair at its terminal length tends to keep a more even weight down its length and simply refuses to go further, no matter how carefully it is looked after.
If it is breakage, we have something to work with and the rest of this article applies. If you are at your terminal length, the honest answer is that we are not going to add inches, and the goal changes: keep what you have looking deliberate and healthy rather than chasing length that is not coming. There is no product for this and there is no trim schedule for it either. Anyone selling you one is selling you something.
So why is a haircut like pruning a tree?
I have used that comparison for years, and I want to be straight about the part of it that does not hold, because it is the interesting part.
Pruning a tree really does push new growth. Cutting your hair does not. A branch is alive at the tip and the plant responds to being cut. Your hair is not alive at the end, so there is no response to be had. Snipping the tip of a branch and snipping the end of a hair are not the same event.
So why does the image still hold? Because the useful half of pruning was never the new growth. It is the removing of what has already died back, and that part translates exactly.
Picture the tree again. The trunk is putting out growth all season without asking your permission. Up at the far tips, the oldest wood is dry, brittle and finished. If nobody ever touches it, the tree still grows, but the die-back at the tips keeps pace with what the trunk sends out, and from across the yard that tree looks like it has been the same size for two years. It has not been idle. It has been trading.
Here is how I say it in the chair. Hair doesn't stop growing at eight or ten weeks. It starts losing length at the bottom as fast as it gains it at the top. Take the damaged weight off and it holds what it grows. It's pruning: you're not forcing new growth, you're stopping the die-back.
The image works. It just points at the other end of the plant than people assume.
How often should you get a haircut for your hair type?
The shape you wear decides where inside that window you sit. The shorter and more precise the cut, the sooner it stops looking like itself.
Short cuts and defined shapes
Closer to four weeks. A fade, a tight taper, a sharp bob or a pixie is a shape held by a line, and a line moves as soon as the hair does. Two weeks of growth on a short cut is visible from across a room.
Mid-length and layered hair
Roughly six to eight weeks. Layers do not go blunt overnight, they go soft, and the weight settles back into the places we took it out of. Heavy at the bottom and flat at the top is layers grown out.
Long hair
Toward eight weeks, and not much further. Long hair keeps looking like itself the longest, which makes it the easiest to neglect and the most expensive to neglect. Its ends are the oldest hair on your head.
Curly and wavy hair
Toward the longer end, because curl hides growth. A curl that has lost its end does not look shaggy, it looks like it stopped curling. When someone tells me the bottom of their curl has gone limp and stringy, the answer is usually a cut, not a product. There is more on curl and this climate in why your curls look different in Colorado.
Color-treated hair
Line the cut up with your color appointment. Lightened ends are more fragile than virgin ends, so they reach the point of breaking off earlier.
Eight weeks is not a number I picked for tidiness. It is where I stop being able to fix a small thing with a small cut. In this climate it arrives sooner than it would somewhere humid, because much past eight weeks here you are usually not booking maintenance any more, you are booking a repair on ends that have already started to split.
What does waiting too long actually cost?
Two things, and people usually only see the second one.
The first is length, which is the irony of the whole thing. Come in at eight weeks and I am taking off a small amount of tired end. Come in at six months and the damage has traveled up the strand, so the cut that gets you back to healthy hair has to start above where the trouble stops. Waiting to protect your length is the most common way people lose it. Nobody is stalling on a haircut for fun. They are stalling because they do not want anything taken off, and that is exactly what ends up costing them more.
The second is the shape. A haircut is built with weight in specific places, and every week that weight shifts a little as the hair grows. For a while that reads as the cut settling in and looking lived in. Past a point it reads as the cut giving up. The layers stop landing where they were cut to land, the ends go wide, and the thing that used to fall into place in the morning now needs a tool and ten minutes. That is not your styling getting worse. That is a shape that has outgrown its own instructions.
It usually shows up in behaviour before you see it in the mirror. Hair that will not brush through at the bottom. Ends that look thin while the roots look fine. A ponytail gone wispy at the tip. Styling that stops holding. In this climate that arrives sooner than people expect, which is a running theme in what we have written about Colorado winters and Colorado summers.
Is a trim to grow it out different from a trim to keep a shape?
Yes, and it is worth saying out loud when you book, because they are two different jobs.
Trimming to grow it out is the pruning cut. I am taking the compromised ends and nothing else, keeping the perimeter as low as it can honestly sit, and leaving the shape alone. Small and often beats large and rarely here, because the point is to stay ahead of the splitting rather than to chase it once it has traveled. You will not walk out looking dramatically different, and that is the point. The goal is that in a year you have the length you have actually been growing all along, instead of the length that survived.
Trimming to keep a shape is a rebuild. The cut gets re-established at the length it was designed for, weight goes back where it belongs, and the lines are reset. Here you are choosing the look over the inch, on purpose.
Both are correct. They just want different appointments, and saying which one you are after saves everybody the sinking feeling when more comes off than you pictured.
Where to start
If you have been stuck at the same length for a year, bring that to the appointment and say it first. Whether your ends are breaking or you have reached the length your hair is built for changes what we do and what I am going to tell you is possible, and it is worth ten minutes to work out which one it is before we start cutting. Tell us when it was last cut and what you are trying to get to. We talk the plan through before we start, then we get to work.
You can book online or call the salon, and you are welcome to ask for me by name. There is more about precision cutting on my page, and pricing is on our services page.