Full Head vs Half Head Foils: Which Do You Actually Need?
A half head covers the top and sides of your hair, typically 30 to 40 foils. A full head goes all the way through, including the underneath and nape. For most people who wear their hair down, a half head is enough. You need a full head if you wear your hair up regularly, want all-over brightness, or are making a significant colour change. The price difference is roughly $80 to $120 and one extra hour in the chair.
I am Taylah, a blonde and brunette colourist at KOHORT Studio in Richmond. "Full head or half head?" is the second most common question I get after "how much will this cost?" They are actually the same question, because your answer to one dictates the other. Here is how I walk clients through it.
What exactly is the difference between a full head and a half head of foils?
The names describe coverage, not effort.
| Service | Coverage | Typical foil count | Who it suits |
|---|---|---|---|
| Half head foils | Top section and sides (the hair you see face-on and in a ponytail) | 25 to 45 foils | Clients who wear hair down, want brightness without big commitment |
| Full head foils | All over, including the back and underneath | 60 to 90+ foils | Clients who wear hair up, want consistent all-over colour, making a big change |
| T-section or partial | Crown and fringe area only | 15 to 25 foils | Maintenance top-up between larger services, not a standalone refresh |
The main thing to understand is that half and full are not about quality, they are about how much of your hair gets lifted. A beautifully placed half head on fine or mid-length hair can look complete and dimensional. A rushed full head on the wrong client can look flat and overworked. The service has to match your hair and your lifestyle.
When is a half head foils genuinely enough?
Most of the time, honestly. The hair you see when your hair is down sits on the top half of your head, which is exactly what a half head covers. If you have fine or medium hair and you wear it down most of the time, you would be paying a significant premium for colour that stays hidden underneath.
Half head foils work best when:
- You wear your hair down or in a loose half-up most days.
- You want brightness around the face and on the surface without going all-over.
- You want a softer, more natural-looking highlight rather than a fully saturated blonde.
- You are maintaining an existing lighter base and topping up what has grown out.
- You are budget-conscious and want to stretch your visits.
The lighter the overall look you want, the more foils you need, which eventually tips from a half head into a full head regardless of what you call it. This is where the quote depends on a real consultation rather than a number over the phone.
When do you actually need a full head of foils?
There are a few situations where a half head will leave you disappointed, and knowing them upfront saves you from a result you are not happy with.
You need a full head when:
- You wear your hair up. A ponytail, bun, or top-knot exposes the back and under-sections constantly. If those are dark and the top is light, the contrast reads as unfinished.
- You want all-over, consistent brightness. Half head foils will never give you a true all-over blonde. The back stays darker by design.
- You are doing a big colour change. Going from a dark base to a lighter all-over tone means you need to lift all of it. A half head would leave you with a two-tone result.
- You have very thick hair. On thick or long hair, 40 foils on the top section can still leave obvious contrast to the underneath. Your colourist will tell you at the consultation if your hair volume changes the equation.
- You are growing out a previous all-over colour. If you had box dye or an all-over service before, the underneath may be a different depth than the top. A full head brings everything to the same starting point.
How do costs and upkeep compare?
This is where the decision often lands. Here is a realistic comparison, keeping in mind that prices vary by salon and hair length. For a detailed Melbourne price breakdown see the full highlights cost guide.
| Half head | Full head | |
|---|---|---|
| Typical Melbourne price (foils only) | $180 to $250 | $250 to $400+ |
| With toner | $220 to $340 | $290 to $490+ |
| Appointment time | 1.5 to 2.5 hrs | 2.5 to 4+ hrs |
| Recommended refresh interval | 10 to 14 weeks | 8 to 12 weeks |
| Annual cost (mid-range, 5-6 visits) | approx. $1,100 to $1,700 | approx. $1,500 to $2,400 |
The annual cost comparison is the number most people miss. A half head every twelve weeks (roughly four visits a year) is often cheaper over twelve months than a full head every eight weeks, even though each individual ticket looks smaller. That is a conversation worth having with your colourist before you commit to a service.
A toner is almost always worth adding regardless of which service you book. It neutralises any brassiness and gives the colour its finished quality. Skipping it to save $50 is the most common way clients end up disappointed with otherwise good foils. I wrote about exactly why in the piece on why blonde turns brassy.
What about foilage, balayage, or babylights instead?
Foils are not the only way to add dimension and lightness. Whether a foil service or a painted technique suits you better depends on the finish you are after.
- Foilage combines hand-painted balayage with a foil over the top for more lift and a brighter result than free-hand balayage alone. It is a good middle ground when you want softer placement but more brightness than classic balayage delivers. There is a full explainer at foilage explained.
- Babylights are very fine foils placed to mimic the way hair naturally lightens at the root. They create a soft, natural-looking dimension rather than defined highlights. See the babylights guide for detail.
- Balayage is hand-painted colour with no foil. It grows out beautifully and needs less frequent visits, but it does not get as bright as foils. The balayage vs highlights vs foilage comparison covers all three side by side.
Which KOHORT stylists do full and half head foils?
Highlights and foil work at KOHORT are handled by Taylah, Grace, and Sheridan, all of whom work with both half and full head services.
- Taylah specialises in blonde and brunette colouring, including dimensional foil work and bronde finishes. See Taylah's page to book.
- Grace is known for natural blonde, balayage, and highlights across a range of bases. See Grace's page.
- Sheridan is a lived-in colour and blonde specialist. See Sheridan's page.
Each stylist books their own calendar. Find everyone on the team page and book directly from there.
Frequently asked questions
What is the difference between a full head and half head of foils?
A half head covers the top and sides of your hair, typically 25 to 45 foils. A full head includes the back and underneath sections as well, giving consistent all-over colour. The right service depends on how you wear your hair and what result you want.
Is a half head of foils enough for most people?
For most people who wear their hair down, yes. The visible surface of your hair sits in the top half of your head, which is what a half head covers. You only need a full head if you regularly wear your hair up or want all-over consistent colour.
Can you see the difference between half and full head foils?
When your hair is down, often not. When it is up, yes. The underneath stays darker with a half head, which looks unfinished in a ponytail or bun. If you wear your hair up regularly, a full head is worth it.
How long does a full head of foils take?
Two and a half to four hours, depending on your hair length, density, and how light you are going. Add toning and a blow-dry and you are looking at three to five hours total for a longer appointment.
How much more does a full head cost than a half head?
Typically $80 to $150 more before toner and treatments. In Melbourne in 2026, a half head sits around $180 to $250, a full head around $250 to $400 or more depending on length and the colourist.
How often should you get a full head of foils?
Every eight to twelve weeks. Fine or medium hair that lifts cleanly can stretch to twelve weeks, especially if you use a toner or gloss between visits. Very dark or dense hair that shows regrowth quickly may need the shorter end of that range.
Should I get foils or balayage?
Foils give more control, brightness, and lift. Balayage gives a softer, lived-in result that needs less frequent maintenance. If you want to be noticeably lighter, foils are usually the right call. If you want subtle dimension and a longer time between visits, balayage may suit you better.
Do I need a bond treatment with foils?
Not technically required, but strongly recommended if your hair has any history of damage, previous colour, or if you are lifting significantly. A bond builder like Olaplex or K18 run through the lightener protects the hair fibre during the lift and noticeably improves condition in the weeks after.