I'm just curious.

Can I also get a range depending on the type of assignment? (e.g., natural look, glamor, ect)

Thank you.

Most competent MUAs can do it in 20 to 30 minutes for a simple look to night time make-up. Beauty work and cover shots can be 15-60 minutes.

Some comprehensive beauty work takes up to 2-3 hours if the face needs prep, additional corrections and accessories. If you add hair color and styling, that may take more than 1/2 day.

Rush work 5-15 minutes.

While the answer depends upon the look desired, working conditions and the model, my personal averages can run around 20-25 for makeup at most, another 10-45 for hair depending on the style and what the model's hair is like. But if there's limited time and I have to I can bang out a beauty look in 25 for hair and makeup.

I can do full hair and makeup in 30-45 minutes. Sometimes it takes longer depending on models skin condition, the look asked for, etc, etc. I usually tell them an hour.

Though I am constantly asked to go slower when on big productions.

I was always rushed when I first started out.. newer photographers seem to want h/m done in 30 minutes.

A reasonable expectation is an hour for hair and makeup (with 2 people), hour and a half for one.

The MUAs that I have worked with average about 45 minutes to an hour for my face doing basic makeup and a dash of color in the eyes. I much prefer to do my own face because of these experiences. I cannot say all of my experiences have been less than pleasing, but when I can do better after NOT going to beauty school, I tend to wonder.

With this said, I do not doubt the competency of any of the MUAs I have not worked with. I simply state the my limited experience tends to make me wary.

I can do a full face in about 20 minutes, longer if the look is more complicated, of course.

Perfect timing for this thread OP; I was just about to ask this.  In the past five years, I usually did not use make up and hair pros in the past because I really liked a just-out-of-bed or just-out-of-the-shower look, and I felt that valuable time was taken up when I did have an artist.  I am becoming more of a believer in the use of a mua-hair pro as I am beginning pursue paid work: most paying clients, the models and viewers like it when Nature gets a little help.  I also like how the models enjoy being pampered and really are more relaxed and get into the shoot, with the extra service.  I wasn't sure what amount of time is normal.
Not to hijack the thread, I will say this... We are all on Model mayhem to increase the number of shoot job opportunities; based on my experience and what I see, make up artist will get more work if they make their value more obvious to the photographers.  The money flows from or thru us.

I did MU for a wedding and avg 30 mins per person. Took me 4 working hours to get through 8 ladies and this included the bride and full lashes on all. If I am doing a Glamour shoot and its just one person I will go a little slower @45 mins

Depending on the look, I can bang it out in 20-30 mins, I've been working on my speed and being mindful of that has helped. I'm almost inclined to bring a timer lol

30 minutes for a simple look and 45-1 hour for more complicated looks.

With hair and makeup, my stylists usually take between 2-2 1/2 hours

About 2 hours for hair & makeup

I don't like rushing through stuff  as I am a perfectionist. When I work with other makeup artist I want them to take their time to create a flawless look and not just rushed through it and give me something half assed.

For self promotion projects, I control the resources and time for the look, makeup and hair to be created for the shoot , and as such can work with extended time  into an hour or more if need be .( yet the call time for hair n make-up  is often very early morning of the shoot day) .

If it is client shoot, or location work, and the make-up /hair is booked thru my services, then my team is got to be on game and produce results with time constraints between sets. 

Open ended creative time often works against a shoots budget for many a reason or  for the use of a locations natural lighting .
And as I have found will contribute to the loss of scope of the original shoot.   

This can some times works toward a successful shoot and happy client, yet I have experienced clients who only add delay to the shoot schedule with on the fly creative suggestions and then find they are not enjoying the results.