You can undergo facelift as early as 40s and as late as 80s safely. When you have your first facelift is dependent on how quickly you age. Your aging is dependent on your genes, sun exposure, and activity level. Everytime you do this surgery, you are going to look 10 to 15 years younger. How many times you perform this surgery in your lifetime is going to be dependent on how young you want to look. At some point, it may look silly if you are for example 80 and look like you are 40 on your face. Remember, that you should try to keep harmony throughout; you can’t look 40 and have your entire body look 80!
Interestingly, secondary facelifts are typically quicker to perform since the plane of dissection has already been created from the initial surgery.