One not-so-obvious expense of transitioning to another gender is the clothing swap. "You're changing your whole wardrobe," says Hanson, and depending on how long someone has been cross-dressing, that can add up.

Prata helps women assimilate to the point where they can't be detected as transgender -- including helping them find a personal style. She says that even if a woman has been cross-dressing for a while, they usually don't have everyday, work-appropriate clothing -- nor do they know where to start.

"A cross-dressing wardrobe is more like a girl in her teens who is wearing things to express her femininity," says Prata. "But a professional wardrobe that suits their life is entirely different."

Prata's clients spend anywhere from $2,000 for a seasonal wardrobe to $10,000 for a work wardrobe. Other clients get high-end, customized pieces and spend around $50,000.

One unexpected cost to keep in mind, says Prata, is the cost of shoes from specialty shops. "If you're looking for a size 12 shoe in wide, you're going to pay at least $100," she says.

Cost: $2,000 to $10,000+

Any girl who has lost her makeup bag knows: It's going to cost a small fortune to replace all of it. But for a transgender woman who is still experiencing a five o'clock shadow, makeup isn't optional. The finishing touches can make all the difference in passing as a woman, says Erin Armstrong, a pioneer in the YouTube transgender community and program coordinator for TRANS: Thrive, a non-profit drop-in center.

Prata, who was a makeup artist before she took on image consulting, says even her male-to-female clients who have gone through hair removal typically have bigger pores and rougher skin where their hair used to be, so she recommends something heavier, like M.A.C. Full Coverage Foundation, $32, along with M.A.C. Pro Longwear Concealer, $20. Throw in some high-quality brushes and eye makeup and you're looking at spending around $130, minimum.

If you want to get on Jenner's level, it'll definitely cost you: For her Vanity Fair shoot, makeup artist Mark Carrasquillo prepped her face with over $220 in skin-care products. Those included:

La Mer The Lip Balm, $55
Bioderma Sensiobio H2Om, $19
SK-II Facial Treatment Mask, $95
Clarins Lotus Face Treatment Oil, $53

For makeup, Carrasquillo used similarly priced products on the higher end:

Velour Lashes, $35
Estée Lauder More Than Mascara, $26
Kevyn Aucoin Sculpting Powder, $44
Serge Lutens Lip Pencil, $55
Tom Ford Traceless Foundation S.P.F. 15, $80
Eve Pearl Salmon Concealer, $39
Estée Lauder Stay-in-Place Brow Lift Duo
Tom Ford Eye Defining Pen, $55
Serge Lutens Finishing Powder, $170
Nars Lipstick (in Jungle Red), $27

Additionally, Deborah Lippmann herself applied her nail lacquer in Lady Is a Tramp, $18.

Cost: $130 on the lower end, but $800 on the Caitlyn Jenner level.

HRT: $200 to $1,000 yearly
Hair Removal: $10,000 to $60,000
Counseling: $50 to $200 per session
Facial Feminization: $14,000 to $30,000
Breast Augmentation: $5,175
Body Contouring: $5,000 to $10,000
Genital Surgery: $17,000
Hair: $500 to $15,000
Clothes: $2,000 to $50,000
Skincare and Makeup: $130 to $800

TOTAL: $37,000 to $189,175

It's pretty clear that being a transgender woman is costly, in more ways than one. But as Prata puts it, if making a physical transition makes someone feel congruent, you can't put a price on that.

*Numbers estimated by RealSelf.com.