Where to buy makeup in Bangkok?

1/ Drugstores: Boots, Watsons, Eve and Boy

Eve and Boy, Asoke

I have a preference for Eve and Boy, as it gathers all drugstore makeup brands in one place, with very interesting deals on some brands you can't find at Boots and Watsons (OPI and China Glaze nail polishes, Real Techniques brushes, Elf makeup).

Otherwise, you will find all regular drugstore brands at very good price: Maybelline, L'Oreal, Revlon, Collection 2000, Essence, Catrice, Kate, 4U2, LA Girl, Canmake...

There are several Eve and Boy stores in Bangkok.

2/ Beauty Terminal at Terminal 21 mall (3rd floor)

Little shop with lot of imported products and 20-30% discount on most of luxurious brands you find at the department store (skin care, makeup, perfumes, nailpolish).

Makeup brands you can find: Urban Decay, Nars, Mac, Physician Formula, Clinique, Lime Crime, Sleek, Sigma, Real Techniques, Rimmel, Barry M, Laura Mercier...

Nail polish brands: OPI and Zoya mainly 

You can also find a lot of high end skin care products at discount price (La Mer, Clinique...).

You can find a lot of other stores in this type in different areas of the city, like for example Sun Beauty (BTS Ari, exit 3).

3/ Jae Leng shopping mall, near Don Muang airport (30-40 minute drive from Siam)

Makeup, hair products and perfumes all at 20-40% off compared to department store prices, with some exclusive products.

That's the best place to buy hair salon products at discount price, and drugstore make up at reduced price, including a huge NYX counter with more choice than at the NYX stores in the city. You also have L'Oreal, Maybelline, Revlon. Revlon prices are particularly interesting.

Good discount on products from La Neige as well.

And great choice of nailpolishes from China Glaze, Sally Hensen.

4/ Online shopping: Konvy.com and Luxola.co.th

Konvy is my favorite website to shop makeup and skin care products in Thailand. It has some very good deals and the delivery is fast. Watch out for Mac lipsticks there, they have arrivals pretty often, and the price is the same than in Europe.

Luxola is a more standard website, and prices are good only when there are special discounts on the whole site. Make sure to compare with the store prices because many times it is more expensive. However it carries exclusively some brands, especially Zoeva & Sigma brushes, which are amazing! Check it out!

5/ Small market counters / little resellers

Be careful with the little counters on the markets, a lot of them carry fake makeup. In Thailand, the brands mostly copied are: Mac, Urban Decay (Naked palette), Chanel, Dior.

Just be aware that it is impossible to have real Mac lipsticks at 100-200 THB or a Chanel foundation for 500 THB, or even a Naked palette for 1,000 THB. However, a lot of brands already cheap are not fake on those counters (for example, NYX products can be found in a lot of "street" counters, for a little bit less than at NYX store). 
But for sure, you should check in advance the products you are looking for, so you do not get fooled by a fake packaging.

However, some of little stores resell real products at good price (20-30% off compared to the department store). You can find some good ones at the small market next to Central Ladprao, for example, but in general there are everywhere in the city.
If you know some good stores, do not hesitate to leave a comment below :)

More info...

Even with 20-30% discount, the prices of high-end makeup in Thailand will always be equivalent or still a bit higher than in Europe. Indeed, beauty products are taxed 30% when entering Thailand. So I do not recommend to buy at the department store counters or at Sephora. Prices are excessive. Once you find a good reseller / store, try to order through them, many times you can pre-order the products you like from any high-end brand.

I recommend you to check also at airports, especially for luxurious brands where the price difference can be up to 500-600 Thb (Chanel, Dior, Bobby Brown, Nars...)

Enjoy your shopping time!