Assalamualikum warahmatullahi wa barakatuhu.Is a halal restaurant allowed to have BYO ('Bring your own bottle', i.e. bringing alcoholic bottles along to be served at a restaurant)? Why or why not? Is the earnings will be halal ?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

It is not permissible for the owner of the restaurant to enable or allow someone to drink wine in his restaurant or to advertise for it. He is also not allowed to cater him when drinking it, in case he brings it, because this is considered helping him in evil and being pleased with it; Allah Says (what means): {And cooperate in righteousness and piety, but do not cooperate in sin and aggression. And fear Allah; indeed, Allah is severe in penalty.} [Quran 5:2]

The money that the restaurant owner receives in exchange for the service of drinking wine is an ill-gotten money.

For more benefit on the prohibition of allowing customers to bring their own alcohol to one’s restaurant, please refer to Fataawa 241972, 122185, and 90464.

Also, for more benefit on the prohibition of alcohol in Islam, please refer to Fataawa 81900 and 81389.

Allah knows best.