I've researched this many times and I've even tried reading the bajan laws. It's been very unclear to me what the law says - I've been able to buy alcohol in restaurants and supermarkets (even 40% rum) when I was only of the age 15-16.
What's the legal drinking age in Barbados? Is there even one?
There is no law in Barbados that determines the legal drinking age. The closest law Barbados has is from the Liquor Licenses Act of 1909, where is stipulates that licensed bars cannot sell to anyone under the age of 16.
There has been recent community efforts to update the law (from age 16 to 18) because it is outdated and over a century old.
“We are asking our leaders to raise that age from 16 to 18 and thereby
any person who is 18 years old who will be purchasing alcohol, they
need to show some form of identification to prove they are in fact 18.
We are also asking for penalties for persons who purchase alcohol for
children and also [for] persons who sell alcohol to these minors.” - Sharmane Roland-Bowen, President of the Barbados Road Safety Association (BRSA)