Bartending soon? Get certified tonight.
TABC-approved seller-server training in about two hours on your phone, certificate ready the moment you pass.
Quick answer
You do not have to be 21 to serve alcohol in Texas. That surprises people, so here is the rule by job type, straight from TABC's age rules.

At a location licensed for on-premise consumption, which covers bars, restaurants, and most venues, employees must be 18 or older to prepare, serve, or otherwise handle alcoholic beverages. So an 18-year-old can bartend, run drinks, and open wine at the table. A 17-year-old cannot pour or carry a drink.
Someone under 18 can still work at a restaurant that serves alcohol. They can cook, bus, host, and even work a register where alcohol is sold, as long as an employee who is 18 or older actually serves the drinks. What they cannot do is sell, prepare, serve, or handle the alcohol itself.
At off-premise locations, the kind where customers take the beer and wine home, TABC does not set an age restriction on employees. A 16-year-old cashier can scan a six-pack. This is also why TABC certification matters for teenagers: cashiers who ring up alcohol count as sellers under Safe Harbor, which is the reason most employers require certification even from teenage staff.
Package stores are the exception in the other direction. Their employees must be 21 or older.
Being old enough gets you on the schedule. Being certified is what keeps your employer's liquor license protected, and nearly every bar and restaurant requires it within 30 days of hire. It is not a license, and Texas does not issue a bartending license at all. It is a course from a TABC-approved school, and managers ask for your certificate.
If your job involves food, which it almost always does at a restaurant, you also need a food handler card within 30 days. There is no age requirement for that one, which makes it the natural first credential for a first job. The accredited food handler course is about an hour, and you can add TABC certification the day you turn 18.
TABC's rules distinguish between where alcohol is consumed. At an on-premises location, like a bar or restaurant, the employee hands an open drink to someone who will drink it there, so the rules set an 18-year-old floor for anyone who prepares, serves, or handles it. At an off-premises location, like a grocery or convenience store, the employee scans a sealed package that leaves the building, and TABC sets no age restriction on that transaction. Package stores sell only alcohol, so their employees must be 21. Same agency, three settings, three answers.
For a teenager working toward a restaurant or bar career, the credentials arrive in a natural order. The food handler card comes first, because it has no age minimum and it is required by law for anyone touching food. TABC certification comes at 18, when serving alcohol at a bar or restaurant becomes legal, and Safe Harbor makes the certificate the thing every manager asks for. The state requires nothing else, and Texas does not have a bartending license. Two short online courses cover the paperwork for the whole career path.
Age rules are about handling alcohol, not about being in the building. Someone under 18 can work at a restaurant or bar that serves alcohol, in any role that does not involve selling, preparing, serving, or handling the drinks. That includes working a register where alcohol is rung up, as long as an adult employee handles the alcohol itself. What an employer cannot do is put a 17-year-old behind the bar, have them open wine at a table, or have them carry drinks to guests, even briefly. If you are asked to, the answer is that TABC rules do not allow it.
These two rules get tangled because they arrive together at a first job. Age is a floor set by TABC based on where you work: 18 at bars and restaurants, 21 at package stores, none at grocery and convenience stores. Certification is a course from a TABC approved school that your employer needs for Safe Harbor protection, and it has nothing to do with how old you are. A 40-year-old with no certificate is the same problem for a manager as an 18-year-old with no certificate. Being old enough gets you in the door. Being certified gets you on the schedule.
The food handler card sits on a third track entirely. It is required by law within 30 days for anyone who handles unpackaged food or food contact surfaces; it has no age minimum, and it comes from the food safety side of state government rather than TABC. A 16-year-old busser needs it. A 30-year-old bartender who cuts limes needs it. It is the one credential in this article that applies to almost everyone in the building.
Eighteen at bars and restaurants, 21 at liquor stores, no minimum at grocery and convenience stores. Once you are old enough for your role, the seller-server course is about two hours, and the certificate is what gets you on the schedule.
18 at a bar or restaurant. TABC's rules require employees at on-premises locations to be 18 or older to prepare, serve, or otherwise handle alcohol.
18. You do not have to be 21 to bartend at a bar or restaurant in Texas.
At a grocery or convenience store, yes. TABC sets no age restriction on employees at off-premises locations. A 16-year-old cannot serve or handle alcohol at a bar or restaurant, and cannot work at a package store.
21. Package store employees must be 21 or older.
Yes. They can cook, bus, host, and work a register where alcohol is sold, as long as an employee who is 18 or older actually serves the drinks.
No. Anyone who works with unpackaged food, utensils, or food contact surfaces needs one within 30 days of starting, regardless of age.
Certified before the 30 days are up.
TABC-approved seller-server training, about two hours on your phone, certificate ready the moment you pass.