There is exactly one rule that governs every bar tab situation in existence: if you have to ask whether you should pay, you already know the answer.

Everything else is just footnotes to that rule. But since we keep getting it wrong, here are the footnotes.

Opening the Tab

Open a tab if you're having more than one drink. Paying cash for each round like it's a vending machine slows down the bartender, annoys the people behind you, and signals to everyone in the immediate area that tonight is going to be a bureaucratic event.

Hand over the card. Tell them to keep it open. Move on with your life.

If you're the first one at the bar before the crew shows up: open your own tab. Do not put everyone on your card unless you are actively choosing to play host. If you are choosing to play host, do it with conviction — don't do it and then act surprised at 1am when the bill is $340.

Splitting

Split evenly unless there's a massive, obvious disparity. One guy had four drinks and a round of shots. One guy had a seltzer and left at 10. You can acknowledge the disparity and adjust. This is called being a reasonable adult.

What you cannot do is itemize. The second someone at a bar pulls up their notes app to calculate individual drink costs plus tip, the night is already over. That math doesn't live here.

The move: person who had significantly less throws in a fair flat amount, everyone else splits the rest. Takes 90 seconds. Nobody hates anybody.

Covering a Round

The round system is a gift when it works. It works when the group is similar in pace and nobody disappears after their free round lands. The free-round ghost is the greatest interpersonal betrayal in bar culture. You know who you are. So does everyone else.

If you buy a round, you are not owed a round. You're participating in a social contract. The ledger evens out over time among people who are actually your crew. If it doesn't even out, that information is useful: you now know something about those people.

Closing the Tab

Close it when you're done. Not when you think you might be done. When you are done.

The guy who closes the tab and then orders one more drink has to go back to the bartender and do the whole thing again. This person is always, somehow, fine with this. They are a chaos agent. They are not your enemy. But they are a chaos agent.

Tip a minimum of 20% on anything that required sustained human effort. More if the service was genuinely great. The bartender who remembered your drink on a Saturday night without you having to repeat it deserves a real acknowledgment of that achievement.

The One Non-Negotiable

If someone is clearly covering the tab as a gesture — birthday, celebration, just got a new job, no occasion at all — you say thank you and you mean it. You offer to cover the tip. If they decline, you buy the next round somewhere else.

The gesture matters. The response to the gesture matters more.

That's it. That's the whole guide. Go out there and behave accordingly.