POS for bars and nightclubs

Published by KwickPOS, a restaurant POS company. We include KwickPOS in comparisons and say so when we do. How we handle this.

A bar or nightclub needs a POS built around open tabs: fast drink buttons, card pre-authorization so a walkout doesn't cost you the tab, tabs you can find, merge and transfer between bartenders in seconds, happy-hour prices that switch on schedule, and pour-cost reporting that shows where liquor is going. Test a rush of 30 open tabs in the demo.

Most restaurant POS systems were designed for table service: covers, courses and a check at the end. A bar inverts the priorities. Speed matters more than layout, tabs matter more than tables, cash is still common, and a few ounces of over-pouring on every drink adds up faster than wasted food. This guide covers what a bar POS has to do and what to make a vendor prove.

Speed behind the bar

Open tabs

The tab is the bar's basic transaction. A guest orders a first drink, leaves a card or opens a cash tab, orders again and again, and pays once. A weak tab system leads to mixed-up cards and arguments at close.

Card pre-authorization: protecting the tab

When a guest opens a card tab, the POS can place a hold on the card, and then capture the actual total when the tab closes. If the guest walks out, you still have an authorized card for the tab. Vendors document this differently:

Visa's rules matter for tips and final totals. Visa's guide for restaurant merchants says businesses classed as restaurants, bars and fast-food restaurants may add up to 20% to the authorization amount without liability for authorization-related disputes. That document dates from 2018, so ask your processor what applies to your account today, and what happens when a tab plus tip goes over the hold.

In the demo, open a tab with a card, add drinks, add a 25% tip after close, and ask the vendor to show exactly what gets captured.

Happy hour and scheduled pricing

Price changes at 4 p.m. and back at 7 p.m. shouldn't depend on a manager remembering. Set happy hour up as a schedule:

Rules on drink promotions vary by state and sometimes by city. Check your state's alcohol authority before you set up a happy hour, and make sure the POS can do what the rules allow, for example by limiting a special to certain hours.

Pour cost and liquor inventory

Pour cost is what you spend on the drinks you sell, as a share of what those drinks bring in. The POS calculates the theoretical number from your recipes and sales; your bottle counts give the actual number. The gap shows over-pouring, spills, unrecorded comps and theft.

A cocktail sells for $12 and its ingredients cost $3.20. Its theoretical pour cost is $3.20 ÷ $12 = 26.7%. If your bottle counts show you used more liquor than 40 of those cocktails need, the difference is liquor you paid for and didn't sell.

ID checks

Many bar POS systems can connect an ID scanner that reads the barcode on a driver's license and shows whether the guest is old enough, or show a "confirm ID checked" prompt when an alcoholic drink is rung. If you check IDs at the door instead, the POS should let you turn the prompt off so it doesn't slow the bar. Your state alcohol authority sets what records you have to keep.

Splitting checks

A group that shared pitchers and rounds wants to split evenly or by what each person had. The POS should split a tab by headcount or by item in a couple of taps, take several cards against one tab, and close the tab when the total is paid.

Tips and tip pooling

Bars often pool tips between bartenders and barbacks. The U.S. Department of Labor says the Fair Labor Standards Act "allows employers to require employees to share or 'pool' tips with other eligible employees", and its fact sheet sets out who is eligible. State law can add rules. The POS should record tips per transaction and per person, and produce a tip-out report you can check. Read the fact sheet, and ask your accountant before you change how you share tips.

When the internet drops

A Saturday-night outage with 80 open tabs is the scenario to test. Ask what happens to open tabs and stored pre-authorizations while offline, whether cards can be taken offline, and who carries the risk of an offline card that's declined later. Toast's offline-mode article states that "you are responsible for any declined, expired, or disputed offline payment transactions". Assume the same unless a vendor's contract says otherwise.

What to bring to the demo

  1. Your drink menu with call brands, sizes and upgrades.
  2. Your happy-hour schedule and what it covers.
  3. How many tabs are open at your busiest hour.
  4. How you split tips today.

Then run the general tests in how to choose a restaurant POS. If you also serve food, the kitchen-routing parts of the pizzeria and Mexican restaurant guides apply too.

Common questions

What is card pre-authorization on a bar tab?

A hold placed on the guest's card when the tab opens, so the final total plus tip can be captured when it closes, even if the guest leaves.

How should happy hour work in a POS?

As a schedule by day and hour, limited to the categories it covers, with the discount shown on the receipt and in reports. Check your state's rules first.

Can I require tip pooling?

The U.S. Department of Labor says the FLSA allows employers to require tip pooling with other eligible employees, and that managers and supervisors may not receive tips from the pool. State law can add rules.

Sources

  1. Configure and use card pre-authorization, Toast. Checked October 1, 2026.
  2. Enable and configure preauthorization for bar tabs, Square. Checked October 1, 2026.
  3. Chip payment acceptance for restaurant merchants (2018), Visa. Checked October 1, 2026.
  4. Fact Sheet #15: Tipped employees under the FLSA, U.S. Department of Labor. Checked October 1, 2026.
  5. Using Toast in offline mode, Toast. Checked October 1, 2026.