Bar waste is everything you pay for that never reaches a guest as a sold drink. It is rarely one big loss. It is a few ml left in a jigger, a lime cut and thrown away, a drink remade because it came out wrong. Each event is small, so it is easy to ignore. Added up over a month, it is part of your pour cost (CMV, as it is called in Brazil), whether you count it or not.
This article shows where bar waste comes from, how it enters the cost of a drink, and what different levels of waste do to one gin & tonic. The numbers come from the CostFlow engine, using a fictitious bar with fictitious purchase prices, in Brazilian reais; the math is the same in any currency.
Where bar waste comes from
The usual sources are:
- Melted ice and prep leftovers. Juice squeezed for the shift and not used, syrup that goes off, citrus cut and not sold.
- Overpouring. More than the spec in the glass, drink after drink.
- Tasting. Bartenders checking a batch or a new bottle, staff trying a new drink.
- Breakage. A dropped bottle, a cracked glass with a drink in it.
- Drinks returned or remade. Wrong order, wrong balance, a guest who did not like it.
- Unrecorded comps. A drink on the house that never appears in the sales system.
Some of this cannot be avoided. A bar that never tastes its drinks has a different problem. The goal is not zero waste. It is knowing how much you have and where it comes from.
How bar waste enters the cost of a drink
There are two ways to look at it.
The first is the allowance on the recipe card. When you cost a drink, you add a percentage on top of the ingredients to cover the waste you expect. The CostFlow engine uses 5% on the ingredients, and not on the ice, which has its own line. This gives a more honest theoretical cost than one that assumes a perfect bar. The full calculation is in how to calculate cocktail pour cost.
The second is the real waste: what actually happens behind the bar. It shows up only when you compare what you should have used with what you did use. If real waste is higher than the allowance, the difference appears as a gap between theoretical and actual pour cost.
The allowance is a planning number. Real waste is a measured one. Both matter, and they are rarely the same.
Bar waste in numbers: one gin & tonic at three levels
Take the gin & tonic from the example. It sells for R$ 28.00. The ingredients (50 ml of gin and 150 ml of tonic water) cost 5.71, and the ice costs 0.66. Both stay fixed. Only the waste percentage changes:
| Waste | Waste amount | Cost of the drink | Pour cost at R$ 28.00 |
|---|---|---|---|
| 5% | 0.29 | 6.66 | 23.79% |
| 10% | 0.57 | 6.94 | 24.79% |
| 15% | 0.86 | 7.23 | 25.82% |
Going from 5% to 10% waste adds R$ 0.28 to every drink. That does not look like much. But it is R$ 28.00 for every 100 gin & tonics sold: the price of one more drink given away, every hundred. Apply the same logic across every drink on the menu and every month of the year, and the small number stops being small.
Look at the pour cost column too. The recipe, the price and the purchase prices did not change. Only the waste did, and the pour cost moved by about one point at each step.
Overpouring: the waste that does not look like waste
Overpouring rarely feels like waste, because the liquid goes to a guest. But it is liquid you paid for and did not charge for.
In the example, the gin costs R$ 60.00 for 750 ml. If the spec says 50 ml and the bartender pours 55 ml, the extra 5 ml costs 5 × 60.00 ÷ 750 = R$ 0.40 per drink, before any waste allowance. In this example, those 5 ml on their own add more to the drink than moving waste from 5% to 10%.
That is why a spec and a jigger matter. Free-pouring can be consistent in skilled hands, but it is hard to check. A measured pour is easy to check.
How to measure bar waste
You cannot manage what you do not measure. A few practical steps:
- Keep a waste log. A simple sheet behind the bar: date, item, quantity, reason (breakage, remake, tasting, comp, prep leftover). It takes seconds per entry and turns guesses into data.
- Record every comp. If drinks are given away, log them as comps, not as nothing. A comp is a business decision; an unrecorded one looks like waste.
- Check pours. Now and then, measure what goes into the glass against the spec. Do it to calibrate, not to punish.
- Count stock on a schedule. Count at the same day and time each period, so the numbers are comparable.
- Compare theoretical with actual. The theoretical cost of what you sold, against what you actually consumed, gives the total gap. The method is in theoretical vs actual pour cost.
The log tells you where waste comes from. The comparison tells you how big it is. You need both.
What to do with the number
Once you have a measured waste level, three decisions follow.
- Set a realistic allowance. If the bar consistently runs above the allowance on the cards, the theoretical cost is too optimistic. Either the allowance goes up, or the operation changes to bring waste down. Prices built on a cost that is too low are too low.
- Work on the largest source first. If remakes dominate the log, the issue may be training or the spec. If prep leftovers dominate, the issue may be how much is prepared per shift.
- Reprice where needed. If the real cost of a drink is higher than its card shows, its price may need to change. See how to price cocktails.
There is no universal right level of waste. It depends on the concept, the menu and how drinks are made. What matters is that the number on the card is close to the number behind the bar.
Find out where your pour cost goes
Ambar is preparing a pour cost diagnostic for bars, built with the CostFlow engine from your recipe specs and your purchase prices. It opens soon, at the end of November. Leave your e-mail on the /motor page to join the list and hear when it opens.