What a 1% Change Really Means for Your Bar
Updated: Sep 23
Small percentage changes can matter, but extra sales are not automatically extra profit. Before using a trivia night to improve a quiet session, separate revenue, costs and the assumptions behind each number.
This updated explanation replaces the profit promise in our 2015 article. All amounts below are hypothetical US dollars, not results from a customer or a forecast for your bar.
1. State what the percentage applies to
Suppose a bar has $30,000 in weekly sales and cost of goods sold of $10,500, or 35% of sales. Hold sales constant for these two separate examples:
A 1% reduction in the existing $10,500 goods bill saves $105. The new bill is $10,395, or 34.65% of sales.
A one-percentage-point reduction in the cost ratio, from 35% to 34%, saves $300. The new bill is $10,200.
Those are different changes. Likewise, 1% of an $8,400 wage bill is $84, while one percentage point of $30,000 in sales is $300. Write down the starting amount and whether you mean a relative percent or a percentage point.
2. Deduct the costs of extra sales
A 1% sales increase on $30,000 adds $300 in revenue. If goods costs rise with those sales at the assumed 35% rate, they add $105 in costs. That leaves $195 before any extra labor, card fees, prizes, trivia content or other event expenses.
If the only other additional expense in this simplified example is $150 for the event, the incremental contribution is $45: $300 minus $105 minus $150. This is a change against the comparison night, not the bar's total weekly net profit.
The SBA's break-even guidance explains why fixed and variable costs must be distinguished. Use your actual cost behavior; staffing may stay level for a small change in attendance and increase when another shift is needed.
3. Combine changes without counting them twice
A price change and an increase in units sold affect the same sales total. Two successive 1% increases would turn $30,000 into $30,603, assuming both happen. That arithmetic does not establish demand, and the extra $603 still is not automatically profit.
When several assumptions change, calculate one complete before-and-after result. Recalculate goods costs, staffing and event expenses against the same scenario. Do not add savings calculated from one sales level to revenue calculated from another without checking the bases.
4. Apply the numbers to a trivia pilot
Compare the event with similar ordinary nights using the same trading hours. Record sales, goods costs, extra staff time, content, promotion and prizes. Allow for customers who would have visited anyway or shifted their visit from another night.
Our trivia night budget guide takes that comparison into an event-level worked example. Use several comparable nights before extrapolating a weekly result across a year.
For a self-hosted event, preview the February 2020 USA sample pack and compare current USA trivia packages. Include your own preparation, hosting and equipment costs when evaluating the full event budget.
Comments