There is a number on your POS report at the end of every shift, and there is a different number on your P&L. Most operators know these figures do not match, but fewer can explain precisely why — or why the gap between them is one of the most important things to understand about your restaurant’s financial model.
Gross sales and net sales are not interchangeable terms. They measure different things, and confusing them leads to a consistently distorted view of revenue, costs, and profitability. If you are benchmarking your food cost percentage, your labor percentage, or your prime cost against gross sales rather than net sales, every number is wrong.
What Gross Sales Means
Gross sales is the total revenue collected at the point of sale before any deductions. It includes everything: food, beverage, merchandise, the 20 percent tip on the credit card, the mandatory service charge, the third-party delivery commission on the guest-facing check total, and any taxes collected on behalf of the government.
It is the largest revenue number you will see, and it is the least useful for financial management. Gross sales includes money that was never yours to begin with — sales tax belongs to the government, tips belong to your employees, and delivery platform revenue includes fees that get clawed back immediately. Using gross sales as your baseline inflates every revenue figure and deflates every cost percentage.
What Net Sales Means
Net sales is what you are actually left with after removing the items that flow through your P&L but are not truly your revenue. The primary deductions from gross to net are:
Sales tax. Tax collected on food and beverage is a liability, not revenue. It is collected on behalf of the government and remitted monthly. Including it in your revenue base artificially inflates gross sales and should never appear in net sales.
Comps and voids. Meals comped for service failures, manager discretion, or promotional purposes, and items voided after ordering, reduce actual revenue collected. Net sales reflects what guests actually paid, not what was initially rung.
Discounts. If you run loyalty program discounts, happy hour pricing, or employee meal programs, those discounts reduce actual cash collected. Net sales captures the discounted amount, not the menu price.
The formula is straightforward:
Net Sales = Gross Sales − (Sales Tax + Comps + Voids + Discounts)
In a typical full-service restaurant, net sales might run 85 to 92 percent of gross sales, depending on your tax rate, comp policy, and discount programs. The spread is meaningful.
Why This Matters for Every Metric You Track
Every cost percentage in your restaurant — food cost, labor cost, prime cost — should be calculated against net sales. Not gross sales. The reason is simple: your costs are real regardless of what the revenue line looks like. If you calculate food cost as a percentage of gross sales, you are dividing real cost by an inflated revenue number, which makes your food cost percentage look lower than it actually is.
Here is a concrete example. A restaurant has $100,000 in gross weekly sales. After removing $8,000 in sales tax, $2,000 in comps, and $1,500 in discounts, net sales are $88,500. The kitchen spent $28,000 on food and beverage that week.
Food cost against gross sales: $28,000 ÷ $100,000 = 28.0%
Food cost against net sales: $28,000 ÷ $88,500 = 31.6%
That is a 3.6-point difference on a single metric. If your target food cost is 30 percent and you are benchmarking against gross sales, you believe you are performing well. You are not. You are over target, and you cannot see it.
Third-Party Delivery and the Gross/Net Problem
Third-party delivery platforms introduce an additional layer of complexity. When a guest orders a $50 meal through DoorDash, your POS may record $50 in gross sales. DoorDash then remits approximately $65 to $70 of that to you after taking their 15 to 30 percent commission — but the exact treatment depends on your POS integration and how delivery revenue flows into your reporting.
Some operators track delivery revenue at the menu price (gross) and record the commission as a separate expense. Others record only the net remittance as revenue. Neither is wrong as long as it is consistent and understood — but the two approaches produce dramatically different revenue figures and different cost percentages. If you are comparing your delivery economics to your dine-in economics, you need to make sure you are using the same basis.
The Practical Fix
Pull your last month’s P&L and confirm which revenue figure is being used as the denominator for your cost percentages. If your accounting software is pulling from gross POS sales rather than net sales after tax and comps, your cost percentages have been understated since the day you opened.
Most POS systems can be configured to report net sales separately. Most accounting platforms can be set up to receive net sales rather than gross. It is a one-time configuration fix that makes every subsequent month’s reporting accurate.
It is also worth establishing a clear internal definition — written down, shared with your bookkeeper or accountant — of what is included in and excluded from net sales for your specific operation. What you comp, how you handle employee meals, whether delivery is recorded gross or net of fees: these are policy decisions that should be made deliberately, not defaulted to.
The author is a former CFO for a multi-unit restaurant brand. RestaurantBottomLine.com is dedicated to helping independent operators protect their financial model.
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