A restaurant's variable costs are the expenses that change directly or proportionally with the level of sales or production, such as ingredients, drinks, delivery commissions or consumables used per service.
Variable costs in a restaurant include all the expenses that rise or fall as the level of business activity changes. If you sell more dishes, you use more ingredients; if you take more delivery orders, you pay more commission; if you serve more covers, you use more bread, packaging, napkins or cleaning products tied to service. That is the main difference from fixed costs, such as rent, insurance or part of the core staff, which stay the same even if the restaurant sells little. In hospitality, the most visible variable cost is food cost, but it is not the only one.
Beverage cost, consumables linked to each sale, platform commissions, variable promotional discounts, takeaway packaging, the variable part of certain utilities and, in some models, overtime or extra staff directly tied to peaks in demand are all included. Understanding variable costs is essential because they determine how much margin each euro of sales leaves to cover fixed costs and generate profit. Two restaurants can have the same revenue and very different results if one has variable costs of 32% and the other 45%. The first keeps 68 cents of every euro to pay for overheads and profit; the second keeps only 55 cents.
This metric connects directly with contribution margin, the break-even point, food cost, menu engineering and profitability by channel. It also forces you to analyse each line of business separately: dining room, terrace, delivery, events and catering can have different variable costs. Selling through delivery may increase revenue, but if commission, packaging and discounts eat up too much margin, it may contribute less to the business than a sale in the dining room. That is why variable costs should not be seen merely as an accounting percentage, but as a tool for commercial and operational decisions.
Total variable costs = Sum of costs that change with sales or production
To calculate variable costs for a period, add up the expenses that depend directly on volume: food usage, drink usage, packaging, channel commissions, variable discounts and other per-service consumables. You can then express the total as a percentage of sales: (Variable costs / Net sales) × 100. If a restaurant turns over €60,000 excluding VAT and its variable costs are €18,000 in food, €4,800 in drink, €1,200 in packaging and €2,000 in commissions, total variable costs are €26,000. The variable cost ratio is 26,000 / 60,000 × 100 = 43.3%.
The contribution margin would be 56.7%, i.e. the share of sales available to cover fixed costs and profit.
A restaurant sells a burger for €15 excluding VAT. Its ingredients cost €4.20, delivery packaging €0.80, and the platform commission, when sold through that channel, is 25% of the price: €3.75. In the dining room, the burger's direct variable cost is €4.20, leaving a contribution margin of €10.80. Through delivery, the variable cost rises to €8.75 and the margin falls to €6.25.
The dish still generates sales, but it contributes much less towards rent, fixed staff and profit. Based on this analysis, the manager decides to raise the delivery price slightly, create a combo with a high-margin drink and limit aggressive promotions on that channel. The decision is not made on gut feeling, but by seeing how the real variable cost changes by channel.
Variable costs matter because they determine the incremental profitability of each sale. Selling more is not enough: you need to know how much is left after producing and delivering that sale. If variable costs are out of control, a restaurant can fill its tables or multiply its orders and still not improve its cash position. This metric helps you set prices, evaluate promotions, decide which dishes to promote, compare channels and calculate the break-even point more precisely.
It also helps you detect operational problems: supplier price rises, poorly controlled portions, waste, recipes that have not been updated, excessive commissions or discounts that destroy margin. When the team understands which costs are variable, it can make better decisions on the menu, purchasing, production and marketing.
Zindra helps you separate variable and fixed costs by combining sales, purchases, recipe costings, inventory, channels and commissions. That way you can see the real variable cost by dish, category, site or channel, calculate contribution margin and understand which sales genuinely help cover your break-even point and improve profitability.
Tools and content to go deeper into this concept.
Food cost is the percentage of a dish's selling price that goes on the cost of its ingredients. It is the single most important indicator of how profitable your menu is.
Contribution margin is the difference between a dish's selling price and its variable cost (mainly ingredients). It shows how much each dish contributes towards fixed costs and profit.
The break-even point is the level of sales at which a restaurant covers exactly all its costs (fixed and variable), making neither a profit nor a loss. It is the minimum turnover needed to survive.
Beverage cost is the percentage of a drink's selling price that goes on what the drink cost to buy. It is the key indicator for measuring the profitability of the drinks, wine and cocktail list.
Sales mix is the actual breakdown of what a restaurant sells, by dish, category, channel or time of day. Analysing it shows not just how much you sell, but exactly what you sell and how it affects your margin.
COGS, or cost of goods sold (CMV in Spanish accounting), measures the value of the products a restaurant has actually used or sold in a period. It is a key metric for understanding the real cost of operations, not just what has been bought.
Every hospitality term with formulas, examples and benchmarks in a handy PDF.
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