Picture this: your kitchen's slammed every Friday night, orders backing up, and you're thinking about hiring another cook. But that new staff member costs way more than just their hourly wage. You need to calculate exactly how much extra revenue they must generate to avoid eating into your profits.
What does a new staff member really cost?
The gross salary is just the tip of the iceberg. Here's what you're actually paying:
- Gross salary: what shows up on their paycheck
- Social contributions: typically 25-30% on top of gross salary
- Work clothing and equipment: €200-500 annually
- Training and onboarding time: 2-4 weeks of reduced productivity
💡 Example:
New chef, gross salary €2,500/month:
- Gross salary: €2,500
- Social contributions (27%): €675
- Work clothing/equipment: €40/month
- Training (first month 50% productive): €1,250
First month total: €4,465
From month 2 onwards: €3,215
Calculate your break-even point
To break even, the additional revenue this staff member generates must cover their total costs. It's the kind of thing you only learn after closing your first month at a loss.
Formula for break-even revenue per month:
Break-even revenue = Total monthly staff costs / (1 - Total cost percentage)
Your total cost percentage includes food cost % plus other costs % like energy and rent.
💡 Example calculation:
Staff member costs €3,215/month (after onboarding):
- Food cost: 30%
- Other costs (rent, energy, etc.): 25%
- Total cost percentage: 55%
Break-even revenue: €3,215 / (1 - 0.55) = €7,144/month
You need €7,144 in extra revenue to break even.
Convert to extra covers
Divide the required extra revenue by your average check. This tells you exactly how many additional guests you need to serve.
💡 Practical example:
Required extra revenue: €7,144/month
Average check: €28.50
Extra covers needed: €7,144 / €28.50 = 251 covers/month
That's roughly 8-9 extra guests per day.
⚠️ Note:
This calculation assumes steady occupancy rates. In reality, an extra staff member can help you serve more guests during peak periods, which speeds up your payback timeline.
Is an extra staff member worth it?
A new hire makes financial sense if:
- You're regularly turning away guests because you can't keep up
- Your current team's overworked and stress is causing mistakes
- You could extend operating hours with additional staffing
- Quality's dropping due to time pressure
Run the numbers first and track your first 3 months closely to confirm you're hitting that extra revenue target.
Tools to track this
A food cost calculator like KitchenNmbrs lets you monitor total staff costs and daily revenue, so you can quickly verify whether a new staff member is paying for themselves.
How do you calculate the break-even impact? (step by step)
Calculate total monthly costs
Add up: gross salary + social contributions (27%) + work clothing/equipment (€40/month) + any training costs. For the first month, also factor in reduced productivity.
Determine your total cost percentage
Add your food cost percentage to your other fixed costs (rent, energy, insurance). This gives you the total cost percentage of your revenue.
Calculate required extra revenue
Divide the total monthly costs by (1 - total cost percentage). This gives you the minimum extra revenue you need to break even.
✨ Pro tip
Track your covers per labor hour for the first 90 days after hiring. If you're not hitting 12-15% more covers during peak service, your new hire isn't generating enough throughput to justify their cost.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Should I include social contributions in the calculation?
Absolutely. Social contributions average 25-30% of gross salary and represent real costs you'll pay. Use 27% as a reliable baseline.
How long does it take for a new staff member to become fully productive?
Expect 2-4 weeks for kitchen staff to hit full speed. During the first month, budget for 50% productivity, which effectively doubles your wage costs for that period.
What if I don't achieve the extra revenue?
Then you're operating at a loss on that hire. Monitor performance closely for 90 days and adjust your approach if needed, or explore process improvements instead.
Can I use this calculation for part-time staff too?
Yes, just calculate proportionally. A part-time employee working 24 hours (60% of full-time) costs 60% of the full calculation but also delivers less capacity impact.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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