Most restaurant owners assume part-time employees cost less per hour than full-time staff. But hidden costs like social contributions, training overhead, and shift inefficiencies often make part-time workers 15-25% more expensive. Here's how to calculate real labor costs accurately.
The difference between gross salary and real labor cost
Many hospitality entrepreneurs focus only on the gross hourly wage. That's a mistake that costs the average restaurant EUR 200-400 per month in miscalculated labor expenses. For full-time employees you'll typically pay 25-35% extra on top of the gross salary. Part-time staff? Even higher.
💡 Example full-time chef:
Gross salary: €2,400/month (40 hours/week)
- Employer contributions (23%): €552
- Vacation pay (8%): €192
- Sick leave (average 4%): €96
- Pension (employer share): €120
Total monthly cost: €3,360
Per hour: €3,360 ÷ 173 hours = €19.42
Why part-time can be more expensive
Part-time employees get the same vacation pay, sick leave and pension rights. But they work fewer hours. You'll also face additional costs:
- More administration (multiple contracts)
- Overlap during shifts (2 part-time = more total hours than 1 full-time)
- Training and onboarding more people
- Less flexibility during illness
⚠️ Note:
Don't calculate with just the gross hourly wage. Real costs are 25-40% higher due to social contributions and downtime.
The formula for real labor cost
For accurate comparisons, use this formula:
Real hourly cost = (Gross annual salary + Employer contributions + Downtime) ÷ Actual hours worked
Employer contributions include:
- Social insurance (approximately 23%)
- Vacation pay (minimum 8%)
- Pension (employer share, often 5-8%)
- Sick leave (average 4-6% in hospitality)
💡 Example part-time server:
24 hours/week, €12 gross per hour
- Gross annual salary: €14,976 (24 × 52 × €12)
- Employer contributions (35%): €5,241
- Total per year: €20,217
Actual hours per year: 24 × 45 weeks = 1,080 hours (7 weeks vacation/sick leave)
Real hourly cost: €20,217 ÷ 1,080 = €18.72
Full-time versus part-time comparison
To make fair comparisons, calculate both options down to real hourly costs. And don't forget indirect costs.
💡 Kitchen scenario:
You need 60 hours of kitchen work per week.
Option 1: 1.5 full-time chefs
- Real hourly cost: €19.42
- Total per week: 60 × €19.42 = €1,165
Option 2: 3 part-time chefs
- Real hourly cost: €18.72
- Overlap/inefficiency: +10%
- Total per week: 66 × €18.72 = €1,236
Difference: €71/week = €3,692/year
Including sick leave and downtime
In hospitality, average sick leave runs 5-7%. Part-time employees often have higher rates due to multiple job stress. Factor this into your pricing calculations.
- Full-time: more commitment, often lower sick leave
- Part-time: more flexible, but higher risk of downtime
- Replacement costs: temp workers are 40-60% more expensive
Practical tips for your calculation
Check these points to calculate realistic labor costs:
- Add up all employer contributions (not just gross salary)
- Calculate with actual hours worked (minus vacation and sick leave)
- Include training costs (higher with more part-time staff)
- Calculate efficiency: how much overlap do you have during shifts?
⚠️ Note:
Don't forget indirect costs: administration, training, overlap during shifts. These can cause 10-20% extra costs with many part-time staff.
Tracking labor costs digitally
A system helps you track and compare all labor costs. You'll immediately see what full-time versus part-time really costs you, including all additional charges.
How do you calculate labor costs for part-time versus full-time?
Calculate total annual costs per employee
Add all employer contributions to the gross annual salary: social insurance (23%), vacation pay (8%), pension and estimated sick leave (4-6%). This gives you the real costs per year.
Determine actual hours worked
Subtract from contract hours: vacation, sick leave, holidays and any unpaid breaks. For full-time you typically calculate with 45-47 working weeks per year instead of 52.
Calculate real hourly cost
Divide total annual costs by actual hours worked. This gives you the real cost per hour. Compare this between full-time and part-time options for your final decision.
✨ Pro tip
Recalculate your labor costs every quarter during your first year of operations. Staff turnover and training inefficiencies can inflate part-time costs by an additional 8-12% that most owners miss.
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
Why are part-time employees often more expensive per hour?
Because the same social contributions are spread over fewer hours, plus extra costs for administration, training and shift overlap. The real hourly cost is often 10-20% higher than the gross hourly wage suggests.
Which employer contributions should I include in the calculation?
Social insurance (23%), vacation pay (minimum 8%), pension (5-8%), sick leave (4-6%) and any collective labor agreement supplements. In total you often end up 30-40% above the gross salary.
How do I factor sick leave into labor costs?
Budget 4-6% of gross salary as sick leave costs. Also subtract expected sick days from total working hours to calculate a realistic hourly cost.
Is full-time always cheaper than part-time?
Not always. Full-time has lower administration costs and more flexibility, but part-time can be more efficient for peak hours. Calculate both scenarios including all additional costs.
📚 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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