Calculating labour cost: from gross to total employer cost
What does an employee really cost? Not the gross salary on the job ad, but the total cost you pay as an employer.
The answer surprises many business owners: count on 1.5 to 1.7 times the gross salary. Sometimes even more.
Here's how to calculate labour cost, which components come into play and, yes, where you can save without running into trouble. Curious about the cost of payroll administration itself? Read our article on payroll administration costs.
Gross salary vs. total labour cost
First, understand the difference, because many business owners assume gross equals their cost. It doesn't.
Gross salary The amount on the employment contract. What the employee "earns". NSSO (National Social Security Office) contributions and taxes are still deducted from this before the employee receives their net salary.
Total labour cost Everything you pay as an employer. Gross salary + employer contributions + holiday pay + other costs.
This is your real cost.
The ratio between the two is called the "factor" or "coefficient". In Belgium it typically sits between 1.5 and 1.7 for a standard employee. But it depends on your sector.
The components of labour cost
Where does your money go? Let's break it down.
Gross salary
The baseline. The agreed salary, determined by:
- The joint committee (minimum salary scales)
- The role and experience
- Negotiation
- What the market is doing
Employer NSSO contributions
The big one. As an employer, you pay 25% of the gross salary to the NSSO, on top of the gross salary. Yes, on top. Hiring your first employee? You may then qualify for NSSO reductions.
Watch out for blue-collar workers: the employer contribution is calculated on 108% of the gross salary. Why? A historical rule, long story. It simply makes blue-collar workers a bit more expensive than white-collar workers on the same gross salary.
White-collar example: Gross salary ā¬3,000 Employer NSSO: ā¬3,000 Ć 25% = ā¬750
Blue-collar example: Gross salary ā¬3,000 Employer NSSO: ā¬3,000 Ć 1.08 Ć 25% = ā¬810
Holiday pay
Employees are entitled to paid holiday pay. The calculation differs by status.
White-collar workers:
- Single holiday pay: normal salary during the holiday (no extra cost)
- Double holiday pay: 92% of the gross monthly salary, paid once
Count on 8-9% extra on top of the annual labour cost.
Blue-collar workers: This works differently. Holiday pay is paid by a holiday fund. The contribution to the fund is 15.84% of the gross salary (2026, indicative). So more expensive.
End-of-year bonus
Depends on your sector. Many CLAs provide for a 13th month or end-of-year bonus. This can amount to an extra month's salary.
Count on 8-9% extra where it applies in your sector.
Other statutory contributions
Various small contributions that add up together too:
- Asbestos fund contribution
- Company closure fund contribution
- Existence security contribution (sector-dependent)
- Other solidarity contributions
Small on their own. But everything counts.
Extra-legal benefits
Do you offer meal vouchers, a company car, hospitalisation insurance or other benefits? These are real extra-legal benefits (fringe benefits), and real costs you have to factor in.
Meal vouchers: Employer contribution up to ā¬6.91 per voucher (2026). At 220 working days: ~ā¬1,520 per year.
Hospitalisation insurance: ā¬300-800 per employee per year, depending on the cover.
Group insurance: 1-5% of the annual salary.
Company car: We could write a separate article on this. The tax component is complex. In short: count on ā¬400-1,200 per month all-in, depending on the model.
The formula
Alright, time for the rule of thumb.
A simplified calculation for a full-time white-collar worker:
Total labour cost = Gross salary Ć factor
Factor ā 1.25 (NSSO) + 0.08 (holiday pay) + 0.08 (end-of-year) + 0.04 (other)
Factor ā 1.45 to 1.55
With extra-legal benefits: 1.55 to 1.70
Put simply: multiply the gross salary by roughly 1.5 and you're in the right range.
Practical examples
Example 1: White-collar worker, JC 200
Given:
- Gross salary: ā¬3,500/month
- Sector: JC 200 (supplementary committee for white-collar workers)
- End-of-year bonus: yes
- Meal vouchers: yes
Calculation per month:
| Component | Amount |
|---|---|
| Gross salary | ā¬3,500 |
| Employer NSSO (25%) | ā¬875 |
| Holiday pay provision (8.33%) | ā¬292 |
| End-of-year bonus provision (8.33%) | ā¬292 |
| Meal vouchers (~ā¬138/month) | ā¬138 |
| Total monthly cost | ~ā¬5,097 |
Factor: 5,097 / 3,500 = 1.46
Example 2: Hospitality worker (JC 302)
Given:
- Gross salary: ā¬14/hour
- Sector: JC 302 (hospitality)
- End-of-year bonus: yes (via the fund)
- No extra-legal benefits
Calculation per hour:
| Component | Amount |
|---|---|
| Gross salary | ā¬14.00 |
| Employer NSSO (25% on 108%) | ā¬3.78 |
| Holiday fund contribution (~15.84%) | ā¬2.22 |
| Other contributions (~2%) | ā¬0.28 |
| Total hourly cost | ~ā¬20.28 |
Factor: 20.28 / 14 = 1.45
Example 3: From net salary to total cost
Business owners often think in terms of net salary. "I want someone who earns ā¬2,200 net."
Fine. But what does that cost you?
Indicative calculation (single, no children):
| Step | Amount |
|---|---|
| Desired net | ā¬2,200 |
| ā Gross salary (indicative) | ~ā¬3,720 |
| ā + Employer NSSO | ~ā¬930 |
| ā + Holiday pay provision | ~ā¬310 |
| ā + End-of-year bonus provision | ~ā¬310 |
| Total monthly cost | ~ā¬5,270 |
Factor: 5,270 / 2,200 = 2.4 (net to total cost)
This is why employers are often taken aback: the employee keeps ā¬2,200 net, but the employer pays ā¬5,270. More than double.
NSSO reductions and benefits
Fortunately, there are ways to bring down labour cost. Not many business owners know this.
First-employee target-group reduction On your first hire, you pay no basic employer contribution for that employee, for life. Saving: 25% of the gross salary. Serious money.
Young-worker target-group reduction Reduced NSSO for employees under 26 with specific profiles.
Work bonus A reduction of the personal NSSO contribution for low salaries. No direct saving for you as an employer, but it makes lower gross salaries more attractive to employees.
Structural reduction An automatic reduction based on salary and company size. Small, but it stacks up.
Ask your social secretariat which reductions apply to you. Because they are not applied automatically.
How this compares to payroll
With payroll you pay an all-in factor, usually 1.65-1.82. This looks higher, but it includes:
- All the components listed above
- Administration costs
- Risk cover (illness, dismissal)
- The payroll company's margin
For temporary staff, payroll is often simpler: one figure that covers everything. No surprises afterwards. More on the pros and cons of payroll in our article on payroll pros and cons.
At Recruit we work with transparent factors. You know exactly what you pay, without surprises. Or fine print.
Tools and simulators
Calculating it yourself is complex. And honestly? It doesn't have to be.
Use the simulation tools of the social secretariats:
- Securex labour cost calculator
- Acerta salary simulator
- SD Worx calculation tools
- Liantis cost simulator
These give a realistic estimate based on your specific situation. Enter your data, see what it costs. Done.
Common mistakes
We see these far too often.
Forgetting holiday pay and the end-of-year bonus These come once a year, but you have to provision for them monthly. Don't leave them out of your budget. Otherwise you get an unpleasant surprise in June.
Looking only at the gross salary The employer contributions are substantial. Always calculate with the total cost. Otherwise your budget is too tight.
Not checking the sector Every sector has its own rules. JC 200 is simpler than JC 302 or JC 124. What applies to your neighbour doesn't apply to you.
Not claiming NSSO reductions Target-group reductions are not applied automatically. Make sure you request them. Leaving free money on the table is a waste.
Forgetting extra-legal benefits Meal vouchers, insurance, allowances. It adds up fast. Add it all together before you take someone on.
In short
The total labour cost is substantially higher than the gross salary.
Count on a factor of 1.5 to 1.7, depending on your sector and benefits. Sometimes more.
The formula in brief:
- Gross salary Ć 1.25 for NSSO
-
- 8-9% for holiday pay
-
- 8-9% for the end-of-year bonus (where applicable)
-
- extra-legal benefits
Use simulation tools for an exact calculation. And don't forget to check which NSSO reductions you can get. Because they're out there.
How Recruit helps you
Don't fancy puzzling over NSSO percentages and holiday pay yourself? We get it.
With Recruit:
- Contracts in under 60 seconds - Create trial and temp contracts without the hassle
- Automatic salary calculation - Correct pay in line with current legislation and your joint committee
- Dimona (immediate employment declaration) and social documents - We handle all the declarations, you focus on your business
- 24/7 personal support - Always a dedicated contact who knows your company
- No fixed monthly costs - Pay only for what you use
Try Recruit or get in touch with our HR experts for tailored advice.
Frequently asked questions
What percentage of the gross salary goes to the NSSO?
The employer pays 25% on top of the gross salary. The employee pays 13.07% of their gross salary. For blue-collar workers the 108% rule applies, which makes the employer contribution slightly higher.
What is the factor for total labour cost?
Indicatively 1.5-1.7 times the gross salary, depending on the sector and extra-legal benefits. With payroll the factor sits between 1.65-1.82. So slightly higher, but then everything is included.
Do I always have to pay an end-of-year bonus?
That depends on your joint committee. Many sectors have a mandatory end-of-year bonus via a CLA. Check the rules of your JC.
How do I lower my labour cost?
Check the available NSSO reductions (target-group reductions). Optimise your salary package (some benefits are more tax-efficient). Consider flexi-jobs or students for peak periods. And ask for advice. Because every situation is different.
The information in this article is purely informative and does not replace professional legal or accounting advice. Labour legislation changes regularly. Always consult the current legislation or contact an HR expert for advice tailored to your situation.