The classic mistake: thinking in "salary equivalent"

Many beginning freelancers reason like this: "I earned €3,500 net as an employee, so I'll target €3,500 net as self-employed." This is the royal road to burnout and a bank account in the red.

As an employee, your employer also pays your holidays, your social security, your pension, your training, your equipment, and absorbs the slow periods. As self-employed, all of that has to come out of your rate.

⚠️ Rule of thumb: your gross self-employed income should be roughly double your former net employee salary to reach an equivalent standard of living after charges, contributions, and personal income tax.

The method in 5 steps

Step 1 — Define your target net income

What you actually want to receive in your personal account each month, after everything. Not a dream figure: a number that covers your real needs (rent, groceries, leisure, savings, holidays).

Example: €2,800 net/month × 12 = €33,600/year.

Step 2 — Add personal income tax (IPP/PB)

In Belgium, personal income tax is progressive. For a taxable income around €40,000–60,000, count an effective average rate of 30 to 35% (after tax-free allowance and standard professional expenses).

To target €33,600 net after tax, your taxable income must be ≈ 33,600 ÷ 0.67 = €50,150.

Step 3 — Add INASTI/RSVZ social contributions

In main activity, social contributions are 20.5% of net taxable income (after expenses), up to the annual ceiling. On your €50,150 taxable, add ≈ €10,280 in contributions.

You're now at €60,430 in revenue to generate.

Step 4 — Add your real professional expenses

List everything you spend to work:

  • Accountant: €1,200 to €2,500/year
  • Software, subscriptions, web hosting: €500 to €2,000/year
  • Equipment (computer, screen, furniture) amortized: €800 to €1,500/year
  • Phone + professional connection: €600 to €1,200/year
  • Continuing education: €500 to €2,000/year
  • Liability insurance + income protection: €800 to €2,500/year
  • Coworking or office: €0 to €4,800/year
  • Travel, client expenses: variable

Count a realistic minimum of €5,000 to €8,000/year in expenses for a digital solo freelancer. More if you have a physical office or expensive tools.

Step 5 — Divide by your actually billable days

This is where most people fail. A year has 365 days, but you don't bill all of them:

Days in the year365
Weekends−104
Public holidays (Belgium)−10
Holidays (4 weeks)−20
Sickness/unforeseen (realistic)−10
Admin, prospecting, accounting, training−40
Actually billable days≈ 180

And even these 180 days aren't guaranteed: you won't always have work on all of them. A safety margin of 20 to 30% is healthy. Plan for 140-150 effectively billable days in the first year.

Final day rate calculation

Using the example figures:

Target net income€33,600
+ Personal income tax (≈ 33%)+ €16,550
+ INASTI contributions (20.5%)+ €10,280
+ Professional expenses+ €7,000
Revenue (excl. VAT) to reach€67,430

For 150 billable days: 67,430 ÷ 150 = €449 excl. VAT/day.

For 180 billable days: 67,430 ÷ 180 = €374 excl. VAT/day.

💡 The realistic minimum day rate to live decently as a solo freelancer in Belgium ranges from €400 to €500 excl. VAT/day, depending on your sector, expenses, and ability to fill your schedule. Below €350, you risk struggling.

Hourly rate: same logic

If you bill hourly, divide your day rate by 7 or 8 worked hours. A €450 day rate = an hourly rate of approximately €60 excl. VAT.

But beware: hourly billing often lowers your profitability, because you only bill "active" time whereas with day billing, you bill for availability, context, and mental load.

Project-based pricing (fixed fee)

With a fixed fee, you sell a deliverable, not your time. Advantages:

  • The client knows what they pay upfront (no surprises)
  • Your profitability rises as you become more efficient
  • You sell value, not time

The method:

  1. Estimate the real time the project will take, add 30% margin for unforeseen events, back-and-forth, and revisions
  2. Multiply by your reference day rate
  3. Add a value premium (10 to 30%) if the project has high business impact for the client

Example: a website that would take 8 days × €450 = €3,600. With 30% margin: €4,680. With 20% value premium: €5,600.

The 5 mistakes that kill a freelancer

❌
Comparing yourself to employees Your day rate has nothing to do with what an employee in the same job costs their employer. Compare yourself to other experienced freelancers in your sector.
❌
Forgetting VAT If you're VAT-registered (most freelancers), you must invoice 21% on top. That's not your money — it transits. But NEVER reason in VAT-inclusive in your personal calculations.
❌
Underestimating non-billable days Prospecting, quotes, invoices, training, admin: that easily represents 1 day in 5. If you bill 220 days/year, you'll burn out.
❌
Not raising your rates Your costs rise with inflation, your expertise too. Raise your rates 5-10% per year, or you lose purchasing power without realizing it.
❌
Accepting "the big client at low rate" The big underpaid client monopolizes your time, prevents you from prospecting better, and gets used to the low price. When they leave, you have neither cash nor pipeline.

In summary

Setting your rate isn't a commercial act — it's a management act. You must know what it costs to exist as self-employed before discussing price with a client. Without that, you negotiate blind.

The simple rule: your minimum day rate = (target net income × 2) ÷ real billable days. The rest is fine-tuning. But this rough calculation alone prevents the fatal mistake.

⚖️ Disclaimer. This article provides indicative orders of magnitude. IPP rates, INASTI ceilings, and deductible professional expenses evolve. Verify exact figures with your accountant and on official sites before any decision.

Official sources

INASTI — Social contributions for self-employed
FPS Finance — Self-employed taxation
FPS Economy — Setting up a business
1819.brussels — Support for self-employed