💰 How much can I earn tax-free on the side in Belgium?

Q: Who qualifies for a flexi-job?

Anyone who worked at least 4/5 for another employer three quarters earlier, plus pensioners — students and lighter part-timers are excluded.

Q: Is flexi pay really net?

Yes — no withholding tax or personal social security up to the yearly cap (±€18,440 in 2026); above it, normal taxation.

Q: What is article-17 association work?

A statute for sport and socio-cultural sectors: up to ±€7,460 a year exempt, with hour and sector limits.

Q: Can I sell on Vinted tax-free?

Selling your own used items is untaxed; systematic buying-to-resell is trade — and platforms report to the tax office under DAC7.

With conditions

Quick answer

Surprisingly much — if you pick the right route. The queen is the flexi-job: anyone with a 4/5 main job (three quarters earlier) or a pension earns in hospitality, retail, care and dozens of sectors tax-free up to ±€18,440 a year (2026) — note: early pensioners under 66 with fewer than 45 career years cap at ±€8,120. Alongside sits association work (article 17) for sport and socio-cultural sectors: up to ±€7,460 (2026) exempt. Smaller routes: occasional citizen services and the sharing economy via approved platforms (own caps, a 10.7 % levy) — and selling your own second-hand stuff stays untaxed. Outside those frames it's simply taxable — or undeclared work.

📋 The rules

Flexi-job: up to ±€18,440/yr (2026) tax-free — 4/5 job or pension required
Early pensioners (<66, <45 career years): cap ±€8,120
Article-17 association work (sport/culture): ±€7,460 exempt
Sharing economy via approved platforms: own cap, 10.7 % levy
Selling your own used items: tax-free (no trading)

🔓 Exceptions

Students: a separate statute (650 hours) — see student jobs
Systematic sales/services outside the frames: declare as (secondary) income

⚠️ Penalties & fines

Earning outside the frames without declaring = tax fraud/undeclared work: back taxes, fines and social-security regularisation. Unmet flexi conditions: requalification with clawbacks.

📎 Official sources

Last verified: 2026-06-20

❓ Frequently asked

Who qualifies for a flexi-job?

Anyone who worked at least 4/5 for another employer three quarters earlier, plus pensioners — students and lighter part-timers are excluded.

Is flexi pay really net?

Yes — no withholding tax or personal social security up to the yearly cap (±€18,440 in 2026); above it, normal taxation.

What is article-17 association work?

A statute for sport and socio-cultural sectors: up to ±€7,460 a year exempt, with hour and sector limits.

Can I sell on Vinted tax-free?

Selling your own used items is untaxed; systematic buying-to-resell is trade — and platforms report to the tax office under DAC7.

🔎 Common searches

What people search to land here:

“flexi job belgium how much”
“tax free side income belgium”
“article 17 work belgium”
“flexi job conditions”
“earn extra pension belgium”