Tax · Personal income tax 2026
Personal income tax for the self-employed in 2026: scale, calculation and marginal rate
The 2026 Belgian personal income tax scale, its 4 bands and the effect of municipal surcharges, with a worked example and the 4 levers for reducing your tax.
Updated on
By the Finances Indépendants editorial team
What is personal income tax for the self-employed?
Personal income tax (IPP/PB, Impôt des Personnes Physiques) is the main tax paid by every Belgian resident on their professional, movable, property and miscellaneous income. For a self-employed person trading as a natural person, personal income tax applies to net taxable income = turnover minus business expenses minus NISSE (INASTI/RSVZ) social security contributions.
Personal income tax follows a progressive scale: the higher your income, the higher the rate on the top band (up to 50%). It comes on top of social security contributions (≈ 20.5%), which in practice form a second 'layer' of tax in the broad sense.
Personal income tax scale 2026 (2025 income)
The 2026 personal income tax scale has four bands. Each band is taxed at the rate shown, and only the part above the lower limit is taxed at the next rate: this is the principle of progressivity.
From
To
Personal income tax rate
Band 1
€0
€16,320
25%
Band 2
€16,320
€28,800
40%
Band 3
€28,800
€49,840
45%
Band 4
€49,840
Above
50%
On top of these bands comes the tax-free allowance (~€10,910 in 2026), which is effectively 'given back' to every taxpayer.
Municipal surcharges: the real impact
In Belgium, personal income tax is increased by municipal surcharges, a percentage applied by your municipality on top of federal personal income tax. The national average is around 7.5%, but the difference between municipalities is significant: 0% in Knokke-Heist, up to 9% in Brussels, Etterbeek or Schaerbeek.
In practice, for a self-employed person with €30,000 of federal personal income tax, living in a municipality at 9% instead of 7% costs an extra €600 a year. Over 30 years, the cumulative difference amounts to a significant loss of pension capital.
Detailed worked example: self-employed person on €50,000 net
For a self-employed person trading as a natural person with €50,000 of net taxable income (after NISSE contributions and business expenses), 2026 federal personal income tax is calculated as follows:
Net taxable income of €50,000, minus the tax-free allowance of €10,910, gives a taxable base of €39,090.
- from €0 to €16,320€16,320 × 25%€4,080.00
- from €16,320 to €28,800€12,480 × 40%€4,992.00
- from €28,800 to €39,090€10,290 × 45%€4,630.50
- Federal personal income tax
- €13,702.50
- Municipal surcharge (7.5%)
- €1,027.69
- Total personal income tax
- €14,730.19
- Marginal rate, on the next euro earned
- 45%
- Average rate, on your whole income
- 29.5%
Note: the actual calculation also includes tax reductions (pension savings, service vouchers, donations), which can reduce the final total by several hundred to several thousand euros depending on your profile.
How to reduce your personal income tax: the key deductions
Four main levers let a self-employed person in Belgium reduce their personal income tax significantly and legally, without aggressive tax planning.
- PLCI/VAPZ (free supplementary pension for the self-employed), premium 100% deductible as a business expense, up to €4,086.34 (standard) or €4,701.54 (social). See the PLCI guide.
- Actual expenses: above roughly €15,000/year of documented expenses, switch from the flat-rate allowance to actual expenses. See deductible expenses.
- Standard pension savings, around €990 in 2026, with a 30% tax reduction.
- Advance tax payments, to avoid the statutory surcharge of around 6% applied when nothing is paid before the deadlines.
Marginal rate vs average rate: don't confuse them
The marginal rate is the rate applied to your next euro of income. The average rate is your total personal income tax divided by your net income. This distinction is crucial for correctly assessing the value of a deduction.
For example, for a self-employed person on €80,000 net: marginal rate 50% (53.75% with municipal surcharges), average rate ~36%. A €4,000 deduction through the PLCI/VAPZ saves you 4,000 × 53.75% ≈ €2,150, not 4,000 × 36% ≈ €1,440. It is the marginal rate that counts when assessing a tax-saving lever.
Sources
- FPS Finance, Personal income tax scale, tax year 2026 (2025 income). View (new tab)(Official source, 2026)
- Income Tax Code 1992, Articles 130 to 148 CIR, tax scale and calculation. View (new tab)(Official source, 2025)
- NISSE (INASTI/RSVZ), Social security contributions 2026, professional income calculation base. View (new tab)(Official source, 2026)
Key personal income tax figures 2026
Personal income tax for the self-employed in a few numbers
- 50%
Federal marginal personal income tax rate (above €49,840)
FPS Finance · 2026
- 53.75%
Effective marginal rate (7.5% surcharges included)
FPS Finance · 2026
- €10,910
Tax-free allowance 2026
Income Tax Code · 2026
Personal income tax FAQ
Frequently asked questions about personal income tax for the self-employed
The 2026 personal income tax scale (tax year 2026, 2025 income) has 4 bands: 25% up to €16,320, 40% between €16,320 and €28,800, 45% between €28,800 and €49,840, and 50% above that. On top of this come municipal surcharges (≈ 7.5% on average, up to 9% in Brussels).
You start from turnover excluding VAT, deduct business expenses (flat-rate or actual) and NISSE social security contributions to arrive at net taxable income. The personal allowance (~€10,910) is then applied, followed by the progressive scale. The total is increased by municipal surcharges.
It is the basic personal allowance, around €10,910 in 2026. This first slice of income is not taxed. The allowance is increased for dependants (children, a spouse with no income).
Municipal surcharges range from 0% (Knokke-Heist) to 9% (Brussels, Etterbeek, Schaerbeek). For a self-employed person with €30,000 of personal income tax, choosing a municipality at 7% rather than 9% saves around €600 a year.
The marginal rate is the rate applied to the next euro earned (50% above €49,840). The average rate is total personal income tax divided by net income. For a self-employed person on €60,000, the marginal rate is 50% but the average rate is around 33-37%, thanks to the lower bands and the tax-free allowance.
Four main levers: pay into a PLCI/VAPZ (100% deductible), opt for actual expenses above ~€15,000 of expenses/year, deduct standard pension savings (~€990 in 2026), and make advance tax payments to avoid the ~6% surcharge.
Yes. Every self-employed person registered with the Crossroads Bank for Enterprises (CBE) must file a personal income tax return, even if they made a loss or broke even. The loss can be carried forward against professional income for the following 7 years (without limitation since 2018).
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