1. Check your right to live and work in Belgium

Before starting any freelance activity, confirm that your nationality and residence status allow self-employed work in Belgium. EU, EEA and Swiss nationals generally benefit from freedom of movement, but still need to complete local residence formalities. Non-EU nationals may need a professional card, residence permit or another authorisation before launching an independent activity.

2. Register with the municipality

If you settle in Belgium, you normally need to register with the municipality where you live. This registration can also be relevant for Belgian tax residency. Once you are considered a Belgian tax resident, Belgium may tax your worldwide income and may require reporting of foreign bank accounts, investments or other foreign income.

3. Obtain an enterprise number

Every self-employed person in Belgium needs an enterprise number registered with the Crossroads Bank for Enterprises. This number is your official business identification and is used with tax authorities, social security funds, banks, clients and other institutions.

When registering, you must identify your activity and establishment unit. If you register before you have a Belgian address, the initial registration may be linked to a foreign address and should be updated after moving to Belgium.

4. Activate your VAT number

Most freelancers must assess whether a Belgian VAT number is required. Under the normal VAT regime, you charge VAT where applicable, deduct VAT on qualifying professional expenses, file periodic VAT returns and need to submit an annual client listing.

VAT treatment depends on the type of service, client location and whether the client is a business or private individual. Freelancers with EU or non-EU clients should pay special attention to invoicing and reverse-charge rules.

5. Join a social security fund

Self-employed persons must affiliate with a Belgian social security fund. Contributions are due from the beginning of the quarter in which the self-employed activity starts, are usually paid quarterly and are tax deductible.

Because contributions are calculated based on professional income and may later be regularised, new freelancers should estimate income realistically and reserve sufficient cash throughout the year.

6. Join a health insurance fund

After joining a social security fund, you should also affiliate with a Belgian health insurance fund, known as a ‘mutualiteit’ or ‘mutuelle’. This allows reimbursement of eligible medical expenses. Additional hospitalisation insurance or guaranteed income insurance may also be useful because freelancers do not have the same employer-provided protection as employees.

7. Open a separate professional bank account

A dedicated professional bank account is recommended. It separates private and business payments, simplifies bookkeeping, supports VAT and tax compliance and helps demonstrate the professional character of expenses.

8. Organise bookkeeping and invoices

Good administration is essential. Keep sales invoices, purchase invoices, contracts, bank statements, expense receipts and VAT documents in an organised way. Correct invoices are particularly important for VAT deduction. A digital bookkeeping process is often the most efficient solution for expats who travel or work with international clients.

9. Understand deductible expenses

Belgian freelancers may deduct expenses linked to their professional activity. Common examples include accounting fees, software, IT equipment, mobile phone costs, internet, office furniture, training, professional memberships and certain travel costs.

Home office costs may also be deductible if part of the home is used professionally, but the professional portion should be reasonable and documented. Some expenses are only partly deductible, such as representation or car-related costs.

10. Plan for personal income tax and advance payments

A freelancer is generally taxed on net professional income: gross income minus social security contributions and deductible professional expenses. The net result is taxed through Belgian personal income tax at progressive rates.

Self-employed persons can make advance tax payments during the income year. There is no longer a tax increase for insufficient prepayments since tax year 2027.

11. Consider whether a company is appropriate

Not every freelancer should operate as a sole proprietor. In some cases, incorporating a Belgian company may be more efficient or commercially appropriate, for example for liability, income planning or long-term growth. A company also brings additional costs and formalities, including incorporation, accounting and annual accounts. The choice should be based on expected income, duration of stay, liability exposure and future mobility plans.

12. Build pension and income protection into the plan

Freelancers are responsible for additional financial protection. Belgium offers pension and insurance solutions for self-employed persons, including supplementary pension arrangements. These options may provide tax benefits, subject to conditions and limits.