Tax & Accounting

Your accounting firm from day one and throughout your growth, backed by our Finance team when your needs evolve.

Book a meeting Our services

Our strengths

An accounting firm backed by a financial consulting group

Accounting, VAT, corporate tax and specialised assignments for SMEs, scale-ups and Belgian subsidiaries of international groups.

01

Odoo and digital tools

Odoo Silver accounting partner: all our accountants are trained and we handle migrations. We also work with Horus, or adapt to your existing tools.

02

Continuity

We support you from incorporation through every stage of your growth: new obligations, reporting, consolidation. When your needs go beyond accounting, Altesia’s Finance team complements our services.

03

Personal support

A single point of contact manages your file and a supervisor keeps the overall view. Meet us in La Hulpe, in Namur or on Teams, for quick answers.

Who we work with

Our clients

SMEs and family businesses

Your figures during the year, not just at closing

Accounting, VAT, taxes and legal obligations. On Odoo or Horus: we adapt to your tool.

Start-ups, spin-offs and biotechs

Your investors and grants require reporting

Incorporation, financial plan, DGO6 claim declarations, R&D withholding tax, tax credit, stock options: we know the obligations of innovative companies.

SMEs moving to Odoo

Changing software often means changing accountant

Running sales software, Excel and accounting software side by side? As an Odoo Silver partner, we handle your migration to Odoo, to end double data entry and give you more visibility on your figures.

Subsidiaries of international groups

A local accounting firm sized for your subsidiary

We handle your monthly or quarterly group reporting, relations with the auditor, your consolidated accounts and NBB filings. Our team combines expertise and accessibility.

Freelancer or management company? We offer a service suited to your situation.

Discover VIP Conseil ▶

Our services

From day-to-day accounting to specialised assignments

Full accounting

  • Bookkeeping through to year-end closing
  • Cost accounting
  • Interim reporting
  • Supervision of your in-house accountants
  • VAT and corporate tax

Tax advice

  • Compliance for all your tax returns
  • Representation before the tax authorities
  • Advice on demand, especially at closing

Specialised assignments

  • Company incorporation and financial plan
  • DGO6 claim declarations
  • R&D withholding tax and contribution reductions
  • Grant research, stock options
  • Consolidated accounts and NBB filings
  • Accounting migration to Odoo

Financial support

Always by your side as your finance grows

As your needs grow, you can also call on Altesia Finance profiles. Your accounting team stays in place and works hand in hand with the Finance consultants: it ensures continuity of service and keeps the history of your file. At every stage, you build the team you need, without hiring a full-time employee for each role.

Your finance team, step by step

Early stage
T&A accounting

Accounting, VAT, taxes and financial plan

Growth
T&A accounting
Accountant1/2
Expansion
T&A accounting
Accountant1
Controller1/2
CFO1/4
And beyond

Indicative examples in full-time equivalent. Each team is built around your needs, from 1 to 5 days a week.

Discover our staffing offer ▶

Client case

A fast-growing SME moves from a Finance assignment to a complete solution with Tax & Accounting

« Moving to a complete solution with Altesia Tax & Accounting was a natural and efficient step. »

Read the full case ▶

The challenge: the client wanted to strengthen its financial control. Its external accounting firm was not keeping the books properly, and management lacked the visibility to make timely decisions.

Altesia Finance first took over financial management, then identified the gaps in the outsourced accounting.

Altesia Tax & Accounting then took over the file from the previous accounting firm, without disrupting operations. Processes are clearer and accounting follows operational priorities.

Contact

Let’s talk about your situation

A first conversation to understand your situation: changing accounting firm, Odoo migration, incorporation or growth.

Offices in La Hulpe and Namur.

Mini-diagnostic

Is your finance keeping up with your growth?

A lighter version of our Finance function diagnostic: an afternoon workshop with your team, followed by a report and a clear roadmap.

Request a mini-diagnostic ▶See the full diagnostic