Belgian fiduciaires and accounting firms have more software options than ever — but "best" depends entirely on which compliance requirements and infrastructure choices actually matter for your practice. Here's what to evaluate, and why full-stack compliance on dedicated infrastructure changes the calculation.
The compliance stack, in full
A genuinely complete Belgian accounting platform needs to handle four separate compliance systems correctly, not just one:
- Intervat — VAT declarations, prepared in the current official format for submission.
- DmfA — social security filings, correctly handling the joint committees your clients fall under, with proper contribution rates.
- Précompte professionnel — the payroll withholding tax return.
- Belcotax — annual tax fiche filings (281.10) in the required format.
Many platforms handle one or two of these well and treat the rest as an afterthought or manual export. Ask specifically about all four before assuming a platform is "compliant."
Infrastructure: shared platform vs dedicated instances
Most accounting SaaS platforms run on shared, multi-tenant cloud infrastructure — cost-efficient for the vendor, but your firm's client data sits logically separated (not physically isolated) from every other customer on the platform. Dedicated infrastructure — a separate Odoo instance, database and portal per client — is a meaningfully different security posture, particularly for firms handling sensitive financial and payroll data.
Questions worth asking any vendor
- Does it handle Intervat, DmfA, Précompte professionnel and Belcotax, or only some of them?
- Is infrastructure shared/multi-tenant, or dedicated per customer?
- Where is data legally hosted, and under which country's jurisdiction?
- Does automation replace the accountant's final review, or support it?
See the platform
The FiscFort Bundle handles the full Belgian compliance stack on dedicated, EU-hosted infrastructure — built for fiduciaires, not adapted from a generic template.