The verdict in three sentences
A Brussels accounting or tax firm whose site really exists only in French, whose team pages display unchecked titles and whose client portal link breaks every other week should start its redesign before the next tax season. Typical Brussels agency quotes run roughly €10,000 to €35,000 for a trilingual redesign, while Kolonell's fixed grid is €2,700, €4,500 or €8,200, delivered in 3 to 4 weeks once content is ready. The budget matters less than controlling four risks: service page URLs, links to client tools, protected titles and consistency between language versions.
What signs show the redesign is due?
A firm based on Avenue Louise, in Ixelles, in Woluwe or near the European Quarter serves very different audiences: SMEs, self-employed professionals, liberal professions and expatriates from the institutions discovering Belgian tax. The site has to answer them in their language and on mobile. Typical signals:
- the Dutch or English version stops at the home page;
- service pages (VAT, personal income tax, company formation, bookkeeping for the self-employed) predate several reforms;
- clients email to ask where to log in to the portal or invoicing tool;
- the contact form invites tax documents as attachments or asks for the national register number;
- the CMS is no longer updated and nobody at the firm knows how to edit it.
How much does a redesign cost in Brussels in 2026?
2026 ballpark, based on typical agency quotes and public agency rate pages in Brussels. Orders of magnitude, not a survey.
| Item | Brussels agency | Freelancer | Kolonell |
|---|---|---|---|
| Compact site, one language | €6,000 to €12,000 | €2,000 to €5,000 | Starter, €2,700 |
| Full redesign, 20 to 30 pages, one language | €10,000 to €25,000 | €3,000 to €9,000 | Growth, €4,500 |
| Dutch and English versions | €3,000 to €10,000 extra | Often subcontracted, €2,000 to €6,000 | Premium, €8,200 (the multilingual tier, languages set in the quote) |
| Links to client portal and invoicing tool | Usually included | Usually included | Included as links |
| Real integration (single sign-on, sync, booking) | €5,000 and up | Variable | On quote |
| Stated timeline | 3 to 5 months | 1 to 3 months | 3 to 4 weeks, content ready |
| Post-launch support | Separate maintenance contract | Variable | 3 months included, then on quote |
Each Kolonell tier includes a project manager reachable in Belgian office hours, native English or French copywriting and 3 months of support. Details are on the international offer page.
What timeline and which risks should you plan for?
Avoid launching during the peak weeks of tax returns and year-end closings. A realistic timeline:
- Preparation (1 to 3 weeks, firm): URL inventory, up-to-date service list, bios, choice of languages.
- Week 1: site map and mockups, approved by a partner.
- Weeks 2 and 3: build, migration of service pages, language versions.
- Week 3: the firm reviews title mentions, marketing claims and the privacy notice.
- Week 4: 301 redirects, launch, Search Console checks.
| Risk | Brussels example | Mitigation | Who signs off |
|---|---|---|---|
| Traffic loss on service pages | A personal income tax Brussels page returns a 404 | URL inventory, 301 map per language, 6 to 8 weeks of Search Console monitoring | Project manager |
| Broken portal or invoicing links | Clients can no longer find their login | List of external links tested before and after the switch | IT lead |
| Protected titles | A team member presented as a chartered accountant without holding the title | Check each title with the person concerned, in line with ITAA rules | Partner |
| Misaligned versions | A service listed in French, missing in Dutch | Page-by-language matrix reviewed before launch | Marketing |
| Intrusive forms | Asking for the national register number | Name, email, phone, type of need, preferred language | Privacy lead |
| Marketing claims | Guaranteed tax savings | Remove any promise of results | Partner |
| Downtime | DNS switch on a busy Monday | TTL lowered 48 hours ahead, launch on a quiet day | Project manager |
On data, the GDPR applies, supervised by the Data Protection Authority (APD/GBA): clear purpose, minimal data, retention period, privacy notice and cookie consent. This is not legal advice.
What should you ask the provider, and when is a local agency better?
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Useful questions:
- Does the 301 redirect map cover every language version?
- Who translates, and who reviews tax terminology in Dutch?
- Are the domain, hosting and analytics in the firm's name?
- What happens after the 3 months of support?
A Brussels agency remains the better choice if you want regular in-person meetings, a team of native tax writers in all three languages, deep integration with your practice management software, or if your own purchasing policy requires a supplier established in Belgium. For a well-scoped public site, a fixed grid is faster and more predictable.
Mini case study
Illustrative example: Sophie Vermeulen is a partner at a hypothetical nine-person accounting and tax firm in Ixelles serving SMEs, self-employed clients and expatriates from the EU institutions. The site has 28 pages in French with a partial Dutch version. The same reasoning applies to an English-speaking founder running a small firm in Brussels.
- Local agency quote: €21,000 plus €6,000 for translation, €27,000 in total.
- Kolonell Premium (the multilingual tier, French, Dutch and English set in the quote): €8,200.
- Freelance native Dutch reviewer for tax terminology: about €700 (third-party cost).
- Total: €8,900, which is €18,100 less than the local quote.
Internal time: 28 pages × 3 languages = 84 pages to review, at about 15 minutes each, so 1,260 minutes or 21 hours of partner and staff time, to plan over two weeks.
FAQ
How much does an accounting firm website redesign cost in Brussels? Typical local agency quotes range from about €10,000 to €35,000 depending on languages. With Kolonell: €2,700, €4,500 or €8,200 depending on the tier.
How long does the redesign take? 3 to 4 weeks of production once content is ready, after 1 to 3 weeks of preparation by the firm. Avoid peak tax weeks for the launch.
Does the site need three languages? It is not a general legal requirement, but in Brussels clients often expect it. The Premium tier at €8,200 covers multilingual sites, languages set in the quote.
Can the client portal be integrated into the site? A clear link is included in every tier. A real integration with single sign-on or sync is on quote and often exceeds €5,000 with local agencies.
How should team titles be presented? Use accountant or tax adviser titles only for people who hold them. Check every profile before launch: it is one of the 7 risks in the table.
Let's scope your project. Tell us your page count, the languages you need and the client tools to link, and we will confirm the tier, budget and 3 to 4 week delivery. See the international offer or request a free quote: detailed reply within 48 hours.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
