Omnivat Consulting

What Omnivat Consulting does

OmniVAT Consulting sprl is a privately held Belgian professional services firm headquartered at Avenue de l'Opale 120, 1030 Brussels (Schaarbeek), specializing exclusively in indirect taxation: value-added tax (VAT), customs, and excise matters. Founded in January 2011 by Katia Delfin Diaz, a chartered VAT practitioner with prior tenure at Big 4 firms (1993-2001) and VAT House (2001-2010), the firm serves companies of varying sizes — including Belgian SMEs, multinationals, foreign companies needing Belgian or EU VAT representation, and public/non-profit entities. The operating geographies formally served are Belgium and all 28 EU Member States for cross-border VAT registration, representation, and compliance mandates.

The firm's core service portfolio comprises four professional service lines: Consultancy (VAT contract analyses, structuring, optimization, and assistance with tax audits), Compliance (preparation of sales/purchases ledgers, periodic and annual returns, European Sales Listings, Intrastat returns, and foreign VAT refunds), VAT and Customs Audit (internal reviews to identify discrepancies and optimization opportunities), and Tax Representation and Direct VAT Identification (registration and fiscal representation in Belgium and across the EU). Two supplementary offerings — VAT Academy seminars and two authored reference books published by Anthémis — provide educational and thought-leadership surfaces that feed the advisory practice. There is no proprietary software product, API, or technology platform; deliverables are produced by consultants and billed on an hourly basis.

The revenue model is a classic professional services engagement model. Clients are acquired through professional referrals, industry associations, and direct engagement via the firm website. Fees are charged on an hourly basis, with rates varying by consultant seniority and matter complexity; pass-through charges may apply for translation, travel in Belgium and abroad, and express courier services. Payment terms are ten days after invoice receipt, and all prices exclude VAT. The firm is recognized by the Belgian Institute of Chartered Accountants and Tax Advisers (IEC/IAB, now ITAA) and holds associate-partner status with VAT Forum and VAT Academy. The company has no disclosed parent entity, no subsidiaries, no external investors, and has not raised any funding rounds since inception.

Name

Omnivat Consulting

Legal name

Omnivat Consulting sprl

Website

https://omnivat.be

Company type

Private

Founded year

2011

Operating status

Operating

Short description

OmniVAT Consulting is a Brussels-based independent VAT, customs, and excise advisory firm serving Belgian and EU companies, including multinationals and foreign businesses requiring EU VAT registration and representation, founded in 2011 by a senior chartered VAT practitioner.

Ownership category

akta.pro rank

Product category

Tax Advisory Services

NAICS

Other Management Consulting Services (541618), Management Consulting Services (54161)

SIC

Services-Management Consulting Services (8742)

akta.pro industry

PRIMARYBPAHAJAF

EHS Management Systems & ISO Consulting (ISO 14001/45001)

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Environmental, Health & Safety (EHS) Consulting

Keywords

• VAT advisory services
• Indirect tax consulting
• Customs compliance
• Excise duty advisory
• EU VAT registration

Headquarters

HQ city

Brussels

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Consulting Services: Hourly-based professional consulting fees for VAT, customs, and excise advisory services. Rates vary based on consultant experience level and complexity of the matter. Additional charges may apply for translation costs, travel expenses in Belgium and abroad, and express courier fees.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

OmniVAT Consulting is a Brussels-based professional advisory firm specializing exclusively in VAT, customs, and excise matters. It provides VAT consultancy (contract analysis, structuring, and legal optimization), VAT compliance (returns, European Sales Listings, Intrastat filings, foreign VAT refunds), VAT and customs audits, and tax representation / direct VAT identification across Belgium and the 28 EU Member States. Services are billed on an hourly consulting-fee basis and delivered directly to businesses.

Product overview

Omnivat Consulting is a VAT and customs consulting firm offering advisory and compliance services across Belgium and the European Union. The company provides a portfolio of professional services including Consultancy (VAT advice and optimization), Compliance (VAT return filing, declarations, ledgers), VAT and Customs Audit, and Tax Representation services. These core service offerings are complemented by educational seminars through the VAT Academy and published technical guides on VAT matters. The firm specializes in serving companies operating internationally within the EU.

Differentiator

Problem solved

Functional benefit

Products and services

• Consultancy VAT consultancy covering contract analyses, purchasing/sales structuring, and VAT optimization, including assistance with tax audits conducted by Belgian authorities. Targeted at companies with operations in Belgium and the EU.
• Compliance VAT compliance services including preparation of sales and purchases ledgers, regular and annual VAT returns, European Sales Listings, Intrastat returns, and foreign VAT refunds for EU and non-EU companies.
• VAT and Customs Audit Internal VAT and customs audit services designed to identify discrepancies, clarify business activities, and uncover optimization opportunities for companies.
• Tax Representation and Direct VAT Identification VAT registration and tax representation services for foreign companies in Belgium and Belgian companies abroad, including assistance with VAT identification across the 28 EU Member States.
• VAT Academy Seminars

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Three partnerships are on record, tiered minor and core.

• VAT AcademyminorStrategic or Co-development PartnerCollaboration with VAT Academy for organizing and delivering seminars, conferences, and workshops on VAT, customs, and excise matters. The firm contributes expertise to professional education in indirect taxation.
• VAT ForumminorStrategic or Co-development PartnerAssociate partner of VAT Forum, a professional network for VAT specialists providing knowledge sharing and professional development opportunities.
• IEC/IAB (Institute of Chartered Accountants and Tax Advisers)coreOthersRecognized by the Belgian Institute of chartered accountants and tax advisers. Provides professional credibility and network within the Belgian tax advisory profession.

Scale indicators2 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Mazars Belgium: International accounting and advisory firm with a tax practice serving Belgian and foreign clients on VAT registration, compliance and cross-border matters. Comparable mid-market positioning.
• KPMG Belgium (Tax Practice): Big 4 firm offering comprehensive VAT, customs and excise advisory in Belgium and across EU member states. Competes for cross-border VAT mandates but as part of a much broader advisory portfolio.
• PwC Belgium (Tax): Big 4 firm providing VAT compliance, registration and advisory services for Belgian and international companies. Comparable service mix with much larger scale and brand reach.
• Stibbe (Tax Practice): Leading Benelux law firm with a tax practice advising on VAT, customs and excise for Belgian and international corporate clients. Comparable cross-border VAT advisory capability with broader legal service portfolio.
• BDO Belgium: Mid-tier international accounting and advisory firm offering VAT compliance and advisory in Belgium and internationally. Comparable service scope for SMEs and mid-market cross-border clients.
• Loyens & Loeff: Benelux-headquartered law and tax advisory firm with a strong indirect tax practice advising multinationals on EU VAT, customs and excise. Comparable cross-border VAT expertise at greater scale.
• EY Belgium (Indirect Tax): Big 4 firm with an established indirect tax practice covering VAT, customs and excise across the EU. Competes for the same cross-border VAT representation and compliance engagements.
• Deloitte Belgium (Tax & Legal): Big 4 firm with a dedicated indirect tax practice serving multinational clients on Belgian and EU VAT compliance, representation and advisory. Overlaps directly with OmniVAT's service lines.

Direct peers

• VAT House: Belgian VAT-specialist advisory firm where founder Katia Delfin Diaz previously worked (2001-2010). Most directly comparable peer given identical niche focus on Belgian and international VAT, customs and excise advisory.
• Tiberghien: Belgian independent tax law firm with a strong indirect tax (VAT, customs, excise) practice serving Belgian and international clients. Comparable boutique specialist positioning with deep Belgian VAT expertise.

Market position

Competitive moat3 records

Customer concentration

• Xtwitter.com/KatiaDelfinDiaz
• Facebookfr-fr.facebook.com/omnivat
• LinkedInlinkedin.com/company/omnivat-consulting

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Omnivat Consulting