As the deadline for receiving (September 2026) and then issuing electronic invoices approaches, all French companies must anticipate their compliance.
But for an SME of 5 to 30 M€ in revenue, the question is simple :
Which audit to carry out? And how much does it really cost?
On the market, offers range from 5,000 to over 50,000 €, with very heterogeneous content.
At Advanced Conseil, we have developed a clear, comprehensive, and pragmatic approach, perfectly suited for SMEs — and billed at less than €10K.
This article explains :
- what a serious audit should contain,
- why some approaches cost much more,
- and what must absolutely be delivered to calmly anticipate the 2026 reform.
The objective of an electronic invoicing audit
A compliance audit must answer a single question :
👉 Is your company ready for the 2026 reform? If not, what is missing?
To do this, it is necessary to analyze three fundamental blocks :
- Your organization (order-to-cash / finance / accounting processes)
- Your information system (ERP, CRM, business tools, API)
- Your level of regulatory compliance (formats, flows, security)
An effective audit must provide :
✔ a clear view of the existing situation,
✔ a precise identification of gaps,
✔ a complete, prioritized, and realistic action plan,
✔ a recommendation on the Approved Platform (PA),
✔ a target e-invoicing architecture.
Without these elements, the SME navigates blindly, which leads to risks of :
- invoice rejections,
- payment delays,
- ERP integration cost overruns,
- poor internal coordination.
What a mission under €10K must absolutely contain
Here are the 6 essential blocks that any serious audit mission must cover.
Detailed analysis of billing flows
Client side:
- Invoice generation (ERP, CRM, business software…)
- Internal controls
- Validation circuits
- Current format (PDF, EDI, Factur-X…)
- Sending process
On the supplier side:
- Reception (email, supplier portal, EDI, PDF)
- Extraction
- Expense validation
- Internal workflow
- Accounting integration
🎯 Objective: understand exactly how information flows.
Complete mapping of the information system
Your audit must clearly identify:
- ERP (Odoo, Cegid, Sage, SAP B1, Divalto…)
- CRM
- Specific business software
- Purchasing / Expense Software
- Accounting
- Treasury
- API / connectors
- Possible use of intermediate Excel files
🎯 Objective: identify breakpoints and duplicate entries.
Regulatory compliance analysis
Does your company already comply with some of the constraints?
Mandatory analysis:
- existing formats
- transmission circuits
- status management
- archiving
- traceability
- security
- asset management
- TVA transmission (e-reporting)
🎯 Objective: measure the gaps in relation to the reform.
Comparison & recommendation Approved Platform (PA)
A serious audit must include :
- a shortlist of 2 to 4 PAs suitable for your SME,
- an objective comparison on 15–20 criteria :
ERP compatibility, volume, API, workflow, price, e-reporting, UX… - a reasoned recommendation.
🎯 Objective: avoid making choices that could cost tens of thousands of euros.
Target architecture e-invoicing / e-reporting
Visual document (PDF + diagram) including :
- future flows
- interactions between ERP, CRM, accounting, PA
- internal roles
- validation rules
- typical scenarios
🎯 Objective: provide teams with a clear vision of the "post-2026" period.
Structured roadmap 2024 → 2026
A complete mission must include :
- list of actions to be taken
- priorities
- complexity
- necessary resources
- recommended planning
- budget estimate
🎯 Objective: know what to do, in what order, and with what investment.
This is exactly what we offer you at Advanced Conseil
Why do some audits cost 20–50K€ ?
3 main reasons :
❌ 1. Deliverables too complex
Some firms deliver audits of 80 pages, not very usable, expensive to produce.
❌ 2. Gain sought after commercial
Audit used as a "gateway" to sell an expensive integration.
❌ 3. Too technical an approach
Exclusive focus on technology → not suitable for SMEs.
👉 Résultat : la PME paie pour de la complexité inutile.
What a SME does not need to pay
A mission < 10K€ must not include :
- development of connectors
- ERP configuration
- data migration
- configuration of the PA
- cross-cutting projects outside the scope
These are separate projects.
The audit must remain:
➡ strategic
➡ readable
➡ concrete
➡ action-oriented
Why do SMEs with 5–30 M€ need an audit?
This segment will undergo the most transformations because:
✔ large volumes
✔ multiple teams involved
✔ ERP already in place
✔ complex flows
✔ cash flow pressures
✔ multiple sites / multiple companies
Not anticipating = risk of operational disruption.
Audit significantly reduces risk while optimizing processes.
How Advanced Conseil conducts a complete audit < 10K€
We have designed a simple, effective, and SME-adapted methodology:
✔ 1. Meetings with ADV / Accounting / Finance / IT
✔ 2. Analysis of existing flows
✔ 3. Mapping of the information system
✔ 4. Complete regulatory analysis
✔ 5. Comparison & Recommendation PA
✔ 6. Architecture cible e-invoicing
✔ 7. Feuille de route 2024–2026
✔ 8. Restitution (1h30) with decision-makers
Our commitments:
- no hidden software sales,
- no unnecessary jargon,
- clear deliverables,
- expert accounting support + CFO.
Flat rate cost: < 10,000 €
Need an audit for your company?
Leave us your contact details
Advanced Conseil conducts electronic invoicing compliance audits for SMEs.
Request your free
diagnosis — Response within 48h.
→ Electronic invoicing compliance for SMEs
→ Choose your PDP 2026: comparison and criteria
→ Electronic invoicing configuration Odoo 2026