Construction Accounting Firm France

What the Service Delivers

A construction accounting firm France combines standard French bookkeeping with the items that recur in bâtiment and travaux publics (BTP). The work covers long-cycle project costing, work-in-progress recognition (méthode de l’avancement vs méthode de l’achèvement), retention (retenue de garantie), reverse-charge VAT on vendor invoices, Convention Collective BTP payroll, sector paid leave through the Caisses CIBTP, and travailleurs détachés declarations.

A generalist partner handles the ledger. A specialist with construction industry experience handles the items that determine margin — project costing, percentage-of-progress entries, retention timing, vendor VAT mechanics, and the cash flow rhythm of every business on French sites.

The service scope typically includes:

• Project-based bookkeeping under the Plan Comptable Général, with segmentation by site, project, sub-project and phase, supporting detailed analysis at job level
• Work-in-progress — avancement or achèvement, including milestone billing, retentions, accrued income and forecasting of remaining-to-complete
• Reverse-charge VAT (autoliquidation TVA) on vendor invoices under Article 283, 2 nonies of the Code général des impôts, with the mention obligatoire and the related entries
• Convention Collective BTP payroll — sector pay scales, premiums, intempéries, paniers and trajets
• Caisses CIBTP affiliation — paid leave and bad-weather indemnity collected sector-wide rather than through the employer’s own balance sheet
• Travailleurs détachés declarations for cross-border subcontracted labour and labor, including SIPSI filings before the start of any job
• Corporate tax and VAT returns, including periodic VAT refund claims where the entity runs a structurally recoverable position
• Garantie décennale insurance coordination — disclosure of the mandatory ten-year guarantee
• Statutory review interface with the commissaire aux comptes where thresholds are met
• Vendor compliance and attestations — URSSAF, vigilance, travailleurs détachés, retention of vendor records and regular six-month checks
• Management reports for owners and operators — site performance, project profitability, labor cost, position, and budget vs. actual

Industries Served Within the Sector

The construction industry covers a wide variety of trades, organization forms and operator profiles. Our typical client mix spans this variety of businesses:

• Independent builders — gros œuvre, second œuvre, menuiserie, plomberie, électricité, peinture — each trade with its pay scale and convention
• Civil engineering and infrastructure — roadworks, public works, water and sewerage, telecoms, government and marchés publics operators
• Multi-site groups — consolidated reporting across regions, with central project control and a holding-and-subsidiary organization
• Real estate developers and marchands de biens — combining site activity with real estate trading, where inventory, work-in-progress and VAT treatment interact
• Residential developers — single-family housing and small residential developers
• Foreign groups in France under travailleurs détachés or French establishment, requiring sector-aligned bookkeeping and CIBTP administration
• Specialist sub-contractors — managing reverse-charge VAT on invoices to main operators
• Site services and facilities operators — maintenance contractors, technical services, energy-efficiency retrofit, an emerging field
• Real estate funds — investment vehicles holding asset portfolios, including SCI and LLC-equivalent structures, where the legal form drives accounts; some are organised as a société civile LLC-type vehicle, others through a third-party LLP holding investments offshore

For each profile, the engagement combines daily project work with the periodic filing cycle — VAT, impôt sur les sociétés, Greffe du Tribunal de Commerce filings, and statutory review where applicable. Our relationships with clients are long-term, with a stable team and the same advisor in place year after year. Industry leaders need leader-grade advisors: stable, experienced people who serve a similar client base. A leader in this field expects continuity, and another leader-led practice can rarely replicate institutional memory once it has been lost. We help build strong client relationships and lasting professional relationships with founders, CFOs and trade leaders.

In France vs. Internationally

Building activity in France differs from common practice in many other countries on five points that recur in every cross-border engagement:

The practical consequence for international groups: a generalist provider without sector experience will often misstate VAT (under-collected reverse-charge), misclassify CIBTP contributions and apply the wrong revenue recognition. A specialized firm corrects these issues at source. Our internal experience with cross-border engagements helps ensure that every transaction is recorded correctly in both jurisdictions, and that the data flowing into the French books matches the parent’s data in the home jurisdiction.

Industry Overview: Leading Firms Across Markets

Foreign owners researching the French BTP sector often arrive having worked with international networks in their home market. A short overview of the wider profession helps frame the conversation:

• In the United States, mid-market site operators are often served by national networks such as RSM US, BDO USA, CLA (CliftonLarsonAllen), Moss Adams, Crowe, EisnerAmper and Grant Thornton, alongside Baker Tilly US LLP for the upper mid-market
• In the United Kingdom and Italy, BDO and Grant Thornton, together with the Baker Tilly network and Crowe Global, cover most cross-border site work; in France, Interexco operates independently of these networks while engaging with them on cross-border files
• Comparable players in continental Europe — RSM Italy, BDO Italia, Crowe Italy, Grant Thornton Italy — are the typical counterparts on Italian-French BTP files
• The CCIFP (Chambre de Commerce et d’Industrie Française en Pologne) and other bilateral chambers regularly publish a sector overview for cross-border investors entering French BTP

We engage with the relevant key counterparts at each firm when an engagement requires it, and we are happy to coordinate with an incumbent advisor where the owner prefers continuity on the home-country side. Cross-referencing the home-jurisdiction view at https://oec.fr/ with the French statutory framework helps the lead partner reconcile expectations from day one. Each market has its leader; together they form the comparison base any foreign group uses when choosing a French partner.

Why It Matters: French Regulatory Landscape

Building activity is one of the most regulated sectors of the French economy. Our work involves a regulatory landscape with several named authorities:

• OEC (Ordre des Experts-Comptables) — the professional body regulating chartered accountants; only firms registered with the OEC may sign French statutory accounts
• CNCC (Compagnie Nationale des Commissaires aux Comptes) — regulates the statutory auditor profession and issues the normes d’exercice professionnel
• DGFiP (Direction Générale des Finances Publiques) — administers corporate tax, VAT and the Code général des impôts, including the reverse-charge mechanism
• URSSAF — collects social security contributions and issues the attestations de vigilance that every main contractor must obtain on each vendor every six months
• Caisses CIBTP — sector-wide for paid leave and bad weather, mandatory for bâtiment and travaux publics employers; the CIBTP scheme is governed by sector-specific law applicable to BTP only
• ANC (Autorité des Normes Comptables) — French GAAP, including rules on contrats à long terme
• Greffe du Tribunal de Commerce — registry for annual filings and corporate changes
• Code du travail — travailleurs détachés and SIPSI rules for posted workers
• Code de commerce — corporate law, including statutory review obligations
• AMF (Autorité des Marchés Financiers) — for groups with listed bonds or shares
• AGIRC-ARRCO — supplementary pension scheme contributions, applicable to BTP employees

A verifiable benchmark: the standard French corporate income tax rate is 25% (DGFiP, 2025), with the reduced 15% rate available on the first €42,500 of taxable profit for SMEs meeting the qualifying conditions. Statutory audit thresholds were raised by Décret n° 2024-152 of 28 February 2024 (transposing EU Directive 2023/2775) to balance sheet ≥ €5 m, turnover ≥ €10 m, and ≥ 50 employees on two consecutive financial years — a change that removed several mid-size builders from the statutory perimeter.

Our role is to keep the entity financially compliant across this landscape every month, every quarter and every year-end. Knowing the relevant laws and applying them precisely is essential to the daily work, and the rules governing each engagement form part of the standing brief of the lead partner.

Industry Issues That Shape the Engagement

Issues that recur in every engagement involve:

• Cash flow timing — long projects, milestone billing, retention release, and vendor payment terms create the cycle that determines whether a builder is financially sound or financially fragile; cash is reviewed weekly in any complex multi-project business, helping management focus on the next thirty days
• Project margin tracking — every project has a margin that must be tracked from quotation through close-out; overruns identified late are margin lost
• Reverse-charge VAT — the subcontractor invoices excluding VAT; a single mis-coded vendor invoice can create a reassessment on both parties and is difficult to unwind later
• Retention release — the retenue de garantie (typically 5%) is released only on parfait achèvement one year after delivery; tracking by project is a recurring source of receivable challenges
• Fraud risk — fictitious vendor invoices, ghost subcontractors and inflated cost-plus billing are recurring patterns; an internal control plan reduces fraud exposure
• Vendor compliance — every six months, the main contractor must obtain a fresh attestation de vigilance and (where relevant) travailleurs détachés documents from each vendor; we maintain the vendor file and a structured internal routine
• Insurance and bonding — garantie décennale, biennale, parfait achèvement and surety bonding (caution) are conditions of operating; partner banks require periodic certificates; partner banks reviewing bonding lines expect documented evidence

A specialist team with experience addresses these challenges inside the monthly cycle rather than at year-end, helping owners manage exposure effectively and ensuring no item slips through. The insights generated by regular checks are central to better decision-making and to the health of the company.

Project Method and Site-Level Reporting

Project work is the operational backbone of every engagement. We deliver four routines designed to serve operations as well as the finance function:

1. Costing and budget tracking — each project carries a budget, a quote-to-completion forecast, a cost-to-date ledger and a margin position updated monthly; detailed analysis helps managers identify deviation early and trigger corrective steps by site leaders
2. Income recognition — under French GAAP the avancement approach aligns sales with progress where contract terms and remaining-to-complete estimates meet defined conditions; otherwise the achèvement approach applies and sales are recognised only on close-out
3. Cash forecasting — the BTP cycle is unique: large outflows up front, milestone receipts spread across the project, retention held by the customer until parfait achèvement; forecasting at project and group level helps owners and lenders fund the months ahead and align vendor payment timelines
4. Site-level information — site supervisors receive information that translates the ledger into the language of the site: labor and labour cost vs. quote, materials versus budget, equipment utilisation, and percentage progress against schedule

Each engagement is calibrated to the entity’s size, structure and statement requirements — from the independent operator with a single legal form to the multi-site group with consolidated statements across France and abroad. The ledger feeds the dashboards; the dashboards feed the dialogue with banks, investors and partners. Performance information is circulated monthly; insights are summarised in a quarterly review with the partner in charge.

French Sector-Specific Tax and Compliance Points

Four items recur in every engagement in France and shape the financial statements every year:

• Reverse-charge VAT (autoliquidation) — for building services supplied between professionals, the subcontractor invoices excluding VAT and the main contractor self-assesses VAT under the reverse-charge mechanism; misapplication is a recurring source of fee-related disputes in the industry
• Caisses CIBTP — sector-wide caisses collect paid leave and bad-weather indemnity contributions and pay employees directly during their leave or intempéries; affiliation is mandatory, contribution rates differ from the general regime, and the rules applicable to this regime are specific to BTP
• Work-in-progress recognition — French GAAP allows the avancement approach for contracts meeting defined conditions and the achèvement approach otherwise; the choice and consistency affect income timing and corporate tax timing
• Garantie décennale — mandatory ten-year guarantee with associated insurance, requiring disclosure in financial statements and consideration in any acquisition, merger or disposal

These items shape the statements every year — not just at project close — and define the sustained advisor role of a specialized team. The variety of items in scope and the variety of vendor profiles met on each engagement make a sector-aligned solution far safer than a generic ledger. A practical solution combines disciplined monthly close with site-level reporting; the organization that produces it must reflect the operator’s own organization and its multi-site organization model.

Transactions: Acquisition, Merger, Succession

Industry transactions follow a recognisable pattern: family-owned builders selling to private equity or trade buyers; multi-site groups acquiring regional contractors; foreign developers entering the French market through a French subsidiary; second-generation succession inside long-established trades. Each transaction raises specific points for the future of the business:

• Acquisition — work-in-progress, retention receivables, garantie décennale exposure, vendor disputes and ongoing project margins enter the price discussion; lenders run their own due diligence on the same items
• Merger — combining two BTP companies’ books requires alignment of work-in-progress method, CIBTP regimes and project-cost recognition strategy
• Succession — transfer of ownership inside a family business raises personal tax, Pacte Dutreil, and group strategy questions in parallel; wealth and succession planning protect the family’s long-term investment, ownership continuity and personal financial position
• Disposal — the seller’s advisor prepares the information memorandum, working with the legal and tax team and the buyer’s due diligence agents
• Financing — equity raises, bank financing for working capital, project finance for large infrastructure work — each opportunity requires tailored support; financing terms are validated with the partner banks before signing

For each transaction, the team works alongside the client’s lawyer and tax advisor, with in-house expertise in transaction support, valuation and post-merger integration. The future impact on the owner’s wealth and the entity’s financial position is modelled in advance. We help build the success criteria, identify the growth opportunities and define the strategies before the deal opens; the goals on price, valuation multiple and post-deal earnouts are defined up front, with success measured against those goals at signing. Private equity buyers and other private investors evaluate sector targets using the same metrics, and the seller gains from preparing on those metrics. To meet investor expectations, the books must be clean, the vendor and supplier ledger reconciled, and the work-in-progress documented.

Methodology and Risk Management

Our methodology is built around the same operating model we apply across the firm: structured, documented, with strong internal controls and a clear lead-partner relationship.

• Onboarding — definition of perimeter, build of the chart of accounts, opening balances reconciled with the previous accountant
• Monthly close — vendor invoices captured, payroll integrated with CIBTP, work-in-progress updated, project margins reviewed; the close is a fixed-date routine, not a deadline that drifts
• Quarterly review — performance information, cash forecasting refresh, regulations check, vendor vigilance refresh
• Annual close — statutory accounts, impôt sur les sociétés return, liasse fiscale, reviewer interface where applicable
• Risk management — fraud detection routines, segregation of duties, vendor vigilance checks, garantie décennale monitoring
• Process refresh — recurring routines and processes are reviewed annually; we help improve and enhance each process so it scales with the business

Risk in this industry is concrete: an uninsured contractor, a missed travailleurs détachés declaration, a misapplied reverse-charge entry. Specialist support helps the entity maintain a documented control routine that addresses these exposures regularly. The exposure landscape evolves with each new regulation, each new technology adoption on site, and each new market entry. We help anticipate change and stay compliant. Effectively managing exposure is essential, and ensuring documentation is complete protects the company’s health across inspections and statutory reviews. Strategies for fraud prevention, vendor onboarding and process improvement are reviewed in every quarterly meeting. The processes that are stable today often need to be enhanced tomorrow to meet new e-invoicing, ESG and data-protection requirements.

How to Choose: Benefits and Criteria

Choosing the right partner is a strategic decision for any builder in France. Owners, founders and CFOs typically evaluate firms on four criteria, each with practical benefits:

• Sector expertise — does the team understand the mechanics (CIBTP, reverse-charge VAT, avancement, garantie décennale) or is this sector just one of many they serve? Specialized knowledge translates directly into accuracy and fewer reassessment exposures. Benefits include better dashboards, fewer surprises, and a clearer decision basis
• Team continuity — is the team of professionals assigned to the engagement stable, experienced and committed for the long run? Continuity protects institutional knowledge and reduces repeated onboarding effort; the same in-house team year after year is a benefit value highly
• Reporting depth — does the firm provide information that goes beyond statutory accounts, with site-level performance, project margin and cash flow analysis? Depth helps the entity improve operations, identify opportunities, develop and improve a growth strategy
• Regulatory standing and reputation — is the firm registered with the OEC and (where statutory review is required) CNCC? A top-ranking professional practice with established reputation serves as both an accountant and a strategic advisor

Other practical factors: technology fit between the firm and the client’s systems, training capacity for in-house staff, dedicated and tailored support for unique profiles, a clear pricing structure, range of complementary services (CFO support, consulting, deal assistance), and a communication style that fits the entity’s culture. Our consulting offer is consulting-led on points that matter: succession, growth strategy, deal support, and the choice between in-house and outsourced finance operations. We help build a solution tailored to the goals of each engagement, with input from senior CPA partners where the issue is technical or cross-border. A solution that fits one company will not fit another; our solutions are tailored, and assistance is available across the engagement. A high-quality service should provide both the technical depth and the responsiveness leaders expect from their advisor team.

Why Interexco

Interexco serves clients in this industry across France from our Paris head office at 30 Boulevard Haussmann, with regional input from Lille for the north, Milan for Italian groups operating in France, and Tunis for our Mediterranean activity. The team is nearly 50 strong, working in English, French, Italian, Spanish and Russian.

For an independent builder, a multi-site group or a foreign-owned operator, our sector knowledge is the operational difference between a generic service and a specialist team that understands site-level economics, project closures, retention release cycles, and the CIBTP mechanics that affect cash and payroll every month. We are committed to a sustained advisor relationship, and our team structure is designed for stable relationships year after year. Our standing among industry leaders is built on the same foundation: technical depth, sector knowledge, and the personal commitment of the partner in charge to each engagement. We offer dedicated partner involvement, with assistance from senior staff on every technical issue that matters.

Bottom Line: When This Service Is the Right Choice

A specialist firm in this domain is the right choice when your entity operates in bâtiment or travaux publics and your books must reflect the sector-aligned items — reverse-charge VAT, CIBTP, avancement, retention, garantie décennale — rather than be a generic ledger. The crucial benefit of a sector-experienced partner is fewer reassessment exposures, accurate project margin tracking, compliant travailleurs détachés declarations, and reliable information that owners and lenders can act upon.

The practical conclusion: a business in this field with project-based activity, vendor flows and CIBTP exposure should engage a practitioner that has handled similar challenges for similar businesses — not a generalist learning the sector on your books. A specialist team helps protect margin, helps maintain compliance, and helps the company develop a strong sustained position in a complex domain.

Frequently Asked Questions

What does a construction accounting firm in France do? A construction accounting firm in France handles bookkeeping, VAT, payroll, tax and reporting for builders, trades and groups under the Plan Comptable Général. The work includes project-based bookkeeping, work-in-progress recognition, retention management, reverse-charge VAT on vendor invoices, Convention Collective BTP payroll, Caisses CIBTP affiliation, and travailleurs détachés declarations where relevant.

How does reverse-charge VAT work in French construction? Under Article 283, 2 nonies of the Code général des impôts, when a subcontractor supplies building services to a main contractor — both VAT-taxable professionals — the subcontractor invoices excluding VAT and the main contractor self-assesses VAT under the reverse-charge mechanism (autoliquidation). The standard French VAT rate is 20% (CGI article 278).

What is the CIBTP? Caisses Congés Intempéries du Bâtiment et des Travaux Publics are sector-wide caisses that collect employer contributions for paid leave and bad-weather indemnity and pay employees directly during their leave or intempéries. Affiliation is mandatory for employers covered by the Convention Collective BTP.

Can foreign companies operate in France under travailleurs détachés rules? Yes — within the EU posting-of-workers framework and the Code du travail on travailleurs détachés. The foreign entity must file SIPSI declarations before the start of any work in France, designate a French representative, and ensure wages, working time and the applicable convention collective are respected.

How is work-in-progress recognised? French GAAP allows two approaches. The avancement approach (percentage of completion) recognises income as progress is made. The achèvement approach recognises income only on close-out. The choice depends on contract terms and the reliability of remaining-to-complete estimates, with disclosure in the notes.

Does Interexco act as accountant and statutory auditor for the same entity? Independence rules under CNCC standards prevent the commissaire aux comptes from also providing accounting outsourcing on the same target during the same audit cycle. Interexco organises its bookkeeping and audit teams in separate functional structures.

Which software is used? We work with the software in place where it is suitable, and we recommend implementing sector-aligned ERP and accounting tools where the existing systems cannot deliver project-level information. The technology choice is reviewed with the entity’s IT and finance leaders.

How are subcontractors checked for compliance? Every six months, the main contractor must obtain a fresh attestation de vigilance from URSSAF for each vendor exceeding €5,000 in cumulative value. Where the vendor uses travailleurs détachés, additional documents are required. We maintain the vendor file and run regular checks to ensure the data are current and accurately maintained.

What is the garantie décennale? The garantie décennale is a mandatory ten-year guarantee under French law, covering damage that affects the soundness of the works or makes them unfit for their purpose. Every operator must hold garantie décennale insurance before starting a job.

Speak With Our Team

If you operate in bâtiment or travaux publics in France — gros œuvre, second œuvre, trades specialty, civil engineering or multi-site group — speak with one of our chartered accountants about your project profile, payroll volume and reporting cycle.