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B2B Portal Development in France
Web Application Development for businesses in France - browser-based business applications: portals, dashboards, workflow tools and internal platforms. Fixed quote in EUR, a clickable prototype before the build, and the source code in your ownership.
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B2B Portal Development in France: the short answer
- What it is
- Web Application Development for businesses in France - browser-based business applications: portals, dashboards, workflow tools and internal platforms.
- What it costs
- We quote a fixed price in EUR after a discovery session, broken into phases so you are never committing to the whole build on day one.
- Local specifics
- TVA at the right rate on every invoice, Factur-X e-invoicing through an approved platform ready for the September 2026 reform, Zoho People connected to your French payroll provider for the DSN, French documents where the Loi Toubon requires them, GDPR-aware data handling in Zoho’s EU data centre, and delivery on Paris time (CET/CEST).
- Delivered by
- Shyphan AI Solutions. Support on French working hours (CET/CEST). Call +44 7343 086577.
- Last reviewed
- October 24, 2026
Why French businesses build with Shyphan
- Fixed quote in EUR agreed before a line of code is written
- A clickable prototype before you commit to the build
- Source code, repositories and cloud accounts in your ownership
- Accessible, WCAG-tested interfaces rather than an accessibility audit after launch
- Delivery and support on French working hours, Monday to Friday
What Web Application Development actually delivers
Web Application Development means browser-based business applications: portals, dashboards, workflow tools and internal platforms.
For French teams that matters because France runs on trading, contracting, logistics, hospitality and professional services, and almost all of it on lean teams that cannot afford software nobody uses. We build for French companies replacing spreadsheets, shared drives and email approvals with a proper platform, and we say no when a packaged product would do the job better than a custom build.
We work in React, Next.js, Node.js, Python, PostgreSQL, Redis, AWS and Azure, chosen because they are maintainable and widely supported, so you are never locked to us by an exotic technology choice.
Our certified Zoho team
Web Application Development across France
We deliver web application development for clients in Paris, Lyon, Marseille, Toulouse, Lille, Bordeaux, Nantes and Rennes. Projects run remotely on French working hours with on-site workshops in Paris, Lyon and Marseille where discovery or training justifies it.
The 20% TVA rate, the e-invoicing reform starting in September 2026, monthly DSN payroll filings and CNIL data rules have pushed businesses towards systems that produce compliant documents by default. Whatever the sector, the failure mode is the same: software built without the people who use it, and abandoned within a year. Discovery is where we prevent that.
Worth reading alongside this: API Development in France, Ecommerce Development in France and Marketplace Platform Development in France.
The stack we build on
Chosen for maintainability and for the fact that you, or anyone you hire later, can work on it. Nothing exotic that only we can support.
Getting B2B Portal Development right in France
Software for French businesses has to handle TVA, e-invoicing, the French language and GDPR from the first release. This is how we approach B2B Portal Development.
TVA and e-invoicing by design
Anything that bills applies the right TVA rate, carries the mandatory invoice mentions and can produce Factur-X for exchange through an approved platform.
French and English
Interfaces, documents and notifications work in French and English, with French by default for users in France.
Hosting in the EU
Hosting in an EU cloud region, often in France, where your customers or sector expect it, documented with access and retention.
GDPR and the CNIL
Consent, cookie rules, access requests, breach records and impact assessments are designed in, not bolted on.
How a web application development project runs
Five stages, a prototype before the build commitment, and a fixed price in EUR agreed up front.
Discovery and scope
Workshops with the people who will use it, a written scope and a fixed price in EUR before anything is built.
Prototype before build
A clickable prototype you review and change cheaply, so disagreements happen in Figma rather than in code.
Build in two-week increments
Working software you can see and use every fortnight, with priorities you can change between increments.
Testing and UAT
Automated tests on the paths that matter plus scripted UAT on your own scenarios before release.
Launch, handover and support
Deployment into your own cloud account, documentation, training and an optional support retainer on French working hours.
What French compliance means for B2B Portal Development
In France, TVA and corporate tax are filed with the DGFiP, payroll is reported every month through the DSN, and the e-invoicing reform changes how invoices are sent and received from 1 September 2026. These are the rules a French setup has to get right.
| Obligation | What the rule is | What has to be configured |
|---|---|---|
| TVA (VAT) | The standard rate is 20%, with 10% for restaurants, passenger transport and some renovation work, 5.5% for most food, books and energy-efficiency works, and 2.1% for the press and some medicines. Returns go on the CA3, monthly or quarterly for small amounts, under the régime réel normal, or on the annual CA12 with instalments under the régime réel simplifié. Intra-EU B2B trade uses the reverse charge (autoliquidation) with EMEBI and DES declarations, B2C distance sales go through the OSS, and import VAT is self-assessed on the CA3. | The right rate by item and customer, SIREN and intra-community VAT numbers on every invoice with the mandatory mentions (payment terms, late-payment penalty rate and the EUR 40 fixed recovery fee), reverse charge and OSS treatment set correctly, deductible TVA tracked, and CA3 or CA12 figures for each period. |
| E-invoicing reform | From 1 September 2026 every VAT-registered business must be able to receive structured e-invoices, and large and mid-sized companies (GE and ETI) must also issue e-invoices and e-report. SMEs and micro-businesses must issue from 1 September 2027. Invoices travel through approved platforms (Plateformes Agréées) in Factur-X, UBL or CII format, and invoices to the public sector already go through Chorus Pro. | Zoho Books' French edition producing Factur-X invoices and connected to B2Brouter, an approved platform, for sending and receiving, customer SIREN numbers captured on every account, and the full flow tested before your issuing date. |
| Corporate tax (IS) | The standard rate is 25%, or 15% on the first EUR 42,500 of profit for qualifying SMEs (turnover under EUR 10m, fully paid-up capital and at least 75% held by individuals). The annual liasse fiscale is built from accounts kept on the Plan Comptable Général, and the FEC (Fichier des Écritures Comptables) must be produced on request in a tax audit. | A chart of accounts on the PCG, entities kept separate, fixed assets recorded, and journals kept complete and sequential so the FEC can be produced on request. |
| Payroll (DSN, URSSAF, PAS) | Every month the employer files the DSN (déclaration sociale nominative) through net-entreprises.fr, pays social contributions to URSSAF and withholds income tax at source (prélèvement à la source). Payroll runs on a French payroll engine such as Silae, PayFit, Sage Paie or Cegid; Zoho Payroll is not available in France. | Zoho People kept as the HR record and connected to your payroll provider, so hires, pay changes, absences and leavers flow across without rekeying, and payroll journals posting to the ledger. |
| Employment and data rules | The legal working week is 35 hours, with RTT days where working time is set above it, five weeks' paid leave (2.5 working days per month), sector collective agreements (conventions collectives) and mandatory company health cover (mutuelle). GDPR is enforced by the CNIL, including consent before non-essential cookies, and the Loi Toubon requires French in consumer documents, employment documents and contracts. | Leave, RTT and working-time rules set per collective agreement, accounts provisioned in Zoho's EU data centre (zoho.eu), consent captured for every contact, French templates for customers and staff, and access and deletion requests handled on record. |
The filing calendar
- Monthly, quarterly or annuallyTVA return: the CA3 monthly (or quarterly for small amounts) under the régime réel normal, or the annual CA12 with instalments under the régime réel simplifié
- MonthlyDSN through net-entreprises.fr, with social contributions to URSSAF and income tax withheld at source
- Once a yearLiasse fiscale and corporate tax (IS) return, built from the annual accounts
- 1 September 2026 and 1 September 2027E-invoicing: every business must receive from 2026, large and mid-sized companies issue from 2026, and SMEs and micro-businesses issue from 2027
Who you file with
- TVA, corporate tax and the FECDGFiP (impots.gouv.fr, espace professionnel)
- Social contributionsURSSAF
- Monthly DSNnet-entreprises.fr
- Data protection and cookiesCNIL
- Invoices to the public sectorChorus Pro
We configure the system to produce what these returns need, and we test it against your own transactions before go-live. We are not tax advisers: your expert-comptable signs the returns, and rates and thresholds change, so treat this as the shape of the work rather than advice. Last reviewed 24 October 2026.
Industries we serve in France
From technology and finance to manufacturing, healthcare, retail and professional services.
Backed by a certified Zoho team
Our consultants are certified across Zoho CRM, Books, One, Creator, Analytics and People, and we stay active in the Zoho community, including Zoholics. You work with senior people who know the platform inside out.
From discovery to go-live and ongoing support, the same team stays with you, available on Paris time (CET/CEST) by call, email and screen-share.
Whether you are moving off spreadsheets or scaling an existing Zoho setup, our certified team does the heavy lifting and trains yours to own it with confidence, so your investment keeps paying off long after go-live.
Trusted by teams worldwide
What French clients typically get
Typical outcomes on our French projects. Every engagement is scoped to the business.
Built for French users
French and English, accessibility and GDPR designed in from the first screen.
Software you own
Full source code, documentation and deployment scripts handed over, so you are never dependent on us to make a change.
Support on French hours
Sprint demos, releases and support overlapping CET business hours, with a fixed, phased quote in EUR.
Related pages you may want next
B2B Portal Development France: questions answered
Can B2B Portal Development produce French e-invoices?
Can B2B Portal Development be hosted in France or the EU?
Can it handle several companies under one group?
Will it meet accessibility requirements?
How do you handle hosting?
How much does web application development cost in France?
What happens after launch?
Is Shyphan a Zoho Premium Partner in France?
Do you work outside Paris?
What does the first conversation cover?
More on B2B Portal Development in France
Related development services in France
Ready to scope your web application development project?
Book a free discovery call. We will tell you whether this should be custom at all, and if it should, what it will realistically take.
- Fixed quote in EUR
- Prototype before build commitment
- Source code in your ownership
- Support on French working hours
