Accountants and their internal tools: what custom software unlocks

From September 1, 2026, electronic invoicing becomes mandatory through an approved platform (impots.gouv.fr). Seven in ten practices are microbusinesses: the ideal moment to replace Excel workarounds with internal tools of their own.

From September 1, 2026, businesses subject to the requirement will need to use an approved platform to send and receive electronic invoices (impots.gouv.fr/facturation-electronique-et-plateformes-agreees). Seven in ten accounting practices are microbusinesses (OMECA barometer, December 2024): they will reconfigure their workflows at the same time, an opportunity to reopen the whole question of internal tools.

Accounting production is equipped; the practice is not

Pennylane, Cegid, ACD, MyUnisoft: accounting production itself is a market saturated with vendors. What lags behind is the practice's internal tooling: production tracking, case allocation and the portal requesting a missing document from a client. Vendors positioned here, MyUnisoft Gestion Interne, Kabineo, Queoval, sell another module to integrate into the existing stack, not a tool tailored to how the practice actually works.

What forums reveal: you are the glue between two applications

On Compta Online, professionals describe the real bottleneck: ‘There are many ways to retrieve bank feeds directly from banks with EBICS mandates and so on, but it can be expensive’ (Tahiosten, March 24, 2025, compta-online.com). Another adds: ‘These files are not sent automatically; the client must configure the export correctly and send it to the practice periodically’ (Fabrice Heuvrard, April 13, 2025). Between two commercial applications that do not communicate, someone bridges the gap manually, or in Excel.

Three internal tools a practice can have built

Production tracking that reflects the practice's actual organisation, not a generic status imported from a vendor. A missing-documents portal that automatically follows up with clients according to the practice's rules rather than those of a third-party module. A processing tool that absorbs inconsistent bank and client formats before they land in a spreadsheet yet again. Three components nobody sells, because vendors make their living from the opposite: selling another module rather than a tool that replaces three.

A practice that specifies well builds well

An accountant is the ideal reader for a method where the specification comes before code: they already write engagement letters, processes, quality procedures and fee schedules broken down line by line. Describing the practice with the same rigour as an engagement letter, reviewing every document before it becomes a tool, is an existing professional skill transferred to new ground. Nobody needs to teach you precision: it simply needs redirecting towards a tool rather than a client file.

September 2026: the window of opportunity

Postponing electronic invoicing is not an option: the calendar imposes it, and all practices will have to touch their collection workflows at the same time. Make the most of it by looking at what the practice already does manually every day without a dedicated tool, rather than simply attaching another module to what exists. Those repeated actions are the best possible specification: they describe exactly what an internal tool should do, without anything needing to be guessed or invented.

What it costs compared with another module

An internal management software subscription adds month after month to a stack already loaded with accounting production itself. A custom internal tool, built from a precise description of your workflows, does not replace your production software; it fills exactly the gap between two applications that nobody else has an incentive to fill for you.

Where to start

List three workflows that pass through a spreadsheet or human memory: chasing documents, tracking case progress and allocating inconsistent bank feeds. Describe the first on one page, like a requirements document written without technical jargon.