Diamontis FX
Firms and client portfolios

Accountants: getting your client portfolio ready for e-invoicing

The 2026 reform is not declared firm by firm: it is declared client by client. Each of your files must have appointed a registered platform before 1 September 2026, and you will be the first person asked about it.

What changes in your practice

Collecting documents stops being a chasing exercise. Your clients supplier invoices arrive structured, dated and tied to their issuer: what used to require data entry or character recognition becomes usable data on arrival.

In return, a file that has not appointed a platform by 1 September 2026 stops receiving anything from its best-equipped suppliers. The subject is therefore not compliance in the abstract, but the continuity of your clients business.

Managing several companies from a single account

Diamontis FX is multi-company by design, not by an option bolted on afterwards:

Retrieving entries: FEC export

The Fichier des Ecritures Comptables is the standard format the French tax authority requires during an audit. Diamontis FX exports it for the period of your choice, from invoices actually transmitted - not from re-keyed data.

It is also the easiest format to load into accounting production software: you do not have to change tools to work with an equipped client.

Evidential archiving, taken care of

Every invoice received or issued is sealed and kept for ten years, with its fingerprint and its timestamp. Your clients have nothing to organize on their side, and you get a reliable audit trail without having to reconstruct anything.

Which plan for a firm

The Business plan (€29 excl. VAT per month) unlocks multi-company management, firm access and high volumes. For a large portfolio, a dedicated offer exists: it is discussed case by case, because it depends on the number of files and the pace at which they are connected.

Compare plans and their quotas

Going further

Create an account, connect a first file, and judge for yourself before committing the portfolio.

Create a free account