Automating an accounting firm: document collection, documents, internal assistant

In short

Automating an accounting firm in 2026 means first tackling three projects: document collection with automatic follow-ups that know what is missing file by file, the generation of recurring documents (engagement letters, brochures, letters), and an internal assistant that answers questions on tax documentation and the firm's procedures.

• Document collection is the first goldmine: during tax season, client follow-ups can take up 3 to 5 hours a week per staff member.
• A staff member commonly handles 40 to 60 files: it is impossible to track manually what is missing in each one without documents slipping through the cracks.
• 2026 momentum: all companies will have to be able to receive electronic invoices by 1 September 2026, and SMEs will have to issue them by 1 September 2027. Your clients are going to have to change their habits: you might as well take advantage of it.
• On budget: a simple automation from 440 € excl. tax, a complete business agent from 1 760 € excl. tax, where agency custom builds often start at 15,000 €.
• An honest limit: the agent follows up, sorts and prepares. Review and advice remain with the chartered accountant.

The problem, concretely

When I talk with firms, the same observation always comes up: the workload peak from January to May does not come from accounting complexity. It comes from the logistics around it. Chasing missing bank statements, purchase invoices, expense receipts. Retyping an engagement letter from last year's Word template, hoping not to forget to change an amount. Answering, for the third time that week, the same junior's question about the VAT procedure for a particular case.

Do the maths for your own firm: if each staff member spends even just 3 hours a week following up and checking off missing documents during the 16 to 20 weeks of tax season, that adds up to 50 to 60 hours per staff member per season. In a firm of 6 staff, we are talking about 300 to 360 hours a year of work with no accounting value added, i.e. the equivalent of 8 to 10 full weeks of one person.

And the calendar adds a reason to act now: the rollout of electronic invoicing (mandatory reception for all companies on 1 September 2026, issuance for SMEs and very small businesses on 1 September 2027) will force your clients and your firm to rethink document flows anyway. It is the right moment to rethink the whole process rather than patch up the old one.

Project 1: document collection, with follow-ups that know what is missing

The classic process, before: the staff member opens the file, compares what has arrived with what should be there, notes the gaps somewhere, writes a follow-up email, the client answers partially, and it all starts again the following week. Multiplied by 50 files, this manual checking falls apart as soon as the pressure rises, exactly when it would need to hold.

The process with a collection agent, after: the agent knows, for each file, the list of expected documents according to the client's profile (monthly statements, purchase invoices, cash, expense reports, social security receipts). It checks off what has arrived in the inbox or the document management system, identifies precisely what is missing, and follows up with the client with the exact list: not a generic email "please send us your documents", but "we are missing your February statements and the vehicle invoice". The follow-ups space out and change tone according to history, and beyond a threshold, the agent hands over to the staff member with the full context. No one follows up by hand, and nothing slips through the cracks.

A worked example, on a fictional but realistic firm. The firm Vasseur & Associés: 6 staff, around 220 files, very small business and self-employed professional clients. Before: each staff member spent 3 to 4 hours a week on follow-ups and checking during tax season, and around twenty sets of accounts went into extension each year for lack of documents. After setting up a collection agent connected to the firm's inbox and document management system: checking is automatic, follow-ups go out on their own with the exact list of gaps, and staff only handle the cases where a human is really needed, i.e. about 45 minutes a week each. The gain: around 15 hours a week for the firm at peak season, and above all complete files sooner, hence smoothed production instead of a wall in April.

Project 2: recurring documents, generated instead of retyped

Engagement letters, annual brochures, certificates, renewal letters, reports: a firm produces hundreds of documents each year that all follow the same skeleton, with the file's data changing. Retyping them from a Word template is slow and, above all, a source of errors: an amount from last year forgotten in an engagement letter means a genuinely awkward conversation with the client.

The automated version: the templates are defined once, in your branding, and documents are generated from the file's data, ready to proofread and send. An engagement letter that used to take 30 to 45 minutes of copy-paste-check is generated in a few seconds, and the staff member only does the proofreading. Coupled with the electronic signature, the full circuit (generation, sending, signing, archiving) fits in a day instead of two weeks of back-and-forth. I detailed the orders of magnitude of this project in how much PDF document generation costs.

Project 3: an internal assistant on your tax documentation and procedures

A third goldmine, less visible but quite real: interruptions. Internal procedure questions, the "how do we handle this case here again?", searches in tax documentation or internal notes. Each question interrupts a senior, and each interruption costs double its duration in regaining focus.

A RAG assistant (I explain it simply in what is RAG) indexes your procedures, your internal notes and your documentation, and answers the team's questions by citing its source: the exact document and passage. The non-negotiable point: it is bounded to YOUR documents and answers "I don't know, check with a senior" rather than making things up. This is exactly the setup running on beforbuild.com, my B2B SaaS, where the assistant answers questions on the business documentation with systematic citation: the same mechanism applies to a firm's procedures.

And the limit, stated plainly: none of these three projects touches accounting judgement. The agent collects, generates, retrieves. Review, arbitration and advice remain human, and no binding document goes out without validation. On client data, the rules are those of any sensitive processing: access rights by file, appropriate hosting, and the framework set out by the CNIL on AI and personal data.

How much it costs (and what it brings back)

On the market, a custom build of this type by an agency or IT services company commonly runs between 15,000 and 50,000 €, depending on the scope and the number of integrations. Existing SaaS collection tools are cheaper to start with, but they impose their process on your clients and rarely cover your particular cases: it is precisely on the particular cases that manual follow-ups fall apart.

My approach is in between: features already built and proven in production, customised to your firm. A simple automation (a follow-up workflow, a document generation) starts at 440 € excl. tax; a complete business agent (multi-source collection, rules by file profile, supervision) starts at 1 760 € excl. tax. Scope and price set before starting, details on AI agents and automation.

The return is simple to calculate. Take the 300 annual hours from the example above: at 35 € of loaded hourly cost, that is more than 10,000 € of time a year consumed by follow-ups and checking. An agent at 1 760 € excl. tax pays for itself over the first tax season, and the following seasons are net gain, not to mention accounts delivered on time and staff who finally do accounting.

Where to start

Three steps, in this order:

• 1. A free 30-minute audit. We review your document and paperwork flows, and identify the project with the best gain/effort ratio for your firm. No commitment, and you leave with the analysis even if we do not work together.
• 2. A single project, measured. Usually document collection, because the gain shows from the very first season. We measure before (follow-up hours, incomplete files) so we can compare after.
• 3. Extend on proof. Once the first project is profitable, we add document generation then the internal assistant. The method applies to any repetitive process, I list others in 5 processes to automate in an SME.

Sources

• impots.gouv.fr · Discovering electronic invoicing
• economie.gouv.fr · All about electronic invoicing (2026-2027 timeline)
• CNIL · Artificial intelligence and personal data