The verdict in three sentences
A client portal with document management (DMS), document collection with OCR and e-signature for an accounting firm costs between 20,000 and 32,000 EUR, delivered in 12 to 16 weeks. The time-saving features are automated document collection with OCR and integration with the accounting production software. The typical gain is 6 to 10 hours/week per staff member, paying back the project in under 18 months for a firm of 5 or more.
Line-by-line estimate
Typical portal for an accounting firm: clients upload documents, sign them and track their deadlines. 2026 order of magnitude.
| Line item | Scope | Range (EUR) |
|---|---|---|
| Portal + DMS | Client spaces, folders, access rights | 8,000 - 14,000 |
| Document collection (OCR) | Upload, recognition, categorization | 4,000 |
| E-signature | Provider integration (eIDAS) | 1,500 (setup) |
| Accounting-software integration | Connect production software (ACD, Cegid, Sage) | 5,000 |
| Notifications & reminders | Deadlines, missing documents | 1,500 - 2,000 |
| QA & compliance | Testing, GDPR, professional secrecy | 2,000 - 3,000 |
| Total | 20,000 - 32,000 |
E-signature adds a usage cost: expect 0.5 to 2 EUR per signature depending on volume and level (simple, advanced, qualified eIDAS).
Recurring costs and cost per signature
| Item | 2026 order of magnitude | Basis |
|---|---|---|
| Secure hosting (EU) | 100 - 300 EUR/month | monthly |
| Maintenance | 400 - 900 EUR/month | monthly |
| Simple e-signature | 0.5 - 1 EUR | per signature |
| Advanced / qualified signature | 1 - 2 EUR | per signature |
| OCR (beyond bundle) | 0.01 - 0.05 EUR | per page |
| Document storage | included / by volume | monthly |
For a firm signing 400 documents/month at advanced level, the signature line is about 400 to 800 EUR/month, easily offset by time saved.
What OCR and integration really change
| Task | Without portal | With portal + OCR | Gain |
|---|---|---|---|
| Chasing missing documents | Manual, emails/calls | Automatic | -80% time |
| Data entry / matching | 100% manual | Pre-categorized by OCR | -50 to 60% |
| Signing a document set | Print, mail, scan | Online, a few minutes | days -> minutes |
| Finding a document | Paper/mail folders | Instant DMS search | -90% |
| Tracking client deadlines | Spreadsheet | Portal dashboard | reliable |
The sum of these gains is the source of the 6 to 10 hours/week per staff member figure.
Mini case study
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Ms. Sabatier, partner at an accounting firm in Toulouse (6 staff, 210 clients) spent considerable time chasing documents and getting sets signed by mail. The firm invested 26,000 EUR in a portal (DMS, OCR collection, signature, integration with its production software), plus 700 EUR/month of running costs and about 500 EUR/month of signatures. Each staff member saves ~8 h/week; across 6 people at a loaded cost of ~35 EUR/h, that is about 7,000 EUR/month of recovered capacity. ROI is reached in ~5 months outside the peak tax season.
FAQ
Is e-signature legally valid?
Yes, if it complies with the eIDAS regulation. You choose the level (simple, advanced, qualified) per document type. Cost per signature runs 0.5 to 2 EUR; integration setup is about 1,500 EUR.
Does OCR really recognize invoices and expense notes?
Yes, with a high rate on clean documents. OCR pre-categorizes and pre-fills, a staff member validates. Data-entry gain is around 50 to 60%, not 100%, since human review remains necessary.
Can any accounting production software be connected?
The main ones (ACD, Cegid, Sage, Quadratus) expose APIs or imports. Integration costs about 5,000 EUR; for a closed system, you use file exports/imports, less smooth but functional.
How do you guarantee professional secrecy and GDPR?
EU hosting, encryption, per-folder access rights and logging. QA includes a compliance review (2,000 to 3,000 EUR line) that is essential for a firm.
Is it worth 20,000 EUR for a small 2-3 person firm?
Often not as full custom: a vertical SaaS with a built-in portal fits better below 4-5 staff. Custom becomes profitable when document and signature volume justifies deep integration.
Let's scope your project. Tell us your production software, client count and signature volume: we scope an accounting-firm portal between 20,000 and 32,000 EUR. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
