The verdict in three sentences
A connector between your business app and your accounting software costs in Dublin in 2026 between 6,000 and 18,000 EUR, over 4 to 8 weeks of development. The regulatory context accelerates the decision: mandatory e-invoicing imposes structured formats (Factur-X, UBL, PEPPOL) that your tool must produce and transmit. Done well, the connector removes up to 70% of manual entry and makes the accounting close more reliable.
Price by accounting software
Cost depends on the quality of the target software's API and the depth of sync (invoices only, or invoices + payments + reconciliation).
| Accounting software | API type | Connector cost (EUR) | Timeline |
|---|---|---|---|
| QuickBooks Online | modern REST | 6,000 - 10,000 | 4-5 wks |
| Sage 100 / Sage BC | API + files | 8,000 - 15,000 | 5-7 wks |
| Cegid | dedicated API | 10,000 - 18,000 | 6-8 wks |
| Xero | native REST | 6,000 - 11,000 | 4-6 wks |
| Pennylane | native REST | 6,000 - 11,000 | 4-6 wks |
| Generic audit-file export | standardized file | 4,000 - 8,000 | 3-4 wks |
Add recurring maintenance: 150 to 500 EUR/month to track API changes and regulatory updates.
E-invoicing timeline and formats
European e-invoicing reform is phased: mandatory receipt for all businesses and progressive issuance by company size. Your connector must generate the right format and route through an approved platform.
| Element | Detail 2026-2027 |
|---|---|
| E-invoice receipt | mandatory for all businesses |
| Issuance (large/mid-cap) | priority phase |
| Issuance (SMEs/micro) | later phased-in |
| Accepted formats | Factur-X, UBL, CII, PEPPOL |
| Transmission channel | approved dematerialization platform |
| E-reporting | transaction data reporting |
2026 order of magnitude: anticipating compliance costs less than fixing it under pressure. A Factur-X connector integrated from the start avoids a second project.
Mini case study
Sophie, CFO of a 35-person trading SME in Dublin, issues 400 invoices/month from her management app, then re-keys them into Sage. This ties up an accountant ~14 hours/week, about 2,600 EUR/month of loaded time. She commissions a two-way app - Sage connector with Factur-X generation for 13,000 EUR and 300 EUR/month maintenance. Manual entry drops 70%: ~10 hours/week recovered (~1,850 EUR/month). Payback: around 8 months, plus secured e-invoicing compliance.
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FAQ
What does an accounting connector cost in Dublin in 2026?
Between 6,000 and 18,000 EUR depending on the software and sync depth. A simple audit-file export starts around 4,000 EUR; a full Cegid connector reaches 18,000 EUR.
Does e-invoicing change my project?
Yes: your connector must generate a structured format (Factur-X, UBL, PEPPOL) and route through an approved platform. Anticipating costs less than a rushed compliance fix.
How long does setup take?
From 4 to 8 weeks depending on the software. QuickBooks and Xero, with modern APIs, are fastest; Sage and Cegid take a bit longer.
What does monthly maintenance cover?
For 150 to 500 EUR/month, we track vendor API changes, regulatory format updates and fixes. It's essential with reform underway.
Can you also sync payments and reconciliation?
Yes, but that adds complexity and budget. An invoices + payments + reconciliation connector sits at the high end (12,000-18,000 EUR).
Let's scope your project. Tell us your accounting software, invoice volume and e-invoicing deadline, and we'll frame a compliant Factur-X connector. 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.
