The verdict in three sentences
A connector between an ERP such as Sage and a web app costs EUR 6,000 to 20,000 in Dublin in 2026 and ships in 3 to 8 weeks. Price depends first on the ERP version (Sage 200, Sage X3, Sage 50, Sage Intacct) and on data direction, one-way or bidirectional. Plan EUR 150 to 500 per month for maintenance, because ERP updates and duplicate records never stop.
Cost by ERP version and data flows
Not every ERP version integrates the same way. Sage X3 and Sage Intacct expose documented web APIs. On-premise editions widely used by Irish SMEs, such as Sage 200 or Sage 50, often rely on a local SDK, a SQL database or middleware, which makes the job heavier.
| ERP version | Common access method | Connector budget | Timeline |
|---|---|---|---|
| Sage Intacct | Native REST API | EUR 6,000 to 12,000 | 3 to 4 weeks |
| Sage X3 | GraphQL API or web services | EUR 10,000 to 20,000 | 5 to 8 weeks |
| Sage 200 (on-premise) | SDK or SQL Server | EUR 8,000 to 18,000 | 4 to 7 weeks |
| Sage 50 | scheduled export/import | EUR 6,000 to 10,000 | 3 to 4 weeks |
| Integration platform (iPaaS) | ready-made connectors | EUR 3,000 + EUR 200 to 800/month | 2 to 3 weeks |
Add ERP-side costs: an API or SDK access module, configuration by your Sage partner, sometimes EUR 1,000 to 4,000. Ask your reseller before signing for the connector.
Which flows to sync, and in what order
The classic trap is syncing everything at once. The right method goes flow by flow, naming a single master system for each piece of data.
| Flow | Master system | Direction | Recommended frequency | Complexity |
|---|---|---|---|---|
| Items and prices | ERP | ERP to app | every 15 to 60 min | low |
| Stock | ERP | ERP to app | every 5 to 15 min | medium |
| Customers | ERP (creation allowed in app) | bidirectional | real time or 15 min | high (duplicates) |
| Orders | App | app to ERP | real time | medium |
| Invoices and credit notes | ERP | ERP to app | daily or hourly | low |
| Payments and balances | ERP | ERP to app | daily | medium |
The bidirectional customer flow causes most incidents: the same company entered twice with two spellings, missing company number, different delivery address. A dedup rule on the CRO company number and VAT number prevents 80 to 90% of duplicates.
Error handling, logs and maintenance
A reliable connector is invisible. That requires a queue that retries failed sends, a sync log sales admin can read, and an email or Slack alert above an error threshold.
| Element | Without | With | Extra cost |
|---|---|---|---|
| Queue and automatic retry | orders lost if ERP is down | no loss | EUR 1,500 to 3,000 |
| Readable log | developer diagnoses | sales admin is autonomous | EUR 1,000 to 2,500 |
| Error threshold alerts | late discovery | reaction within 15 min | EUR 500 to 1,000 |
| ERP test environment | testing in production | risk-free acceptance | EUR 0 to 2,000 |
| Monthly maintenance | fixes billed case by case | ERP updates covered | EUR 150 to 500/month |
Major ERP updates, once or twice a year, can break a field or format. A maintenance contract covers a check after each release.
Mini case study
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Julian, IT manager of an aerospace parts SME in Dublin, manages 3,200 items and 900 customers in Sage 200. Sales reps enter orders in the web app, then sales admin re-keys them into the ERP: 25 hours a week, about 1,100 hours a year at EUR 32 fully loaded, EUR 35,200.
The connector costs EUR 14,000, plus EUR 2,500 of ERP-side licensing and EUR 300 monthly maintenance (EUR 3,600 a year). Re-keying drops to 3 hours a week for exceptions. Annual savings: about EUR 31,000 of admin time, not counting pricing errors avoided. Payback in roughly 7 months.
FAQ
How much does ERP integration with a web app cost?
Budget EUR 6,000 to 20,000 depending on the ERP version and number of flows. A bidirectional Sage X3 integration sits at the top of the range.
Do on-premise Sage editions have an API?
They usually integrate through an SDK, the SQL database or middleware rather than a native REST API. That adds 1 to 3 weeks and an access licence to arrange with your reseller.
Do we need real-time sync?
Not for everything: orders yes, items every 15 to 60 minutes, invoices once a day is enough. Real time everywhere adds 20 to 30% to the cost with no business benefit.
Is an iPaaS platform cheaper?
It starts fast, around EUR 3,000 of setup, but costs EUR 200 to 800 a month. Over 3 years it often exceeds a dedicated connector once business rules are specific.
What happens if the ERP is down?
With a queue, orders are held and replayed automatically when the ERP returns. Without it, every outage can lose orders.
Let's scope your project. Tell us your ERP version, the flows to sync and your volumes: we will price a connector between EUR 6,000 and 20,000 delivered in 3 to 8 weeks. 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.
