The verdict in three sentences
A custom API connector between Sage and a B2B website costs EUR 8,000 to EUR 25,000 excl. VAT in 2026 and ships in 6 to 10 weeks. For a wholesaler re-keying 150 orders a day, it frees about 1.5 FTE and syncs stock and customer pricing every 15 minutes, which ends sales of out-of-stock items. SaaS middleware at EUR 150 to EUR 600 per month remains relevant for standard flows, but bespoke wins once negotiated prices and customer-specific discounts get complex.
What re-keying costs today
A supplies wholesaler that receives B2B orders on its website and re-keys them into Sage pays three times: in data entry time, in reference or quantity errors, and in sales of items already out of stock because the website stock is updated once a day, or even once a week.
| Indicator | Manual re-keying | API connector |
|---|---|---|
| Orders processed per day | 150 | 150 (no entry) |
| Entry time per order | 4 - 6 minutes | 0 |
| Total daily time | 10 - 15 hours | Exception checks: 1 hour |
| Entry error rate | 2 - 3% | under 0.2% |
| Stock update frequency | Daily | Every 15 minutes |
| Orders on out-of-stock items | 3 - 5% | under 0.5% |
| Order to picking delay | Half a day | A few minutes |
Custom connector or SaaS middleware
Market integration platforms offer ready-made Sage connectors. They fit when flows are standard: products, stock, orders. As soon as the website must show each customer's negotiated terms, manage credit limits or several warehouses, configuration becomes heavy and the tool's limits show.
| Criterion | SaaS middleware | Custom connector |
|---|---|---|
| Upfront cost | EUR 2,000 - 8,000 setup | EUR 8,000 - 25,000 |
| Recurring cost | EUR 150 - 600/month | Maintenance 10 - 15% per year |
| 3-year cost (order of magnitude) | EUR 7,400 - 29,600 | EUR 10,400 - 36,250 |
| Customer pricing and discounts | Partial | Complete |
| Credit limits and account holds | Rarely | Yes |
| Multi-warehouse | Depends on plan | Yes |
| Vendor lock-in | Strong | Code handed to client |
Over three years the two options converge. The choice therefore rests on commercial complexity, not price alone.
Budget and schedule for a Sage connector
| Building block | 2026 budget (EUR excl. VAT) | Timeline |
|---|---|---|
| Flow and Sage configuration audit | 1,500 - 3,000 | 1 week |
| Catalogue and stock sync (15 min) | 2,000 - 5,000 | 1 - 2 weeks |
| Customer prices, discounts, terms | 2,000 - 6,000 | 2 weeks |
| Order push into Sage | 1,500 - 5,000 | 1 - 2 weeks |
| Delivery status and invoices to website | 1,000 - 4,000 | 1 week |
| Monitoring, error log, alerts | 1,000 - 2,000 | 1 week |
Acceptance testing runs in parallel on a copy of the Sage database for two weeks before cutover, so invoicing is never blocked.
Mini case study
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Ciarán, IT director of an industrial supplies wholesaler in Dublin, watches his team re-key 150 orders a day at 5 minutes each, i.e. 12.5 hours daily, about 1.5 FTE. At a loaded cost of EUR 42,000 per FTE, re-keying costs EUR 63,000 a year. The custom connector is priced at EUR 18,000 plus 15% annual maintenance, i.e. EUR 2,700. The two people involved move to customer service and collections: the investment pays back in under 4 months, and orders on out-of-stock items fall from 4% to under 0.5%.
FAQ
How much does a connector between Sage and a B2B website cost in 2026?
Between EUR 8,000 and EUR 25,000 excl. VAT depending on customer pricing complexity and number of flows. A standard scope (stock, orders, invoices) lands around EUR 12,000 to EUR 15,000.
What timeline should we plan?
Allow 6 to 10 weeks, including two weeks of parallel testing on a database copy. Cutover happens without interrupting invoicing.
Why sync every 15 minutes rather than in real time?
Mid-market ERPs are not built for constant calls; 15 minutes is enough to bring stock-outs under 0.5% without overloading the server. Orders themselves are pushed immediately.
What does maintenance cost?
Plan 10% to 15% of the initial cost per year, i.e. EUR 1,200 to EUR 3,750. It covers ERP updates and website changes.
Do we need a specific Sage licence?
Data access goes through Sage integration tools or the SQL database depending on your version. The initial audit checks this within one week.
Let's scope your project. Tell us your ERP version, e-commerce platform and order volumes: we will scope the flows, indicative budget and cutover plan. 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.
