B2B ecommerce ERP integration is the automatic, two-way exchange of data between the B2B site your dealers order from and your ERP. Orders drop into the ERP without retyping, while stock, customer-specific prices, credit limits, balances and invoices flow back to the site. Sales staff sell instead of keying data, and dealers trust what they see.
The B2B site went live, so why didn't the workload fall?
Plenty of companies launch a B2B site and, a few months later, notice something odd: orders now arrive through the site, yet the sales support team still spends the day typing them into the ERP. Without a genuine connection, each order reaches the office as an email or a spreadsheet export and someone re-enters it. Data entry hasn't disappeared; it has simply moved.
The deeper problem is the return journey. The stock shown on the site is last night's count, a dealer's discount has changed in the ERP but not online, and a customer who is over their credit limit can still place an order. The dealer still rings to ask whether the invoice has gone out and what they owe. A B2B dealer portal only delivers on its promise when it shares the same data as the ERP.
The hidden cost of a B2B site without ERP integration
Electronic sales channels are spreading quickly in Türkiye, but the core systems that feed them are not in place at every firm:
According to TurkStat's ICT Usage Survey in Enterprises, 2026, the share of Turkish enterprises selling via the internet or EDI (electronic data interchange) rose from 13.6% in 2024 to 17.1% in 2025, reaching 29.7% among firms with 250 or more employees.
The 2025 edition of the same survey found that only 28.3% of enterprises with ten or more employees used ERP software. In other words, many firms put up a sales site while orders, stock and customer accounts still live in separate spreadsheets; if that sounds familiar, start with our guide to ERP for SMEs. B2B also carries real weight in European web sales: Eurostat's e-commerce statistics show that web sales made up 8.39% of EU enterprises' turnover in 2024, with 4.34% coming from sales to other businesses and public bodies.
The heaviest price of moving data by hand is often lost trust. In the 2025 Outlook: Data Integrity Trends and Insights survey of 565 data professionals by Drexel University's LeBow College of Business and data software company Precisely, 67% said they did not fully trust the data their organisation used. When a dealer sees one price on the site and another on the invoice, that distrust spreads to your customers.
Which data should flow in which direction?
The first integration decision is to name a single "source of truth" for each type of data. If two systems update the same field independently, sooner or later one overwrites the other. For a typical manufacturer or distributor, the split looks like this:
| Data | Source of truth | Direction | How often |
|---|---|---|---|
| Item master, unit, VAT rate | ERP | ERP → B2B | On change |
| Images, datasheets, descriptions | B2B admin or product information system | Stays in B2B | On change |
| List price, dealer discount, promotions | ERP | ERP → B2B | On change, immediately |
| Stock and reservations | ERP or WMS | ERP → B2B | Within minutes |
| Account balance, credit limit, payment terms | ERP | ERP → B2B | Queried at checkout |
| Order | B2B | B2B → ERP | Immediately |
| Order status, delivery note, invoice | ERP | ERP → B2B | On status change |
| Receipts and payments | ERP / bank | ERP → B2B | Daily or real time |
The real source of stock is usually the warehouse, so the site is only as accurate as the records in your warehouse management system (WMS). We explain how invoices reach Türkiye's Revenue Administration (GİB) and the difference between e-Invoice (e-Fatura) and e-Archive (e-Arşiv) in our e-invoice integration guide; the document a dealer downloads from the B2B site should be the official document produced in that e-Invoice or e-Archive process.
Firms that price in foreign currency face one more decision: is the exchange rate fixed when the order is placed or on the day the invoice is issued? Unless the rule is defined identically on the site and in the ERP, the amount the dealer approved and the amount on the invoice will differ. Dispatch needs a similar match: the e-Delivery Note (e-İrsaliye) number created in the ERP should flow back to the site with the order status, so the dealer can see the goods are on their way without picking up the phone.
A 7-step plan for B2B ecommerce ERP integration
- Write down your sales rules. Dealer segments, price lists, currency and exchange-rate rules (for example, the Central Bank of the Republic of Türkiye daily rate), minimum order quantities and cases that need approval. Every rule that lives in a sales rep's head must become a parameter. We walk through how to run this exercise in software requirements analysis.
- Agree data ownership. Fill in the table above for your own business and get sign-off from sales and finance; the argument should end here, not after go-live.
- Clean the master data. Duplicate customer accounts and items set up under different units will travel straight to the dealer's screen. Check at this stage that item barcodes follow GS1 barcode standards. We cover the clean-up method in data quality and duplicate records.
- Choose the integration method. If your ERP has a documented API, record-level transfers plus event notifications (webhooks) are the most robust option; otherwise use a staging database or scheduled file transfers. We compare the approaches in API integration explained. If major customers send orders by EDI, the message structures in our EDI integration guide belong in scope too.
- Define error and retry rules. If the ERP doesn't respond, the order must not vanish; it should wait in a queue, be retried and, after a set number of attempts, alert someone. Each order needs a unique reference so it can never be posted twice.
- Test the exceptions. Part shipments, returns, cancellations, credit-limit breaches, prices changing mid-order and exchange-rate differences should all be tested with real data before go-live.
- Pilot with a few dealers, then measure. Start small, then compare manually corrected orders, order-to-dispatch time and "where's my order?" calls with the previous month.
These steps look minor, yet this is exactly where many ERP projects stumble. Panorama Consulting's 2026 ERP Report found that more than a quarter of respondents went over budget, most often because of an unexpected need for additional technology. If integration scope isn't written down early, that "additional need" is almost certain to appear; we list the warning signs in why ERP projects fail.
Off-the-shelf connector or bespoke integration?
Standard connectors exist between popular ERPs and packaged B2B platforms. If your product range and pricing rules are simple, one may be enough. With dealer hierarchies, customer-specific catalogues, currency-based pricing, multiple warehouses or custom ERP fields, a ready-made connector tends to work "almost" and the gap is closed by hand again. We set out the decision criteria in custom versus off-the-shelf software.
Security, permissions and data protection
A B2B site exposes commercially sensitive data such as discount rates and account balances. Each dealer should see only their own data, and the people working at a dealer should have separate rights to order, view invoices and see payment details. The integration account in the ERP should reach only the fields it needs, never run under an administrator login that can read every table.
Login pages attract password attacks, so set dealer account rules according to our business password security guide. Dealer contacts' names, phone numbers and addresses are personal data under KVKK, Türkiye's Personal Data Protection Law No. 6698, so privacy notices, retention periods and access logs belong in the design from day one.
What you gain once the systems talk
Once connected, the B2B channel also becomes a data source. Which dealer orders how often, and from which product group, combines with ERP sales data. A management dashboard with the right KPIs built on that data shows your sales team which dealer is going quiet weeks before it shows up in revenue.
The same data helps on the demand side. Dealer order history is the cleanest input for AI demand forecasting, because it was created in the system with a date and quantity rather than typed in later. If you also sell to consumers through marketplaces, our marketplace integration guide shows how to connect the same ERP to those channels.
How we do this at Digital Bridge
We build B2B ecommerce systems for manufacturers, distributors and wholesalers around their own sales rules, and connect them to the ERP. A typical project runs like this:
- Discovery and requirements analysis. With your sales, finance and warehouse teams we document dealer segments, pricing and discount rules, credit limits and approval steps, and record who owns each type of data.
- The ERP stays at the centre. We build two-way links with Logo, SAP, Mikro and bespoke ERPs as part of our API integration work. If you have no ERP yet, or the current one cannot carry the load, we assess your ERP requirements alongside the B2B project.
- Traceable transfers. Every transfer is logged with its time and result on an integration monitor, so "why didn't this order reach the ERP?" is answered from records rather than guesswork.
- We start with a pilot. We go live with a small group of dealers, refine screens and rules from their feedback, then roll out to the whole network. We support projects across every province of Türkiye, both remotely and on site. For field sales reps, the same platform can be delivered as a mobile app.
During the transition, orders that still arrive by email can be handled in SmartMail, part of our Smart360 family, which gathers the shared orders mailbox in one panel and assigns each message to an owner. We don't install an off-the-shelf B2B package; after the requirements analysis we send a written proposal setting out scope, phases and cost.
Next step
Pull three numbers from last month's orders: how many were keyed into the ERP by hand, how many were corrected afterwards, and how many dealers phoned about stock or balances. Bring that table to us via our contact page and we'll work out an integration scope that fits your ERP and dealer structure. More guides on the topic are collected under Software Development.