Building a B2B e-commerce website comes down to nine decisions, and the first two, how you model pricing and how you connect your ERP, decide whether the rest is smooth or turns into rework. This guide walks all nine in order, with a build-vs-buy comparison, realistic timelines and cost, and how to handle bulk wholesale orders. For what a B2B e-commerce website is and how it differs from B2C, see the parent guide to B2B e-commerce websites.
What is B2B e-commerce website development?
B2B e-commerce website development is the process of planning, building, and launching a login-gated online store that sells to other businesses, with customer-specific pricing, ERP integration, and terms-based payment. It differs from standard e-commerce development in one decisive way: the pricing and integration rules are decided first, because they shape every later choice.
Most B2B builds fail not on design but on data: customer pricing that cannot be modeled, and an ERP that never syncs cleanly. Get those two right early and the rest of the build follows. The nine steps below are ordered so those decisions come first.
Step 1: Pick your B2B model
Start by defining who sells and who buys, because your model decides your catalog structure, pricing rules, and whether more than one seller lists products. This is the foundation every later step builds on.
- Manufacturer: sells to distributors or retailers, often with configurable products and large part-number catalogs.
- Wholesaler or distributor: carries many brands, prioritizes fast reorder and account-specific pricing.
- Brand-owned wholesale portal: runs alongside a DTC site on a subdomain such as wholesale.brand.com.
- Multi-vendor marketplace: several sellers under one roof, with vendor onboarding and commission logic.
Write down your model before anything else. A distributor build and a marketplace build diverge sharply from this point.
Step 2: Decide whether to build or buy
Most mid-market wholesalers should buy a wholesale-native platform rather than build from scratch, because a SaaS platform ships pricing, ERP sync, and a rep app out of the box, while a custom build recreates all of it at higher cost and risk. Choose based on how unusual your workflow is and how much engineering you want to own.
| Path | Time to launch | Best for | Trade-off |
|---|---|---|---|
| Wholesale-native SaaS | Weeks | Most wholesalers and distributors | Confirm your specific ERP connector depth |
| DTC platform + B2B add-on | Weeks to months | Brands already running DTC | Pricing and assortment logic can hit a ceiling |
| Enterprise open-source | Months | Large catalogs with in-house developers | High build and maintenance cost |
| Custom / headless | Months to a year | Genuinely unique workflows | Longest, most expensive, ongoing engineering |
Note what a modern SaaS build removes: you no longer choose hosting or a theme and wire them together. Those legacy steps disappear when the platform is purpose-built.
Step 3: Choose the platform
Choose the platform that models your pricing and connects to your ERP without custom engineering, then earns adoption from reps and buyers. Score options on fit, not feature count: pricing-model fit, ERP integration, branding control, buyer self-service, payment terms, and total cost.
For a full head-to-head of vendors, see the best B2B e-commerce platforms. The short rule: if wholesale is your core business, a wholesale-native platform will fit better than a consumer tool with a B2B add-on.
Step 4: Map your catalog and pricing rules
Before migrating a single SKU, document every price list, customer tier, per-account assortment, MOQ, and case pack, because pricing is the hardest thing to retrofit later. This is the step most teams underestimate.
- List each customer tier and the price list it maps to.
- Define public, MSRP, or hidden-price mode per catalog.
- Record MOQs, case-pack quantities, and unit-of-measure rules.
- Note which accounts see which products (per-account assortments).
Treat pricing as a data model, not a spreadsheet. When it lives as structured rules, the platform applies the right price automatically at login instead of your team switching lists by hand.
Step 5: Connect your ERP and back-office systems
Set up a bidirectional sync so products, prices, and inventory flow from the ERP into the site and orders flow back out, keeping the ERP as the single source of truth. This is the difference between a site that stays accurate and one that shows stale stock.
Plan the sync for your specific systems (NetSuite, QuickBooks, Sage, Microsoft Dynamics) and confirm it runs in near real time with a visible sync history so failures are caught early. For the detail on connectors and data flow, see B2B e-commerce ERP integration.
Step 6: Build buyer portals and approval flows
Configure the logged-in buyer experience: account signup with approval, tax-certificate capture, sub-users per account, and a self-service dashboard with order history, invoices, and one-click reorder. This is what moves routine work off your reps.
- Route new buyers through an approval workflow before pricing is exposed.
- Collect a resale or tax certificate at signup.
- Allow multiple users per buyer account, with role-based permissions.
- Give buyers full order history, tracking, and reorder in a click.
Step 7: Add a sales-rep ordering workflow
Add a mobile order-writing path for reps alongside buyer self-service, because reps still write a large share of wholesale orders, including at trade shows and on customer visits. A buyer-only portal ignores half of how wholesale orders actually get placed.
The rep workflow should apply customer-specific pricing and case packs automatically, work offline when connectivity is poor, and sync to the same system once back online, so rep-written and buyer-placed orders live in one place.
Step 8: Launch and migrate
Migrate catalog, customers, pricing rules, and order history, preserve SEO with 301 redirects, then pilot with a handful of buyers before full rollout. A staged cutover prevents the pricing-rule loss and broken links that derail rushed migrations.
- Export and map catalog, customer, pricing, and order-history data.
- Set 301 redirects from old URLs and resubmit your sitemap.
- Pilot with 5 to 10 friendly buyers, then roll out in waves.
For the full cutover sequence, use the replatforming and migration checklist.
Step 9: Optimize and personalize
After launch, layer on search, recommendations, and personalization, and measure the metrics that matter in B2B: reorder rate, buyer activation, and average order value by account. The build is not finished at launch; adoption is the real goal.
Add account-specific landing content, reorder prompts based on history, and improved search over time. For the ongoing checklist, see B2B e-commerce best practices, and for layout and UX, B2B e-commerce website design.
How long does it take to build a B2B e-commerce website, and what does it cost?
A B2B e-commerce website takes a few weeks to launch on a SaaS platform or several months for a custom build, and costs anywhere from a few thousand dollars a year to six figures. The variable that moves both numbers most is ERP integration.
| Path | Typical timeline | Cost profile |
|---|---|---|
| Wholesale-native SaaS | 2 to 8 weeks | Predictable annual subscription |
| DTC platform + B2B add-on | 1 to 3 months | Subscription plus app and setup fees |
| Enterprise open-source | 3 to 6 months | High build plus ongoing maintenance |
| Custom / headless | 6 to 12 months | Highest upfront plus ongoing engineering |
The honest cost comparison is against your manual work today: hours spent rekeying orders, fixing wrong prices, and answering “where is my order” emails. For most wholesalers, that manual cost is the larger number.
How do you build a B2B e-commerce website that handles bulk wholesale orders?
To handle bulk wholesale orders, the site needs case-pack and MOQ enforcement, bulk-add-to-cart by SKU or CSV, unit-of-measure options, and customer-specific pricing applied across large orders. A consumer checkout built for single items breaks on a 200-line wholesale order.
Look for a B2B e-commerce website tool that can handle bulk wholesale orders through a quick-order form (paste or upload SKUs and quantities), saved order templates for repeat buyers, and a cart that enforces case packs and MOQs without manual correction. This is one of the clearest dividing lines between a wholesale-native platform and a retrofitted consumer store.
What are the most common B2B e-commerce website development mistakes?
The most common mistakes are building on a consumer platform that cannot model tiered pricing, skipping ERP integration, treating the rep workflow as an afterthought, and rushing migration without redirects. Each one surfaces after launch, when it is expensive to fix.
- Wrong platform: a DTC tool that cannot do per-customer pricing forces manual workarounds from day one.
- No ERP sync: duplicated product data drifts, and buyers see stale stock or wrong prices.
- Buyer-only thinking: ignoring reps means half your orders still bypass the site.
- Rushed migration: lost pricing rules and missing 301 redirects cost rankings and orders.
How WizCommerce shortens the build
WizCommerce is a wholesale-native B2B commerce platform that ships the hardest parts of the build (customer pricing, ERP sync, buyer portals, and a rep app) as core features, so most of the nine steps above are configuration rather than engineering.
- WizShop is the log-in-gated storefront on your own subdomain, with an edit-in-place CMS so the site carries your brand.
- Pricing and catalogs support many price lists, customer-specific and tiered pricing applied on login, and per-account assortments.
- ERP sync runs bidirectionally with NetSuite, QuickBooks, Sage, and Microsoft Dynamics. See the NetSuite e-commerce integration.
- WizOrder is the sales-rep app for writing orders on the road and at trade shows, including offline.
- AI tied to concrete jobs: Ella (AI Order Entry) turns inbound email, PDF, and spreadsheet orders into validated orders, and WizPay embeds ACH and net-terms payments in checkout.
FAQs on How to Build B2B E-Commerce Website
1. How do you build a B2B e-commerce website?
Build a B2B e-commerce website in nine steps: pick your B2B model, decide build vs buy, choose a platform, map catalog and pricing rules, connect your ERP, build buyer portals and approval flows, add a sales-rep ordering workflow, launch and migrate, then optimize and personalize. Pricing and ERP decisions come first because they shape every later step.
2. How long does B2B e-commerce website development take?
A few weeks on a SaaS wholesale platform, or several months for a custom or headless build. The biggest variable is ERP integration and how much pricing logic must be migrated.
3. Do I need a developer or agency to build a B2B e-commerce website?
Not if you buy a wholesale-native SaaS platform, where most of the build is configuration. A custom or headless build does require developers or an agency, which adds cost and time.
4. How much does it cost to develop a B2B e-commerce website?
From a few thousand dollars a year on SaaS to six figures for a custom build. ERP and systems integration is usually the largest single cost after the platform itself.
5. How do you build a B2B e-commerce website that handles bulk wholesale orders?
Use a platform with case-pack and MOQ enforcement, bulk add-to-cart by SKU or CSV, unit-of-measure options, and customer-specific pricing applied across large orders, so a big multi-line order does not need manual correction.
6. Should I build a separate B2B site or add B2B to my existing store?
Most brands run a login-gated wholesale portal separate from their consumer store, often on a subdomain, so wholesale pricing and assortments never appear publicly while both share catalog data.
