B2B customer cabinet MVP: 7 screens partners actually open

“We’ll build a customer cabinet — partners will order themselves.” Six months later Figma has 30 screens, production has a pretty dashboard, and dealers still ping WhatsApp: “Do you have SKU X, and when does it ship?” The failure is not design. The MVP tried to ship a dream portal instead of the seven screens people actually open.

Below is a frame for CEOs and sales leaders: the B2B customer cabinet MVP, what to defer, budget/timeline ranges, and an acceptance checklist before you pay the vendor.

Why a cabinet if you have managers and Excel

Managers do not scale: 50 active dealers × “in stock?” × “send the invoice” burns hours and breaks prices. Excel fails on versions and access control. A cabinet exists so self-service covers 60–80% of routine requests: repeat order, status, document.

If pain already lives in sheets and chats, see when Excel no longer works. Here the focus is the MVP composition for external clients.

Seven MVP screens

1. Login and roles. Auth, password reset, at least two roles: “can order” and “view only.” A dealer sees their price list and documents — not someone else’s.
2. Catalog / stock. Search, filters, stock as “yes / low / no” or quantity with an agreed lag. Without stock the cabinet becomes a brochure plus a phone call.
3. Cart and order. Qty, line comments, credit limit or minimum order if that is a business rule. “Reorder last” saves half the clicks.
4. Order status. List and detail: accepted → packing → shipped → closed. ERP number if you have one. Without status, sales becomes a call center again.
5. Documents. Invoices, delivery notes, acts, specs — PDF from the cabinet. The partner’s accounting should not wait for “see attachment.”
6. Price and terms. Current (or personal) price list, payment terms, ship-to, account manager contacts. One screen of truth instead of “latest file in chat.”
7. Support. Ticket or form: topic, order, reply status. Not necessarily WhatsApp-inside — a tracked “received / in progress / closed” is enough.

That is the MVP. Anything that does not help login → order → download a document belongs in the backlog.

Defer to v2 on purpose

• AI recommendations, personal storefronts, heavy BI.
• Native mobile apps (responsive / PWA often enough).
• Full messenger inside the cabinet.
• White-label for a distributor network and heavy multi-tenancy.
• Full two-way ERP sync “like a mini-ERP” in sprint one — often enough: stock and status from accounting, order into accounting or to a manager via an agreed channel.

Timeline and money (ranges)

Payback is simple: manager hours per month on “in stock?”, “send invoice”, “where is my order?” × loaded cost. If the cabinet removes half of that, payback is often quarters, not years.

Common estimate mistakes

• “Design the whole portal first” — 40 mockups, zero working order. Start with one end-to-end path on seven screens.
• “Catalog like a marketplace” — B2B needs stock, units, pack size, personal price — not an endless recommendation feed.
• “ERP integration later” — without stock and status nobody trusts the cabinet; lock exchange in Discovery.
• “One role for everyone” — partner accounting sees competitor buy prices, or the buyer cannot place an order.
• “Native app in the MVP” — separate contract; first prove the same seven screens work on a phone browser.

Acceptance checklist

• Dealer logs in and sees only their price list and orders.
• Order gets an ERP number or an agreed “accepted by sales” status.
• Shipment status updates without a phone call (at least within the sync window).
• Invoice / delivery note downloads from the cabinet.
• Stock is not wrong longer than the agreed window (hour / day — write it down).
• Roles exist for view-only and ordering.
• A typical reorder works on a phone.
• Admin can revoke a departed partner user’s access in minutes, not days.

Bottom line

A B2B customer cabinet pays off by section count only if dealers and buyers complete order and document flows themselves. The seven screens above are a working MVP. Add the rest after WhatsApp stops being the primary order system.

Need a scenario review or an MVP for a dealer network — send a request. Services: web applications, corporate / partner portal.