Finding wholesale customers and serving them are two different software problems. The first is research and outreach. The second is order processing, and it starts the moment a buyer says yes, which is also the moment an Amazon seller discovers that Seller Central was doing more work than they realized.
On the marketplace, a customer pays before the box moves, tax is handled for you, the address is validated, the label is generated and the money lands on a schedule. In wholesale, a company sends a document, you agree to ship before being paid, you calculate tax or collect an exemption certificate, you follow someone else's shipping rules and you chase the payment yourself. This article maps the systems that make that survivable at each size.
The order path, end to end
Every wholesale order follows the same seven steps, regardless of how large the buyer is.
A quote or a price list goes out. A purchase order comes back with item numbers, quantities, a requested delivery date and terms. You acknowledge it, ideally the same day, confirming what you will actually ship and when. You allocate stock. You ship according to their routing rules, with the right labels and paperwork. You invoice against the purchase order number. You collect, and reconcile any deductions.
Each of those seven has a system somewhere behind it, even if the system is you and a spreadsheet. The failures cluster in three places: the acknowledgment that nobody sent, the invoice that does not match the purchase order, and the collection nobody chased. The commercial background to the second and third is in purchase orders for Amazon sellers.
Quoting and price lists
Wholesale prices are not one number. They are a base price with tiers by volume, sometimes a different tier for distributors than for retailers, occasionally a negotiated price for one account, plus allowances.
The system requirement is modest but strict: one source of truth, versioned, with an effective date. What you need to avoid is a buyer quoting a price from a sheet you emailed eight months ago while you are quoting the current one.
For a brand with fewer than a hundred accounts, a maintained document plus a note on each account record of what that account was quoted is enough. What is not enough is pricing from memory. The structure behind the tiers is in wholesale pricing for Amazon products.
If you also sell to business customers on the marketplace, that channel has its own quoting mechanism and its own pricing surface, which is worth keeping mentally separate from your direct wholesale prices, since a price visible to business buyers on the marketplace is visible to your retail accounts too.
Credit, terms and the decision nobody automates
Agreeing to net 30 is lending money. The software part is simple, the decision part is not, and an Amazon seller has never had to make it before because the marketplace pays everyone the same way.
What a system should give you: a credit limit per account, visibility of what is currently outstanding, aging of invoices by how overdue they are, and an alert before you ship into an account that is already past due. What it cannot give you is the judgment about whether a particular new account gets terms at all.
The workable default for a small brand is that a first order is prepaid or paid on delivery, and terms are granted from the second order once the company has behaved. Larger retailers will not accept that and will state their terms as a condition, which is a different negotiation, covered in payment terms with retailers.
Watch the aging report weekly. Receivables are the quietest way a growing wholesale channel runs a profitable business out of cash.
Invoicing, tax and exemption certificates
The invoice is the document that gets you paid, and it gets rejected for boring reasons: a missing purchase order number, the retailer's item number absent, a price that differs from the purchase order by a cent, or a quantity that does not match what their warehouse received.
Mirror their purchase order exactly. Their numbers, their descriptions, their terms, their remittance instructions. Where your system and theirs disagree, theirs wins.
Sales tax works differently than it does on the marketplace, where the platform calculates and remits. A sale to a retailer who will resell the product is normally exempt, but only if you hold a valid resale certificate for that customer, filed and current. Collect it during account setup rather than at the first invoice, and set a reminder for expiry. The details are in sales tax on wholesale for Amazon sellers.
For accounting, the thing to insist on is that wholesale revenue, allowances and deductions stay visible separately from marketplace revenue. Netting them together hides which channel actually earns.
Portals, EDI and when a retailer insists
Larger retailers do not want your email. They want you to connect to their system.
A vendor portal is a website where you see purchase orders, acknowledge them, print labels and submit invoices. No cost to use, tedious at volume, perfectly fine for a handful of orders a month.
Structured data exchange is the older and far more common requirement at chain scale: documents moving machine to machine in a fixed format, typically the purchase order, the acknowledgment, the advance shipping notice and the invoice. It is a compliance requirement rather than an efficiency choice, and a chain will make it a condition of doing business. What it involves for a brand your size is in structured data exchange for small brands.
A wholesale ordering site of your own is a different thing entirely: a place where your existing independent accounts log in, see their price tier and reorder without emailing you. It pays off when you have a base of repeat accounts reordering predictably, and it is premature before that.
Do not build for the requirement you might face. Meet the one you actually have, and treat the first chain that asks for a connection as the trigger.
Where fulfillment systems fit
The order has to physically move, and this is where an Amazon brand has a genuine choice to make.
Shipping wholesale orders out of marketplace inventory works for a small direct order and stops working at pallet scale, where you need pallet building, freight booking, a bill of lading and compliance with a routing guide. Pallet orders need a warehouse that can build and book them, and that is rarely the same operation that feeds your marketplace inventory.
Whichever path you take, the software requirement is the same: one inventory number that both channels draw from, and a way to commit stock to a wholesale order so it is not sold twice. Double-selling the same units between a marketplace listing and a signed purchase order is the most avoidable way to lose a new account.
A sizing guide, by how many accounts you have
| Accounts | Orders | Invoicing | Connections |
|---|---|---|---|
| Under 10 | Email and a spreadsheet | Accounting software template | None |
| 10 to 50 | Shared order tracker | Accounting software, aging watched weekly | A portal if asked |
| 50 plus | Order management with stock commitment | Automated invoicing from the order | Structured exchange for chains |
The upgrade trigger is never the account count on its own. It is a specific failure repeating: stock promised twice, invoices going out late, or a chargeback for a routing rule you missed. Fix the failure, not the category.
Before any of this matters, the accounts have to exist, and that is still the harder half. Paste your listing into WholesalePilot and the preview shows which distributors and retailers would plausibly stock your product, so the systems you build are sized against real demand rather than a guess.
Questions Amazon sellers ask about B2B systems
Can I just use my accounting software? For the first accounts, yes. It handles invoices and aging. What it does not handle is the order path before the invoice, or the account history before the order.
Do I need a wholesale ordering portal? Not until repeat accounts are reordering often enough that the emails are the bottleneck. Winning accounts comes first, and the tooling for that is in tools for wholesale.
What if a retailer requires a connection I cannot afford? Service providers sit between small suppliers and large retailers for exactly this, converting emails or spreadsheets into the required format for a monthly fee. It is usually cheaper than the first year of chargebacks.
How do I handle a deduction I disagree with? Dispute it in writing within their stated window, with the purchase order and proof of delivery attached. Deductions that are not disputed are treated as accepted.
Should marketplace and wholesale share one inventory pool? One physical pool with committed allocations is the practical answer. Two separate pools create stranded stock in whichever channel guessed wrong.