How to Start Selling on Walmart as a Third-Party Seller

1. What a Walmart Third-Party Seller Actually Is

Walmart operates two kinds of inventory. First-party (1P) is inventory Walmart buys wholesale and resells itself — that is the retail supplier relationship, and it is not what most people mean when they say they want to sell on Walmart. Third-party (3P) is Walmart Marketplace: you own the inventory, you set the price, you keep the customer relationship, and Walmart provides the storefront, the traffic, and the checkout.

The structural detail that matters most: Walmart uses a single-product-page model. Multiple third-party sellers can offer the exact same item on one listing, and Walmart algorithmically decides which offer wins the Buy Box — the offer that appears by default with the "Add to cart" button. Price, shipping speed, seller performance metrics, and in-stock reliability all feed that decision. This is why sourcing decisions on Walmart are competitive decisions, not just margin decisions: a listing with three sellers behaves very differently from the same listing with fifteen.

Third-party sellers on Walmart broadly fall into a few models: online and retail arbitrage (buying from retail or wholesale sources and reselling), wholesale (buying case packs from distributors or brands), private label (your own brand and listings), and dropship-style suppliers. All four use the same Marketplace account type. What differs is where your inventory comes from and how much of the listing you control.

2. Eligibility: What Walmart Actually Requires in 2026

Walmart Marketplace is an approval-based platform, not an open signup. You apply, Walmart reviews, and a meaningful share of applications get rejected or stalled. The requirements are not secret — most rejections come from applying with incomplete or mismatched information rather than from failing a hidden bar.

What you need before you start the application:
•     A registered business entity. An LLC or corporation, not a personal account. The legal name on your application must match your tax and banking documents exactly — a mismatch here is the single most common cause of a stalled application.
•     A Business Tax ID (EIN). A Social Security number is not accepted in place of an EIN.
•     A W-9 (US) or W-8 (non-US) form filed under that same legal entity name.
•     A verifiable business address that matches your EIN registration.
•     A US bank account for payouts (Walmart pays out on a recurring cycle, so this must be set up correctly before you can be paid).
•     Catalog details: your primary product categories, an estimate of your SKU count, and GTIN/UPC coverage. Walmart wants to know what you plan to list, not just that you exist.
•     An ecommerce track record. Walmart asks about your history on other marketplaces or your own store. A demonstrable sales history strengthens the application considerably.

What gets you rejected: a catalog that leans on restricted or prohibited categories, no verifiable ecommerce history, an inability to fulfill orders within Walmart's delivery expectations, or documentation that does not line up across entity name, EIN, and bank account. Read Walmart's Prohibited Products Policy before you apply, not after.

How long approval takes: plan for anywhere from a few days to a few weeks. Clean, complete applications with a real ecommerce history and unambiguous documentation move fastest. Then account for onboarding after approval — profile setup, payout configuration, shipping templates, and your first listings — which is real work, not a formality. Realistically, budget several weeks from application to first live order.
Click here to sign up to Walmart Marketplace!

3. Understanding the Fee Structure

Walmart's fee model is the reason many sellers move over from other marketplaces: there is no monthly subscription fee and no per-listing fee. You pay when you sell.

Referral fees. Walmart takes a referral fee on each sale, calculated as a percentage of the total sale price. The percentage varies by product category — consumer electronics, apparel, home, and jewelry are all treated differently, and some categories use tiered rates based on the item's price. Do not plan your margins around a single blanket percentage; look up the current rate for the exact category you are listing in. Getting this wrong by even a couple of points is the difference between a profitable SKU and a loss.

WFS fees. If you use Walmart Fulfillment Services, you additionally pay a per-unit fulfillment fee based on item size and weight, plus monthly storage fees that increase for long-tenured inventory. These stack on top of the referral fee.

The practical takeaway is that "sale price minus cost of goods" is not your margin — it is a fiction until you subtract the category referral fee, the fulfillment cost, and returns. Calculate the real number per item, before you buy. For a full category-by-category breakdown, see our complete guide to Walmart seller fees. If you want the math done live on the product page instead, Marter runs a profit and fees calculator with a WFS vs seller-fulfilled toggle directly on Walmart.com — $24/month, single plan, everything included.

4. WFS vs. Seller-Fulfilled: Choosing Your Model

Every third-party seller on Walmart has to answer one question early: who ships the box?

Walmart Fulfillment Services (WFS). You send inventory into Walmart's fulfillment network. Walmart stores it, picks, packs, ships, and handles customer returns. Your listings get fast-shipping treatment, which is a real Buy Box advantage — delivery speed is one of the inputs Walmart weighs when awarding the box. The trade-off is cost: per-unit fulfillment fees and ongoing storage fees, which get expensive for slow-moving or oversized inventory.

Seller-fulfilled (SF). You hold inventory and ship every order yourself, against Walmart's delivery-speed expectations and performance metrics (on-time delivery, valid tracking, cancellation rate). You keep the margin WFS would have taken, and you avoid storage fees entirely — but you own the labor, the packaging, the carrier relationship, and the returns.

How to choose. WFS tends to win on fast-moving, standard-size, competitive listings where the Buy Box is contested and shipping speed decides it. Seller-fulfilled tends to win on oversized items, low-velocity SKUs where storage fees would eat you alive, high-margin items where you can absorb the labor, and any product with unusual handling requirements. Most established sellers end up hybrid: WFS for the velocity SKUs, self-fulfilled for the long tail.
For a deeper comparison against Amazon's equivalent, see: WFS vs. FBA: Which Fulfillment Service Will Boost Your Profits?

5. Your First Steps After Approval

Approval is the starting line, not the finish. Here is the order of operations that gets you to your first sale fastest.

1. Finish the Partner Profile. Company information, customer service contact, shipping policy, and returns policy. Walmart will not let you go live with an incomplete profile, and a thin profile costs you buyer trust on every listing.
2. Configure payouts and shipping templates. Bank account verification and shipping templates (which regions, which speeds, which costs) determine whether your offers even display correctly. Get these right before you list, not after.
3. Source before you list. This is where new sellers lose money. Do not list what you happen to have — list what the data says will sell profitably. Check price history, offer count, and the fee-adjusted margin on every candidate SKU. Marter's product research surfaces live sellers, stock counts, offer count and lowest-price graphs, and real profit math on the Walmart page itself.
4. Create your listings. If the item already exists on Walmart, you match against the existing GTIN/UPC and add your offer. If you are creating a new listing, you own the title, bullets, description, images, and attributes — and those directly drive whether the listing ranks at all.
5. Price for the Buy Box, not for the spreadsheet. Price is one of the strongest Buy Box signals. Undercutting blindly starts a race to the bottom; pricing above the field with slower shipping loses the box entirely. Watch the offer count on your listings — a listing that goes from three sellers to twelve is a margin problem forming.

6. Optimize for search. Getting the offer live is not the same as getting seen. Title structure, attribute completeness, image count, and content quality all affect where you land in Walmart search results. Our guide on how to rank higher on Walmart covers exactly what moves the needle.

6. Sourcing and Data: The Part Most New Sellers Skip

A product that looks profitable today is not the same as a product that is durably profitable. A $26 listing you can source at $13 looks like an obvious buy — until you learn the item traded around $19 for the last year and the current price is a stockout artifact that will vanish in three weeks. At $19, after the category referral fee and WFS fees, that "winner" is break-even.

So before committing capital to any SKU, answer three questions: What has this item actually sold for over time? (price history, not today's snapshot). Is the competition growing or shrinking? (offer count trend — a rising seller count compresses margin regardless of what the price line does today). What is my real margin after fees? (category referral fee plus fulfillment, not sale price minus cost).

Worth knowing if you are coming from Amazon: Keepa does not track Walmart. It is an Amazon-only tool, and it costs €29/month. Walmart needs Walmart-native data. For long-run price and offer-count history on Walmart listings, Histomart charts it on the product page. For the live layer — current sellers, stock counts, profit and fee math, and alerts when prices or offer counts move — Marter runs on the same page for $24/month, one plan, all features included.

7. Growing Your Store

Once orders are flowing, growth on Walmart is mostly about defending margin and protecting your seller metrics:
•     Protect your performance metrics. On-time delivery, order defect rate, and cancellation rate feed both Buy Box eligibility and account standing. A single stretch of late shipments can cost you the box across your whole catalog.
•     Optimize listings continuously. High-quality images, complete attributes, and keyword-relevant titles improve both search placement and conversion.
•     Reprice deliberately. Track competing offers rather than reacting to every undercut. Not every listing is worth defending at zero margin.
•     Use Walmart's promotional tools. Sponsored placements and promo pricing can accelerate a launch, but only on SKUs with margin to spare.
•     Watch offer count as an early-warning signal. Competition arriving on your listing is visible before it shows up in your P&L.

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