The playbook for international sellers on US marketplaces has been rewritten over the past two years. Duty-free small parcels are gone, verification is stricter, fees are higher, and platforms enforce documentation requirements that used to be theoretical.
None of that makes the opportunity smaller. It makes preparation matter more. Here are the five things that separate sellers who grow from sellers who stall.
Tip 1: Fix Your Structure Before You Fix Your Listings
Most sellers optimise the storefront and leave the legal and logistical foundations for later. That ordering is backwards, because structure determines what is possible.
Get these in place first:
- A US entity. It simplifies importing, banking, payment processing, tax handling and buyer confidence in one move. You can operate without one; you will spend the difference in friction.
- Importer of record capability. Somebody must be legally responsible for the goods entering the country. Sort out the customs bond, the identification number and the broker relationship before your first container leaves.
- Verified platform accounts. US marketplaces now verify business registration, beneficial ownership, bank details and address. Have documents ready and consistent — mismatched details are a common cause of suspended accounts.
- Category approvals. Restricted categories require applications and documentation. Start those early; approval timelines are measured in weeks.
A seller with clean structure can launch, scale and pivot quickly. A seller without it hits a wall at exactly the moment things start working.
Tip 2: Price From Landed Cost, and Recalculate Quarterly
The most common financial mistake international sellers make is building a pricing model on factory cost plus a shipping estimate.
Your real per-unit cost includes: ex-works price, inland transport, freight, insurance, duty, brokerage and entry fees, port and drayage charges, prep and labelling, inbound placement fees, fulfilment fees, referral fees, storage, returns allowance, advertising cost per unit sold, and payment processing.
Two disciplines follow from this.
First, model each SKU individually. Blended averages hide the loss-makers. It is normal for a third of a catalogue to be subsidising the rest.
Second, recalculate every quarter. Duty rates, freight rates and platform fees all move. A margin that was healthy in January can be negative by July without a single decision being made.
When a SKU no longer clears a minimum net margin, withdrawing it usually improves profitability faster than discounting it.
Tip 3: Hold Inventory Inside the United States
This is the highest-impact operational change available to an international seller.
Since low-value shipments lost their duty-free treatment, shipping individual orders from origin has stopped making sense for almost every product. Every parcel needs formal entry, and per-shipment fixed costs devastate small consignments.
Holding US stock — in a marketplace fulfilment centre, a third-party warehouse, or your own facility — gives you:
- Delivery speed that matches domestic competitors
- A workable returns address, which the platforms increasingly expect
- Consolidated import shipments, spreading customs costs across many units
- Protection against a single delayed container taking you out of stock
- The ability to serve marketplace, direct e-commerce and wholesale orders from one pool
The practical structure most sellers land on: fast-moving small items in marketplace fulfilment, everything else in a domestic warehouse, and a reserve buffer used to replenish the fulfilment centre.
Tip 4: Write Listings for American Buyers, Not for Translation
Listing quality is where international sellers most visibly lose ground, and the fixes are cheap.
Language. Have copy written or edited by a native US English writer. Buyers detect awkward phrasing instantly and read it as a risk signal. This applies to bullet points, descriptions, and — often forgotten — the packaging insert and instruction sheet.
Units and conventions. Use inches and pounds as primary, metric secondary. Use US date formats, US spelling and US sizing conventions.
Specification depth. American buyers in technical and institutional categories compare specifications. Give dimensions, weights, capacities, materials, standards and warranty terms. Vague claims lose to detailed ones.
Images that answer objections. Scale references, close detail on construction, packaging shots, in-use context. If buyers ask a question repeatedly, answer it in an image.
Backend completeness. Category attributes, compliance fields and search terms filled out properly improve discoverability more than most sellers expect, and cost nothing but attention.
Brand protection. Register your brand where the platform offers it. It unlocks enhanced content and gives you tools against listing hijackers, which international sellers are disproportionately targeted by.
Tip 5: Treat the Marketplace as One Channel, Not the Business
Platform dependence is the biggest structural risk international sellers carry. An account issue, a policy change or a fee increase can remove your entire revenue base in a day, and appeals from abroad are slower to resolve.
Build alongside it:
- Direct e-commerce. Better margins, owned customer relationships, no suspension risk. Use marketplace sales to fund it.
- Multiple marketplaces. Diversification across platforms costs less than most sellers assume once inventory sits in a US warehouse.
- B2B and wholesale. Marketplace visibility generates enquiries from distributors, institutions and commercial buyers whose orders dwarf retail volumes. Make sure there is a clear route for them to reach you.
- An owned audience. Email lists, content and search visibility on your own domain are assets no platform can suspend.
The marketplace is excellent at discovery. It is a poor foundation for a business that intends to last.
A Quick Self-Assessment
Score yourself honestly:
- Do you have a US entity and importer-of-record capability?
- Do you know your fully loaded landed cost per SKU, updated this quarter?
- Do you hold inventory in the United States?
- Has a native US English writer reviewed your listings?
- Does more than 20% of revenue come from outside your largest marketplace?
Fewer than three yeses means the fastest growth available to you is operational, not promotional.
The Underlying Point
International sellers on US marketplaces in 2026 are not competing on cleverness. They are competing on preparation. The requirements that make entry harder are the same requirements that thin the field — and every one of them is solvable with planning rather than luck.
PROMIXCO USA Corporation operates the group’s US e-commerce and global trade channel, pairing international manufacturing with a domestic entity for importing, warehousing, sales and support. To discuss your US marketplace strategy, contact us.
