A US affiliate drives £18,000 in tracked revenue, sends a request for payment, and finance now has to decide what happens next: which tax form to collect, whether VAT applies, who issues the invoice, which currency to use, and how to prove the payment was approved. This is the operational reality behind how to pay US affiliates as an EU company. The bank transfer is usually the easy part. Creating a repeatable, auditable process is where programmes either scale or stall.
For a European brand, agency or SaaS platform paying a handful of US affiliates, a manual process can work briefly. At 50, 200 or 1,000 partners, chasing forms and reconciling one-off payments becomes a finance workflow, not a marketing task. The answer is to separate what you are paying for, who the legal payee is, and which party owns each tax and invoicing obligation.
Start with the affiliate’s legal and tax status
“US affiliate” is not a sufficient payment category. An affiliate may be a US individual, a sole proprietor using their own Social Security Number or Employer Identification Number, an LLC, a corporation, or a non-US person living in the United States. Each status affects the documents you should request and, potentially, the invoice and reporting route.
For a US person, the usual starting point is Form W-9. It captures the payee’s legal name, federal tax classification, address and taxpayer identification number. Collect it before the first payment where possible, not after a campaign has ended and leverage has disappeared. Validate that the account holder, contract party and payment destination are consistent with the information provided.
A W-9 is not, by itself, proof that your EU company must issue a US tax form. That depends on the payer’s role, payment flow, entity location and the type of reporting regime that applies. For example, Form 1099-NEC is generally associated with US business payers making certain non-employee compensation payments. Form 1099-K has separate rules for payment settlement entities and third-party networks. An EU brand paying directly from Europe should not assume either form applies automatically, but it should retain the data needed to assess its position with appropriate US tax advice.
If the affiliate is not a US person, do not ask them for a W-9 just because their audience is US-based. A different certification, often from the W-8 series, may be relevant. A single onboarding flow that distinguishes US persons from non-US persons prevents this common and costly documentation error.
Define what the payment is for before you pay it
Affiliate payments can look similar in a spreadsheet while being legally different. A percentage of tracked sales, a fixed fee for a newsletter placement, a bonus for hitting a conversion target and reimbursement of production costs may need different treatment in your agreement and accounting records.
Your contract should state the commission calculation, attribution window, refund and chargeback treatment, payment threshold, payment date, currency, and evidence used to resolve disputes. It should also state whether the affiliate acts as an independent contractor and is responsible for their own income taxes. This does not replace legal classification tests, but it removes ambiguity over the commercial relationship.
For example, if your terms pay 12% of net revenue 30 days after the end of each month, define net revenue precisely. Is it revenue excluding VAT? Are cancelled orders deducted before or after the commission is calculated? Are foreign-exchange fees removed from the base? Without these definitions, a £4,000 commission can produce a disproportionate amount of back-and-forth between marketing, finance and the affiliate.
VAT: treat US affiliate services as a tax question, not an afterthought
For EU businesses, the VAT treatment of affiliate marketing services often depends on the supplier’s status and the place-of-supply rules in the country where your business is established. Where a US business supplies services to an EU VAT-registered business, the recipient may need to account for VAT under the reverse-charge mechanism. The US supplier will typically not charge EU VAT, but that does not mean the transaction disappears from your VAT process.
The position can differ if the affiliate is an individual rather than a business, if the service is bundled with another deliverable, or if local rules create a specific exception. Your finance team should therefore capture the affiliate’s VAT or business status at onboarding and route transactions through the correct tax code. Do not force a US individual to provide an EU VAT number they do not have.
This is also where invoice ownership matters. If every affiliate must issue their own invoice, your team needs a workable policy for US invoices from individuals and businesses, missing purchase order references, differing date formats and incomplete descriptions. If an intermediary is the contractual counterparty and merchant of record, it can issue the relevant documentation and consolidate the client-side accounting flow. The right model depends on your programme design, but the decision should be deliberate.
Build a payment workflow that survives volume
A reliable payout process has four controls: verified onboarding, approved earnings, payment execution and reconciliation. Missing any one of them creates either fraud exposure or month-end chaos.
During onboarding, collect identity details, tax status, the appropriate tax form, payment method and consent to the programme terms. Run proportionate KYC and sanctions checks, particularly where the same affiliate account, bank details or tax number appears across multiple profiles. It is much cheaper to block a suspicious payee before payment than to recover funds after a transfer has settled.
Next, lock the earnings data. Affiliate software may calculate clicks and commissions, but finance needs an approved payable amount. Establish a cut-off date, account for returns and fraud holds, then create a payment batch that cannot be changed without an audit trail. Marketing can approve commercial performance; finance can approve the release of funds. That separation protects both teams.
For payment execution, give affiliates choices that fit the region and the amount. ACH is often practical for US dollar payments to US bank accounts, while international wire transfers can be appropriate for larger payments or specific banking arrangements. Payment platforms may offer local methods, but fees, delivery times and beneficiary checks vary. Make clear whether the affiliate receives USD, whether conversion costs are deducted, and what happens if bank details are incorrect.
Finally, reconcile each payout against the approved commission record, payment reference, fee and settlement status. A payment marked “sent” is not always received. Failed transfers, returned payments and beneficiary-name mismatches need an owner and a defined resolution path.
How to pay US affiliates as an EU company at scale
At scale, direct payments create a long tail of small operational tasks: collecting W-9s, handling invoice exceptions, updating bank details, responding to “where is my payment?” requests and producing evidence for auditors. The cost is not only bank fees. It is the internal time spent turning fragmented affiliate data into a controlled accounts-payable process.
There are two common operating models. In a direct model, your EU entity contracts with each affiliate, calculates the commission, collects their documentation, receives or manages their invoice and sends the payout. This gives you close control, but your team owns every exception.
In an outsourced model, a specialist payment infrastructure provider sits between your business and the affiliate for payment, invoicing and compliance operations. Your team submits an approved batch, while the provider manages payee onboarding, tax documentation, payment methods and creator-facing support within the agreed scope. You receive one consolidated invoice rather than hundreds of supplier records. This model is particularly useful when affiliates include individuals who do not operate through a company.
Zexel Pay is designed for this second model: batch payouts across more than 150 countries and 30 currencies, with approval workflows, tax documentation and invoice handling managed through a single operational layer. It is not simply a faster way to send money. The value is reducing the number of legal, tax and accounting relationships your internal team has to administer.
Keep US reporting and European reporting separate
A recurring mistake is treating all compliance as a single “US tax” task. Your obligations may sit across several layers: local VAT accounting in your EU country, corporate record-keeping, AML and sanctions controls, US tax data collection, and platform-reporting rules where applicable.
DAC7, for instance, can apply to certain platform operators that facilitate relevant activities and meet the directive’s scope conditions. It is not automatically triggered because a company runs an affiliate programme or pays US creators. Similarly, collecting a W-9 does not make every EU payer responsible for a 1099 filing. Scope, role and jurisdiction matter.
Keep a clear record of the analysis behind your process, refresh it when your programme expands into new countries or payment models, and obtain specialist advice for your specific structure. A policy that was reasonable for ten US affiliates may be inadequate once a marketplace is facilitating thousands of payees.
The practical goal is simple: your affiliate should see a transparent commission calculation and receive payment on time; your finance team should see an approved batch, complete documentation and a reconciled ledger entry. Build for that standard before the next successful campaign turns into 300 individual payment problems.
