The Merchant Account Compliance Guide
You opened a Stripe account under your U.S. LLC, entered your passport details, uploaded a formation certificate, and started taking cards. Eighteen months later a Form 1099-K arrives with an EIN on it, and it does not match the entity that filed the return. Everything in that sequence is governed by rules you can read in advance, and most of the failures happen at onboarding rather than at filing.
What a payment processor is doing, in tax terms
Strip away the product language and a processor occupies two distinct legal roles, sometimes both at once.
It is a payment settlement entity under IRC §6050W, which means it has an information reporting obligation with respect to payments it settles to you. In card transactions it acts as, or through, a merchant acquiring entity. In marketplace and platform arrangements it may instead be a third party settlement organization. Those two categories are subject to materially different reporting thresholds, which is the single most misunderstood point in this area.
It is also a customer of the banking system, subject to anti-money-laundering obligations that flow down to you as onboarding questions. Those questions come from the Bank Secrecy Act framework, not from the Internal Revenue Code, and answering them has no bearing on your tax filings. They are frequently mistaken for tax compliance.
Onboarding: where the beneficial ownership questions come from
When a processor asks you to identify every individual holding 25 percent or more of the entity, plus one person with significant control, it is not applying a policy of its own invention. That is the structure of the FinCEN customer due diligence rule at 31 CFR 1010.230, which requires covered financial institutions to identify and verify beneficial owners of legal entity customers under two prongs: an ownership prong reaching each individual who directly or indirectly owns 25 percent or more of the equity interests, and a control prong reaching a single individual with significant responsibility to control or manage the entity. Depending on the ownership structure, up to five individuals may need to be identified.
Three practical consequences follow.
- The 25 percent figure is a regulatory threshold for financial institution due diligence. It is not an ownership threshold that appears anywhere in your tax analysis, and it should not be used as a proxy for one.
- What you tell the processor becomes a record. If the ownership you certify at onboarding does not match the ownership reflected in your operating agreement, your capitalization table, and your tax filings, you have created an inconsistency in a durable file.
- Layered ownership does not remove the question. Indirect ownership counts.
This is separate from the Corporate Transparency Act beneficial ownership reporting regime, and the two are constantly confused. On March 26, 2025, FinCEN issued an interim final rule revising the definition of reporting company so that it reaches only entities formed under the law of a foreign country that have registered to do business in a U.S. State or Tribal jurisdiction. Entities created in the United States, and their beneficial owners, were exempted from the BOI reporting requirement. FinCEN indicated it intended to finalize the rule. Because that position arrived by interim final rule, confirm the current state of it before relying on it, and do not read it as affecting the customer due diligence obligations your bank and processor apply under 31 CFR 1010.230. Those are unchanged.
The documentation fork: Form W-9 or a Form W-8
Every account reaches a point where the processor asks for tax documentation. This is the fork in the road, and it determines the reporting that follows for the life of the account.
A U.S. entity, including a U.S. LLC owned entirely by a non-resident, certifies U.S. status on Form W-9 and supplies its EIN. The entity is a U.S. person for this purpose. Foreign ownership does not change that.
A foreign payee certifies foreign status on the appropriate Form W-8. Treas. Reg. §1.6050W-1 permits a payment settlement entity to rely on documentation on which it may treat the payment as made to a foreign person, applying the standards referenced in Treas. Reg. §1.1441-1(e)(1)(ii). Where that documentation is in place, Form 1099-K reporting is not required for those payments.
Founders sometimes submit a Form W-8 for a U.S. LLC on the theory that the owner is foreign. That is the wrong certification. The entity's status, not the owner's, controls, and an incorrect certification on a signed document is a poor position to explain later.
Form 1099-K: one form, two thresholds
The reporting threshold has moved repeatedly since 2021, and the current position is not what most published material from the intervening years describes.
For third party settlement organizations, the One, Big, Beautiful Bill retroactively reinstated the threshold in effect before the American Rescue Plan Act of 2021. A TPSO is not required to file Form 1099-K unless the gross amount of reportable payment transactions to a payee exceeds $20,000 and the number of transactions exceeds 200. Both tests must be met. The IRS set this out in a fact sheet issued October 23, 2025.
For payment card transactions, there is no de minimis threshold. The $20,000 and 200-transaction test in Treas. Reg. §1.6050W-1 applies to third party network transactions settled by a TPSO. A merchant acquiring entity settling card payments reports the gross amount regardless of size.
That distinction is the trap. A founder who reads that the threshold is $20,000 and 200 transactions, and concludes that a $9,000 card processing year is unreported, is applying the TPSO rule to a card acquiring relationship. Which category your account falls into depends on how the processor is structured for your arrangement, and it is worth asking rather than assuming.
Two further points. Gross amount means gross. The figure on the form is before processor fees, before refunds netting in the way you may expect, and before chargebacks, so it will rarely equal the revenue in your accounting system, and reconciling the difference is a normal part of preparing the return. And you may receive a Form 1099-K even where the payments fall below a threshold, because processors are permitted to report more than the minimum.
Backup withholding at 24 percent
IRC §3406 requires backup withholding when a payee fails to furnish a correct taxpayer identification number, or when the IRS notifies the payer that the number furnished is incorrect or that the payee has underreported. The rate is 24 percent. Payments reportable on Form 1099-K are within the scope of backup withholding.
The mechanism is worth understanding because of how it feels when it happens. There is no assessment, no notice of deficiency, and no opportunity to argue first. The processor simply withholds 24 percent of gross settlements and remits them. Recovering the amount means claiming it as a credit on a filed return, which for a calendar-year filer can be many months later. For a business running on payment settlements as working capital, that is a cash flow event rather than a tax event.
The usual precipitating causes are administrative: an EIN entered with a transposed digit, a legal name on the account that does not match the name on the IRS EIN record, or a name change that was made with the state but never with the IRS. The name and TIN must match the IRS record, not your letterhead.
When the account entity is not the filing entity
This is the downstream failure the article title points at, and it takes several forms.
The account is in the founder's personal name. The processor reports settlements against an individual, while the business reports the revenue on an entity return. The IRS matching systems see income reported to a person who did not report it. For a foreign-owned U.S. entity there is a second problem: payments running through the owner personally are transactions between the entity and its foreign owner, with the record-keeping and reporting consequences that attach under IRC §6038A.
The account belongs to a predecessor entity. Founders restructure, form a new entity, and leave the processor account attached to the old EIN. The Form 1099-K is issued against an entity that no longer files.
The account is held by an offshore entity while the operations are in the United States. Here the mismatch is not clerical. It raises whether the income is effectively connected with a U.S. trade or business, which IRC §864(c) resolves by reference to the activities actually conducted in the United States. The location of the merchant account is not the test, in either direction. Holding the account offshore does not move the activity, and holding it in a U.S. entity does not by itself establish a U.S. trade or business.
Correcting a mismatch after the fact means an amended information return from the processor, or a reconciling position on the return, or both. Neither is difficult. Both are avoidable by getting the entity right at onboarding.
A pre-launch sequence
Run these in order before the first live charge, not after the first Form 1099-K.
- Fix the operating entity, and confirm its legal name exactly as it appears on the IRS EIN confirmation letter.
- Open the processor account in that entity's name, with that EIN, and nowhere else.
- Decide the tax documentation question deliberately. A U.S. entity files Form W-9. A foreign entity files the applicable Form W-8. The entity's status controls.
- Reconcile the beneficial ownership you certify at onboarding against the operating agreement and the capitalization table. Where they differ, fix the records before you certify, not after.
- Ask the processor, in writing, whether your arrangement is treated as payment card transactions or third party network transactions. That answer determines which threshold applies to you.
- Set a reconciliation routine that ties gross settlements, fees, refunds, and chargebacks to the general ledger monthly. The Form 1099-K figure should be a confirmation at year end rather than a surprise.
This is general information about how these reporting and documentation rules operate, not advice on a particular account. If a mismatch already exists between the entity on a processor account and the entity on the tax filings, the firm's diagnostic starts by mapping the settlement flows against the returns actually filed. Related material sits on the international tax matters pillar.