Quick answer: Yes. Invoicing a US client from your Estonian OÜ needs no US entity, no US bank account, and in almost all cases no US tax filing. Business-to-business services supplied to a client outside the EU are generally outside the scope of EU VAT, so you charge no VAT and add no reverse-charge note. It’s the simplest VAT case an Estonian company can have. On the US side, your tax position depends on US rules, not Estonian ones: as long as you do the work from outside the US and have no fixed place of business or dependent agent there, you owe no US tax, and your client generally owes no withholding either. The one piece of paperwork you should expect is a Form W-8BEN-E, which your client will ask you to fill in and keep on file, not something you file with anyone yourself.
If you’re setting up invoicing for your first US client and want someone to sanity-check the paperwork, talk to our team. It’s a five-minute check that avoids a confused email exchange with your client’s finance department later.
Why “can I invoice” isn’t really the legal question
Nothing about an Estonian company requires you to limit yourself to EU or Estonian clients. An OÜ can invoice anyone, anywhere, in any currency the moment it’s registered. The actual questions worth asking are narrower and more useful: does this invoice need VAT on it, does it create any US tax exposure for your company, and what will your client’s own finance department expect from you before they’ll pay? Those are the three things this article actually answers.
The VAT side: why a US client is the simplest case you’ll have
EU VAT law places business-to-business services at the customer’s location for VAT purposes (the general B2B place-of-supply rule, Article 44 of the EU VAT Directive). For a client inside the EU, that triggers the reverse-charge mechanism: your invoice shows no VAT, and your client accounts for it themselves. For a client outside the EU entirely, including the United States, there’s no EU VAT system for your client to account for in the first place, so the supply simply falls outside the scope of VAT altogether. Practically: no VAT line on the invoice, no reverse-charge wording needed, and nothing to report through OSS (OSS exists for EU-wide B2C digital sales, which this isn’t). It’s worth contrasting this with selling to EU consumers, which is genuinely more complex. See our VAT guide for that side of things and our invoicing guide for what every invoice legally needs regardless of client location.
The US side: what your client will actually ask you for
US companies are required to work out, for every vendor they pay, whether that vendor is a US person or a foreign one, because the two are reported completely differently. For a foreign company, the standard way to do that is Form W-8BEN-E: your client sends it to you, you fill in your company’s details and certify that you’re a foreign entity, and they keep it on file. It does not get submitted to the IRS by you, and in the ordinary case of a services company with no US presence, it doesn’t trigger any US tax withholding either. Larger US companies with a formal accounts-payable process will usually ask for this before the first payment goes out; smaller clients sometimes only ask once their accountant flags it at year-end. Either way, having it ready before you send your first invoice avoids a delayed payment while someone in their finance team figures out what to do with a foreign vendor.
Does invoicing a US client create any US tax exposure for your company?
For most Estonian companies invoicing US clients, the answer is no, and the reasoning is the mirror image of the permanent-establishment logic that governs where you personally owe tax: a foreign company only owes US corporate tax if it has a US trade or business with a US permanent establishment: a fixed place of business or a dependent agent habitually concluding contracts there. Delivering services remotely to a US client, with no US office, no US employees, and no one signing contracts on US soil, doesn’t meet that bar.
Withholding tax is the other half of the question, and it’s simpler than people expect: the 30% US withholding that foreign vendors sometimes hear about applies to US-source income, broadly, income tied to work physically performed in the US, or to specific categories like US-source dividends, royalties, and interest. Payment for services you perform entirely from Estonia (or wherever you actually are) is foreign-source income from the US tax system’s point of view, so it isn’t subject to that withholding at all, treaty or no treaty. A tax treaty (Estonia and the US have had one in force since 1999) mainly matters here if some of your work is genuinely performed on US soil, or if your income is a type the treaty specifically addresses (royalties, for instance); for a standard remote services arrangement, most founders never need to invoke it. The W-8BEN-E is what lets your client document this cleanly on their end, including confirming they don’t need to issue you a Form 1099 (that form is for US persons only) or a Form 1042-S (that’s for US-source income actually subject to reporting).
What about US sales tax?
This is a different question from the one above, and it mostly doesn’t apply to a standard B2B services arrangement. US state sales tax and “economic nexus” rules are built around a seller crossing a state-specific threshold of sales or transactions to customers within that state, mostly relevant to businesses selling physical goods or digital products/subscriptions directly to a large number of US consumers, not to a single Estonian company invoicing one US business client for services. If your business model shifts toward selling a digital product directly to US consumers at volume, that’s worth a dedicated conversation with a US sales tax specialist. It’s a genuinely separate question from anything in this article.
Getting paid: currency and the accounting side
You can invoice a US client in USD, EUR, or whatever currency you agree on. Nothing about Estonian company law requires EUR-denominated invoices to clients. What does matter is your own bookkeeping: Estonian statutory accounts are kept in euros, so a USD invoice gets converted to EUR at the exchange rate on the date of the transaction (your accountant will typically use the European Central Bank’s reference rate for this, and Unicount’s accounting plans handle it automatically). Most founders invoicing US clients regularly end up using a multi-currency account. Wise Business and similar providers let you hold and receive USD directly, convert on your own schedule rather than at your bank’s rate, and still feed cleanly into EUR-based Estonian bookkeeping.
A practical example
A solo Estonian OÜ built around freelance development work takes on a US startup as a client, billing $6,000/month. The invoice carries no VAT, since the client is a B2B customer outside the EU. Before the first payment, the client’s finance team sends over a W-8BEN-E, which gets filled in once and reused for every future invoice. Payment arrives in USD into a Wise Business account, gets converted to EUR at the transaction-date rate for the Estonian books, and the founder owes no US tax on any of it, because all the work is done from outside the US and nothing about the arrangement creates a US permanent establishment. The only ongoing admin is the same VAT and corporate tax process that applies to any other client, plus keeping the W-8BEN-E on file in case it’s ever asked for again.
How Unicount helps
We can’t give US tax advice. If your situation gets more complex than the standard remote-services case above (a US subsidiary, US-based staff, and a large volume of US consumer sales), that’s a conversation for a US tax professional. What we do handle is the Estonian side end to end: VAT treatment set correctly on every invoice from day one, multi-currency bookkeeping that converts USD and other currencies properly for your statutory accounts, and accounting support that already knows what a US client relationship looks like on paper. If you’re about to send your first US invoice, talk to us, or register your Estonian company with Unicount if you’re setting one up with this exact use case in mind.
Frequently asked questions
Do I need to charge VAT on an invoice to a US client? No. Business services supplied to a client outside the EU are outside the scope of EU VAT entirely; no VAT is charged, and no reverse-charge note is needed. See our VAT guide for how this compares to EU-based clients.
What is a W-8BEN-E, and why is my client asking for one? It’s the form a US business uses to document that you’re a foreign company, not a US person, for its own tax-reporting purposes. You fill it in and send it to your client; they keep it on file. You don’t submit it to the IRS yourself, and it doesn’t create any obligation on your side.
Will my US client withhold 30% tax from my invoice? Almost certainly not, for a standard remote-services arrangement. The 30% withholding applies to US-source income, and income from services you perform outside the US is foreign-source income, which isn’t subject to it regardless of any tax treaty.
Do I need a US company or US bank account to invoice US clients? No. Your Estonian OÜ can invoice and get paid directly, in USD or any other currency, without any US entity or US-based bank account.
Will my US client send me a 1099? No. Form 1099 is for US persons. A W-8BEN-E on file is what tells your client’s accounting system you’re a foreign company and shouldn’t receive one.
Does this create a permanent establishment for my company in the US? Not from remote invoicing alone. A US permanent establishment generally requires a fixed place of business or a dependent agent regularly concluding contracts in the US. Delivering services remotely doesn’t meet that bar.
What’s the single biggest mistake founders make here? Assuming that invoicing a US client is automatically more complicated than invoicing an EU one. For VAT purposes specifically, it’s actually simpler. The complexity, where it exists at all, is entirely on the US paperwork side (the W-8BEN-E), not the Estonian one.
More to learn:
- VAT for your Estonian OÜ: the complete 2026 guide
- How to invoice clients from your Estonian OÜ
- Estonian OÜ vs UK Ltd vs Delaware LLC comparison
- Contact us
This article is for informational purposes only and does not constitute legal or tax advice. US tax treatment described here reflects general IRS rules on foreign vendors and foreign-source income and the US-Estonia income tax treaty as of October 2026; individual circumstances, especially anything involving US-based staff, offices, or large-volume US consumer sales, can change the analysis. Individual circumstances vary, so consult a qualified US tax advisor for anything beyond the standard remote-services case described above.
Last verified: October 2026 by Unicount.
