Yes. An Estonian OÜ can invoice clients in any country, in any currency, with no restriction on where they are based. What changes is the VAT treatment: EU business clients get 0% VAT under the reverse charge, EU consumers pay Estonia’s 24% VAT until your combined EU sales cross a €10,000 threshold, and most clients outside the EU are invoiced with no EU VAT at all. The company itself never changes — only the invoice, and sometimes the paperwork your client asks for in return, changes by destination.
The short answer
An Estonian OÜ can invoice worldwide clients with no restriction on their country or currency.
EU business clients (B2B): 0% VAT under the reverse charge — both parties’ VAT numbers go on the invoice.
EU consumers (B2C): Estonia’s 24% VAT below a combined €10,000 threshold; the customer’s own country rate above it, filed quarterly through OSS.
Non-EU clients, business or consumer: usually invoiced with no EU VAT at all.
US clients typically request a Form W-8BEN-E, not a W-9 — it documents your foreign status, not VAT owed.
You may need an Estonian VAT number sooner than the €40,000 threshold: reverse-charge B2B invoicing to EU clients usually requires one regardless of turnover.
Verified: August 2026
Does my Estonian company limit which countries I can invoice?
No. Nothing in Estonian company law, and nothing about how you get paid, limits which country a client can be in. An OÜ registered in Tallinn can bill a client in Toronto, Tokyo or Tallinn itself on identical terms. Payment usually runs through an EMI — Wise, Payoneer or Revolut Business — rather than a traditional bank, since Estonian banks often decline pure non-residents. These accounts also invoice and receive in multiple currencies from one login, so billing a US client in dollars and an EU client in euros from the same OÜ is routine, not a workaround. What actually changes per client is narrower than people assume: the VAT you charge (or don’t), what the invoice must say, and occasionally a form your client’s own country wants from you, like a US W-8BEN-E.
What actually changes when I invoice a client abroad?
Two questions decide everything: is the client a business or a consumer, and are they inside or outside the EU? Those two answers set the VAT rate, whether you charge VAT at all, and what the invoice must say. Picture the same consulting fee sold three ways: to a German agency, it’s reverse charge at 0%; to a German consumer, it’s 24% Estonian VAT, or the German rate once you’re over the OSS threshold; to a Canadian client, it’s 0% and outside the scope of VAT entirely — same service, three different invoices. This is true whether you’re a solo consultant, a design studio or a SaaS company; the rules attach to the transaction, not the industry. Get the client type wrong and you either overcharge VAT you shouldn’t collect or undercharge VAT you owe.
How do I invoice an EU business client (B2B reverse charge)?
You charge 0% VAT and let the customer self-account for it in their own country — this is the reverse charge, and it applies whenever both companies are VAT-registered businesses in different EU states. The invoice must show both parties’ VAT numbers and a note that VAT is reverse charged; no VAT amount appears on the line. These sales also need to be reported separately on an EU recapitulative statement, on top of your normal VAT return — a second filing habit many founders don’t expect. Because reverse-charge invoicing requires proving your VAT status to the client, Estonia typically expects you to hold an Estonian VAT number to issue these invoices correctly, even if your total turnover is well under €40,000. Skipping this step is one of the most common EU invoicing mistakes founders make.
How do I invoice an EU consumer (B2C)?
Below a combined €10,000 in EU cross-border B2C sales per year, you charge Estonia’s 24% VAT and put your Estonian VAT number on the invoice — one rate, one number, no complications. That €10,000 figure is combined across every EU country you sell into, not a per-country allowance, so it’s easy to cross without noticing if you’re selling into several markets at once. Cross it and you switch to the OSS scheme: charge the VAT rate of the customer’s own country, but keep filing and remitting through a single quarterly return via e-MTA rather than registering in each country separately. Registering for OSS is a one-time step; after that, your invoicing software just needs the right rate table. OSS never covers domestic Estonian sales or B2B — those follow the rules above instead.
How do I invoice a client outside the EU?
For most non-EU clients, business or consumer, you charge no EU VAT at all. Non-EU business clients fall outside EU VAT because the place of supply is wherever they’re established — the invoice states that VAT is outside the scope, not reverse charged, since reverse charge is specifically an EU mechanism. Non-EU consumers work the same way for most professional and digital services: consulting, design, marketing, engineering, legal, accounting, data processing and software or SaaS access. For these categories, the place of supply shifts to the customer’s own country, so no EU VAT applies there either. The exception is a narrower set of physical or on-the-spot services that don’t fall into that list — if your service isn’t clearly professional or digital, confirm the treatment with your accountant before assuming it’s automatically VAT-free.
Consider an Estonian consultancy invoicing a manufacturer in Canada, a freelance client in Germany and a SaaS subscriber in Brazil in the same month — three invoices, three VAT treatments, one company.
Customer type at a glance
The table below is the reference most founders actually reach for — bookmark it before your next invoice run.
Customer type | VAT charged | What must appear on the invoice |
|---|---|---|
EU business (B2B) | 0% — reverse charge | Both parties’ VAT numbers; a note that VAT is reverse charged; no VAT amount shown |
EU consumer (B2C), below €10,000 combined sales | Estonia’s 24% | Your Estonian VAT number; the 24% VAT rate and amount shown |
EU consumer (B2C), above €10,000 combined sales | Customer’s country rate, via OSS | The customer-country VAT rate and amount; your Estonian VAT/OSS registration number |
Non-EU business (B2B) | 0% — outside the scope of EU VAT | A note that the supply is outside the scope of EU VAT; the customer’s own tax ID if they have one, e.g. a US EIN |
Non-EU consumer (B2C), most professional/digital services | 0% — outside the scope of EU VAT | Same outside-scope note; confirm treatment separately for services outside that category |
What must appear on every invoice, no matter the destination?
A handful of elements belong on every invoice you issue, regardless of who’s on the other end:
Your OÜ’s legal name, address and registry code
Your Estonian VAT number, where one applies to the transaction
A sequential invoice number and the issue date
A clear description of the service and the period it covers
The amount and currency — Estonian VAT law doesn’t require euros; invoice in USD, GBP or otherwise if that’s what you’re paid in
The VAT rate and amount, or the reverse-charge / outside-scope note that replaces it
The customer’s name, address and VAT number, where the transaction requires one
Get any of these wrong and the invoice is still valid commercially, but it won’t hold up cleanly if EMTA or your client’s own tax authority ever reviews the transaction.
When do I actually need an Estonian VAT number?
Four separate triggers can put you in the position of needing a VAT number, and only one of them is the turnover threshold most founders have heard of. You must register once domestic taxable turnover passes €40,000 a year. You can register voluntarily below that, and many service exporters do, mainly to reclaim input VAT on Estonian costs like accounting and software. You typically need one to issue reverse-charge invoices to EU business clients, regardless of turnover. And you need one to enrol in OSS once your EU B2C sales cross €10,000 combined. Registering for VAT is a single e-MTA application in every case — the trigger just decides the timing, not the process.
What does a US client need from my Estonian company?
Most US clients will ask for a Form W-8BEN-E, not a W-9 — a W-9 is for US persons, and W-8BEN-E documents that you’re a foreign entity for US tax purposes instead. The current revision is dated October 2021, an authorized officer of the OÜ signs it, not an individual owner, and it stays valid through the last day of the third calendar year after signing. It certifies your entity type, your Estonian tax residency, and your claim under the US-Estonia tax treaty, which has applied since 1999. Line 9b asks for a foreign TIN; Estonia’s own registry code generally serves that purpose. Some US payers also ask for a US EIN even when the IRS instructions don’t strictly require one for a services claim — treat that as a common friction point, not a hard rule, and be ready to apply for one if a client insists.
Will a US client withhold tax from my invoice?
Usually not, if the work is performed from Estonia. Under the IRS sourcing rule, income from services is sourced to where the work is physically performed — services delivered from outside the US are foreign-source income, not the US-source income subject to the default 30% withholding on payments to foreign persons. That withholding risk shows up only if staff physically travel to the US to do the work, and even then only for the portion of time spent there. None of this removes the paperwork: without a signed W-8BEN-E on file, a cautious US payer will often withhold 30% defensively anyway, simply to protect itself as the withholding agent. If you sell directly to a large number of US consumers, state-level sales tax nexus is a separate, state-specific question — check the states where your customers are concentrated rather than assuming federal rules cover it.
What about goods, not services?
This article covers services — goods run on a different set of rules entirely. Selling physical products means import VAT, an EORI number, and often IOSS for consignments under €150, none of which apply to a consulting fee or a SaaS subscription. If you sell or plan to sell physical goods, dropshipping through an Estonian OÜ walks through that separately — the VAT logic in this article doesn’t transfer to a customs shipment. Marketplaces like Amazon add a further layer, since the platform itself can sometimes become responsible for VAT instead of you, depending on where you and your stock are established.
Common invoicing mistakes founders make
A handful of mistakes account for most of the problems Enty sees:
Charging Estonian VAT to an EU business client instead of reverse charge
Forgetting to switch to OSS rates after crossing the €10,000 threshold
Assuming “non-EU” means zero paperwork, then missing a client’s W-8BEN-E request
Issuing reverse-charge invoices before actually holding a VAT number
Quoting a single “worldwide VAT rate” — there isn’t one; it depends on the client every time
Forgetting the EU recapitulative statement that sits alongside reverse-charge invoicing
Frequently asked questions
Do I need a separate company for each country I invoice?
No. One Estonian OÜ can invoice clients in every country at once; there’s no requirement to set up a local entity just to bill a client somewhere else. A separate registration only becomes relevant if you build an actual physical presence there — an office, staff or stock — which creates its own tax footprint independent of invoicing, through permanent establishment rules rather than through the invoice itself.
What happens if I invoice an EU consumer before I register for OSS?
You’re still liable for VAT on that sale once you cross the €10,000 combined threshold, whether or not you’ve registered yet. Registering late doesn’t erase the obligation; it just means you account for the missed period once you do register, usually at a cost in time and paperwork you could have avoided. Register as soon as you can see the threshold coming, not after you’ve already crossed it.
Do I need a VAT number to invoice non-EU clients?
Not because of the non-EU client itself — most non-EU invoicing needs no VAT number at all. You may still need one for an unrelated reason, like domestic Estonian sales over €40,000 or reverse-charge invoicing to EU businesses, and once you have it, you simply don’t apply it to the non-EU invoice, since that transaction sits outside the scope of EU VAT regardless.
What’s the difference between reverse charge and “outside the scope of VAT”?
Reverse charge is an EU mechanism: VAT is still legally due, but the customer, not you, accounts for it in their own country. “Outside the scope” means EU VAT law simply doesn’t reach the transaction at all, which is the usual case for non-EU clients. Both result in 0% on your invoice; the wording you print differs because the legal basis behind each one is different.
Will my US client send me a 1099 or a 1042-S?
Neither, in most cases. Form 1099 is reserved for payments to US persons, and Form 1042-S covers US-source income paid to foreign entities — a foreign company billing for services performed entirely outside the US generates neither, because that income isn’t US-source in the first place. What the client wants instead is your signed W-8BEN-E, to document why no US withholding applies to the payment.
Do I need to charge VAT on SaaS sold to consumers outside the EU?
Generally no. Digital and professional services sold to consumers established outside the EU are typically taxed where the customer is, which puts the sale outside EU VAT entirely. This is one of the more consistently favorable rules for software and consulting businesses selling worldwide from an Estonian OÜ, and it applies without any threshold to cross.
What if a client claims to be a business but has no VAT number?
Treat them as a consumer for VAT purposes until they can produce a valid VAT number you can verify. A claim alone doesn’t qualify a client for reverse charge or B2B treatment — the VAT number is what the rules actually key off, and getting this wrong shifts a VAT liability onto your company, not onto them.
Can I invoice in US dollars or another foreign currency?
Yes. Estonian VAT law doesn’t require invoices in euros; you can bill in USD, GBP or any other currency your client uses, as long as the VAT amount, where one applies, can be converted to euros for your Estonian VAT return using the official exchange rate for that date. Most invoicing software handles this conversion automatically, so it rarely becomes manual work.
Does invoicing worldwide clients change my Estonian company’s annual report?
No extra report is triggered by having international clients — the same annual report, and the same monthly VAT and quarterly OSS returns, apply regardless of where your revenue comes from. What changes is the detail inside those returns: more customer countries, more rate lines, and a reverse-charge or OSS breakdown instead of a single domestic VAT line.
