Estonian VAT Number: EE Plus 9 Digits, and When You Need It

An Estonian company does not get a VAT number when it is registered.

It gets one when it needs one, and a lot of e-resident companies never do.

The short answer

It is not your registry code

This is the single most common error, and it produces rejected invoices.

You cannot construct one from the other. Putting EE in front of your eight-digit registry code does not produce a valid VAT number. They are different numbers from different authorities.

If a customer asks for your VAT number and you are not registered, the correct answer is that the company is not VAT registered. It is not the registry code.

Registry code, from day one

123456788 digits, Business Register, automatic

VAT number, only once registered

EECountry prefix, required by VIES

1234567899 digits, Tax and Customs Board

Mandatory above 40,000 EUR of taxable turnover, and available voluntarily below it.

A new Estonian company has a registry code and no VAT number. That is normal, not an error.

When registration becomes mandatory

The trigger is 40,000 EUR of taxable turnover within a calendar year.

Three details that matter more than the number:

1. The clock is the calendar year, not a rolling twelve months
2. Once you cross it, you have three business days to register. That is a genuinely short window
3. The obligation attaches when you cross the threshold, not when you notice

What counts toward the threshold is taxable turnover, so the composition of your sales matters. Exports and certain exempt supplies are treated differently from domestic sales, and the arithmetic is not always obvious for a cross-border business.

The three-day rule is the part that catches people. Most tax deadlines give you weeks. This one assumes you are watching your turnover closely enough to see the threshold coming.

Registering voluntarily

You can register before reaching the threshold, and it is a real decision rather than an obvious win.

Arguments for:

• You recover input VAT on Estonian and EU purchases
• B2B customers in the EU often expect a VAT number as a credibility signal
• Cross-border B2B supplies work more cleanly with a valid number on both sides

Arguments against:

• Twelve KMD filings a year, permanently, including months with no activity
• Deregistration is not automatic and not instant
• If your customers are consumers, you are now adding VAT to prices you previously did not

For a small consulting company selling to businesses outside Estonia, voluntary registration frequently costs more in administration than it recovers.

What happens once you have one

The number itself is the easy part. The obligation attached to it is not.

• The KMD VAT return is filed monthly, by the 20th of the following month
• You file in months with zero activity. A nil return is still a return
• The obligation runs until you deregister, not until you stop trading

The full reporting calendar, including the payroll return and the annual report, is covered in our guide to Estonian bookkeeping obligations.

How to verify an Estonian VAT number

Two routes, both free.

VIES, the European Commission's validation service:

• Confirms whether the number is valid today
• Returns the registered name and address for most member states
• Works for any EU VAT number, not just Estonian ones
• Keep the consultation number it returns. It is evidence you checked

The Estonian Tax and Customs Board register, which gives Estonian-specific detail.

Three checks worth doing before treating a supply as B2B:

1. Validate the number, not the invoice. A number printed on a PDF proves nothing
2. Check the name matches. VIES returns the registered name for comparison
3. Check on the day of supply. Registrations get cancelled, and validity is not permanent

That last point is the one that costs money. If a customer's VAT number was cancelled and you zero-rated a supply on the strength of a check from six months ago, the liability lands on you.

When the number does not validate

Four causes, in order:

1. You have the registry code. Eight digits, wrong number entirely
2. The company is not VAT registered. Most small Estonian companies are not
3. Registration was cancelled, which the Tax and Customs Board does for inactive registrations
4. A digit is wrong. Nine digits with no visible check character

Getting the threshold and the filing rhythm right from the start is part of what makes an Estonian company cheap or expensive to run, which is worth seeing set out with the other annual obligations.

The summary