How to File Your KMD (VAT Return) in Estonia

A plain-language guide to the Estonian KMD VAT return — what it is, when it's due, and how to submit it to the e-MTA.

If your business is VAT registered in Estonia, you file a KMD — the käibedeklaratsioon, or VAT return — every month. This guide covers what it is, when it's due, and how to submit it.

What is the KMD

For one calendar month, the KMD reports the VAT your company charged on sales (output VAT) and the VAT it paid on purchases (input VAT). The difference is what you pay to (or reclaim from) the Estonian Tax and Customs Board (EMTA).

Additionally, most VAT-registered businesses file the KMD INF annex, which lists individual invoices above the reporting threshold.

When is the KMD due

The KMD is due on the 20th day of the month following the reporting period. The return for January, for example, is due by 20 February. If the 20th falls on a weekend or public holiday, the deadline moves to the next business day.

Late filing can trigger interest and penalties, so it pays to submit on time — even when the return is zero.

What you need before filing

Every sales invoice you issued during the month, with the VAT amount and rate.
Every purchase invoice you received, so you can reclaim the input VAT.
The correct VAT treatment for each line — standard 24%, a reduced rate, zero-rated, or reverse charge for cross-border transactions.

Getting the treatment right is the part that trips most people up. It's the accountant's job to properly determine the VAT treatment — a decision that rests on Estonian bookkeeping rules and the many factors that feed into the final verdict. For example, reverse-charge purchases from another EU country are reported differently from domestic ones.

How to submit

Sign in to the e-MTA self-service portal with your ID-card, Mobile-ID, or Smart-ID.
Open Taxes → Value added tax → VAT return.
Here you enter the totals for the period per line, or upload them from your accounting software.
Review the calculated amount payable, then confirm and submit.

If your books are already in order, filing takes a few minutes of manual typing. The hard part is keeping the underlying invoice data clean and correctly classified throughout the month.

A note on accuracy

The EMTA cross-checks your KMD against the returns filed by your suppliers and customers. If your numbers don't match theirs, you may get a query. Consistent, correctly-classified invoice data is the best way to avoid that.