Tax Declarations in Estonia — VAT Return, TSD and Deadlines

Timely and accurate tax declarations are an integral part of the day-to-day operations of every Estonian business. When documentation is in order and deadlines are observed, the risk of penalties, interest charges or enforcement action drops significantly. In this article, we take a closer look at the two most common forms — the KMD and the TSD — and how the Estonian Tax and Customs Board (EMTA) expects data to be submitted.

What are the KMD and TSD?

The KMD, or VAT return (käibemaksudeklaratsioon), brings together VAT-related information: sales and purchases, taxable transactions, and the VAT payable or refundable. A VAT-registered taxpayer must ensure that accounting and the return match actual events — from invoices through to import and export transactions in accordance with the applicable rules.

The TSD, or income and social tax declaration (tulu- ja sotsiaalmaksu deklaratsioon), is the central declaration for employers: wages paid to employees, withheld income tax, unemployment insurance contributions and the employer's social tax (sotsiaalmaks). The TSD is not merely a matter of filling in forms: it must be consistent with payroll records, contracts and actual payments.

Who must file the KMD and TSD?

The KMD must be filed by entrepreneurs who are VAT-registered taxpayers — meaning they have registered with EMTA as a VAT-liable person or are subject to the obligation by law. If a company is not VAT-registered, the KMD is generally not filed, although other tax declarations (e.g. other income tax reporting obligations) may still apply.

The obligation to file the TSD arises for employers who pay employees a salary or other taxable income from which income tax must be withheld and employer social tax must be declared. The absence of formal payroll does not automatically mean the absence of obligations — it is important to assess the actual employment relationships and payments.

Monthly deadlines: the 10th and the 20th

In practice, two dates recur as the first entries in an entrepreneur's or accountant's calendar.

• The TSD deadline is typically the 10th of the following calendar month (unless otherwise stipulated by law or official guidance). This deadline covers the previous period's payroll and tax data — it is therefore essential that payroll is closed and reviewed by the end of the month.
• The KMD deadline, depending on the end of the VAT period, is often the 20th of the following month (for monthly filing). The exact period and deadline depend on the registration and the chosen reporting period; details should always be verified in the EMTA e-tax environment or official guidance.

If a deadline falls on a public holiday or weekend, the statutory postponement rules apply — this is one of the most common areas where errors occur without professional monitoring.

Some VAT-registered taxpayers may, with EMTA's permission, file the KMD less frequently (e.g. quarterly), but this changes both the reporting period and the deadlines. Before making a choice, it is worth assessing the volume of documents and whether less frequent filing genuinely reduces the workload or simply creates a larger reconciliation workload at the end of the period.

INF declarations

In addition to the KMD and TSD, the Estonian Tax and Customs Board (EMTA) frequently requires the filing of INF forms — information declarations that provide the authority with additional data on certain payments, fringe benefits or other events relevant for tax purposes. The INF does not replace the main tax declaration but supplements it; an inaccurate or incomplete INF may trigger additional enquiries or assessments.

Which INF is needed depends on the nature and amounts of the transactions. Systematic documentation helps here: the same data that go into the general ledger and payroll should also reach the correct declaration.

It is advisable to review at least quarterly, or at minimum once a year, whether any new types of transactions have arisen in the company's operations that may require additional reporting — for instance, certain tax aspects related to specific partners or special arrangements in the payroll system.

Common mistakes with tax declarations

Discrepancies between records and declarations

The most common problem is when the KMD or TSD does not match the general ledger, bank statements and invoices. For example, an incorrect VAT rate, a forgotten sales invoice or the wrong payroll period immediately creates a discrepancy that can grow substantially over the years.

Confusing deadlines

The TSD's 10th and the KMD's 20th apply to different declarations — mixing them up results in late filing. The risk is especially high in months when the company is dealing with many new clients or projects and bookkeeping takes a back seat.

Forgetting the INF or using the wrong form

The INF declaration is often overlooked, particularly in smaller companies without a dedicated accountant. The result may be additional work later or an enquiry from EMTA.

What happens if a tax declaration is filed late?

A late tax declaration may result in interest charges on the tax due as well as additional measures from EMTA, including formal notices and audits. The exact amounts and calculations depend on the specific circumstances and current legislation; it is important to understand that late filing is not just an "administrative detail" but can affect the company's cash flow and credibility.

Repeated errors in the same area (for example, consistent KMD or TSD discrepancies) increase the risk that EMTA considers the company's internal controls to be weak. It is therefore worth investing in a consistent process rather than only in last-minute corrections.

How digital tools simplify filing

Accounting for Estonian companies relies on EMTA's e-tax environment, bank integrations and software that reduce manual data entry. When sales and purchase documents flow into the system immediately, KMD preparation becomes verifiable and TSD data can be transferred directly from payroll. This does not mean human oversight is unnecessary — only that the accountant can focus on analysis rather than repetitive manual work.

Digital tools also help catch errors early: duplicate invoices, missing purchase documents or payments not allocated to a payroll line emerge more quickly in reports than when calculating in Excel alone. It is worth keeping track of EMTA e-environment updates and form changes — the old habit of "same form as last month" may produce unexpected results after a change.

A good practice is a monthly checklist: general ledger closed, salaries confirmed, KMD and TSD reconciled with bank statements, INF requirement checked — only then press the submit button.

How does GPCONSULT OÜ help with this?

Raamatupidamine Eestis (GPCONSULT OÜ) manages the preparation and timely filing of tax declarations for its clients: KMD, TSD and, where needed, INF and other EMTA requirements. Our work is based on a clear process — document collection, review, declaration preparation and deadline tracking — so that you can focus on your business.

If you want the assurance that your KMD, TSD and INF filings (and related records) are in line with EMTA's expectations, get in touch. Together we will find a suitable solution for your company.