10 Essential Questions About TIN in Lithuania

In Lithuania, the Taxpayer Identification Number (TIN) is tied directly to the entity type:

• For Businesses: The TIN is the Company Code (9 digits) assigned upon registration.

• For Individuals: The TIN is the Personal Code (Asmens kodas), which is the 11-digit biometric identifier.

Lithuania utilizes a centralized identification system to manage fiscal and social records:

• Company Code (Registration Number): A 9-digit unique number for all legal entities.

• VAT Number (PVM): The Company Code prefixed with "LT" (e.g., LT123456789). A 12-digit format may apply to specific entities.

• Personal Code (PIN): An 11-digit identifier for citizens and residents.

• IACS Number: A specific identifier for agricultural entities.

• EORI Number: Used for EU customs, typically the LT prefix + Company Code.

Lithuanian identifiers follow strict mathematical patterns designed for the i.MAS (Intelligent Tax Administration System).

• The Company Code Structure: Exactly 9 numeric digits (e.g., 123456789).

• The Personal Code (PIN) Structure: Exactly 11 numeric digits (e.g., 39001010001).

  • 1st digit: Gender and century of birth (1-6).

  • Next 6 digits: Birth date (YYMMDD).

  • Next 3 digits: Serial number.

  • 11th digit: Checksum.

• The VAT Format: "LT" followed by 9 or 12 numeric digits.

Technical Insight: In 2026, the i.SAF system (part of i.MAS) requires the monthly submission of all sales and purchase invoice registers in XML. The Company Code checksum is weighted mod 11, and i.MAS 2026 automatically flags mismatches in monthly i.SAF-T submissions. If an invoice contains a Company Code that fails this validation or shows a data discrepancy, the VMI’s system will trigger an automated audit request, potentially delaying VAT refunds for the entire tax period.

The Center of Registers (Registrų centras) is responsible for issuing Company Codes to legal entities.

The State Tax Inspectorate (Valstybinė mokesčių inspekcija - VMI) manages tax activation and VAT registrations. For individuals, the Migration Department or civil registry issues the Personal Code.

Registration Thresholds & Mandates:

• Mandatory VAT Registration (2026): Annual turnover exceeding €60,000 (increased from €45,000 to support SMEs; applies to both goods and services).

• Foreign Companies: Non-resident businesses with taxable activities in Lithuania must register from their first transaction (zero threshold applies).

• SAF-T (i.SAF-T) 2026: All resident enterprises must be prepared to submit i.SAF-T (accounting transaction reporting) upon request or for specific audit triggers.

• Corporate Tax (2026): The standard Corporate Income Tax (CIT) rate has increased to 17% (up from 16%) to support national infrastructure.

Tax Rates (2026):

• Standard VAT: 21%.

• Corporate Tax: 17% (Standard) / 7% (Preferential for small entities).

Lithuania’s registration process is highly digitized through the Center of Registers portal.

• Step 1: Company Formation: Register the entity online to receive your 9-digit Company Code.

• Step 2: VMI Registration: Apply for tax registration via the My VMI (Mano VMI) portal.

• Step 3: VAT Activation: Submit form FR0388 to receive your "LT" prefixed VAT number.

• Step 4: EORI Application: For international trade, apply for an EORI number through the Lithuanian Customs portal using your Company Code.

In 2026, "Counterparty Due Diligence" is mandatory under Lithuanian tax law to avoid joint liability.

• Official VAT Search: Use the VIES portal or the VMI’s public search.

• Register of Legal Entities: Verify the "Active" status of a company via the Center of Registers search.

• TaxDo Automation: Manual checks are insufficient for the 2026 real-time environment. TaxDo’s GTL service provides real-time API verification against VMI master data to confirm a Company Code is active and authorized for VAT.

With the increase in CIT to 17% and the expansion of SAF-T reporting, the cost of data errors has risen. TaxDo provides the essential automation layer:

• GSV (Global Syntax Validation): Instant structural and checksum checks for the 9-digit Company Code, 11-digit PIN, and IACS numbers.

• GTL (Global Real-Time Tax ID Verify/Lookup): Connects to the VMI and Center of Registers to confirm a Tax ID is "Active," protecting you from audit flags.

TaxDo TIN Validation Coverage in Lithuania

In the Lithuanian market, a verified Company Code is the "Digital Identity" for the i.MAS system.

The VMI’s 2026 enforcement logic is designed for "Electronic Enforcement":

• VAT Credit Disallowance: If you pay a supplier with an invalid VAT ID, the VMI will disallow the 21% VAT deduction during the i.SAF cross-check.

• Automatic Audit Selection: Entities with high rates of data discrepancies in their i.MAS filings are prioritized for on-site audits.

• Fines: Failure to provide correct tax identifiers in SAF-T reports can result in administrative fines of up to €3,000.

• Delayed Refunds: The VMI will suspend all VAT refunds until the data in the i.SAF register matches the counterparty records.