In the Republic of San Marino, Tax Identification Numbers (TINs) are essential for individuals and legal entities to ensure tax compliance, facilitate business operations, and conduct financial transactions. These unique identifiers are used by tax authorities to track and manage taxpayers’ obligations accurately. All information provided in this guide is sourced from official government authorities to ensure accuracy and reliability.
Official TIN Types & Local Names
San Marino employs two primary types of TINs:
- Codice ISS (Codice Istituto Sicurezza Sociale): Also known as the Social Security Number (SSI Number), this identifier is assigned to individuals.
- Codice Operatore Economico (COE): This is the Economic Operator Code assigned to legal entities and businesses.
TIN Format & Structure
- Codice ISS (SSI Number):
- Format: A sequence of digits, typically more than one. Leading zeros may be omitted.
- Codice Operatore Economico (COE):
- Format: A 5-digit numeric code.
Issuing Authority & Registration Process
- Codice ISS (SSI Number):
- Issuing Authority: Istituto per la Sicurezza Sociale (Social Security Institute).
- Registration Process: Individuals are automatically assigned an SSI Number upon registration with the Social Security Institute.
- Codice Operatore Economico (COE):
- Issuing Authority: The relevant tax authority in San Marino.
- Registration Process: Legal entities must apply for a COE through the appropriate tax authority. The application process includes submitting necessary documentation as specified by the tax authority.
TIN Verification & Lookup
Currently, San Marino does not provide an online portal for public TIN verification. For verification purposes, individuals and businesses should directly contact the issuing authorities:
- Social Security Institute: For SSI Number verification.
- Relevant Tax Authority: For COE verification.
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Connection Between TIN & VAT Number
San Marino operates a unique tax system:
- VAT System: San Marino does not have a traditional Value Added Tax (VAT) system. Instead, it employs a single-stage tax known as “monofase,” applied to imports.
- COE Usage: The Codice Operatore Economico (COE) serves as an identifier for businesses in tax matters but does not function as a VAT number.
Businesses engaging in transactions should be aware of this distinction and ensure compliance with San Marino’s tax regulations.
Why Accurate TIN Validation Matters
Ensuring the accuracy of your TIN is critical for both businesses and individuals in San Marino. An incorrect or unverified TIN can lead to serious complications such as:
- Delays in tax processing
- Rejection of tax exemption claims
- Fines and penalties for non-compliance
- Rejection of e-invoicing submissions
- Onboarding unqualified suppliers or customers
- Data quality issues across finance and compliance systems
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