Paraguay Tax ID Number (TIN) Guide 

In Paraguay, the Tax Identification Number (TIN) plays a crucial role for individuals, businesses, and entities to comply with tax regulations. It is required for all tax-related activities, including filing taxes, registering for VAT, and performing other financial transactions. Ensuring that you have the correct TIN is vital to avoid penalties, delays, and complications in dealings with the Paraguayan tax authorities. 

This guide offers a detailed breakdown of the Tax Identification Number (TIN) system in Paraguay, including the formats, registration process, and how to verify TINs. All information presented here is sourced directly from official Paraguayan tax authority websites and trusted government sources. 

1. Tax Identification Number Types 

In Paraguay, the primary tax identification number used is called the RUC (Registro Único de Contribuyentes). 

Types of TIN in Paraguay: 

• RUC (Registro Único de Contribuyentes): This is the official TIN for all taxpayers in Paraguay, including individuals, businesses, and legal entities. It is issued by the Subsecretaría de Estado de Tributación (SET), Paraguay’s tax authority. 

Applicability: 

• Individuals: Panamanian citizens, residents, and foreign nationals conducting business or earning taxable income. 

• Businesses: Corporations, partnerships, sole proprietorships, and other business entities. 

• Legal Entities: Non-profit organizations, foundations, associations, and any other legal entities. 

2. TIN Format and Structure 

The RUC in Paraguay has a specific format that helps distinguish between individuals, businesses, and legal entities. 

Format of RUC: 

• For Individuals: The RUC for individuals consists of 8 digits. The format typically follows the pattern: 

• First Part (1 digit): A single digit representing the entity type (individual or business). 

• Middle Part (6 digits): A unique identification number assigned to the individual. 

• Last Part (1 digit): A check digit used for validation. 

Example: 1-12345678 

• 1: Indicates an individual taxpayer. 

• 12345678: A unique number for the individual. 

• Check Digit: Typically the last digit is a check digit used to verify the accuracy of the RUC. 

• For Businesses: The RUC for businesses is also 8 digits, with a similar structure: 

• First Part (1 digit): Represents the type of entity (business). 

• Middle Part (6 digits): A unique identification number assigned to the business. 

• Last Part (1 digit): A checksum or validation digit. 

Example: 2-98765432 

• 2: Indicates a business entity. 

• 98765432: A unique business registration number. 

• Check Digit: A digit used for internal validation. 

3. Issuing Authority and Registration Process 

The Subsecretaría de Estado de Tributación (SET) is the official tax authority responsible for issuing RUC numbers in Paraguay. 

Issuing Body: 

• Subsecretaría de Estado de Tributación (SET) 

• Official Website: SET – Subsecretaría de Estado de Tributación 

3.1 Registration Process for Individuals: 

1. Eligibility: Paraguayan citizens, residents, and foreigners conducting taxable activities must apply for a RUC. 

2. Required Documents: 

• For Paraguayan Citizens: National identification card (Cédula), proof of address (e.g., utility bill), and any other required documents. 

• For Foreigners: A valid passport, legal residency status in Paraguay, and proof of address in Paraguay. 

3. Application Process: 

• Online: Applications can be submitted online via the official SET website. The online portal guides applicants through the process, requiring them to upload the necessary documents for verification. 

• In-person: Applicants can also apply at a local SET office, where they must submit their documents and complete the registration form. 

4. Fees: There are no fees for individuals to register for a RUC. 

3.2 Registration Process for Businesses: 

1. Eligibility: All businesses, including corporations, sole proprietorships, and partnerships, must register for a RUC. 

2. Required Documents: 

• For Businesses: Legal registration documents such as Articles of Incorporation, proof of business address, and identification documents of business owners. 

3. Application Process: 

• Online: Businesses can apply online through the SET portal. The application process involves providing business registration details and submitting required documents. 

• In-person: Businesses can apply in person at SET offices. Once the application is submitted, SET verifies the details and issues the RUC. 

4. Fees: There are no fees for businesses registering for a RUC. 

4. TIN Verification and Lookup 

The SET provides an official online tool for individuals and businesses to verify the authenticity of their RUC. 

• SET Verification Portal: SET RUC Verification 

Through this tool, taxpayers can enter their RUC number to verify whether it is valid and registered with the SET. Or Instantly Verify Tax IDs in Paraguay with TaxDo Real-Time TIN Validation Platform 

TaxDo offers a compliant, automated, and globally trusted solution for TIN verification—not just in Paraguay, but across 135+ jurisdictions. Unlike other solutions, TaxDo validates tax IDs instantly and securely using only official government sources. 

What Makes TaxDo Different? 

• Real-time TIN verification for Paraguay and 135+ countries  

• Seamless API integration into your ERP, CRM, or onboarding system 

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• Fully compliant and official-source-based results ONLY 

Whether you’re conducting due diligence, onboarding clients, granting tax exemption, or managing vendor compliance in Paraguay, TaxDo helps you avoid risks, delays, and penalties with effortless global Tax ID validation. 

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5. TIN and VAT Number Connection 

In Paraguay, the RUC also serves as the VAT number for businesses. This means that the RUC is used as the identifier for VAT purposes. 

• VAT Number Format: The VAT number is identical to the RUC number. Businesses involved in VAT-eligible activities will use their RUC to report and remit VAT to the Paraguayan tax authorities. 

Example: If a business’s RUC is 2-98765432, this number will also serve as its VAT number. 

6.Why Accurate TIN Validation Matters 

Ensuring the accuracy of your TIN is critical for both businesses and individuals in Paraguay. 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 

Using the Paraguay SET RUC Verification or TaxDo real-time global tax ID verification platform ensures accurate Tax ID validation, error reduction, and full compliance with Paraguay tax laws. 

7. Stay Compliant with TaxDo 

While the SET RUC Verification offers a basic PIN checker, TaxDo takes Paraguay TIN validation to the next level with real-time results, periodic revalidation for ongoing compliance, and seamless integration into your systems. 

With TaxDo, you can automate Tax ID validation, monitor changes, and ensure continuous compliance, all from a single, user-friendly dashboard or through API connectivity. 

TaxDo is trusted by leading enterprises, platforms, and compliance teams worldwide. Try it now and eliminate the risks of Tax ID errors in Paraguay and beyond.