Paraguay RUC Validation
Validate Paraguay RUC Number Online
Verify Paraguay RUC (Registro Único del Contribuyente) registration status and entity details against the Dirección Nacional de Ingresos Tributarios (DNIT), formerly the Subsecretaría de Estado de Tributación (SET).
Understanding Paraguay RUC Format
The Registro Único del Contribuyente (RUC) is Paraguay's national taxpayer identifier, issued by the Dirección Nacional de Ingresos Tributarios (DNIT), formerly the Subsecretaría de Estado de Tributación (SET). It consists of a base number (up to 8 numeric digits) followed by a hyphen and a single check digit.
Base Number
Digit
- ✓ Structure: The RUC base number is up to 8 digits long, followed by a hyphen and a single check digit (0–9) calculated using a modulus-11 algorithm. For individuals the base often matches the Cédula de Identidad; legal entities are assigned 8-digit base numbers beginning after 80000000.
- ✓ Issuing Authority: RUCs are assigned by the Dirección Nacional de Ingresos Tributarios (DNIT), Paraguay's tax authority, which absorbed the former Subsecretaría de Estado de Tributación (SET).
- ✓ Mandatory Use: The RUC must appear on all commercial invoices (facturas), tax receipts (comprobantes fiscales), and import/export documentation in Paraguay.
Frequently Asked Questions
What is a Paraguay RUC?
The Registro Único del Contribuyente (RUC) is Paraguay's primary taxpayer registration number, issued by the SET (Subsecretaría de Estado de Tributación). It uniquely identifies both individual taxpayers and legal entities — including companies, associations, and foreign entities operating in Paraguay. The RUC is required for all tax filings, invoicing, and commercial registrations. Sign up at Lookuptax to validate Paraguay RUCs in bulk via API.
Is RUC validation mandatory for invoices in Paraguay?
Yes. Paraguayan tax law requires that every comprobante fiscal (tax receipt or invoice) includes the RUC of both the seller and the buyer. Invalid or unregistered RUCs render invoices non-compliant and may disqualify the buyer from claiming VAT (IVA) credits. Automating RUC validation at invoice creation with the Lookuptax API prevents these issues — sign up free at platform.lookuptax.com.
What data is returned on RUC validation?
A successful Paraguay RUC lookup returns the registered taxpayer name, entity type, SET registration status (active/inactive/suspended), and registered economic activities. This data supports supplier due diligence, vendor onboarding, and accounts-payable reconciliation workflows. Lookuptax surfaces all of this in a single API response — sign up free to get started.
Can I validate Paraguay RUCs via API?
Absolutely. The Lookuptax REST API supports Paraguay RUC validation with a simple JSON request and response. You can embed the call into your ERP, billing platform, or KYC workflow to verify every Paraguayan counterparty in real time. API keys are available immediately after signup — visit platform.lookuptax.com to register for free and access full API documentation.
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