Argentine CUIT and CUIL generator and validator
Generate valid test CUIT and CUIL numbers (Argentine tax IDs for people and companies) with a correct check digit, and validate any CUIT/CUIL.
Generated numbers are fictitious data for software testing: they have a valid format and check digit, but do not belong to real people, accounts or cards. Do not use them for real transactions.
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How it works
Pick the type (male person 20, female 27, either 23/24, company 30/33/34) and how many you need, and get CUIT/CUIL numbers whose check digit is computed with the AFIP/ARCA modulo 11 algorithm. You can output them with or without hyphens and from a specific DNI.
In the validator, paste any CUIT or CUIL to check whether its check digit is correct and which taxpayer type its prefix indicates. Ideal for testing forms, invoicing systems and onboarding flows for Argentina.
Frequently asked questions
How is the CUIT check digit calculated?
The first 10 digits are multiplied by 5, 4, 3, 2, 7, 6, 5, 4, 3, 2 and summed; the digit is 11 minus the remainder of dividing by 11. If it is 11 the digit is 0; if it is 10 the prefix changes to 23 or 33.
Do the generated numbers belong to someone?
They may match a real one by chance since the format is the same. They are for software testing only.
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