Chile · RUT
Chile RUT Checker
Validar RUT: check the dígito verificador of a Chilean RUT and confirm with the SII that the taxpayer has started activities.
What is a Chilean RUT?
The RUT (Rol Único Tributario) is Chile’s tax identification number, kept by the Servicio de Impuestos Internos (SII). It is a number of up to 8 digits, a hyphen and a check digit from 0 to 9 or K — for example 61.704.000-K for Codelco. For Chilean individuals, the RUT is the same as their national identity number (RUN).
Chilean RUT format
A number, a hyphen and a mod-11 check digit (0–9 or K).
(dots optional)
(0–9 or K)
Example: 61.704.000-K (Corporación Nacional del Cobre de Chile — Codelco, as printed in its annual report).
- Number: Between 100,000 and 99 million in the SII’s e-invoice rules, usually printed with dots: XX.XXX.XXX-X. This checker accepts 7- and 8-digit numbers.
- Check digit: Mod 11 with weights 2–7; a result of 10 is written K and 11 is written 0. Lowercase k is accepted.
- No prefix: A Chilean RUT has no CL prefix. Uruguay’s 12-digit RUT is a different number.
- Personal RUTs: An individual’s RUT is their RUN — personal data, so this page uses company examples only.
How to check a Chilean RUT
- 1 Find the RUT on the supplier’s factura electrónica or tax documents.
- 2 Enter it above, with or without dots. The checker tests the check digit, then looks the RUT up with the SII.
- 3 A valid result shows the taxpayer’s name (partly masked until you sign up) and its status, for a taxpayer that has started activities. No address is returned.
- 4 Need the background on Chilean tax IDs? Read our Chile tax ID guide.
Frequently Asked Questions
How do I validate a Chilean RUT? (¿Cómo validar un RUT?)
First check the dígito verificador with the mod-11 rule, which catches typos. Then look the RUT up in the SII’s free third-party tax-situation service, which shows the name, activities and whether the taxpayer has started activities. Our checker does both.
How is the RUT check digit calculated?
Multiply the digits before the hyphen from right to left by 2, 3, 4, 5, 6, 7 (repeating) and add the results. Subtract the remainder after dividing by 11 from 11: a result of 11 gives 0 and 10 gives K. For Codelco’s 61.704.000-K the sum is 89, 89 mod 11 = 1, and 11 − 1 = 10, so K.
What does the K in a RUT mean?
K is the check digit when the mod-11 calculation gives 10. The check digit is a single character, so the SII uses the letter K instead of 10.
What is the difference between RUT and RUN?
The RUN (Rol Único Nacional) is the identity number the Registro Civil gives to individuals; the RUT (Rol Único Tributario) is the SII’s tax number. For Chileans and resident foreigners they are the same number. Companies have only a RUT, assigned by the SII.
Why does a real RUT show as not registered?
Our checker only confirms RUTs that have Inicio de Actividades — the SII record that a business activity has started. A RUT that is registered with the SII without it, such as an employee’s, comes back as “no matching record” even though the number exists.
What RUT is used for a foreign customer?
The SII uses generic RUTs: 55.555.555-5 for the receiver on export documents and tourist invoices, and 44.444.446-0 on electronic fee receipts (boletas de honorarios) issued to foreigners without domicile or residence in Chile.
Last reviewed: , against official sources.
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