Back to glossary
Tax CL

RUT

Also known as: Rol Único Tributario

Definition

RUT (Rol Único Tributario) is Chile's tax ID for individuals and companies. It ends in a check digit that can be a number or the letter K.

LATAM context

In Chile, the RUT is both a tax ID and an everyday identity document: it's requested to open an account, issue a receipt, or sign up for a service. The check digit is separated by a dash and calculated from the body of the number; when the calculation lands on ten, it's represented by the letter K, which is why a RUT field can't be validated as purely numeric.

Concrete example

A RUT is written as 12.345.678-5, and one whose check digit is ten is written 7.654.321-K.

How it shows up on your bank statement

On Chilean statements, the account holder's RUT appears in the header next to the account number. Inside transactions it shows up on transfers, where the banking system typically displays the recipient's RUT alongside their name.

How does finO$ handle this?

finO$ extracts the account holder's RUT preserving the dash and the K case, which is exactly where validations that assume the field is purely numeric tend to fail.

Related terms

SII

Need to convert bank statements into structured data?

Start freeGo to my dashboard See the API reference

Just one file? Use the free converter to convert your bank statement to Excel.

Frequently asked questions about RUT

Why do some RUTs end in K?

Because the check digit comes from a calculation that can land anywhere from zero to ten, and ten is represented by the letter K so it fits in a single position.

Does a company's RUT look different from a person's?

Not in format: both have a body and a check digit. They're distinguished by numbering range, since business RUTs are assigned in higher brackets than individual ones.