What is the difference between PIS, PASEP, and NIS?

They are the same 11-digit social identifier used in different contexts: PIS for private-sector workers, PASEP for public servants, and NIS/NIT as the broader social-registration number. All share the same modulus-11 check digit, so this validator covers them all.

How is the PIS check digit calculated?

Multiply the first 10 digits by the weights 3,2,9,8,7,6,5,4,3,2, sum the products, take the remainder modulo 11, and subtract it from 11. If the result is 10 or 11 the check digit becomes 0; otherwise it is that value.

Does a valid number mean the worker is registered?

No. A valid check digit only proves the number is internally consistent and free of typos. Confirm an active registration through eSocial, Caixa, or the INSS rather than relying on the checksum alone.

Why is a number with all identical digits rejected?

Strings like 00000000000 satisfy the arithmetic but are never issued as real PIS/PASEP numbers, so the validator rejects them as a guard against placeholder or test values slipping through.

Is my number sent to a server?

No. The entire check runs in your browser with JavaScript. The number you paste never leaves your device, so it is safe to validate employee data offline.

Brazil PIS/PASEP Validator

Validate a Brazilian PIS/PASEP number before you submit it

The PIS/PASEP (also called NIS or NIT) is the 11-digit number that identifies a Brazilian worker for social-security, FGTS, and benefit purposes. A single transposed digit can stall an eSocial event or a benefit payment. This validator runs the official check-digit rule so you can catch errors at the keyboard.

How it works

The number is 11 digits: 10 base digits plus 1 check digit. The validator applies the official modulus-11 algorithm:

Multiply each of the first 10 digits by the weights 3, 2, 9, 8, 7, 6, 5, 4, 3, 2.
Sum the products.
Take the remainder of that sum divided by 11.
Subtract the remainder from 11 to get the expected check digit; if the result is 10 or 11, the check digit is 0.
Compare the expected digit with the 11th digit you entered.

The tool also rejects numbers that are not 11 digits and repdigit values like 11111111111.

Example and notes

For a number formatted as 120.6184.054-3, the base digits are 1206184054 and the validator computes the expected check digit, comparing it with the provided 3. The result panel shows the weighted sum, the modulo-11 remainder, and both the expected and provided digits so you can see exactly why a number passes or fails.

Remember the checksum is a format test only. It tells you the number is well-formed; it does not confirm the person exists or is currently employed. For that, query the official labor systems.