What is an NTN in Pakistan?

The National Tax Number (NTN) is the FBR's identifier for taxpayers. Companies and associations of persons use a 7-digit NTN, while individual filers now use their 13-digit CNIC as their NTN.

How many digits is a Pakistani NTN?

The legacy company/AOP NTN is 7 digits, sometimes written with a trailing check digit (8 digits total). Individuals use their 13-digit CNIC. This tool accepts all three lengths.

Does this tool verify the NTN with FBR?

No. It validates structure and the check digit locally in your browser. To confirm the taxpayer is active you must use the FBR online verification service, which queries the live IRIS registry.

Why does my 7-digit NTN show as format-only?

Without a trailing check digit there is nothing to verify beyond length and that all characters are digits. Add the 8th check digit to have the FBR modulo checksum verified.

Is my NTN sent anywhere?

No. All validation runs in JavaScript inside your browser. Nothing is transmitted to any server, which makes the tool safe for sensitive tax identifiers.

Pakistan NTN Validator

The Pakistan NTN Validator checks whether a National Tax Number issued by the Federal Board of Revenue (FBR) is structurally valid. It handles the legacy 7-digit company and AOP format, verifies the optional check digit, and recognises the 13-digit CNIC that individual filers now use as their NTN — all without sending your number anywhere.

How it works

The FBR uses two identifier styles. Companies and associations of persons hold a 7-digit NTN, historically written as NNNNNNN-N where the final figure is a check digit. Individual filers no longer receive a separate NTN; their 13-digit CNIC serves as the NTN on IRIS and on sales-tax invoices.

When the optional 8th digit is present, this tool recomputes the check digit. It multiplies the seven core digits by the descending weights [7,6,5,4,3,2,1], sums the products, takes that sum modulo 11, and renders a remainder of 10 as 0. The result must equal the supplied check digit. For the 13-digit CNIC-based NTN, the tool validates length and numeric structure and formats it as NNNNN-NNNNNNN-N.

Example

A 7-digit NTN such as 1234567 returns a “valid format” result because there is no check digit to verify. Supplying 1234567-X (where X is the 8th digit) lets the tool confirm or reject the checksum. A 13-digit value like 3520112345678 is recognised as a CNIC-based NTN and formatted accordingly.

Notes

A valid format or check digit confirms only that the number is internally consistent — it does not prove the taxpayer is registered or active. Always confirm live status through the FBR IRIS portal before relying on an NTN for sales-tax invoicing or filing. Everything in this tool runs locally in your browser.