How is an Israeli VAT number validated?

The 9-digit number uses the same check as the ID number: multiply each digit alternately by 1 and 2 from the left, subtract 9 from any product over 9, and the number is valid when the total is divisible by 10.

Is the VAT number the same as the company number?

For an Osek Murshe (registered dealer) and a company (ח.פ.), the VAT registration number is the same 9-digit identifier as the business/company number. It is what appears on Israeli tax invoices (חשבונית מס).

My number has only 8 digits — is that valid?

Possibly. Israeli identifiers are nine digits but leading zeros are often dropped in print. This tool zero-pads any number shorter than nine digits before running the check, so an 8-digit number is treated as a 9-digit number with a leading zero.

Does a valid VAT number mean the business is registered?

No. A valid check digit confirms the number is internally well-formed. It does not confirm the dealer is currently registered for VAT. Use the Israel Tax Authority (Rashut HaMisim) services to confirm status.

Is my VAT number sent anywhere?

No. The entire calculation runs locally in your browser. The number never leaves your device.

Israel VAT Number Validator

An Israeli VAT number — for a registered dealer (Osek Murshe, עוסק מורשה) or a company (ח.פ.) — is the 9-digit business identifier that appears on tax invoices and Israel Tax Authority filings. It carries a final check digit using the same mod-10 (Luhn) rule as the national ID number, so transcription errors are caught instantly. This validator runs that algorithm in your browser.

How it works

The number is validated with the Luhn (mod-10) algorithm across all nine digits, left to right:

Strip non-digits and left-pad to nine digits (leading zeros are routinely dropped in print).
Multiply each digit by a weight that alternates 1, 2, 1, 2, … starting from the leftmost digit.
If any product exceeds 9, subtract 9 (equivalent to summing its two digits).
Add all the adjusted values together.
The number is valid when that total is divisible by 10 (total mod 10 == 0).

Example

For VAT number 000000018, all digits are zero except the last two: 1×2 = 2 and 8×1 = 8, totalling 10. Since 10 mod 10 = 0, the number passes the check.

Notes

A valid check digit confirms the number is well-formed, not that the dealer is currently registered for VAT — use Israel Tax Authority (Rashut HaMisim) services for that. Everything runs locally, so your VAT number never leaves your device.