The NPWP (Nomor Pokok Wajib Pajak) is the Indonesian taxpayer identification number. The classic form has 15 digits: a taxpayer serial, a tax-office (KPP) code and a branch status, usually written NN.NNN.NNN.N-NNN.NNN.

Why is there no pass or fail check digit?

Indonesia does not publish a checksum algorithm for the NPWP, so a tool can only verify the length and structure (category, office code and branch). This validator does exactly that and never claims a number is genuine.

How is the 15-digit NPWP structured?

The classic NPWP is 15 digits split as NN.NNN.NNN.N-NNN.NNN — the first two digits are the taxpayer category, the next six are a serial, the ninth is a check-style digit, the next three are the tax office (KPP) code, and the final three indicate branch status (000 for the head office).

What is the newer 16-digit NPWP?

Since 2024 individual taxpayers in Indonesia use a 16-digit NPWP aligned with their 16-digit NIK (national ID). The validator recognises this form as well as the traditional 15-digit business number.

Does this validator confirm the taxpayer is registered?

No. It only checks length and structure (category, office code, branch). Indonesia does not publish a public NPWP checksum or register that a browser tool can query, so it never claims a number is genuine.

Can I enter the NPWP with dots and dashes?

Yes. The familiar NN.NNN.NNN.N-NNN.NNN punctuation is stripped before validation, so you can paste the formatted number straight from a document.

Is my NPWP uploaded anywhere?

No. Everything runs in your browser using client-side JavaScript — nothing is uploaded or stored.

Indonesia NPWP Validator

Indonesian NPWP validator

Check the structure of an Indonesian NPWP (Nomor Pokok Wajib Pajak — the taxpayer identification number). This helps businesses and developers catch malformed numbers in invoices, tax forms and onboarding flows before they cause problems downstream.

How it works

The tool strips any dots and dashes, then validates the digit count and breaks the number into its components. The classic 15-digit NPWP is written NN.NNN.NNN.N-NNN.NNN:

Segment	Digits	Meaning
Category	2	Taxpayer type (individual, company, government, etc.)
Serial	6	Sequential registration number
Check	1	Structural digit
KPP code	3	Tax office (Kantor Pelayanan Pajak)
Branch	3	000 = head office, otherwise a branch

It also recognises the newer 16-digit NIK-aligned form used for individuals since 2024.

Example

The number 01.234.567.8-901.000 strips to 012345678901000: category 01, serial 234567, check 8, KPP 901, branch 000 (head office) — a clean, well-formed 15-digit structure.

Because Indonesia does not publish a checksum for the NPWP, this is a structure and length validator only — it never claims the number is genuine and never checks it against any register. Everything runs in your browser, so the number you type is never uploaded.