Frequently Asked Questions

Our mission is to simplify the process of validating international tax ID numbers (or TINs). We carefully research tax ID structure and syntax, and design algorithms that strictly apply those rules.

What countries are supported?

We support individual, entity, and VAT tax IDs for over 100 countries. For a complete list, please see our supported countries page.

Is this a TIN lookup service?

We do not provide a TIN lookup service. However, if you do use a separate TIN lookup service, Tax ID Pro is a great way to screen tax ID numbers before submitting them elsewhere. TIN lookups can be expensive, slow, and they may charge per lookup. Tax ID Pro can help by catching invalid TINs before you submit them elsewhere.

Why should I validate a tax ID number?

If you collect tax information in the course of your business, you should take steps to ensure that the information collected is accurate and complete. Strong validation can help to catch errors and fraud before it becomes a headache down the road.