How long do you have have keep a w-9 on file?

Answer 1

You should keep a W-9 form on file for at least four years from the date you receive it. This is because the IRS can audit your records for up to three years after the tax return is filed, and retaining the W-9 helps ensure compliance with information reporting requirements. It's also a good practice to keep the form as long as you have a business relationship with the vendor or contractor.