If you determine you need a federal tax ID, be sure to apply for an EIN tax ID well before you need to use it. The time frame to get an EIN varies depending on how you apply. Here are the ways to apply for a FEIN and how long each one takes:Apply for an EIN onlineâIf you fill out the EIN online application, you can get your tax ID number instantly. The IRS recommends applying for an EIN online for the fastest, easiest service.
Apply for an EIN by faxâIf you fax form SS-4 to the IRS, it will send an EIN to your fax number within four business days.
Apply for an EIN by mailâIf you mail form SS-4 to the IRS, it will send an EIN to your mailing address within four weeks.
Apply for an EIN by phoneâIf you call the IRS, you can receive an EIN over the phone right away. Only international applicants may apply this way by calling the toll-free number between 6 a.m. and 11 p.m. Eastern time.