How long does it take to get an EIN?

The honest answer: anywhere from a few minutes to over a month, depending entirely on how the application is filed and whether anything goes wrong.

Timelines by method

Online (irs.gov EIN Assistant): the number is issued immediately at the end of a successful session. The catch: the tool operates roughly 7 AM–10 PM Eastern on weekdays, sessions time out after 15 minutes of inactivity, and the responsible party must have an SSN or ITIN. One EIN per responsible party per day.

Fax (Form SS-4): the IRS states about four business days when they can fax the EIN back, in practice, one to three weeks is the realistic range. This is the required route when the responsible party has no SSN or ITIN.

Mail: four to five weeks or more. Rarely the right choice when any alternative exists.

What actually causes delays

Most 'slow' EINs are really rejected or errored applications: an entity name that conflicts with IRS records (reference 101 errors), a responsible party who's already applied that day, or mismatched details. Fixing an error and refiling can add days, which is why getting it right the first time matters more than raw speed.

Our service exists for exactly this: a specialist checks the application against the common rejection causes and files within IRS hours, and if the IRS kicks it back anyway, we fix and refile free.