The Determination Letter

What the letter does and why it travels everywhere

When the Internal Revenue Service approves an application for tax-exempt status, it sends back a determination letter: a brief formal notice stating the organisation's name, its Employer Identification Number, the subsection of 501(c) under which it qualifies, and whether contributions to it are deductible. That last point matters because the letter is not merely confirmation for the organisation's own files — it is the credential the organisation presents to the outside world.

Grantmakers routinely require a copy before releasing funds. Banks ask for it when opening an account. State charity registration offices often require it alongside initial filings. Donors who want written confirmation of deductibility want to see it. The document does not expire in the way a licence does, but it reflects the facts as of the date it was issued, and a material change to the organisation's structure or purpose can make an old letter misleading.

The application that produces the letter varies by type. A 501(c)(3) organisation uses Form 1023 ↗ (or the streamlined Form 1023-EZ for smaller, simpler organisations). Other 501(c) categories use Form 1024 or 1024-A. The IRS processes these applications through its Tax Exempt and Government Entities division, and processing times are published and updated on the IRS website. Once approved, the letter is issued and the organisation's status is entered into the IRS Tax Exempt Organization Search database, which is the public-facing confirmation anyone can check without contacting the organisation directly.

The determination letter also fixes the organisation's foundation classification — public charity or private foundation — and that classification carries its own set of rules about distributions, self-dealing and excise taxes. Getting that classification wrong at the application stage is not a trivial error; correcting it requires a separate process.

Organisations sometimes lose their letters. Because the IRS treats the letter as a matter of public record, a replacement can be requested, and the underlying status information is always visible in the Tax Exempt Organization Search tool ↗. Revocation — whether voluntary, after a material change the IRS determines is disqualifying, or through automatic revocation for failure to file — changes the organisation's listing in that database to show the revocation. From that moment, the letter an organisation holds may state something the IRS no longer agrees with, which is why counterparties who care check the live database rather than the paper document alone.