Split-interest trusts live in two worlds: part charitable vehicle, part family wealth arrangement. The IRS watches them through Form 5227, an information return that doubles as the check on whether the trust is honoring its charitable commitments and whether private-foundation excise taxes apply.
The filing matrix is the part practitioners get wrong most, so let’s start there.
Who files Form 5227
The instructions cast a wide net: "All CRTs described in section 664 must file Form 5227. All pooled income funds described in section 642(c)(5) and all other trusts such as charitable lead trusts that meet the definition of a split-interest trust under section 4947(a)(2) must file Form 5227," with a narrow exception for trusts created before May 27, 1969, that received no post-1969 deductible transfers.
A split-interest trust, per the Form 1041 instructions, is one that isn’t tax-exempt under section 501(a), has unexpired interests devoted to non-charitable purposes, and received post–May 26, 1969 transfers for which a charitable deduction was allowed.
The 5227 / 1041 matrix
This is the distinction that matters most:
- Charitable remainder trusts (CRATs and CRUTs): Form 5227 only. The Form 1041 instructions say it directly — "A section 664 CRT doesn’t file Form 1041. Instead, a CRT files Form 5227."
- Pooled income funds: BOTH — "Pooled income funds file Form 1041 … Additionally, pooled income funds must file Form 5227."
- Charitable lead trusts: both — CLTs are taxable trusts filing Form 1041, plus Form 5227 as split-interest trusts
- A CRT with unrelated business taxable income also files Form 4720 — UBTI triggers a section 664(c)(2) excise tax treated as a Chapter 42 tax
Deadline, extension, and e-filing
For calendar year 2025, Form 5227 is due April 15, 2026 — the fiduciary income-tax date, not the May 15 rhythm of Form 990 filers. The extension vehicle is Form 8868 (not Form 7004), filed by the original due date for an automatic extension.
Electronic filing is both available and, for larger filers, mandatory: under final regulations T.D. 9972, anyone filing 10 or more returns of any type in the aggregate during the calendar year must file Form 5227 electronically, with hardship waivers possible on a year-by-year basis. Smaller filers may still paper-file.
The public-inspection surprise
Form 5227 is open to public inspection — anyone can request and read it, like a Form 990. The one carve-out is Schedule A, which holds accumulation and distribution detail tied to identified beneficiaries: "Schedule A of Form 5227 isn’t open to public inspection." Fiduciaries drafting explanatory attachments should write with that audience in mind.
Because a CRT is exempt from income tax and files no Form 1041, its beneficiaries still receive Schedule K-1s (Form 1041) reporting their annuity or unitrust distributions under the four-tier character rules — the K-1 machinery survives even where the 1041 itself doesn’t.
Frequently asked questions
Does a charitable remainder trust file Form 1041 or Form 5227?⌄
When is Form 5227 due?⌄
Is Form 5227 really public?⌄
Can Form 5227 be e-filed?⌄
Our charitable lead trust already files Form 1041. Is that enough?⌄
Related guides
More in Estates, Trusts & Form 1041
Official sources
Tax rules, rates and deadlines change — verify current requirements against the IRS sources above before acting. This guide is general information, not tax or legal advice.