Types of Irrevocable Trusts
A practical map of major structures, the goals they serve, and the questions each one introduces.
Choose a trust by its purpose and operating requirements. An acronym is the beginning of a professional analysis, not the conclusion.
Family access and multigenerational planning
| Structure | Planning purpose | Key question |
|---|---|---|
| SLAT — spousal lifetime access trust | A gift for a spouse and possibly descendants. | What happens to indirect family access after death or divorce? |
| IDGT — intentionally defective grantor trust | Separates income-tax ownership from a planned transfer-tax result. | Are valuation, retained powers, and transaction terms supportable? |
| Dynasty trust | Holds wealth for successive generations. | How do GST allocation, state duration rules, and administration interact? |
| QTIP trust | Provides a qualifying spouse’s income interest with remainder control. | Are the marital-deduction requirements and elections satisfied? |
These structures do not guarantee a particular tax result. Reciprocal spousal arrangements, retained benefits, or poorly documented transactions can undermine the intended design. The family must also consider who will administer the arrangement decades from now.
Retained-interest structures: GRATs and QPRTs
A grantor retained annuity trust (GRAT) provides a retained annuity for a defined term. A qualified personal residence trust (QPRT) addresses a residence with a retained term interest. Both require attention to valuation, the retained period, and mortality risk. Source: IRS — Special types of trusts
Ask how required payments or occupancy will work in practice. For a residence, explore the family’s housing plan after the retained term. For an annuity structure, evaluate whether the assets can support the payment obligation without disrupting the broader plan.
Insurance and beneficiary support
An irrevocable life insurance trust (ILIT) can own life insurance and direct how proceeds are administered. Estate exclusion requires careful treatment of ownership rights and transfers; moving an existing policy can raise a three-year estate-inclusion issue. Premium funding and any withdrawal notices require an ongoing process.
A special needs trust seeks to support a beneficiary while accounting for means-tested benefits. First-party and third-party funding have different consequences. Trust language, available resources, distributions, and applicable program rules can affect eligibility. Source: Social Security Administration — Trusts and SSI
Charitable structures: different orders of benefit
A charitable remainder trust (CRT) pays an eligible noncharitable interest first and leaves a charitable remainder. A CRAT generally uses a fixed annuity; a CRUT generally uses a percentage of annual value. Distributions may carry taxable income. Source: IRS — Charitable remainder trusts
A charitable lead trust (CLT) reverses the sequence: charity receives the lead interest and the remainder can pass to noncharitable beneficiaries. Confirm the deduction and income-tax treatment for the particular design. A charitable objective must be real; these structures are not unrestricted personal accounts.
Compare the whole operating model
- Access: Who can receive distributions, and under what standard?
- Assets: Are contributions liquid, marketable, encumbered, or restricted?
- Time: Is the relevant horizon a term of years, a lifetime, or several generations?
- Administration: Who handles payments, notices, appraisals, and returns?
- Adaptability: What happens after relocation, divorce, disability, or a trustee change?
A family may use more than one trust, but complexity should have a purpose. Request a simple diagram showing the assets, decision makers, cash flows, and ultimate recipients before authorizing implementation.
Two objectives, two different designs
A parent wants to support a child with a disability and transfer a growing business to other descendants. One general-purpose trust may not address both goals. The design team should evaluate benefit-sensitive support separately from business succession and transfer-tax planning.
Prepare for the next conversation
- State the non-tax purpose in one sentence.
- Identify who receives value first and last.
- List the annual tasks and responsible professionals.
- Compare the proposal with a simpler alternative.
Common questions
Is a dynasty trust a separate federal tax category?
The term generally describes a long-term planning objective. The actual income, estate, gift, and GST treatment requires separate analysis.
Is an IDGT defective or invalid?
The nickname refers to intentional grantor income-tax treatment, not an invalid document. Legal validity and transfer-tax effects still require independent analysis.
Which irrevocable trust is best?
There is no universally best structure. The appropriate design depends on the objective, assets, family circumstances, tax position, and ability to administer it.
Sources & further reading
Primary-source references for the legal and tax concepts discussed. California court materials describe California law; they should not be treated as rules for every jurisdiction. Confirm current law and filing-year instructions with your professional team.