Special Needs Trust Calculator: First-Party vs Third-Party vs Pooled
A special needs trust calculator helps you pick between the three SNT types authorized by federal law and estimate what setup will cost. A first-party (self-settled) SNT under 42 U.S.C. §1396p(d)(4)(A) holds the beneficiary's own money (personal injury settlement, back SSDI, inheritance) but requires that the beneficiary be under 65 at establishment and that any remainder at death repay Medicaid.
A third-party SNT (funded by parents or other family) has no age limit and no Medicaid payback — remainder passes to family. A pooled SNT under 42 U.S.C. §1396p(d)(4)(C), run by nonprofits, is the fallback for beneficiaries 65+ funding their own money and for modest funding amounts under about $100,000.
Assets in a properly drafted SNT are not countable resources for SSI or Medicaid under POMS SI 01120.200. Setup ranges from $500-$1,500 (pooled) to $3,000-$5,000 (standalone first-party or third-party).
How it's calculated
The calculator matches the beneficiary's age, the funding source, current benefit status, and funding amount against the three SNT categories. The critical fork: is the money the beneficiary's own or someone else's? If the money is the beneficiary's (personal injury settlement, back SSDI award, direct inheritance), federal law requires either a first-party (d)(4)(A) SNT or a pooled (d)(4)(C) SNT. First-party requires the beneficiary to be under 65 at establishment — after 65, only pooled is available, and in most states 65+ funding of a pooled SNT triggers a Medicaid transfer penalty. Both require Medicaid payback: any remaining trust assets at the beneficiary's death repay state Medicaid for benefits paid, up to the trust balance.
If the money is a family member's, a third-party SNT is the tool. Third-party SNTs have no age limit, no Medicaid payback, and remainder can pass to siblings or other family. Third-party SNTs can be established during the funder's life (inter vivos) or created inside a parent's will (testamentary).
What SNTs can pay for changed materially in 2024. Under 89 FR 21199 effective September 30, 2024, food no longer counts as in-kind support and maintenance (ISM) for SSI. That means SNT distributions for food no longer reduce SSI. Shelter (rent, mortgage, utilities, property taxes) still triggers the Presumed Maximum Value reduction — up to one-third of SSI FBR ($994 × 1/3 = $331) plus $20 general income exclusion, so a shelter distribution reduces SSI by up to $311/month. Cash distributions directly to the beneficiary are unearned income and reduce SSI dollar-for-dollar. Everything else — medical care not covered by Medicaid, therapy, transportation, education, vacations, personal care, electronics, hobbies — is safe.
Cost ranges reflect 2026 national attorney fee surveys and vary materially by state and complexity. Pooled SNT setup is $500-$1,500 (nonprofit administrator handles most drafting). Standalone first-party or third-party SNT setup is $2,500-$5,000. Add professional trustee fees of roughly 1% of assets/year for ongoing administration.
A worked example
Consider a 12-year-old child with autism receiving SSI and Medicaid whose grandparent wants to leave $250,000 for the child's benefit. The recommended trust is a third-party SNT because the grandparent is funding with her own money, not the child's.
There is no age limit and no Medicaid payback — remainder at the child's death passes to whomever the grandparent names (typically siblings). Setup cost: $2,500-$5,000 for a standalone third-party SNT drafted by a special-needs attorney.
The trust can pay for therapy not covered by Medicaid, private-school tuition, adaptive equipment, vacations, and (as of 9/30/2024) food. It cannot pay cash to the beneficiary or pay rent/utilities without triggering the PMV reduction.
If the grandparent instead planned to fund only $50,000, a pooled third-party SNT would be more cost-effective at $500-$1,500 setup.
Common mistakes to avoid
- Using a first-party SNT for a beneficiary over 65. First-party (d)(4)(A) SNTs are only for beneficiaries under 65 at establishment. After 65, only a pooled (d)(4)(C) SNT is available — and in most states, 65+ funding triggers a Medicaid transfer penalty under 42 U.S.C. §1396p(c).
- Funding a third-party SNT with the beneficiary's own money. This makes it a first-party SNT by operation of law, triggering the Medicaid payback and (if over 65) the age problem. Third-party SNTs must be funded exclusively with the funder's own assets — never commingle.
- Distributing cash to the beneficiary. Cash directly to the beneficiary is unearned income and reduces SSI dollar-for-dollar. Pay third parties directly for goods and services — grocery store, pharmacy, landlord — never write a check to the beneficiary.
- Paying rent or utilities from the SNT. Shelter distributions trigger the PMV reduction of up to one-third SSI FBR ($331 in 2026) plus $20 general income exclusion. Total SSI reduction can be ~$311/month. Non-shelter housing costs (repairs, homeowners insurance, HOA fees) are safer than rent/mortgage.
- Self-drafting an SNT. SSI and Medicaid regulators routinely reject self-drafted SNTs, disqualifying the beneficiary from benefits. Every SNT must be drafted by an attorney experienced in special-needs planning — the state Medicaid agency and Social Security review the trust document.
- Forgetting food is no longer ISM. Under 89 FR 21199 effective September 30, 2024, food no longer counts as in-kind support and maintenance. SNTs can now pay for groceries and restaurant meals without reducing SSI — this is still novel and many older SNT operating manuals have not been updated.
Frequently asked questions
What is a special needs trust calculator?
A special needs trust calculator helps identify which of the three federally-authorized SNT types (first-party under 42 U.S.C. §1396p(d)(4)(A), third-party under POMS SI 01120.200, pooled under §1396p(d)(4)(C)) fits your situation based on the beneficiary's age, funding source, current benefits, and funding amount. It estimates typical setup costs ($500-$5,000 depending on type), shows whether Medicaid payback applies, and lists what the trust can and cannot pay for.
First-party vs third-party SNT — what's the difference?
A first-party SNT under 42 U.S.C. §1396p(d)(4)(A) holds the beneficiary's own money (personal injury settlement, back SSDI, direct inheritance). The beneficiary must be under 65 at establishment, and Medicaid payback is required at death. A third-party SNT is funded by someone else (parents, grandparents, siblings) with their own assets — no age limit, no Medicaid payback, remainder passes to family beneficiaries you name. Third-party is the preferred vehicle when family is doing the planning.
What is a pooled special needs trust?
A pooled SNT under 42 U.S.C. §1396p(d)(4)(C) is run by a nonprofit that pools multiple beneficiaries' sub-accounts for investment purposes while keeping each account separate for distribution. Setup ranges $500-$1,500 versus $2,500-$5,000 for standalone trusts. Pooled is common when funding is modest (under $100,000), when the beneficiary is 65+ using their own money (the only option available), or when the family has no natural trustee. In most states, funding a pooled SNT after age 65 triggers a Medicaid transfer penalty.
How much does it cost to set up a special needs trust?
Standalone first-party or third-party SNTs run $2,500-$5,000 in setup fees drafted by an attorney experienced in special-needs planning, with higher fees in high-cost markets (Manhattan, San Francisco, Boston). Pooled SNTs run $500-$1,500 for the joinder agreement plus a nonprofit enrollment fee. Ongoing administration adds a professional trustee fee of roughly 1% of assets per year plus tax preparation ($500-$1,500/year). Self-drafting is not viable — Medicaid and SSA routinely reject self-drafted SNTs.
Does an SNT affect SSI or Medicaid?
No, if properly drafted. Assets in an SNT are not countable resources under POMS SI 01120.200 for SSI or under equivalent state Medicaid rules. Distributions are treated per SSI ISM (in-kind support and maintenance) rules: food distributions no longer count (89 FR 21199, effective 9/30/2024); shelter distributions trigger PMV reduction of up to one-third SSI FBR ($331 in 2026) plus $20 general income exclusion; cash to the beneficiary is unearned income and reduces SSI dollar-for-dollar. Third-party payments for medical care, therapy, transportation, education, vacations, and non-shelter expenses are safe.
What can a special needs trust pay for?
SNTs can pay third parties directly for: medical care not covered by Medicaid, therapy (physical, occupational, speech), transportation and adaptive vehicles, education and tutoring, vacations and entertainment, personal care attendants beyond what Medicaid covers, electronics and internet, pets and hobbies, and (as of 9/30/2024) food. SNTs cannot: give cash to the beneficiary (reduces SSI dollar-for-dollar); pay rent, mortgage, utilities, or property taxes without triggering PMV (up to ~$311/mo SSI reduction). Structure distributions through third-party payment, never through the beneficiary.
Sources
We prioritize primary sources for rules, formulas, rates, limits, and definitions. See our calculator methodology and editorial policy.