Social Security vs. SSI
Income Reporting & ACA Marketplace Subsidy Guide for Agents
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Core Differences at a Glance
Social Security (SS) and Supplemental Security Income (SSI) are two entirely separate federal programs administered by the Social Security Administration (SSA) — but they are commonly confused. Understanding the distinction is essential because they are treated differently for MAGI income calculations, Medicaid eligibility, and marketplace subsidy qualification.
SS
Social Security Benefits
SSDI • Retirement • Survivor Benefits
- Based on work history. Client or spouse/parent must have earned enough work credits (typically 40 quarters).
- Funded by payroll taxes (FICA). It is an earned entitlement, not welfare.
- SSDI = disability version. Social Security Retirement = age 62+. Survivor = widows, dependents.
- No asset limit. A client can own a home, car, savings, and still receive SS.
- Amount varies based on earnings history. Average SSDI benefit ~$1,580/mo in 2026.
- Medicare eligibility begins 24 months after SSDI starts (or at 65 for retirement).
- COUNTS as income for MAGI and marketplace subsidy calculations.
SSI
Supplemental Security Income
Needs-based • Disability • Age 65+
- Based on financial need, not work history. Client does not need to have ever worked.
- Funded by general tax revenue, not payroll taxes. It is a welfare program.
- Requires disability (approved) or age 65+, AND limited income AND limited assets.
- Strict asset limit: $2,000 individual / $3,000 couple (federal limit; states may vary).
- Fixed federal benefit rate: up to $967/mo individual in 2026 (federal rate; some states add a supplement).
- Automatically links to Medicaid in most states — SSI approval = Medicaid eligibility.
- Does NOT count as income for MAGI. SSI is excluded from marketplace income calculations.
| Feature | Social Security (SS / SSDI) | SSI |
|---|---|---|
| Basis | Work credits / earnings history | Financial need (income + assets) |
| Work required? | Yes (or via parent/spouse record) | No work history required |
| Asset limit | None | $2,000 individual / $3,000 couple |
| 2026 benefit range | Varies — avg. ~$1,580/mo (SSDI) | Up to $967/mo (federal rate) |
| Health coverage | Medicare (after 24-mo wait for SSDI; at 65 for retirement) | Medicaid (automatic in most states upon SSI approval) |
| Counts for MAGI? | YES — included in MAGI | NO — excluded from MAGI |
| Counts for marketplace subsidy? | YES — counts toward income | NO — not counted |
| Can receive both? | Yes — called "concurrent benefits." SS amount reduces SSI dollar-for-dollar above the SSI disregard. | |
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How Income Is Counted — SS vs. SSI
The marketplace uses Modified Adjusted Gross Income (MAGI) to determine subsidy eligibility. SS and SSI are treated very differently under MAGI rules. Getting this wrong leads to incorrect subsidy amounts and potential tax-time reconciliation problems for clients.
Social Security Benefits — Counted in MAGI
Social Security benefits (retirement, SSDI, survivor) are included in MAGI income at the federal level. However, the taxable portion depends on the client's total income. The IRS "combined income" formula determines how much of SS is taxable — but for marketplace MAGI purposes, the full gross Social Security benefit is included in the income calculation, not just the taxable portion. Always use the gross (before Medicare premium deduction) monthly benefit × 12 when projecting annual MAGI.
SSI — Excluded from MAGI entirely
SSI payments are explicitly excluded from MAGI under ACA rules (26 CFR §1.36B-1). A client who receives only SSI has $0 countable income for marketplace purposes — which means they will fall below 100% FPL and generally will not qualify for marketplace premium tax credits in non-expansion states (coverage gap). In expansion states, SSI receipt typically triggers automatic Medicaid — so they would not need a marketplace plan at all.
| Income Type | Counts for MAGI? | How to Report on Marketplace App |
|---|---|---|
| Social Security retirement | Yes — full gross benefit | Enter gross monthly SS benefit × 12 as annual income |
| SSDI (Social Security Disability) | Yes — full gross benefit | Enter gross monthly SSDI amount × 12 as annual income |
| Survivor benefits (SS) | Yes — full gross benefit | Enter gross monthly survivor benefit × 12 |
| SSI payments | No — excluded from MAGI | Do NOT enter SSI as income on the marketplace application |
| State SSI supplement | No — excluded from MAGI | Do not enter state SSI supplement either |
| SSDI + SSI concurrent | SSDI portion only | Enter only the SSDI amount; exclude the SSI portion |
| VA disability compensation | No — excluded from MAGI | Do not enter VA disability payments |
| Workers' compensation | Yes — counts as income | Enter full workers' comp amount as income |
| Wages, self-employment | Yes — counts as income | Enter net earnings from wages or self-employment |
| Unemployment benefits | Yes — counts as income | Enter full unemployment benefit amount |
Important: Use Gross SS, Not Net
Medicare Part B premiums are often deducted directly from Social Security checks. Your client may tell you their monthly SS check is $1,200 — but if $185 is withheld for Part B, their gross benefit is $1,385. Always ask: "What is your full Social Security benefit before Medicare is deducted?" Use the gross amount for MAGI. The award letter or SSA.gov account shows the gross benefit.
3
MAGI & Marketplace Subsidy Qualification
Marketplace premium tax credits (APTC) require income between 100% and 400% FPL (no upper cap for 2026 under current law). Understanding how SS and SSI fall within that range determines whether a client qualifies, and for how much.
| Client Situation | MAGI Impact | Marketplace Outcome |
|---|---|---|
| SS/SSDI only, income under 100% FPL | SS counted — still below 100% FPL threshold | Coverage gap in non-expansion states. Medicaid in expansion states. |
| SS/SSDI only, income 100–400% FPL | SS counted — falls in subsidy range | Qualifies for APTC on marketplace plan. |
| SS/SSDI + Medicare (under 65, 24-mo wait) | SS counted; Medicare coverage exists | Has Medicare — not eligible for marketplace APTC. Enroll in Medicare only. |
| SS retirement + Medicare (age 65+) | SS counted; Medicare coverage exists | Has Medicare — not APTC eligible. Screen for dual-eligible programs. |
| SSI only (no SS) | SSI excluded — MAGI = $0 | Below 100% FPL for marketplace purposes. In expansion states: auto-Medicaid via SSI. In non-expansion: coverage gap. |
| SSI + wages or other MAGI income | SSI excluded; wages/other income counted | Depends on total MAGI from other sources. If 100%+ FPL from wages, may qualify for APTC. |
| Concurrent SS + SSI | Only SSDI/SS portion counted; SSI excluded | If SSDI alone is 100%+ FPL, APTC eligible — unless also on Medicare (disqualifies APTC). |
| SSDI + Medicare (under 65) | SS counted — but Medicare enrollment disqualifies marketplace APTC | Ineligible for APTC. Screen for Medicaid (Medi-Medi / dual-eligible) or Medicare Savings Programs. |
Key rule: Medicare enrollment = no marketplace APTC
- Any client enrolled in Medicare Part A or Part B is ineligible for marketplace premium tax credits — even if their income would otherwise qualify.
- SSDI recipients automatically receive Medicare after 24 months of SSDI payments. Always ask when SSDI started to determine if Medicare has kicked in.
- If a client is in the 24-month Medicare waiting period and not yet on Medicare, they MAY qualify for marketplace APTC if their SSDI income places them at 100%+ FPL.
4
Medicaid Interaction — SS vs. SSI
SS and SSI lead to very different Medicaid outcomes, which in turn affects whether a client lands on Medicaid, Medicare, a marketplace plan, or has no coverage at all.
SS
Social Security & Medicaid
No automatic link
- SS/SSDI receipt does not automatically qualify a client for Medicaid.
- Medicaid eligibility is determined separately based on income (MAGI or SSI rules), category, and state.
- A client on SSDI under 65 in the 24-month Medicare waiting period may qualify for Medicaid if income is below the state threshold — but only in expansion states or if they fit a traditional category.
- Once Medicare begins (after 24 months), client may become dual-eligible if income is low enough.
- SS retirement at 65+ links to Medicare, not Medicaid — Medicaid is available only via dual-eligible programs (QMB/SLMB) if income is low enough.
SSI
SSI & Medicaid
Automatic link in most states
- In most states (including most of your 23 licensed states), SSI approval automatically triggers Medicaid eligibility — the client does not need to separately apply.
- This is referred to as "SSI-linked Medicaid." States using Section 1634 agreements with SSA use this automatic link.
- In a handful of states (called 209(b) states), SSI approval alone is not sufficient — the state applies its own stricter Medicaid criteria.
- Of your 23 states: Indiana, Minnesota, and Missouri are 209(b) states and do not use the full automatic SSI link. All others use the automatic link.
- SSI + Medicaid often leads to dual eligibility if the client is also 65+ or has Medicare.
209(b) states in your licensed territory
- Indiana: Uses its own Medicaid criteria. SSI alone may not guarantee automatic Medicaid — HIP 2.0 and traditional Medicaid rules apply separately.
- Minnesota: Uses its own criteria but is generally very broad — most SSI recipients still qualify for Medical Assistance.
- For all other licensed states: SSI approval = Medicaid eligibility without a separate application in most cases.
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Real Client Scenarios
Use these examples during calls to quickly identify the correct path for each client type.
SSDI only — in Medicare waiting period
Client profile
Age 44 • Texas resident • SSDI approved 8 months ago • $1,450/mo SSDI • No Medicare yet • No other income
MAGI = $17,400/yr (111% FPL). Medicare not started yet. Qualifies for marketplace APTC. Enroll in marketplace plan now. Note: when Medicare starts at month 25, disenroll from marketplace.
SSDI + Medicare — no Medicaid
Client profile
Age 52 • Florida resident • SSDI for 3 years • $1,600/mo SSDI • Enrolled in Medicare Parts A & B
Enrolled in Medicare — NOT eligible for marketplace APTC. Screen for Medicaid (income at $19,200/yr; FL not expanded — check dual-eligible QMB). Consider Medicare Supplement or Medicare Advantage options.
SSI only — expansion state
Client profile
Age 34 • California resident • SSI approved • $943/mo SSI • No work income • No Medicare
SSI = Medi-Cal automatic link. Client should already have Medi-Cal. Confirm enrollment. Do NOT enroll in marketplace — SSI excluded from MAGI, income = $0 for marketplace purposes.
SSI only — non-expansion state
Client profile
Age 41 • Texas resident • SSI approved • $967/mo SSI • No work income • Disability pending for years, now approved
SSI excludes from MAGI — MAGI = $0. Below 100% FPL for marketplace. TX SSI-linked Medicaid applies (TX uses automatic SSI-Medicaid link). Client qualifies for TX Medicaid now that SSI is approved. Do NOT write a marketplace plan.
Concurrent SS + SSI
Client profile
Age 63 • Virginia resident • Receives $620/mo SSDI + $347/mo SSI (concurrent) • Not yet on Medicare
MAGI = $620 × 12 = $7,440/yr (SSDI only; SSI excluded). Below 100% FPL. VA is expanded — Medicaid eligible based on income under 138% FPL. Confirm Medicaid enrollment. Do not write marketplace plan until checking Medicaid status.
SS retirement — under 400% FPL, no Medicare yet
Client profile
Age 62 • Ohio resident • Early SS retirement $1,100/mo • No Medicare (not yet 65) • No other income
MAGI = $13,200/yr (84% FPL). OH is expanded — income under 138% FPL. Qualifies for Ohio Medicaid. Do NOT write marketplace plan — Medicaid-eligible. Rescreen at 65 when Medicare begins.
SSI only — disability pending (not yet approved)
Client profile
Age 51 • Texas resident • Disability application pending • No current income • No SSI yet
No income to count (SSI not yet approved). MAGI = $0 — below 100% FPL, no APTC available. TX not expanded — coverage gap. If client has a reasonable, good-faith expectation of income reaching 100% FPL (e.g., disability approval + back-pay expected), may project income for marketplace. Document basis carefully. Otherwise, no affordable coverage path until SSI is approved.
SSI + part-time wages
Client profile
Age 38 • North Carolina resident • SSI + works part-time $850/mo wages • No Medicare
SSI excluded from MAGI. MAGI = $850 × 12 = $10,200/yr (65% FPL). NC is expanded — qualifies for NC Medicaid under 138% FPL. Confirm SSI + Medicaid dual enrollment. Note: wages + SSI may affect SSI benefit amount separately — advise client to report wages to SSA.
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Live Call Screening Questions
Use this sequence during ACA and Medicare lead calls to quickly identify which benefit type the client has and route them correctly.
Do you receive Social Security?
If yes: Is it disability (SSDI), retirement, or survivor? How much per month before any deductions? When did payments start? Are you also receiving Medicare?
Do you receive SSI (Supplemental Security Income)?
If yes: SSI is excluded from marketplace income — do not count it. Ask if they also have Medicaid (most SSI recipients do). Ask if they have any wages or other income sources.
Are you currently enrolled in Medicare (Part A or B)?
If yes: STOP — not eligible for marketplace APTC. Route to Medicare lane. Screen for QMB/SLMB/D-SNP if income is low.
Is your disability application still pending, or has it been approved?
Pending = no SSI or SSDI income yet. Approved = confirm monthly amount and start date. Approval date matters for Medicare 24-month clock.
Do you have any other income — wages, self-employment, pension, rental?
Count all non-SSI income toward MAGI. Even small amounts of wages can push a client above 100% FPL and into APTC territory or above 138% FPL for Medicaid.
Do you currently have Medicaid?
If yes and they are not on Medicare: likely Medicaid-only. Do not write marketplace plan. If both Medicare + Medicaid: dual-eligible — screen for D-SNP or dual plans.
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Step-by-Step: Reporting Income on the Marketplace Application
Follow these steps when entering SS or SSI income during a marketplace enrollment on HealthCare.gov or a state-based marketplace.
Step 1 — SS / SSDI
Get the gross benefit amount
Ask the client for their award letter or SSA.gov account. Use the gross monthly benefit — before Medicare Part B or Part D premiums are deducted. Never use the net check amount.
Step 2
Annualize the benefit
Multiply gross monthly SS by 12. Example: $1,450/mo × 12 = $17,400 annual SS income. If a COLA increase is expected mid-year, average the two amounts or use the projected year-end rate.
Step 3
Enter under "Social Security income"
On HealthCare.gov, enter the annual amount in the Social Security income field. Do not include SS income in the wages or self-employment fields.
Step 4
Add other MAGI income sources
Add wages, self-employment, pensions, alimony, rental income, and any other countable income. Total MAGI = SS + all other countable income.
Step 1 — SSI
Confirm SSI is the only income
If the client receives only SSI and no other income, their MAGI = $0. Do not enter SSI anywhere on the marketplace application.
Step 2
Check for other income sources
Ask about wages, SSDI (concurrent), pensions, or any other income. Those amounts count and must be entered. Only the SSI portion is excluded.
Step 3
Do not enter SSI on the application
SSI has no income field on HealthCare.gov because it is excluded from MAGI. Entering it as income would artificially inflate the subsidy calculation and create a reconciliation error.
Step 4
Confirm Medicaid status before proceeding
Most SSI recipients already have or qualify for Medicaid. Verify current Medicaid enrollment before writing any marketplace plan to avoid dual enrollment errors.
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Compliance & Best Practice Reminders
- Always use the gross Social Security benefit for MAGI — not the net after Medicare premium deduction. Ask specifically: "What is your benefit before Medicare is taken out?" The award letter or SSA.gov account shows the gross amount.
- Never enter SSI as income on the marketplace application. SSI is explicitly excluded from MAGI under federal ACA regulations. Entering it inflates MAGI and creates a tax-year reconciliation problem for the client.
- Any client enrolled in Medicare Part A or Part B is ineligible for marketplace APTC — regardless of income. Always confirm Medicare status before starting a marketplace application.
- SSDI clients in the 24-month Medicare waiting period are a window of marketplace opportunity. Once Medicare starts, they must disenroll from the marketplace plan promptly or face premium reconciliation.
- SSI approval triggers automatic Medicaid in most of your 23 licensed states. Always confirm Medicaid status for any SSI client before writing a marketplace plan — Medicaid eligibility disqualifies marketplace APTC.
- For concurrent benefit clients (SSDI + SSI), count only the SSDI portion as MAGI income. Document which benefit amounts are which, using the client's award letters or SSA.gov benefit verification letter.
- A disability application being "pending" does not qualify a client for SSI/SSDI income — do not project SSI or SSDI income that has not yet been approved. You may project other income sources the client expects to earn if there is a reasonable, good-faith basis.
- Advise SSI clients who also have wages to report those wages to the SSA — earned income affects their SSI benefit amount separately from their Medicaid or marketplace eligibility, and failure to report can create SSA overpayment issues.