Want the full ACA subsidy mechanics, the 2026 cliff change, MAGI computation, and the Form 8962 reconciliation flow? Read the companion guide.
Read the Premium Tax Credit Guide →
Short Answer
The 2026 premium tax credit equals the second-lowest-cost silver plan benchmark in your area minus your required contribution, where the required contribution is your household income times the applicable percentage from Rev. Proc. 2025-25. Eligibility runs from 100 percent to 400 percent of the federal poverty level - the 400 percent cliff returned January 1, 2026 after the IRA enhanced subsidies expired. For 48-state households, the cliff sits at 62,600 dollars (single) or 128,600 dollars (family of four) using the 2025 HHS poverty guidelines that apply to 2026 plan-year coverage. The 2026 applicable percentage starts at 2.10 percent below 133 percent FPL and rises to 9.96 percent flat from 300 to 400 percent FPL. The credit is capped at your actual plan premium and reconciled on Form 8962 with your annual tax return.
Key Takeaways
- Statutory authority: IRC §36B. Annual computation: Form 8962. APTC reconciliation: Schedule 2 line 2 if repayment owed.
- 2026 PTC formula: PTC = max(0, SLCSP − (household MAGI × applicable percentage)), capped at actual plan premium.
- 2026 applicable percentage table (Rev. Proc. 2025-25): 2.10% below 133% FPL, 3.14% to 4.19% across 133-150%, 4.19% to 6.60% across 150-200%, 6.60% to 8.44% across 200-250%, 8.44% to 9.96% across 250-300%, 9.96% flat from 300-400%, zero above 400%.
- 2026 plan-year coverage uses the 2025 HHS poverty guidelines per §36B(d)(3)(B). Single 100% FPL = 15,650; family of 4 = 32,150 (48 states + DC).
- 400% FPL cliff numbers: single 62,600; family of 2 84,600; family of 3 106,600; family of 4 128,600.
- Native MAGI definition (§36B(d)(2)(B)): AGI + tax-exempt interest + nontaxable SS + foreign earned income excluded.
- MFS filers are barred from PTC outside the §1.36B-2T(b)(2) abuse / abandonment safe harbor.
- Repayment cap when actual MAGI < 400% FPL is on a sliding scale; uncapped when actual MAGI ≥ 400% FPL.
How This Calculator Works
Step 1 - Compute household income as a percentage of FPL
The calculator uses the 2025 HHS poverty guidelines (the lookup year for 2026 plan-year coverage per §36B(d)(3)(B)). For the 48 contiguous states plus DC, 100 percent FPL = 15,650 dollars (single) plus 5,500 dollars per additional household member. Alaska and Hawaii use higher tables. Your household income percentage = household MAGI divided by your household-size 100 percent FPL, expressed as a percentage.
Step 2 - Look up the applicable percentage
For 2026, the calculator uses Rev. Proc. 2025-25 Table 2: 2.10 percent below 133 percent FPL, 3.14 to 4.19 percent across 133-150 percent FPL with linear interpolation, 4.19 to 6.60 percent across 150-200 percent FPL, 6.60 to 8.44 percent across 200-250 percent FPL, 8.44 to 9.96 percent across 250-300 percent FPL, and 9.96 percent flat across 300-400 percent FPL. Above 400 percent the applicable percentage is undefined - the cliff applies and PTC = 0.
Step 3 - Compute the required contribution
Required contribution = household MAGI × applicable percentage. This is the household share of the SLCSP benchmark. Conceptually it is the amount you are expected to pay out-of-pocket for the benchmark silver plan before the credit kicks in.
Step 4 - Compute the annual PTC
Annual PTC = max(0, SLCSP - required contribution). Cap the result at the actual plan premium - PTC cannot exceed what you actually pay. Divide by 12 for the monthly advance PTC.
Step 5 - Cliff and eligibility checks
If household MAGI < 100 percent FPL, the household is generally Medicaid-eligible (or in non-expansion states may have no PTC). If household MAGI > 400 percent FPL, the cliff applies for 2026 and PTC = 0. The calculator flags both conditions.
Step 6 - 2025 plan year (toggle)
For the 2025 toggle, the calculator uses the ARPA / IRA enhanced applicable percentage table (0% below 150% FPL, rising to 8.5% from 400%+ with no cliff) and the 2024 HHS poverty guidelines (single 100% = 15,060; +5,380 per add'l member). 2025 plan-year coverage was the last year before the cliff returned.
Worked Example: Sarah at 350% FPL Single in 2026
Sarah is a single 42-year-old freelance graphic designer living in Ohio. She projects 54,775 dollars of household MAGI for 2026 and shops on healthcare.gov in November 2025 for 2026 coverage. The Marketplace tax tool returns an annual SLCSP of 9,600 dollars for her ZIP code. She picks a silver plan with an annual premium of 8,400 dollars.
Inputs
Plan year2026
Filing statusSingle
Region48 states + DC
Household size1
Household MAGI$54,775
Annual SLCSP$9,600
Annual plan premium$8,400
FPL Computation (2025 HHS, 48 states)
100% FPL household size 1$15,650
Household MAGI / 100% FPL$54,775 / $15,650
= Income as % of FPL350%
Applicable Percentage (Rev. Proc. 2025-25, 2026)
Income band300% to 400%
Applicable percentage9.96% (flat)
Required contribution$54,775 × 9.96% = $5,455
Annual + Monthly PTC
SLCSP - required contribution$9,600 − $5,455
= Pre-cap PTC$4,145
Cap at actual plan premiummin($4,145, $8,400) = $4,145
Annual PTC$4,145
Monthly APTC$345
Sarah's monthly out-of-pocket($8,400 / 12) - $345 = $355
Cliff distance: Sarah is at 350 percent FPL. The 400 percent cliff for her household sits at 62,600 dollars. She has a 7,825-dollar buffer above her current MAGI before she loses the entire 4,145-dollar annual PTC. Side income or a year-end Roth conversion that pushes her past 62,600 forces full APTC repayment - on a sliding scale up to the cliff and uncapped above it.
2025 comparison: Under the IRA enhanced rules in effect for 2025 plan year, Sarah at 350 percent FPL would have paid 6 to 8.5 percent (linear), so roughly 7.25 percent of MAGI = 3,971 dollars required contribution, generating a PTC of 5,629 dollars - meaningfully larger than the 2026 PTC of 4,145 dollars. The cliff also did not exist in 2025, so income above 400 percent still produced PTC at the 8.5 percent cap. The 2026 reset takes both effects away simultaneously.
Quick Facts: 2026 ACA PTC Numbers
2025 HHS Poverty Guidelines (used for 2026 plan-year PTC) - 48 contiguous states + DC
| Household Size |
100% FPL |
250% FPL |
400% FPL (cliff) |
| 1 | $15,650 | $39,125 | $62,600 |
| 2 | $21,150 | $52,875 | $84,600 |
| 3 | $26,650 | $66,625 | $106,600 |
| 4 | $32,150 | $80,375 | $128,600 |
| 5 | $37,650 | $94,125 | $150,600 |
| 6 | $43,150 | $107,875 | $172,600 |
| Each add'l | +$5,500 | +$13,750 | +$22,000 |
2026 Applicable Percentage Table (Rev. Proc. 2025-25)
| Household Income (% FPL) |
Applicable Percentage |
Notes |
| Less than 133% | 2.10% | Floor band; CSR-eligible silver plans available 100-150% FPL |
| 133% - 150% | 3.14% to 4.19% | Linear interpolation |
| 150% - 200% | 4.19% to 6.60% | Linear interpolation |
| 200% - 250% | 6.60% to 8.44% | Linear interpolation |
| 250% - 300% | 8.44% to 9.96% | Linear interpolation |
| 300% - 400% | 9.96% (flat) | Top band; cliff at 400.01% |
| Above 400% | N/A - no PTC | 2026 cliff (returned 2026-01-01) |
Practitioner Insight
The most expensive PTC mistake in 2026 is treating the 400 percent FPL cliff as a 2025-equivalent gentle slope. Under ARPA / IRA, a household that under-projected its income by 5,000 dollars and ended the year at 410 percent FPL still received PTC at 8.5 percent of MAGI - the cliff was off. In 2026 the same miss produces full APTC repayment, often 6,000 to 12,000 dollars on a single return, because the cliff is back. The fix is to update Marketplace projections in real time when income changes - bonus, RSU vest, side gig spike, taxable retirement withdrawal, capital gain, or Roth conversion. For households running close to the 400 percent line, a year-end traditional IRA / 401(k) contribution or HSA contribution can drop MAGI back under the cliff and rescue the entire year's APTC. Practitioners should run a December cliff check for any client receiving APTC. The math is that asymmetric: a 100-dollar deductible contribution that pulls MAGI below the cliff can rescue 8,000 dollars of subsidy. Document the projected income on the Marketplace application and reconcile against W-2s, 1099s, and Schedule C estimates monthly. The cliff treats year-end income as binary, but the planning window is the whole year.
Real-World Scenario: The Cliff Trap on a $3,500 RSU Vest
Marcus is a single 38-year-old contract software developer with two small W-2 contracts and one Schedule C consulting practice. Open enrollment 2026 - he projects 60,000 dollars MAGI, falls cleanly in the 350-380 percent FPL band, picks a silver plan with annual premium 9,000 dollars, accepts a 4,000 dollar APTC at 333 dollars per month, pays 417 dollars per month himself. Cash flow is fine.
Mid-year shift: In June 2026 a previously dormant RSU vest from a prior employer hits Marcus's brokerage statement - 3,500 dollars of taxable W-2 wages reported on a corrected W-2c at year end. He does not update his Marketplace projection because the RSU was unexpected and small. His final 2026 MAGI lands at 63,500 dollars - 406 percent FPL - past the 62,600 dollar cliff for a single household.
Result on Form 8962 in March 2027: Final PTC at 406 percent FPL is zero (cliff). Advance PTC received during the year = 4,000 dollars (12 months × 333 dollars). Excess APTC owed = 4,000 dollars. Because final MAGI is at 400 percent FPL or above, the repayment is uncapped under §36B(f)(2)(B). Marcus owes 4,000 dollars on Schedule 2 line 2 of his 2026 Form 1040 - the entire APTC he received during the year, on top of his ordinary federal tax.
The rescue that did not happen: A 4,000-dollar traditional IRA contribution in February 2027 (deductible against 2026, deadline April 15, 2027) would have dropped MAGI to 59,500 - back inside 380 percent FPL - and rescued the full 4,000-dollar APTC plus delivered ordinary deduction value. Marcus did not make the contribution because no one ran the cliff check before he filed. Practitioners should screen every APTC client between 380 and 410 percent FPL for an above-the-line MAGI drop opportunity before filing the 2026 return.
When This Calculator Does Not Cover Your Situation
- Cost-sharing reductions (CSRs): CSRs reduce silver-plan deductibles, copays, and out-of-pocket maximums for households 100 to 250 percent FPL who enroll in a silver plan. CSRs are separate from PTC and not modeled here. The Marketplace plan-shopping tool shows the CSR-adjusted plan structure automatically.
- State-based exchanges with state subsidies: California, New Jersey, New York, Massachusetts, Vermont, and Washington layer state-funded subsidies on top of federal PTC. Covered California's state subsidy can extend coverage above 400 percent FPL even after the federal cliff returned. The calculator computes only the federal PTC.
- Affordable employer-sponsored coverage: If your employer offers minimum-essential, affordable coverage (employee-only premium ≤ 9.96% of household income for 2026 per Rev. Proc. 2025-25), you are PTC-ineligible regardless of income. The "family glitch" was reformed by Treas. Reg. §1.36B-2(c)(3)(v)(C) effective 2023 to test affordability separately for the employee and dependents.
- Below 100% FPL households: In Medicaid-expansion states, the household is Medicaid-eligible. In non-expansion states, the household may fall in the coverage gap with neither Medicaid nor PTC. The calculator returns zero PTC below 100% FPL but does not direct to Medicaid.
- Native American households: Members of federally recognized tribes have special PTC and CSR rules including monthly enrollment, no cost-sharing on AI/AN-eligible plans, and exemptions from the individual mandate where applicable. Use the IHS / IRS Form 8965 guidance, not this tool.
- Mid-year coverage changes: Marketplace coverage that starts or ends mid-year requires a month-by-month PTC computation on Form 8962 Part II Column (a) instead of the annual computation. The calculator returns an annual figure; for partial-year coverage, divide proportionally and confirm against your monthly Form 1095-A entries.
- Self-employed health insurance deduction interaction: Self-employed taxpayers can deduct unsubsidized health insurance premiums above-the-line under IRC §162(l). The deduction amount is reduced by the PTC. Solving the circular interaction (deduction reduces AGI which reduces MAGI which changes PTC which changes the deduction) requires the iterative method in IRS Pub 974 - not modeled here.
FAQ: Premium Tax Credit and ACA Subsidies
What is the premium tax credit?
The premium tax credit (PTC) is a refundable federal tax credit under IRC section 36B that offsets the cost of health insurance purchased through an ACA Marketplace exchange. It can be paid in advance directly to the insurer (advance PTC, or APTC) to reduce monthly premiums, or claimed as a refund when you file Form 8962 with your Form 1040. The PTC equals the second-lowest-cost silver plan (SLCSP) benchmark in your area minus your required contribution, where the required contribution is your household income times the applicable percentage from the IRS table.
What changed for the premium tax credit in 2026?
The American Rescue Plan Act enhanced PTC provisions, extended by the Inflation Reduction Act, expired December 31, 2025. Beginning with 2026 plan-year coverage the rules revert to the original ACA structure: the 400 percent of federal poverty level eligibility cliff is reinstated, households above 400 percent FPL receive zero PTC, and the applicable percentage table per Rev. Proc. 2025-25 is higher across every income band. KFF analysis estimates average premium payments for subsidized enrollees roughly doubled in 2026 compared to 2025 for the same plan because of these changes.
What is the 400 percent FPL cliff?
The 400 percent federal poverty level cliff is the income ceiling above which a household receives zero premium tax credit. For 2026 plan-year coverage in the 48 contiguous states and DC the cliff sits at $62,600 for a single filer (4 times the 2025 100 percent FPL of $15,650) and $128,600 for a family of four (4 times $32,150). Earning even one dollar above the cliff eliminates the entire subsidy. The cliff was suspended for plan years 2021 through 2025 by ARPA and IRA. It returned January 1, 2026.
What is the SLCSP benchmark and where do I find it?
The second-lowest-cost silver plan (SLCSP) is the benchmark used to compute your premium tax credit under IRC section 36B(b)(2)(A). It is the second-cheapest silver-tier plan available to your tax family in your rating area. You do not have to enroll in this plan; it is just the formula reference. You can look up your SLCSP through the healthcare.gov tax tool at healthcare.gov/tax-tool, or for prior years on Form 1095-A Part III column B from your insurance Marketplace. State-based exchanges (CA, NY, MA, etc.) use the same statutory definition through their own websites.
What income counts for the premium tax credit?
PTC eligibility uses modified adjusted gross income (MAGI) as defined in IRC section 36B(d)(2)(B). MAGI equals Adjusted Gross Income (Form 1040 line 11) plus tax-exempt interest, plus the nontaxable portion of Social Security benefits, plus any foreign earned income excluded under section 911. Household MAGI is the sum of the taxpayer, spouse (if MFJ), and any dependents required to file. PTC uses household MAGI rather than household income for any other purpose, so estimating MAGI accurately is the most important input to the calculator.
Why does my Marketplace coverage for 2026 use 2025 federal poverty guidelines?
The 2025 HHS poverty guidelines are the most recently published guidelines as of the open enrollment period for 2026 plan-year coverage (November 2025 through January 2026). Section 36B(d)(3)(B) defines the federal poverty line as the most recently published poverty guidelines as of the first day of the regular enrollment period for plan-year coverage. So 2026 plan-year PTC is computed using the 2025 HHS poverty guidelines. The 2026 HHS poverty guidelines (published January 2026) are used for Medicaid and CHIP eligibility but not for 2026 plan-year PTC.
What is the 2026 applicable percentage table?
Per Rev. Proc. 2025-25, the 2026 applicable percentage table for IRC section 36B(b)(3)(A)(i) is: less than 133 percent FPL = 2.10 percent. 133 to 150 percent FPL = 3.14 percent rising linearly to 4.19 percent. 150 to 200 percent FPL = 4.19 percent rising to 6.60 percent. 200 to 250 percent FPL = 6.60 percent to 8.44 percent. 250 to 300 percent FPL = 8.44 percent to 9.96 percent. 300 to 400 percent FPL = 9.96 percent flat. Above 400 percent FPL = no PTC (cliff). The percentage is your household required contribution rate; multiply by household income to get your annual share of the benchmark plan.
How does advance PTC reconciliation work on Form 8962?
If you received advance PTC during the year, you reconcile on Form 8962 with your annual Form 1040. The actual 2026 PTC is computed using your final household MAGI and family size. If actual PTC exceeds advance PTC, the difference is a refundable credit added to your refund. If advance PTC exceeded actual PTC (you under-estimated income), you repay the excess on Schedule 2 line 2. The repayment is capped on a sliding scale for households below 400 percent FPL but uncapped above 400 percent FPL (the cliff). Failing to file Form 8962 when you received advance PTC will block future advance PTC and may stall your refund.
Can married filing separately taxpayers claim the premium tax credit?
Generally no. IRC section 36B(c)(1)(C) bars MFS filers from the PTC unless they meet a domestic-abuse or abandonment safe harbor under Treas. Reg. section 1.36B-2T(b)(2). The safe harbor requires the filer to be living apart from the spouse, unable to file jointly because of abuse or abandonment, and to attest to those facts on the return. Outside the safe harbor, married couples must file MFJ to claim PTC. The IRS will deny the credit and recapture any APTC if the household files MFS without qualifying for the safe harbor.
What if my actual income comes in higher than my estimate?
You repay the excess advance PTC on Form 8962. For households with final MAGI under 400 percent FPL, the repayment is capped on a sliding scale from $375 to $1,575 per single filer (2026 estimated, doubled for MFJ). For households at or above 400 percent FPL, repayment is uncapped - you owe back every dollar of APTC received. This is the practical bite of the 2026 cliff: a household enrolled in advance PTC at projected 380 percent FPL who ends the year at 410 percent FPL repays the entire annual PTC (often $8,000 to $15,000) on the next return. Update Marketplace projections at any income change during the year to avoid this trap.
Decision Step: How Should You Approach 2026 Marketplace Coverage?
Route A - You Are Confidently Below 400% FPL
Run the calculator with your projected MAGI. Take the APTC and pay your monthly net premium. File Form 8962 with your 2026 return to reconcile. If your income comes in lower than projected, you receive additional PTC as a refundable credit. If higher, the repayment is sliding-scale capped under 400% FPL. Read the Premium Tax Credit Guide for the MAGI definition and the Form 8962 reconciliation flow.
Route B - You Are Hovering 380-410% FPL
This is the danger zone. The 2026 cliff at 400% FPL means a small income surprise eliminates the entire annual PTC and triggers full uncapped APTC repayment. Strategies to consider before year-end: traditional IRA / 401(k) catch-up contribution, HSA contribution if HDHP-covered, deferred Roth conversion to next year, deferred bonus to next year, deductible business expense acceleration. Each dollar you keep MAGI under the cliff can rescue several thousand dollars of APTC. The HSA Contribution Calculator and Roth Conversion Calculator help size the moves.
Route C - You Are Above 400% FPL With No Realistic Way Down
Federal PTC = 0 in 2026. Two options: shop off-Marketplace for unsubsidized coverage (often slightly cheaper than Marketplace plans of the same metal tier), or check your state-based exchange for state-funded subsidies that extend above 400% FPL (CA, NJ, NY, MA, VT, WA). Self-employed taxpayers can deduct the full unsubsidized premium above-the-line under IRC §162(l) if they have net SE income. The Self-Employment Tax Calculator helps quantify the deduction impact.
This calculator is for educational and illustrative purposes only. It does not constitute tax, legal, or financial advice. Premium tax credit eligibility involves Marketplace enrollment, household composition, employer-sponsored coverage offers, immigration status, and state-specific rules that this tool does not fully model. Cost-sharing reductions, state-funded subsidies, the self-employed health insurance deduction interaction, and Native American household rules are outside scope. Consult a qualified tax professional and verify your SLCSP and final MAGI against your Form 1095-A before filing Form 8962. Tax laws are subject to change.