What Counts as ACA MAGI (and What Doesn't)
ACA MAGI is not the same as your regular adjusted gross income (AGI), but the difference is narrow. ACA MAGI equals your AGI plus:
- Tax-exempt Social Security benefits
- Tax-exempt interest income
- Excluded foreign earned income
Notably, ACA MAGI does NOT add back:
- Traditional IRA deductions
- Student loan interest deductions
- HSA deductions
- Self-employed health insurance deductions
- Self-employed retirement plan contributions
That last list is your toolkit. Every dollar you put into those categories reduces your ACA MAGI dollar-for-dollar.
2026 ACA Subsidy Income Thresholds by Household Size
The following thresholds are based on 2025 Federal Poverty Guidelines, which govern 2026 coverage.
| Household Size | 100% FPL (Minimum) | 250% FPL (CSR Cutoff) | 400% FPL (Subsidy 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 |
Alaska and Hawaii have higher FPL benchmarks. Cost-sharing reductions (CSRs) apply only to Silver plans for households below 250% FPL and can dramatically lower deductibles and copays on top of the premium credit.
See the full ACA income limits reference at CoveredUSA's ACA income limits page.
Strategy 1: Contribute to a Traditional IRA
Traditional IRA contributions are deducted above the line, which means they reduce your AGI and your ACA MAGI. You do not need to itemize deductions to benefit.
2026 contribution limits:
- Under age 50: $7,500
- Age 50 and older: $8,600 (includes $1,100 catch-up)
The deduction phases out for higher earners who are also covered by a workplace retirement plan. If you are not covered by a workplace plan, the deduction is available at any income level. If your spouse has a workplace plan but you do not, the phase-out range for your deduction starts at a higher income.
A couple earning $90,000 combined with no workplace plan could each contribute $7,500 to a traditional IRA, reducing their ACA MAGI by $15,000 and potentially adding thousands in annual subsidy.
Deadline: Unlike 401(k) contributions, you can make IRA contributions for the prior tax year up to your tax filing deadline (typically April 15). That means you can calculate your income in January, see exactly how far you are from the subsidy cliff, and contribute the precise amount needed.
Strategy 2: Max Out Your HSA
Health Savings Account (HSA) contributions reduce your ACA MAGI dollar-for-dollar. You must be enrolled in an HSA-eligible high-deductible health plan (HDHP) to contribute.
2026 HSA contribution limits:
- Self-only HDHP coverage: $4,400
- Family HDHP coverage: $8,750
- Age 55 or older: add $1,000 catch-up
HSA contributions are triple tax-advantaged: they reduce your taxable income now, grow tax-free, and come out tax-free when used for qualified medical expenses. Unused balances roll over indefinitely. After age 65, you can withdraw funds for any purpose (ordinary income tax applies, similar to a traditional IRA).
For someone earning $65,000 who is single and enrolled in an HDHP, contributing the full $4,400 to an HSA brings their ACA MAGI down to $60,600, clearing the $62,600 subsidy cliff and restoring eligibility.
Strategy 3: Self-Employed Health Insurance Deduction
If you are self-employed and pay for your own health insurance, you can deduct 100% of premiums paid for yourself, your spouse, and your dependents as an above-the-line deduction. This directly reduces your AGI and therefore your ACA MAGI.
This deduction applies to self-employed individuals, sole proprietors, partners, and S-corp shareholders who own more than 2% of the company. You cannot claim the deduction for any month in which you were eligible to participate in an employer-subsidized health plan (including a spouse's employer plan).
For a self-employed person paying $600 per month in premiums, that is $7,200 annually removed from MAGI before any other strategy.
Strategy 4: Self-Employed Retirement Plans
Self-employed individuals have access to retirement accounts with much higher contribution limits than standard IRAs, all of which reduce ACA MAGI.
SEP-IRA: You can contribute up to 25% of net self-employment income, with a 2026 cap of $72,000. A freelancer earning $100,000 in net self-employment income could contribute $25,000 to a SEP-IRA, cutting their ACA MAGI by $25,000.
SIMPLE IRA: Employee contribution limit is $17,000 in 2026 ($21,000 if age 50 or older).
Solo 401(k): Combines employee and employer contributions. Employee deferrals up to $24,500 ($32,500 if 50+), plus employer contributions of up to 25% of compensation. Total cap is $72,000.
These plans let high-earning self-employed people manage their MAGI strategically without sacrificing long-term financial security.
Strategy 5: Deduct Student Loan Interest
Student loan interest is an above-the-line deduction that does NOT get added back into ACA MAGI calculation. You can deduct up to $2,500 in student loan interest per year if your income falls within the phase-out range. For 2026, the deduction begins phasing out at $85,000 for single filers and $175,000 for married filing jointly.
This is a passive MAGI reduction, meaning you get it automatically if you are paying student loans and your income qualifies, with no additional action required.
Strategy 6: Maximize Business Deductions (Self-Employed)
If you are self-employed or own a small business, legitimate business deductions reduce your net self-employment income, which reduces your AGI, which reduces your ACA MAGI. Common deductions include:
- Home office deduction (dedicated workspace)
- Business mileage (72.5 cents per mile in 2026)
- Business equipment, software, and subscriptions
- Professional development and education
- Business insurance premiums
- Health insurance premiums (already covered in Strategy 3)
These are not ACA-specific tactics. They are standard tax deductions. The ACA benefit is a byproduct of correctly reporting business income and expenses.
Strategy 7: Capital Gains Timing
Capital gains count toward ACA MAGI. If you have appreciated assets, you can control when you realize gains. Selling assets across two tax years instead of one year keeps each year's MAGI lower. If you are near the subsidy cliff, deferring a planned asset sale by even a few weeks into the next calendar year can preserve your subsidy for the current plan year.
Conversely, if you have unrealized capital losses, harvesting them in the same year as gains offsets the gains and keeps your MAGI lower.
Strategy 8: Roth Conversions Require Careful Sizing
Roth IRA conversions increase your MAGI because you are moving pre-tax money into a post-tax account. If you are near the subsidy cliff, a large Roth conversion can push you over and eliminate your subsidy.
However, in years when your income is low, a calculated Roth conversion can make sense. The key is to fill the space between your current MAGI and the 400% FPL threshold, not exceed it. For example, if a single person has a MAGI of $40,000, they could convert up to $22,600 from traditional IRA to Roth without hitting the subsidy cliff.
This requires coordination with a tax professional, especially if you are also implementing other MAGI-reduction strategies.
How Much Can You Save With MAGI Reduction?
The value of staying under the subsidy cliff depends on your age, location, and household size. Premiums for older adults are significantly higher than for younger ones, which means the subsidy is larger in dollar terms.
A 60-year-old single person earning $63,000 in 2026 receives zero subsidy. The benchmark Silver plan premium for someone that age can run $1,000 to $1,500 per month in many states. Dropping their MAGI to $62,500 by contributing $500 to a traditional IRA could unlock $10,000 or more in annual premium credits, depending on the plan and state.
For households that are not near the cliff but are within the 400% FPL range, increasing subsidy size by reducing MAGI follows a sliding scale. Fewer dollars of MAGI generally means a higher tax credit percentage.
Combining Strategies: A Planning Example
Consider a married couple, both 55, with no workplace retirement plans, one partner self-employed, with a projected 2026 combined MAGI of $140,000. The 400% FPL subsidy cliff for a household of two is $84,600. They do not qualify for subsidies.
If they use these strategies:
- Self-employed health insurance deduction: $14,400 (premiums for both)
- SEP-IRA contribution: $20,000 (25% of $80,000 net self-employment income)
- Traditional IRA for the non-self-employed spouse: $8,600 (catch-up eligible)
- HSA contribution on an HDHP: $8,750 family
Total MAGI reduction: $51,750
Adjusted MAGI: $88,250
They are still above the $84,600 cliff for a household of two, but by adding a student loan interest deduction of $2,500 and reviewing business deductions, they may be able to close the remaining $3,650 gap.
This is why MAGI planning is a year-round activity, not a one-time filing decision.
When MAGI Is Already Low: Watch the Floor Too
There is a floor as well as a ceiling. If your MAGI falls below 100% FPL (for example, $15,650 for a single person), you do not qualify for marketplace subsidies. In states that have expanded Medicaid, you would qualify for Medicaid instead, which is a better outcome. In non-expansion states, there is a coverage gap for people below 100% FPL who do not qualify for Medicaid.
If you are deliberately reducing MAGI, make sure you stay above the 100% FPL floor in a non-expansion state, or understand that Medicaid may be the right program for you.
Check your state's Medicaid income limits here.
Check Your Eligibility Before Open Enrollment
All of these strategies work best when you run the numbers before the plan year starts, not after. Marketplace open enrollment for 2026 coverage typically runs from November 1 through January 15. By October, you should have a good estimate of your projected annual income and know how close you are to subsidy thresholds.
Use CoveredUSA's screener to see your current eligibility based on your expected income. If you are close to a threshold, work with a tax professional or licensed agent to identify the right combination of contributions and deductions to optimize your MAGI before enrollment closes.
Check your eligibility now at CoveredUSA -- it takes 2 minutes.
Check your ACA eligibility at CoveredUSA
Frequently Asked Questions
What is MAGI for ACA purposes?
MAGI for ACA subsidies is your Adjusted Gross Income (AGI) plus tax-exempt Social Security benefits, tax-exempt interest, and excluded foreign income. Most common above-the-line deductions such as traditional IRA contributions, HSA contributions, and self-employed health insurance premiums reduce your AGI and therefore your ACA MAGI.
Does a traditional IRA contribution reduce my ACA MAGI?
Yes. Traditional IRA contributions are deducted above the line, which lowers your AGI and your ACA MAGI. The 2026 limit is $7,500 ($8,600 if you are 50 or older). The deduction may be limited if you or your spouse are covered by a workplace retirement plan and your income exceeds the phase-out range.
Does a Roth IRA contribution reduce my ACA MAGI?
No. Roth IRA contributions are made with after-tax dollars and do not reduce your income or your ACA MAGI. Only traditional (pre-tax) IRA contributions provide a deduction.
What is the ACA subsidy cliff in 2026?
The subsidy cliff is the point at which your income exceeds 400% of the Federal Poverty Level and your entire premium tax credit disappears. In 2026, that threshold is $62,600 for a single person and $128,600 for a family of four. The enhanced subsidies that temporarily removed this cliff expired after 2025.
Can I lower my MAGI for ACA subsidies if I have a W-2 job?
Yes. W-2 employees can contribute to a traditional IRA (deductible if you are not covered by a workplace plan, or within income limits if you are), fund an HSA if enrolled in an HSA-eligible health plan, and take above-the-line deductions such as student loan interest. 401(k) and 403(b) contributions through your employer also reduce your taxable income and AGI, which indirectly reduces ACA MAGI.
Do 401(k) contributions lower ACA MAGI?
Traditional pre-tax 401(k) contributions reduce your W-2 taxable wages, which lowers your AGI, which lowers your ACA MAGI. If you are not maxing out your 401(k), increasing contributions is one of the most effective MAGI-reduction tools for W-2 employees. The 2026 employee 401(k) contribution limit is $24,500 ($32,500 if 50 or older).
How far in advance do I need to plan MAGI reduction?
Ideally, throughout the year. 401(k) contributions must be set before the end of the calendar year. HSA contributions can be made up to April 15 of the following year (same as the tax filing deadline). Traditional IRA contributions can also be made up to the tax filing deadline for the prior year, which gives you a window to see your final income and make a precise contribution to hit a target MAGI.
What if my income changes mid-year and I go over the subsidy cliff?
Report income changes to the marketplace as soon as they happen. If you end up over 400% FPL at tax time, you will owe back some or all of the advance premium tax credits you received during the year. Reducing your MAGI through eligible deductions before you file your taxes can offset some of this repayment.
