How to Lower Your MAGI to Qualify for an ACA Subsidy in 2026

What MAGI means for ACA purposes

Marketplace subsidy eligibility is based on ACA-specific Modified Adjusted Gross Income (MAGI), not your gross paycheck or your take-home pay. For most households, MAGI starts with your Adjusted Gross Income (AGI) from your federal tax return (line 11 of Form 1040) and adds back a few specific items, most commonly tax-exempt interest and any excluded foreign income. For the vast majority of Tennessee households, MAGI ends up very close to AGI. That matters because it means pre-tax deductions that lower your AGI also lower the income used to determine whether you're above or below the 400% cliff — this is the lever most households actually have control over.

Contributions that reduce MAGI

• Traditional 401(k) or 403(b) contributions. Pre-tax contributions through a workplace retirement plan reduce your reported wages for AGI purposes, which flows through to MAGI.
• Traditional IRA contributions. If you or your spouse aren't covered by a workplace plan (or fall under the income limits when you are), deductible traditional IRA contributions lower AGI directly.
• HSA contributions. If you're enrolled in an HSA-eligible high-deductible plan, HSA contributions are an above-the-line deduction that reduces AGI regardless of whether you itemize. HSA access was expanded under recent federal legislation for 2026, giving more households this option.
• SEP-IRA, Solo 401(k), or SIMPLE IRA contributions. For self-employed Tennesseans and small business owners, these retirement vehicles allow substantially larger pre-tax contributions than a standard IRA, making them one of the more powerful MAGI-reduction tools available. See our self-employed subsidy cliff guide for specifics.
• Self-employed health insurance deduction. If you're self-employed and paying your own premiums, that premium cost is generally deductible above the line, which also reduces MAGI. See our self-employed health insurance deduction guide for how this works alongside subsidy eligibility.
• Student loan interest and certain other above-the-line deductions. Smaller in dollar terms, but they stack with the larger contributions above.

Timing income, not just deductions

Beyond deductions, some households have some control over when income is recognized. A year-end bonus, a large freelance invoice, or a Roth conversion can sometimes be deferred into the following tax year if your income is hovering right around the 400% line for the current year. This isn't available to everyone — W-2 employees generally have less flexibility here than self-employed or contract workers — but it's worth discussing with a tax professional if your income naturally fluctuates.

What this isn't

None of the strategies above involve hiding income, underreporting earnings, or claiming deductions you're not entitled to — they're standard, IRS-sanctioned ways to reduce taxable income that happen to also reduce ACA-specific MAGI. There's also no guarantee that maximizing contributions gets a specific household back under 400% FPL; it depends on how much room exists between your income and the threshold for your household size. And contributing to a retirement account or HSA means that money is no longer available for current spending, so it's worth weighing the subsidy benefit against your household's actual cash flow needs, not treating it as a free win.

When to bring in a tax professional

Because MAGI calculations interact with contribution limits, workplace plan coverage rules, and your overall tax situation, it's worth running the numbers with an accountant or tax preparer before making large contribution decisions late in the year. A licensed insurance agent can tell you where your household sits relative to the 400% threshold and roughly how much MAGI reduction would matter; a tax professional can confirm the most efficient way to get there given your specific tax situation.

Related guides

• The 2026 subsidy cliff, explained
• Am I over the 400% FPL cliff? Calculator
• Coverage options above the subsidy cliff
• Self-employed and over the cliff: what to do
• Small business tax write-offs guide