Above-the-line deductions reduce your adjusted gross income whether or not you itemize. The big ones for business owners: HSA contributions ($4,400 self-only or $8,750 family for 2026), Solo 401(k) and SEP contributions, self-employed health insurance, and half of self-employment tax. Everyone else gets student loan interest, educator expenses, and IRA contributions.

What does "above-the-line" actually mean?

Your tax return computes income in layers. Gross income sits at the top; adjusted gross income (AGI) is gross income minus the adjustments listed in IRC 62; taxable income is AGI minus either the standard deduction or itemized deductions. Above-the-line deductions are the IRC 62 adjustments, the ones subtracted before the line where AGI is computed. You claim them on Schedule 1, and they work whether you take the standard deduction or itemize.

That position in the stack is what makes them powerful. AGI is the number that drives phaseouts across the return: IRA deductibility, the SALT cap phaseout, student loan interest phaseouts, and more. Every dollar of above-the-line deduction lowers AGI, which can unlock or preserve other tax benefits downstream. Lowering AGI is the closest thing to a free lunch in the tax code.

Which above-the-line deductions matter most for business owners?

HSA contributions

Contributions are deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free: the only triple-tax-advantaged account in the code. For 2026 the limits are $4,400 for self-only coverage and $8,750 for family coverage, with a $1,000 catch-up contribution if you are 55 or older. You need qualifying high-deductible health plan coverage, and starting in 2026 bronze and catastrophic marketplace plans count as qualifying coverage. The One Big Beautiful Bill Act also made the telehealth safe harbor permanent and opened HSAs to certain direct primary care arrangements (monthly fees up to $150 individual or $300 family). You cannot contribute once you enroll in Medicare. (IRS, Rev. Proc. 2025-19; IRS, Notice 2026-05 guidance)

Solo 401(k) and SEP IRA

If you are self-employed with no full-time employees other than your spouse, the Solo 401(k) is usually the strongest retirement deduction: $24,500 in employee deferrals for 2026 plus employer profit-sharing contributions, up to $72,000 total ($8,000 catch-up at 50+, $11,250 super catch-up at 60-63 if your plan allows it). The SEP IRA is simpler (employer contributions only, no annual filing) and caps at the lesser of 25% of compensation or $72,000, but it forces you to contribute the same percentage for eligible employees. Both are above-the-line, so they cut AGI directly.

Self-employed health insurance and half of SE tax

Premiums you pay for medical, dental, and vision coverage for yourself, your spouse, and dependents are deductible above-the-line. For S-corp owners who own more than 2% of the company, the premiums must be run through the corporation and reported on the W-2 to qualify, then deducted on the personal return. And the tax code lets you deduct half of your self-employment tax as an adjustment to income, which roughly offsets the fact that employees split payroll tax with their employer while you pay both halves.

What about everyone else?

Above-the-line deductions are not just for business owners:

• Student loan interest: up to $2,500 per year in interest paid on qualified student loans, with an income phaseout the IRS adjusts each year. You do not need to itemize. (IRS Publication 970)

• Educator expenses: up to $350 for eligible educators ($700 if married filing jointly and both spouses qualify, capped at $350 each). Starting in 2026, expenses above $350 can also be deducted as itemized deductions. (IRS Topic No. 458, Educator Expense Deduction)

• Traditional IRA contributions: up to $7,500 for 2026 ($8,600 if you are 50 or older). Deductibility phases out if you or your spouse are covered by a workplace retirement plan: for 2026, the phaseout is $81,000 to $91,000 for single filers and $129,000 to $149,000 for joint filers when the contributing spouse is covered.

• Moving expenses: deductible above-the-line only for active-duty military members moving under orders (and now certain intelligence community members). Everyone else lost this deduction years ago.

What changed recently?

Two waves of legislation reshaped the above-the-line landscape:

The One Big Beautiful Bill Act (2025) expanded HSA eligibility (bronze and catastrophic plans, permanent telehealth safe harbor, direct primary care arrangements, all effective 2026) and made the 20% qualified business income deduction permanent. It also reverted the 1099-K reporting threshold to $20,000 and 200 transactions and raised the 1099-NEC/MISC threshold to $2,000 for payments made after 2025.

New deductions starting in 2025, claimed on the new Schedule 1-A, include up to $25,000 of qualified tips, up to $12,500 of qualified overtime compensation ($25,000 if married filing jointly), and qualified passenger vehicle loan interest. These sit alongside the classic above-the-line adjustments rather than replacing them. (IRS Publication 334)

How do you claim them?

Almost all above-the-line deductions go on Schedule 1 (Form 1040), Additional Income and Adjustments to Income, and flow to your Form 1040. Retirement plan contributions for the self-employed, HSA contributions (with Form 8889), student loan interest, educator expenses, and the SE tax deduction each have their own line. Keep the substantiation: contribution confirmations, Form 5498 for IRAs, the student loan interest statement, receipts for educator expenses. The deduction is only as good as the record behind it.

Updated October 28, 2026.

This article is free educational content, not tax advice for your specific situation. If you want a plan built around your actual numbers, that is what our paid tax planning engagements do.