Every year, millions of taxpayers leave money on the table because they do not know about deductions they qualify for. Some deductions are well-known. Others are easy to overlook, especially when life is busy and you are just trying to get your return filed. This guide covers the most commonly missed tax deductions for 2026, with clear explanations of who qualifies and what documentation you need.
Note: The IRS updates limits, thresholds, and eligibility rules regularly. Check IRS.gov or consult a tax professional for the current figures that apply to your 2026 return. This content is for educational purposes only and is not tax or legal advice. Consult a licensed tax professional for guidance specific to your situation.
File your taxes with TurboTax — TurboTax’s deduction finder actively searches for credits and deductions you might miss.
1. Student Loan Interest Deduction
If you paid interest on qualified student loans during the year, you may be able to deduct a portion of that interest even if you do not itemize. This is an “above the line” deduction, meaning it reduces your adjusted gross income directly.
Eligibility phases out at higher income levels — check IRS guidance for the current income thresholds for 2026. The loan must have been taken out to pay for qualified higher education expenses, and you must be legally obligated to pay it (it cannot be someone else’s loan that you are voluntarily helping with).
Your loan servicer should send you a Form 1098-E showing the interest you paid for the year. If you did not receive one, log into your loan servicer account to pull the figure.
2. Educator Expenses Deduction
Teachers and other eligible educators can deduct out-of-pocket expenses they paid for classroom supplies, books, computer equipment, and other materials used in the classroom. This is another above-the-line deduction available even without itemizing.
Eligible educators include kindergarten through 12th grade teachers, instructors, counselors, principals, and aides who work at least 900 hours per school year. Check IRS guidance for the current annual deduction cap, as it is adjusted periodically. Keep all receipts for materials purchased throughout the year.
3. Home Office Deduction (Self-Employed Only)
If you are self-employed and you use part of your home exclusively and regularly for business, you may deduct home office expenses. This can include a portion of your rent or mortgage interest, utilities, insurance, and repairs — calculated based on the percentage of your home used for business.
The IRS also offers a simplified method: a flat rate per square foot of dedicated workspace (check IRS.gov for the current rate), up to a maximum square footage. The simplified method requires less record-keeping but may produce a smaller deduction than the regular method.
Important: this deduction is only available for self-employed individuals. Employees who work from home cannot claim the home office deduction, even if they work remotely full-time.
4. Health Insurance Premiums (Self-Employed)
Self-employed individuals who pay for their own health insurance — including coverage for a spouse, dependents, and children under age 27 — can deduct 100% of those premiums as an above-the-line deduction. This applies to medical, dental, and long-term care insurance premiums.
The deduction is limited to your net self-employment income for the year, and you cannot claim it for any month you were eligible for coverage through an employer-sponsored plan (your own or your spouse’s).
This is one of the more valuable deductions available to the self-employed, and it is commonly overlooked by first-year freelancers who are not yet familiar with it.
Or try H&R Block — H&R Block walks self-employed filers through all applicable deductions including health insurance premiums.
5. IRA Contributions
Contributions to a traditional IRA may be tax-deductible, depending on your income and whether you or your spouse have access to a workplace retirement plan. The deduction phases out at higher income levels for those with workplace plans — check IRS.gov for the current income limits for 2026.
You have until the tax filing deadline (typically April 15) to make an IRA contribution for the prior tax year, even after the calendar year has ended. This means you can make a 2026 IRA contribution as late as April 15, 2027, and still deduct it on your 2026 return.
Contributions to a Roth IRA are not deductible, but Roth accounts offer tax-free growth and withdrawals in retirement.
6. HSA Contributions
If you are enrolled in a high-deductible health plan (HDHP), you may be eligible to contribute to a Health Savings Account (HSA). Contributions to an HSA are tax-deductible (or pre-tax if made through payroll), the money grows tax-free, and withdrawals for qualified medical expenses are tax-free as well.
The IRS sets annual contribution limits for HSAs that are adjusted each year — check IRS.gov for the current limits for self-only and family coverage in 2026. Like IRA contributions, HSA contributions for the prior tax year can be made up until the filing deadline.
If you have an HSA and your employer contributes to it, those employer contributions count toward your annual limit but are not included in your taxable income — a frequently misunderstood point.
7. Job Search Expenses
Job search expenses were once widely deductible but current tax law limits this deduction significantly. As of this writing, unreimbursed employee expenses including job search costs are not deductible for most taxpayers due to the suspension of miscellaneous itemized deductions. However, this is an area of tax law that has changed before — check IRS.gov or consult a tax professional for the current treatment of job search expenses for tax year 2026.
If you are self-employed and incurred costs to find new clients or contracts, those expenses may still be deductible as business expenses on Schedule C. Keep records of any business development costs you incurred.
8. State and Local Taxes (SALT) — Up to the Cap
If you itemize deductions, you can deduct state and local taxes — including state income taxes (or sales taxes, if you choose that option) and property taxes. However, the SALT deduction is capped. Check IRS guidance for the current cap amount for 2026, as this has been a subject of legislative discussion and may change.
For many taxpayers in high-tax states, the SALT cap limits the value of this deduction significantly. If your total SALT taxes are below the cap, make sure you are claiming the full amount. If you are above the cap, you can only deduct up to the limit.
You must choose between deducting state income taxes or state sales taxes — you cannot deduct both. For most people, state income taxes produce the larger deduction, but this can vary in states with no income tax.
9. Charitable Contributions
Cash donations to qualified charitable organizations are deductible if you itemize. Donations must be to IRS-recognized 501(c)(3) organizations — not to individuals, political organizations, or candidates. Keep a bank record or written acknowledgment from the charity for any cash donation.
Non-cash donations such as clothing, furniture, or household goods donated to organizations like Goodwill or the Salvation Army are also deductible at fair market value. The organization should give you a receipt, and for non-cash donations above a certain threshold you will need Form 8283. Check IRS guidance for current thresholds.
Mileage driven for charitable purposes is deductible at the IRS charitable mileage rate (check IRS.gov for the current rate).
Note: the temporary above-the-line deduction for cash charitable contributions that existed during the pandemic has expired. You currently need to itemize to benefit from charitable deductions — but check current IRS guidance as tax law does change.
10. Energy-Efficient Home Improvements
The Inflation Reduction Act expanded tax credits (not just deductions) for energy-efficient home improvements. Credits differ from deductions — a credit reduces your tax bill dollar for dollar, while a deduction reduces your taxable income. These credits can be significant for homeowners who made qualifying upgrades.
Qualifying improvements that may be eligible for credits include:
- Energy-efficient windows, doors, and skylights
- Insulation and air sealing
- Energy-efficient heating and cooling systems (heat pumps, central air, furnaces)
- Water heaters (heat pump water heaters)
- Solar panels and solar water heaters (a separate credit with different rules)
- Home energy audits
The credits, limits, and qualifying product requirements are specific and change with IRS guidance. Check IRS.gov or consult a tax professional to confirm what you qualify for based on 2026 guidance. Keep all receipts and product certifications for home improvements made during the year.
Getting Every Deduction You Deserve
The best way to make sure you are not leaving money on the table is to use tax software with an active deduction finder and to keep organized records throughout the year. Both TurboTax and H&R Block walk you through deduction categories in their interview process and flag opportunities you might have missed.
If your tax situation is complex — significant self-employment income, major life changes, investment sales, or rental property — working with a CPA or enrolled agent can often identify additional savings that outweigh the cost of professional preparation.
Find every deduction you qualify for: File your taxes with TurboTax
Or compare your options: Try H&R Block — their free in-person audit support adds peace of mind if you are claiming larger deductions for the first time.