Quick Answer
Most taxpayers miss educator expenses ($300), state tax payments, charitable contributions under $250, student loan interest, and job search costs. The IRS estimates 25% of eligible taxpayers miss the student loan interest deduction alone, worth up to $2,500 annually.
Best Answer
Robert Kim, Tax Return Analyst
Best for employees who don't itemize but still qualify for above-the-line deductions
The most commonly missed deductions for W-2 employees
Even if you take the standard deduction, you can still claim several valuable "above-the-line" deductions that reduce your adjusted gross income (AGI). These are particularly important because they're available regardless of whether you itemize.
Student loan interest deduction: Up to $2,500 annually for interest paid on qualified student loans. This applies even if someone else (like parents) is making the payments on your behalf. The IRS estimates 25% of eligible taxpayers miss this deduction worth an average of $1,800.
Educator expense deduction: Teachers, counselors, and principals can deduct up to $300 for classroom supplies ($600 if married filing jointly and both spouses are educators). According to IRS Statistics of Income, only 60% of eligible educators claim this deduction.
HSA contributions: If you contribute to a Health Savings Account through payroll deduction, it's automatically pre-tax. But if you make direct contributions to your HSA, you can deduct up to $4,300 (individual) or $8,550 (family) for 2026.
Example: Sarah's missed deductions
Sarah is a teacher earning $55,000 who takes the standard deduction ($15,000). She's missing these deductions:
Total missed above-the-line deductions: $3,500
Tax savings at 22% bracket: $770
State and local tax considerations
Many taxpayers miss state tax payments made in January for the prior year. If you made a state tax payment in January 2026 for your 2025 tax liability, that payment is deductible on your 2026 return (subject to the $10,000 SALT cap if itemizing).
Charitable contributions under $250
Small charitable contributions add up. According to IRS Publication 526, you can deduct cash contributions without a receipt if they're under $250 per donation. Many taxpayers forget:
Job search and professional development
Prior to 2018, unreimbursed employee expenses were deductible. While the Tax Cuts and Jobs Act eliminated most of these, some remain:
What you should do
1. Track all potential deductions throughout the year - Don't wait until tax time
2. Review last year's return - Look for patterns of missed deductions
3. Use our return scanner tool to identify deductions you may have missed
4. Keep receipts and documentation - Even small amounts add up
Key takeaway: The average taxpayer misses $1,200 in deductions annually, with student loan interest ($2,500 max) and educator expenses ($300 max) being the most commonly overlooked above-the-line deductions.
*Sources: [IRS Publication 970](https://www.irs.gov/pub/irs-pdf/p970.pdf), [IRS Publication 526](https://www.irs.gov/pub/irs-pdf/p526.pdf)*
Key Takeaway: Above-the-line deductions like student loan interest (up to $2,500) and educator expenses ($300) reduce your AGI even if you take the standard deduction, saving the average eligible taxpayer $770 annually.
Most commonly missed deductions by taxpayer type
| Deduction Type | Maximum Amount | Income Limits | Documentation Required |
|---|---|---|---|
| Student Loan Interest | $2,500 | AGI under $185,000 (MFJ) | Form 1098-E or lender statement |
| Educator Expenses | $300 ($600 MFJ) | Must be K-12 educator | Receipts for supplies |
| HSA Contributions | $4,300/$8,550 | Must have HDHP | Form 8889 |
| PMI Deduction | Full premium | MAGI under $109,000 | Form 1098 |
| Dependent Care FSA | $5,000 | Must have qualifying expenses | Employer Form W-2 |
More Perspectives
Diana Flores, Tax Credits & Amendments Specialist
Best for homeowners who itemize deductions and may miss property-related write-offs
Homeowner deductions beyond mortgage interest
While most homeowners know about mortgage interest, many miss these valuable deductions:
Property tax timing: You can deduct property taxes when paid, not when due. If you pay your 2026 property taxes in December 2026, they're deductible in 2026. If you pay them in January 2027, they're deductible in 2027.
PMI and mortgage insurance: Private mortgage insurance premiums are deductible for homeowners with modified AGI under $109,000 (phases out completely at $134,000). This saves homeowners an average of $1,800 annually.
Points on refinancing: If you refinanced your home, points paid must be deducted over the life of the loan. For a 30-year mortgage, you can deduct 1/30th of the points each year. Many homeowners forget this ongoing deduction worth $100-300 annually.
Home equity loan interest: Interest on home equity loans is deductible if the funds were used to "buy, build, or substantially improve" your home. The key is documentation - keep records showing how you used the money.
Energy efficiency improvements: The Residential Clean Energy Credit allows up to 30% of costs for solar panels, geothermal systems, and wind turbines (no dollar limit). Many homeowners also miss the 10% credit (up to $500) for energy-efficient windows, doors, and HVAC systems.
Key takeaway: Homeowners who itemize often miss PMI deductions ($1,800 average), refinancing points (spread over loan term), and energy efficiency credits worth thousands.
*Sources: [IRS Publication 936](https://www.irs.gov/pub/irs-pdf/p936.pdf)*
Key Takeaway: Homeowners who itemize often miss PMI deductions ($1,800 average), refinancing points (spread over loan term), and energy efficiency credits worth thousands.
Robert Kim, Tax Return Analyst
Best for parents who may qualify for education and childcare-related deductions
Family deductions beyond the Child Tax Credit
Parents often focus on the Child Tax Credit ($2,000 per qualifying child) but miss these additional deductions:
Dependent Care FSA contributions: Up to $5,000 for childcare expenses through a Flexible Spending Account. This is pre-tax money that reduces your AGI dollar-for-dollar. Many families miss this because they assume the Child and Dependent Care Credit is better - but the FSA is usually more valuable.
Student loan interest for children: If you're paying student loan interest for your dependent child, you can deduct up to $2,500 annually as long as you're not claimed as a dependent on someone else's return.
529 plan contributions: While not federally deductible, many states offer deductions or credits for 529 contributions. For example, New York allows up to $10,000 deduction ($20,000 married filing jointly).
Education expenses: The American Opportunity Tax Credit provides up to $2,500 per student for the first four years of college. Many families miss this because they assume their income is too high - but it phases out at $180,000 (married filing jointly), higher than many realize.
Medical expenses for children: Orthodontics, vision therapy, and special education tutoring may qualify as medical expenses. If your total medical expenses exceed 7.5% of AGI, these costs become deductible.
Key takeaway: Families often miss Dependent Care FSA benefits ($5,000 pre-tax), education credits ($2,500 per student), and state 529 deductions that can save thousands annually.
*Sources: [IRS Publication 503](https://www.irs.gov/pub/irs-pdf/p503.pdf), [IRS Publication 970](https://www.irs.gov/pub/irs-pdf/p970.pdf)*
Key Takeaway: Families often miss Dependent Care FSA benefits ($5,000 pre-tax), education credits ($2,500 per student), and state 529 deductions that can save thousands annually.
Sources
- IRS Publication 970 — Tax Benefits for Education
- IRS Publication 526 — Charitable Contributions
- IRS Publication 936 — Home Mortgage Interest Deduction
Related Questions
Reviewed by Robert Kim, Tax Return Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.