15 Tax Deductions Most People Miss (and How to Claim Them)

Why Most People Overpay on Taxes

The average American taxpayer overpays by $1,200-3,000 per year simply by missing deductions they are legally entitled to claim. That is money you earned sitting in the IRS’s account instead of yours.

The US tax code has hundreds of deductions and credits — but most people only claim the obvious ones. According to the IRS, taxpayers leave an estimated $1 billion in unclaimed deductions on the table every year.

The problem isn’t laziness. It’s that many deductions are poorly publicized, have confusing eligibility rules, or require documentation that people don’t think to keep. This guide covers 15 commonly missed deductions that could save you $1,000 to $10,000 on your tax bill — organized by category so you can quickly find what applies to you.

Filing Status	2026 Standard Deduction	Itemize If You Exceed
Single	$15,200	$15,200
Married Filing Jointly	$30,400	$30,400
Head of Household	$22,800	$22,800
Age 65+ (additional)	+$1,950 (single) / +$1,550 (each, married)	Adjusted threshold

Use our Take-Home Pay Calculator to see how deductions affect your actual paycheck.

Home-Related Deductions

Homeownership is one of the most tax-advantaged positions in the US tax code. These three deductions are frequently missed or underclaimed.

1. Home Office Deduction

If you work from home — even part-time — you may qualify for the home office deduction. There are two methods:

Method	How It Works	Max Deduction	Best For
Simplified	$5/sq ft of office space	$1,500 (300 sq ft max)	Easy — no receipts needed
Regular	Actual expenses x office %	Unlimited	Larger offices, expensive homes

Regular Method = (Office Sq Ft / Total Home Sq Ft) x Total Home Expenses

Who misses this: Freelancers and self-employed workers who assume they need a separate room. A dedicated corner of a room qualifies — it just needs to be used regularly and exclusively for business. A 120 sq ft corner at $5/sq ft is a $600 deduction with zero math.

2. Mortgage Points

If you paid points (prepaid interest) when buying or refinancing your home, those points are fully tax-deductible. Each point equals 1% of the loan amount.

Loan Amount	Points Paid (1 point)	Tax Savings (24% bracket)
$250,000	$2,500	$600
$350,000	$3,500	$840
$500,000	$5,000	$1,200

Purchase points are deductible in the year of purchase. Refinance points must be amortized over the life of the loan — but they are still deductible each year. If you refinanced, check Form 1098 for the points amount.

3. Property Tax Deduction

State and local property taxes are deductible up to $10,000 (combined with state income or sales tax) under the SALT deduction. Many homeowners know about this but forget to include supplemental property tax bills — separate assessments for new construction, special districts, or reassessments that arrive on different statements.

Education and Student Loan Deductions

Education-related deductions are especially valuable because several of them are “above-the-line” deductions — meaning you can claim them even if you take the standard deduction.

4. Student Loan Interest

You can deduct up to $2,500 in student loan interest paid during the year — even if you don’t itemize. This is an above-the-line deduction available to anyone with modified AGI below $90,000 (single) or $185,000 (married filing jointly).

Tax Savings = Interest Paid (up to $2,500) x Your Marginal Tax Rate

Who misses this: Parents who co-signed student loans. If you are legally obligated on the loan AND make payments, you can deduct the interest even if the student is the primary borrower.

5. Lifetime Learning Credit

The Lifetime Learning Credit provides up to $2,000 per tax return (20% of the first $10,000 in qualified education expenses). Unlike the American Opportunity Credit:

• There is no limit on the number of years you can claim it
• It covers graduate school, professional development courses, and even single courses
• It applies to courses taken to improve job skills — not just degree programs

Feature	American Opportunity Credit	Lifetime Learning Credit
Max benefit	$2,500/year	$2,000/year
Years available	First 4 years of college	Unlimited
Enrollment	At least half-time	Even one course
Scope	Undergrad only	Any higher education

6. Educator Expense Deduction

Teachers (K-12) can deduct up to $300 for classroom supplies purchased out of pocket — without itemizing. This includes books, computer equipment, software, and supplementary materials used in the classroom.

Who misses this: Teachers who assume only physical supplies count. Professional development courses, educational software subscriptions, and COVID-era cleaning supplies all qualify.

Health and Medical Deductions

Healthcare costs are one of the largest expenses for American families. These deductions can offset a significant portion.

7. HSA Contributions

Health Savings Account contributions are triple tax-advantaged — the most powerful tax shelter available to most Americans:

1. Contributions are tax-deductible (reduces your taxable income)
2. Growth is tax-free (no capital gains tax on investments inside the HSA)
3. Withdrawals are tax-free for qualified medical expenses

Year	Individual Limit	Family Limit	Catch-Up (55+)
2026	$4,300	$8,550	+$1,000

Who misses this: People who have an HSA-eligible health plan but don’t contribute — or contribute less than the maximum. Even if your employer contributes, you can add more up to the annual limit.

8. Medical Expenses Above 7.5% of AGI

Out-of-pocket medical expenses that exceed 7.5% of your adjusted gross income are deductible if you itemize. This threshold makes it hard to qualify in most years — but a single expensive event (surgery, dental work, fertility treatment) can push you over.

Qualifying expenses include:

• Health insurance premiums (if not paid pre-tax)
• Dental and orthodontic work
• Vision care (glasses, contacts, LASIK)
• Prescriptions and medications
• Mental health treatment
• Mileage to medical appointments (22 cents/mile in 2026)
• Long-term care insurance premiums (age-based limits)

Deductible Medical = Total Medical Expenses - (AGI x 7.5%)

Charitable and Giving Deductions

Most people remember cash donations, but three commonly overlooked charitable deductions can add $500-5,000+ to your total.

9. Charitable Mileage

Mileage driven for charitable purposes is deductible at 14 cents per mile. If you volunteer regularly and drive to the organization, this adds up quickly.

Weekly Volunteer Driving	Annual Miles	Annual Deduction
20 miles/week	1,040 miles	$146
50 miles/week	2,600 miles	$364
100 miles/week	5,200 miles	$728

Also deductible: tolls and parking fees incurred while volunteering.

10. Donated Goods (Fair Market Value)

Clothing, furniture, electronics, and household items donated to qualified organizations are deductible at fair market value — not what you originally paid.

Keep a detailed list with descriptions, conditions, and estimated values for each item. Take photos before donating. Get a written receipt from the charity with the donation date.

11. Qualified Charitable Distribution (QCD)

If you are 70.5 or older, you can donate up to $105,000 directly from your IRA to a qualified charity. This is one of the most powerful tax moves for retirees:

• The distribution counts toward your Required Minimum Distribution (RMD)
• It is not included in taxable income — effectively a deduction even if you don’t itemize
• It reduces your AGI, which can lower Medicare premiums and reduce Social Security taxation

Investment and Retirement Deductions

These deductions reward you for saving and investing — and the tax savings compound over time.

12. Capital Loss Harvesting

Investment losses can offset capital gains dollar-for-dollar. If your losses exceed your gains, you can deduct up to $3,000 against ordinary income per year, with unlimited carryforward to future years.

Net Capital Loss Deduction = min(Capital Losses - Capital Gains, $3,000)

Who misses this: Investors who hold losing positions “hoping they’ll come back” instead of strategically selling, taking the deduction, and reinvesting in a similar (but not substantially identical) asset. This is called tax-loss harvesting, and sophisticated investors do it systematically every December.

13. IRA Contributions

Traditional IRA contributions are deductible up to $7,000 ($8,000 if 50+) if you meet income limits and are not covered by an employer retirement plan.

Coverage	Filing Status	Full Deduction If AGI Below	Partial Deduction Phase-Out
No employer plan	Any	No limit	Always fully deductible
Employer plan	Single	$79,000	$79,000-$89,000
Employer plan	Married (both covered)	$126,000	$126,000-$146,000
Spouse has employer plan	Married	$236,000	$236,000-$246,000

Even if your spouse has a 401(k), you may still be eligible for a deductible IRA contribution if your combined AGI is below $246,000.

Use our Compound Interest Calculator to see how tax-deferred IRA growth compounds over 20-40 years.

14. Self-Employment Tax Deduction

Self-employed workers pay both the employer and employee portions of Social Security and Medicare taxes — 15.3% total on the first $168,600 of income (2026). You can deduct half of your self-employment tax — the “employer” portion — as an above-the-line deduction.

SE Tax Deduction = (Self-Employment Income x 92.35% x 15.3%) / 2

This deduction reduces your AGI, which can make you eligible for other deductions and credits that have AGI-based phase-outs.

Other Commonly Missed Deductions

15. State Sales Tax (Instead of Income Tax)

If you live in a state with no income tax (like Texas, Florida, Washington, Wyoming, Nevada, Alaska, or South Dakota), you can deduct state sales tax paid instead — up to the $10,000 SALT cap.

The IRS provides a calculator for estimated sales tax based on your income and location. But if you made large purchases during the year (car, boat, home renovation materials), use actual receipts — they typically produce a larger deduction than the IRS estimate.

No-Income-Tax State	Avg. Sales Tax Rate	Sales Tax on $80K Spending
Texas	8.20%	$6,560
Florida	7.02%	$5,616
Washington	9.29%	$7,432
Tennessee	9.55%	$7,640

Bonus: Moving Expenses for Military

While the moving expense deduction was eliminated for most taxpayers in 2018, active-duty military members who move due to a military order can still deduct unreimbursed moving expenses — including travel, lodging, and shipping household goods. This deduction is taken above the line, so it reduces AGI regardless of whether you itemize.

Standard Deduction vs. Itemizing: The Decision Framework

The most important tax decision you make each year is whether to take the standard deduction or itemize. Here is a systematic way to decide:

Quick Tally Method

Add up your four largest potential itemized deductions:

Deduction	Your Amount
Mortgage interest (Form 1098)	$_____
State/local taxes (up to $10,000)	$_____
Charitable contributions	$_____
Medical expenses above 7.5% of AGI	$_____
Total	$_____

If this total exceeds your standard deduction ($15,200 single / $30,400 married), itemize. If it is close (within $1,000-2,000), add up the smaller deductions in this guide — they may push you over.

How to Make Sure You Claim Everything

The best way to catch every deduction is a systematic approach — not guessing at tax time.

Year-Round Habits

1. Keep receipts as you go — use a folder or app (Expensify, Shoeboxed) to photograph receipts immediately. At tax time, you won’t remember that $300 dentist visit in March.

2. Review last year’s return before filing — look for deductions that may recur (mortgage interest, charitable giving, medical expenses) and new ones that apply this year.

3. Track mileage daily — use a free app like MileIQ to automatically log business, medical, and charitable miles. Manual tracking at year-end is inaccurate and loses you money.

4. Maximize tax-advantaged accounts before December 31 — contribute to your HSA, traditional IRA, and 401(k) up to the annual limits.

Tax Filing Strategy

Situation	Best Filing Approach	Expected Extra Savings
Simple W-2, standard deduction	Free tax software (IRS Free File)	$0 — you are fine
Self-employed, under $100K	Premium tax software (TurboTax SE, H&R Block)	$500-3,000
Self-employed, over $100K	CPA or enrolled agent	$2,000-10,000+
Rental income or investments	CPA with investment experience	$1,000-5,000

Your action step: Use our Take-Home Pay Calculator to see your current effective tax rate, then work through this list to identify deductions you are missing. Even finding 2-3 overlooked deductions from this guide could save you $1,000-5,000 on your next tax return.