Tax Deductions Guide: Every Deduction You Might Be Missing

Tax deductions reduce your taxable income, putting money back in your pocket. While most people use the standard deduction, there are dozens of deductions available—some even if you don't itemize. Here's a comprehensive guide to deductions you might be missing.

Most Commonly Missed Tax Deductions (2026)

Above-the-Line Deductions (Available Even Without Itemizing)

Deduction	Max Amount	Who Qualifies
Student loan interest	$2,500	Income under $90K single / $185K married
HSA contributions	$4,300/$8,550	Must have HDHP
Self-employed health insurance	100% of premiums	Self-employed individuals
Traditional IRA contributions	$7,500 ($8,500 if 50+)	Anyone with earned income
Self-employment tax (50%)	~$7,065 max	Self-employed individuals
Educator expenses	$300	K-12 teachers

Itemized Deductions (If They Exceed Standard Deduction)

Deduction	Limit	Notes
State and local taxes (SALT)	$10,000 cap	Property + state income or sales tax
Mortgage interest	$750,000 loan cap	Primary + one second home
Charitable contributions	60% of AGI (cash)	Need receipts over $250
Medical expenses	Exceeding 7.5% of AGI	Often helps seniors and high medical cost years
Home office (self-employed)	Actual expenses or $5/sq ft (max $1,500)	Must be exclusive and regular use

Tax Credits (Worth More Than Deductions)

Credit	Max Amount	Income Limit
Child Tax Credit	$2,000/child	Phase out at $200K single / $400K married
Earned Income Tax Credit	Up to $7,830 (3+ kids)	Varies by filing status and children
Lifetime Learning Credit	$2,000	Income under $90K single
Saver's Credit	$1,000/$2,000	Income under $38,250 single
Child and Dependent Care Credit	$3,000-6,000	All incomes (reduced above $125K)
Energy Efficient Home Credit	Up to $3,200	No income limit

Credits vs. deductions: A $1,000 deduction saves you $220 in taxes (at 22% bracket). A $1,000 credit saves you $1,000 in taxes. Always prioritize claiming all eligible credits. ## How Deductions Work

Standard Deduction vs. Itemizing

Standard deduction (2025 tax year, filing in 2026):

Single: ~$14,600
Married filing jointly: ~$29,200
Head of household: ~$21,900
Additional for 65+: ~$1,550-$1,950

The rule: If your itemized deductions exceed your standard deduction, itemize. Otherwise, take the standard deduction.

Reality check: About 90% of taxpayers use the standard deduction after the 2017 tax reform nearly doubled it.

Above-the-Line Deductions

These reduce your AGI regardless of whether you itemize—everyone can claim them.

Below-the-Line Deductions

These only help if you itemize (and your total itemized deductions exceed the standard deduction).

Above-the-Line Deductions (For Everyone)

Traditional IRA Contributions

Maximum: $7,000 ($8,000 if 50+)

Who qualifies: Anyone with earned income (phase-out if covered by workplace plan)

Full deduction if:

Not covered by workplace plan, OR
Single with MAGI under ~$77,000, OR
Married with MAGI under ~$123,000

HSA Contributions

Maximum (2026): $4,300 individual, $8,550 family Catch-up (55+): Additional $1,000

Requirement: Must have HSA-eligible high-deductible health plan

Triple benefit: Tax deduction + tax-free growth + tax-free medical withdrawals

Student Loan Interest

Maximum: $2,500 per year

Phase-out: Starts at ~$80,000 single, ~$165,000 married

Who qualifies: You paid interest on qualified student loans

Educator Expenses

Maximum: $300 per educator ($600 if both spouses are educators)

Who qualifies: K-12 teachers, principals, counselors, aides

What counts: Books, supplies, equipment, professional development

Self-Employment Tax Deduction

Amount: 50% of self-employment tax paid

Who qualifies: Self-employed individuals

Why: Mirrors the employer portion of FICA taxes that W-2 employees get

Self-Employed Health Insurance

Amount: 100% of premiums paid for yourself, spouse, and dependents

Who qualifies: Self-employed with net profit

Limitation: Can't exceed net self-employment income

SEP IRA and Solo 401(k) Contributions

Maximum SEP: 25% of net self-employment earnings, up to $70,000

Maximum Solo 401(k): $24,500 employee + 25% of earnings (up to $70,000 total)

Alimony Paid

Note: Only for divorces finalized before 2019

Amount: Full amount of qualifying alimony payments

Moving Expenses (Military Only)

Who qualifies: Active-duty military moving due to permanent station change

What counts: Moving household goods and personal effects

Itemized Deductions

State and Local Taxes (SALT)

Maximum: $10,000 ($5,000 married filing separately)

Includes:

State income taxes OR state sales taxes (choose one)
Property taxes
Local income taxes

Strategy: If you live in no-income-tax state, deduct sales tax instead

Mortgage Interest

What qualifies: Interest on up to $750,000 of mortgage debt (homes purchased after Dec 2017)

Includes: First mortgage, second home, home equity loans (if used for home improvement)

How to claim: Use Form 1098 from lender

Charitable Contributions

Cash donations: Up to 60% of AGI Appreciated assets: Up to 30% of AGI

What counts:

Money to qualified 501(c)(3) organizations
Donated property (fair market value)
Volunteer mileage: 14 cents/mile
Out-of-pocket volunteer expenses

Documentation required:

Under $250: Bank statement or receipt
$250+: Written acknowledgment from charity
$500+: Additional records required
Property over $5,000: Appraisal required

Medical and Dental Expenses

Threshold: Only expenses exceeding 7.5% of AGI

What counts:

Health insurance premiums (not pre-tax)
Doctor visits, hospital bills
Prescriptions
Medical equipment
Long-term care insurance premiums
Travel for medical care (22 cents/mile in 2025)

Example: AGI of $75,000, $7,000 in medical expenses

Threshold: 7.5% × $75,000 = $5,625
Deductible amount: $7,000 - $5,625 = $1,375

Casualty and Theft Losses

Limitation: Only federally declared disaster areas

Amount: Losses exceeding $100 per event and 10% of AGI

Business Deductions (Self-Employed)

Home Office Deduction

Requirement: Space used regularly and exclusively for business

Methods:

Simplified: $5 per square foot (up to 300 sq ft = $1,500 max)
Regular: Actual expenses × business use percentage

What counts: Rent/mortgage, utilities, insurance, repairs, depreciation

Vehicle Expenses

Methods:

Standard mileage: 70 cents/mile (2025)
Actual expenses: Gas, insurance, repairs, depreciation

Must track: Mileage logs with dates, destinations, business purpose

Business Equipment and Supplies

Section 179 deduction: Immediate deduction for equipment purchases (up to $1,250,000 in 2026)

Includes: Computers, software, furniture, machinery

Business Insurance

What counts: Professional liability, business property, errors and omissions

Professional Services

What counts: Accountant, lawyer, consultant fees for business

Business Travel

What counts: Transportation, lodging, 50% of meals (business purpose required)

Continuing Education

What counts: Courses, conferences, certifications that maintain or improve skills in current profession

Often Overlooked Deductions

Investment Advisory Fees

Note: No longer deductible for most (2018-2025 tax law change)

Exception: Business investment expenses may be deductible

Gambling Losses

What counts: Losses up to amount of gambling winnings

Requirement: Itemize; winnings must be reported as income

Job Search Expenses

Note: Not deductible 2018-2025 due to tax law changes

Jury Duty Pay Given to Employer

Situation: Employer pays your salary during jury duty but requires you to turn over jury pay

Deduction: Amount turned over to employer

Refinancing Points

What counts: Points paid when refinancing a mortgage (deducted over loan term, not immediately)

Energy Efficiency Credits

Not deductions but valuable credits:

Residential Clean Energy Credit (solar, wind, geothermal): 30% of cost
Energy Efficient Home Improvement Credit: Up to $3,200/year

Clean Vehicle Credits

New electric vehicles: Up to $7,500 Used electric vehicles: Up to $4,000 Income limits apply

Deductions for Specific Situations

Parents

Dependent care FSA (reduces taxable income)
Child and Dependent Care Credit
Adoption Credit and exclusion
Education credits for college students

Students

Tuition and fees (through education credits)
Student loan interest
Work-related education expenses (if itemizing and working)

Retirees

Additional standard deduction (65+)
Medical expense deduction (often easier to hit 7.5% threshold)

Homeowners

Mortgage interest
Property taxes (within SALT limit)
Home office (if self-employed)

Renters

Federal: Generally no deductions for rent

State: Some states offer renter's credit

Maximizing Your Deductions

Bunching Strategy

If your itemized deductions are close to standard deduction:

Strategy: Bunch deductions into alternate years

Example:

Year 1: Make two years of charitable donations, prepay property taxes
Year 1: Itemize at $32,000
Year 2: Take standard deduction at $29,200

Result: $61,200 total deductions over two years vs. $58,400 if using standard deduction both years

Document Everything

Keep receipts for potential deductions
Use apps to track mileage
Save charitable acknowledgment letters
Photograph donated items

Don't Leave Money on the Table

Review this list annually:

Did you contribute to retirement accounts?
Did you pay student loan interest?
Are you eligible for education credits?
Did you make charitable donations (even small ones add up)?
Can you claim home office deduction?

Taking Action

Before Year-End

Project your itemized vs. standard deduction
Consider bunching if close to threshold
Make additional charitable contributions if beneficial
Max retirement contributions
Prepay state taxes if SALT cap not reached

During Tax Preparation

Gather all deduction documentation
Review prior year return for deductions you might miss
Calculate both itemized and standard to compare
Use software or professional to ensure nothing missed

Throughout Year

Track deductible expenses as they occur
Keep organized records
Know which deductions apply to your situation
Adjust withholding based on expected deductions

Every deduction reduces your tax bill. While the standard deduction works for most people, knowing all available deductions ensures you don't pay more than necessary. Review this list carefully—you might find savings you've been missing for years.

Tax Planning vs. Tax Preparation

Tax preparation (what most people do): Filling out forms after the year ends. You report what already happened.

Tax planning (what saves real money): Making strategic decisions throughout the year to minimize taxes:

January: Max out HSA contributions, set 401(k) contribution percentage
March-April: Make IRA contributions for prior year if not yet done
June: Mid-year tax check—are you on track for estimated payments?
September-October: Tax-loss harvest in brokerage accounts, review charitable giving plans
November-December: Roth conversion decisions, accelerate/defer income or deductions, make final charitable contributions, verify withholding
Year-round: Track deductible expenses, maximize pre-tax retirement contributions, bunch itemized deductions in alternating years

The difference: Tax preparation saves you $0 (you are just reporting). Tax planning can save $2,000-10,000+ annually depending on your income and situation. Even a one-time consultation with a CPA ($200-500) can identify opportunities that save multiples of their fee.