Data Notice: The deduction and credit data in “Itemized Deductions: Complete Guide 2026” uses projected 2026 amounts from IRS inflation indexing. Phase-out ranges and qualifying criteria may change with new legislation. Verify with IRS publications and a qualified tax advisor. [itemized-deductions-guide-2026]

Itemized Deductions: Complete Guide 2026

This article about itemized deductions: complete guide 2026 provides general tax education and is not a substitute for professional tax advice. Laws and regulations discussed here may have changed since publication. Work with a licensed tax advisor for decisions affecting your specific tax situation.

Itemized deductions allow taxpayers to reduce their taxable income by claiming specific qualifying expenses on Schedule A of the federal tax return, instead of taking the standard deduction. For 2026, itemizing benefits filers whose total qualifying expenses exceed the standard deduction of approximately ~$15,350 (single) or ~$30,700 (married filing jointly). The Tax Cuts and Jobs Act (TCJA) provisions have been made permanent by the One Big Beautiful Bill Act, with the notable change of raising the SALT cap to ~$40,000. Taxpayers should review the current rules carefully.

2026 Standard Deduction vs. Itemized Threshold

Filing Status	Standard Deduction	Itemize If Deductions Exceed
Single	~$15,350	~$15,350
Married Filing Jointly	~$30,700	~$30,700
Head of Household	~$23,050	~$23,050
Married Filing Separately	~$15,350	~$15,350

Categories of Itemized Deductions

Medical and Dental Expenses

You may deduct unreimbursed medical and dental expenses that exceed ~7.5% of your adjusted gross income. Qualifying expenses include:

Doctor, dentist, and hospital fees
Health insurance premiums (if not paid with pre-tax dollars)
Prescription medications
Long-term care insurance premiums (subject to age-based limits)
Transportation for medical care
Medically necessary home improvements

State and Local Taxes (SALT)

The SALT deduction allows you to deduct state and local taxes paid, including:

State and local income taxes OR state and local sales taxes (choose one)
Property taxes on real estate

The SALT deduction cap has been raised to ~~$40,000 (~~$20,000 for married filing separately) by the One Big Beautiful Bill Act, up from the original TCJA cap of $10,000. The ~$40,000 cap phases out for taxpayers with MAGI above ~$500,000 and reverts to $10,000 after approximately 5 years.

Mortgage Interest

You may deduct interest paid on mortgage debt used to buy, build, or substantially improve your primary residence and one additional residence. The TCJA limited this deduction to interest on the first ~~$750,000 of mortgage debt (~~$375,000 for married filing separately). Interest on home equity loans is deductible only if the loan proceeds were used for home improvements.

Charitable Contributions

Deductible charitable contributions include:

Cash donations to qualifying organizations (up to ~60% of AGI for cash contributions)
Fair market value of donated property (up to ~30% of AGI for long-term capital gain property)
Mileage for charitable purposes (~$0.14 per mile)
Documented out-of-pocket expenses for volunteer work

Donations to individuals, political organizations, and candidates are not deductible.

Casualty and Theft Losses

Casualty and theft losses are deductible only if they result from a federally declared disaster. The loss must exceed ~$100 per event, and total losses must exceed ~10% of AGI.

Other Itemized Deductions

Gambling losses: Deductible up to the amount of gambling winnings reported as income
Certain unrecovered investment in pension: If you contributed after-tax dollars to an employer pension and pass away before recovering the full amount
Impairment-related work expenses: For disabled individuals who have work-related impairment expenses

Common Mistakes to Avoid

Not comparing to the standard deduction. Many filers assume itemizing is better without actually totaling their expenses. The higher standard deduction under TCJA eliminated the benefit for many taxpayers.
Forgetting the SALT cap. The ~$40,000 SALT deduction cap (with phaseout above ~$500,000 MAGI) catches many filers in high-tax states. Track your total to avoid overdeducting.
Lacking documentation for charitable gifts. Cash donations over ~$250 require a contemporaneous written acknowledgment from the charity. Noncash donations over ~$500 require Form 8283.
Including non-deductible medical expenses. Cosmetic surgery, gym memberships, and nonprescription supplements generally are not deductible medical expenses.
Missing the AGI threshold for medical expenses. Only the portion exceeding ~7.5% of AGI is deductible, which limits the benefit for higher-income filers.
Deducting mortgage interest on excessive debt. Interest on mortgage debt above ~$750,000 is not deductible under current rules.

Key Takeaways

Itemize only if your total qualifying expenses exceed the standard deduction (~$15,350 single; ~$30,700 joint)
The SALT deduction cap has been raised to ~$40,000 by the One Big Beautiful Bill Act (phaseout above ~$500,000 MAGI)
Medical expenses are deductible only above ~7.5% of AGI
Mortgage interest is deductible on the first ~$750,000 of acquisition debt
Charitable contributions have various AGI-based limits depending on the type of contribution
Document all deductions thoroughly; the IRS can disallow claims without proper substantiation

Next Steps

Standard Deduction Guide 2026 — Compare the standard deduction to your potential itemized total.
Federal Income Tax Guide 2026 — See how deductions fit into your overall return.
State Income Tax Rates Comparison 2026 — Understand the SALT deduction in context of your state taxes.
IRS Audit Guide — Learn how to substantiate your deductions if audited.
Find a CPA Near You — Get professional help optimizing your deduction strategy.