Itemized Deductions
Itemized Deductions
Quick Definition
Itemized deductions are a list of specific eligible expenses that you can subtract from your Adjusted Gross Income (AGI) — reported on Schedule A of Form 1040 — as an alternative to the standard deduction. You itemize when your total eligible expenses exceed the standard deduction, resulting in lower taxable income and a smaller tax bill.
What It Means
Itemizing requires tracking and documenting your actual deductible expenses throughout the year. Since the Tax Cuts and Jobs Act (TCJA) of 2017 nearly doubled the standard deduction, only about 11% of taxpayers now itemize — down from roughly 30% before. For those who do itemize, the savings can be substantial.
The calculation is simple: add up all your Schedule A deductions. If the total exceeds your standard deduction ($14,600 single / $29,200 married for 2024), itemize. Otherwise, take the standard deduction.
Main Categories of Itemized Deductions
1. State and Local Taxes (SALT) — Capped at $10,000
| SALT Component | Deductible? | Notes |
|---|---|---|
| State income taxes paid | Yes (capped) | Or state sales taxes — whichever is higher |
| Local income taxes | Yes (capped) | Combined SALT cap: $10,000 ($5,000 MFS) |
| Property taxes (real estate) | Yes (capped) | Primary and vacation homes |
| Foreign income taxes | No (separate foreign tax credit) | Use Form 1116 instead |
| Car registration fees (ad valorem portion) | Yes (capped) | Only the value-based portion |
The $10,000 SALT cap was introduced by the TCJA in 2018 — significantly limiting itemized deductions for residents of high-tax states like California, New York, and New Jersey.
2. Mortgage Interest
| Type | Deductibility |
|---|---|
| Primary home mortgage interest | Yes — on first $750,000 of acquisition debt (post-2017 loans) |
| Second home mortgage interest | Yes — combined with primary within $750,000 limit |
| HELOC/home equity loan interest | Yes — only if used to buy, build, or improve the home |
| Investment property mortgage | Deducted on Schedule E, not Schedule A |
| Mortgage insurance premiums (PMI) | Sometimes — expired; Congress has intermittently extended |
Acquisition debt limit: Loans used to buy, build, or substantially improve your home. Prior to TCJA (pre-2018 loans), the limit was $1 million.
3. Charitable Contributions
| Contribution Type | Limit | Notes |
|---|---|---|
| Cash to public charities | 60% of AGI | Most common |
| Appreciated stock to public charities | 30% of AGI | No capital gains; deduct FMV |
| Non-cash property | 30% of AGI (50% for certain gifts) | Form 8283 for gifts over $500 |
| Contributions to private foundations | 30% of AGI (cash) / 20% (stock) | More restrictive |
| Carryforward | 5 years | Unused deductions carry forward |
Substantiation rules:
- Cash gifts under $250: bank record or receipt required
- Cash gifts $250+: written acknowledgment from the charity
- Non-cash gifts over $500: Form 8283; over $5,000: qualified appraisal
4. Medical and Dental Expenses
Only expenses exceeding 7.5% of AGI are deductible:
Deductible Medical Expenses = Total Qualifying Medical Expenses - (7.5% × AGI)
| Deductible | Not Deductible |
|---|---|
| Health insurance premiums (not employer-subsidized) | Cosmetic surgery (non-medically necessary) |
| Long-term care insurance premiums | Gym memberships |
| Out-of-pocket medical, dental, vision | Teeth whitening |
| Prescription drugs | Over-the-counter drugs (with exceptions) |
| Medical equipment and devices | |
| Ambulance and transportation for medical care |
Example: AGI = $80,000; medical expenses = $9,000.
- 7.5% × $80,000 = $6,000 threshold
- Deductible portion = $9,000 - $6,000 = $3,000
5. Casualty and Theft Losses
Post-TCJA, deductible only for losses in federally declared disaster areas:
- Net loss after insurance reimbursement, minus $100 per event, minus 10% of AGI
- Significantly restricted compared to pre-2018 rules
6. Miscellaneous Deductions
Post-TCJA, most miscellaneous deductions (unreimbursed employee expenses, investment advisory fees, tax preparation fees) were eliminated through 2025. Only a few remain deductible:
- Gambling losses (up to gambling winnings)
- Some casualty losses (disaster areas only)
- Certain legal fees related to producing taxable income
The Itemizing Decision: Example
| Taxpayer | Filing Status | Deductible Expenses | Standard Deduction | Decision |
|---|---|---|---|---|
| Renter, no donations | Single | $2,000 (SALT only) | $14,600 | Take standard |
| New homeowner | MFJ | $18,000 (mortgage $12K + SALT $6K) | $29,200 | Take standard |
| High-mortgage homeowner | MFJ | $32,000 (mortgage $22K + SALT $10K) | $29,200 | Itemize |
| Large charitable donor | Single | $20,000 (SALT $10K + charity $10K) | $14,600 | Itemize |
| Major medical year | Single | $18,000 total | $14,600 | Itemize |
Bunching Strategy
Since you can only choose one method per year, "bunching" concentrates deductions into alternating years to maximize itemizing in some years while taking the standard deduction in others:
Example — $8,000/year charitable budget:
- Normal approach: $8,000/year → $8,000 + $10,000 SALT = $18,000 (under $29,200 MFJ standard deduction) — always take standard
- Bunching approach: $16,000 in odd years → $16,000 + $10,000 SALT = $26,000 still under... but with $26K + mortgage interest may itemize; use donor-advised fund (DAF) to front-load contributions
A Donor-Advised Fund (DAF) is the perfect bunching vehicle: contribute multiple years' worth of charitable giving in one year, take the large deduction, then distribute grants to charities over subsequent years at your own pace.
Key Points to Remember
- Itemize only if total Schedule A deductions exceed your standard deduction
- The SALT cap ($10,000) is the biggest restriction for high-tax-state residents
- Mortgage interest on up to $750,000 of acquisition debt is deductible
- Medical expenses are only deductible above the 7.5% of AGI threshold
- Charitable contributions carry forward 5 years if you exceed AGI limits
- The bunching strategy + Donor-Advised Fund can multiply tax benefits for consistent charitable givers
Frequently Asked Questions
Q: Can I itemize some deductions and take the standard deduction for others? A: No. It is an either/or choice for each tax year — you either take the standard deduction or itemize all Schedule A deductions. You cannot mix and match within a year.
Q: Are all deductions on Schedule A limited to the list above? A: Yes — Schedule A is the comprehensive list of allowable itemized deductions. Congress strictly controls what qualifies. Unlike some countries, the US tax code does not allow a general "necessary and ordinary" personal expense deduction — only specific congressionally authorized items.
Q: What records do I need to itemize? A: Mortgage Form 1098 (from lender), property tax statements, charitable donation receipts and acknowledgment letters, medical bills and insurance EOBs, state income tax paid (from prior year return or state records), and any other receipts supporting your claimed deductions. Keep these for at least 3-7 years in case of audit.
Related Terms
AGI (Adjusted Gross Income)
Adjusted Gross Income is your total gross income minus specific above-the-line deductions, serving as the critical number that determines eligibility for tax credits, deductions, and retirement account contributions.
Tax Deduction
A tax deduction reduces your taxable income, lowering the amount of income subject to federal tax — with the actual tax savings equal to the deduction amount multiplied by your marginal tax rate.
Standard Deduction
The standard deduction is a fixed dollar amount that reduces your taxable income based on your filing status — allowing most Americans to lower their tax bill without itemizing individual deductions.
Taxable Income
Taxable income is the portion of your income subject to federal income tax after subtracting all allowable deductions from your AGI — the number your tax bracket rates are actually applied to.
10-K
A 10-K is the comprehensive annual report publicly traded companies must file with the SEC, containing audited financials, risk factors, and management's full analysis of business performance.
10-Q
A 10-Q is the quarterly financial report that publicly traded companies must file with the SEC within 40-45 days of each quarter end, providing unaudited financial statements and management's discussion of results.
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