Every taxpayer must choose one of two deduction methods each year: the standard deduction or itemized deductions. You cannot combine them. The choice is straightforward in theory — take whichever is higher — but knowing when itemizing makes sense requires understanding what qualifies and how to compare.
2025 Standard Deduction Amounts
The standard deduction is a flat amount that reduces taxable income without any documentation required. The IRS adjusts it annually for inflation.
| Filing Status | 2025 Standard Deduction |
|---|---|
| Single | $15,750 |
| Married Filing Jointly | $31,500 |
| Married Filing Separately | $15,750 |
| Head of Household | $23,625 |
Additional Standard Deduction for Age/Blindness
Taxpayers who are 65 or older or legally blind are entitled to an additional deduction:
| Filing Status | Additional Amount (per qualifying person) |
|---|---|
| Single or Head of Household | $2,000 |
| Married Filing Jointly | $1,600 |
A married couple where both spouses are 65+ would add $3,200 to the $31,500 base — a total of $34,700.
Common Itemized Deductions
Itemized deductions are listed on Schedule A of Form 1040. The most significant categories are:
1. State and Local Taxes (SALT) — Cap raised by OBBBA
You can deduct state income taxes (or sales taxes, if higher) plus property taxes. Under OBBBA (signed July 2025), the SALT deduction cap is $40,000 per return for 2025 ($20,000 MFS), rising to $40,400 ($20,200 MFS) for 2026 per OBBBA’s 1% annual indexing — a major increase from the TCJA-era $10,000 cap. The cap is reduced by 30% of MAGI above $500,000 ($250,000 MFS) in 2025 — $505,000 ($252,500 MFS) in 2026 — reverting toward a $10,000 floor ($5,000 MFS) for high earners.
In high-tax states like California, New York, or New Jersey, this cap is frequently reached with property taxes alone.
2. Mortgage Interest
Interest paid on a mortgage for your primary or secondary home is deductible if the loan was used to buy, build, or substantially improve the property. The deduction applies to loan balances up to:
- $750,000 for mortgages taken out after December 15, 2017
- $1,000,000 for older mortgages (grandfathered)
Home equity loan interest is only deductible if the funds were used for home improvement.
3. Charitable Contributions
Cash donations to qualifying 501(c)(3) organizations are deductible up to 60% of AGI. Non-cash donations (clothing, household items) are deductible at fair market value, with specific documentation requirements for gifts over $500.
Donations of appreciated securities directly to charity avoid capital gains tax on the appreciation and still generate a deduction at fair market value — often more tax-efficient than selling and donating cash.
4. Medical Expenses
Only medical expenses exceeding 7.5% of AGI are deductible. This high threshold means only taxpayers with very large medical bills relative to income typically benefit.
For example, if your AGI is $80,000, the floor is $6,000. If you paid $9,000 in qualifying medical expenses, you can deduct $3,000.
Qualifying expenses include doctor visits, prescriptions, surgeries, dental and vision care, health insurance premiums (if not paid pre-tax), and long-term care insurance premiums (age-based limits apply).
5. Casualty and Theft Losses
Since the TCJA, personal casualty losses are deductible only if they result from a federally declared disaster. The deductible amount is the loss exceeding 10% of AGI, minus $100.
The Breakeven Analysis
The breakeven point is where your total itemized deductions equal the standard deduction for your filing status. To itemize, your total must exceed the standard deduction.
Example: Single Filer
| Deduction | Amount |
|---|---|
| Mortgage interest | $8,200 |
| State income tax | $6,000 |
| Property tax | $4,200 |
| SALT (capped at $40,000 under OBBBA) | $10,200 |
| Charitable contributions | $1,500 |
| Total itemized | $19,900 |
| Standard deduction (2025) | $15,750 |
| Benefit from itemizing | $4,150 |
This single filer benefits by itemizing. The $4,150 difference reduces taxable income by that amount beyond what the standard deduction provides.
Example: Married Filing Jointly
| Deduction | Amount |
|---|---|
| Mortgage interest | $9,000 |
| SALT (capped at $40,000 under OBBBA) | $14,000 |
| Charitable contributions | $3,000 |
| Total itemized | $26,000 |
| Standard deduction (2025) | $31,500 |
| Take standard deduction | Save $5,500 in taxable income |
This couple should take the standard deduction. Their itemized total falls $5,500 short.
Who Is Most Likely to Benefit From Itemizing?
Itemizing tends to be advantageous for:
- Homeowners with large mortgages — substantial interest in early loan years
- High-tax state residents — the $40,000 SALT cap (under OBBBA 2025+) is meaningful, especially with property taxes, though it phases out for MAGI above $500,000
- High charitable givers — donors who give 10% or more of income to charity
- Taxpayers with major medical events — high out-of-pocket costs relative to AGI
- Older homeowners — if a mortgage is nearly paid off but they still have high property taxes and state income taxes
Most renters and those in low-tax states will take the standard deduction, as their itemizable expenses rarely exceed the standard amounts.
The SALT Cap and Its Impact
Before 2018, the SALT deduction was unlimited. TCJA capped it at $10,000 for 2018–2024. OBBBA raised the cap to $40,000 ($20,000 MFS) starting in 2025 with a phaseout above $500,000 MAGI. A California homeowner paying $15,000 in property taxes and $18,000 in state income taxes who used to lose $23,000 of deductions under the old $10,000 cap can now deduct the full $33,000 up to the $40,000 ceiling, provided MAGI stays under the phaseout threshold.
OBBBA made the TCJA individual provisions permanent — the SALT cap and the rest of the itemized-deduction framework no longer sunset after 2025.
Bunching Strategy
If your itemized deductions consistently fall just below the standard deduction threshold, consider bunching: concentrating deductions in alternating years.
For example, instead of donating $3,000 per year to charity, donate $6,000 every other year. In the donation year, your total itemized deductions may exceed the standard deduction, generating a larger tax benefit. In the off year, take the standard deduction.
Donor-Advised Funds (DAFs) facilitate bunching for charitable giving: you contribute a lump sum to the DAF (claiming the full deduction in that year) and then recommend grants to charities over several years. This lets you bunch the deduction without front-loading the actual charitable distributions.
You Must Decide Each Year
Filing status, income, and deductible expenses change from year to year. A year with significant medical expenses, a new home purchase, or large charitable giving may push you over the threshold. Run the comparison annually rather than assuming last year’s choice still applies.
Key Takeaways
- Under OBBBA, the 2025 standard deduction is $15,750 (single), $31,500 (MFJ), or $23,625 (head of household), rising to $16,100 / $32,200 / $24,150 in 2026.
- Itemize only if your total Schedule A deductions exceed the standard deduction.
- The most impactful itemized deductions are mortgage interest, SALT (capped at $40,000 for 2025 and $40,400 for 2026 under OBBBA, phasing down above $500,000 MAGI toward a $10,000 floor), and charitable contributions.
- Medical expenses are only deductible above 7.5% of AGI — a high bar for most taxpayers.
- The bunching strategy lets you alternate between itemizing and taking the standard deduction to maximize benefits over two-year cycles.
- OBBBA (signed July 2025) made the elevated standard deduction, raised SALT cap, and $2,200 child tax credit permanent — the feared TCJA sunset no longer applies.