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Schedule A Decision

Should I Itemize or Take the Standard Deduction?

Since the 2017 TCJA roughly doubled the standard deduction (and capped state-and-local tax at $10,000), only about 10% of U.S. filers itemize. But when itemizing wins, it can save thousands — typically homeowners with significant mortgage interest in high-tax states. Enter your numbers below to see the verdict.

From Form 1098. Up to $750k of mortgage debt qualifies.

$

Total state income tax (or sales tax) paid this year.

$

Real estate taxes on your home. Combined with state tax for SALT cap.

$

Cash, goods, or appreciated assets to qualified 501(c)(3)s.

$

Only the amount above 7.5% of AGI is deductible.

$
Standard
$15,000
Itemized total
Wins
$20,000
⚠ SALT capped at $10,000. You paid $13,000 in state + property tax, but only $10,000 is deductible — losing $3,000.
Itemize this year
Your itemized total beats the standard by $5,000. File Schedule A with your return.
Walkthrough

The bunching strategy: get itemizing to work

If your itemized total is close to the standard deduction but doesn't quite beat it, you can bunch two years of charitable contributions into one tax year. In that "stacked" year, your itemized total exceeds the standard and you get a meaningful itemization. In the off year, you take the standard deduction.

Donor-Advised Funds (DAFs) make this clean: contribute 2-3 years of donations to the DAF in your "stacked" year (immediate full deduction), then distribute to charities over time at your normal pace. Fidelity Charitable, Schwab Charitable, and Vanguard Charitable all offer DAFs with low minimums.

Bonus: donate appreciated stock instead of cash. You avoid the capital gains tax on the appreciation AND get the full fair-market-value deduction. Especially powerful if you have stock that's gone up substantially.

What can you itemize on Schedule A?

  • Mortgage interest — up to $750k of mortgage debt (or $1M for loans before Dec 15, 2017)
  • State + local + property taxes — capped at $10,000 combined ($5,000 if married filing separately)
  • Charitable contributions — cash up to 60% of AGI; appreciated assets up to 30%
  • Medical expenses — only the portion exceeding 7.5% of AGI
  • Casualty/theft losses — only in federally declared disaster areas
  • Investment interest — limited to net investment income
Questions

Frequently asked questions

Should I itemize or take the standard deduction in 2025?▾
Take the standard deduction unless your itemized total — mortgage interest + state/local taxes (capped at $10,000) + charitable contributions + medical expenses above 7.5% of AGI — exceeds the standard amount: $15,000 single, $30,000 married filing jointly, $22,500 head of household. After the 2017 TCJA roughly doubled the standard deduction, only about 10% of filers benefit from itemizing — usually homeowners with significant mortgage interest in high-tax states.
What is the SALT cap and how does it affect itemizing?▾
The State And Local Tax (SALT) deduction is capped at $10,000 total per return ($5,000 if married filing separately) — combined limit on state income tax, local tax, and property tax. This cap is the biggest reason itemizing got harder after 2017. High-income earners in California, New York, and New Jersey routinely have $30,000+ in actual state and property taxes but can only deduct $10,000 of it.
What is 'bunching' and how does it help me itemize?▾
Bunching means concentrating two or three years of charitable donations into a single tax year so your itemized total exceeds the standard deduction in that year, then taking the standard deduction in the off-years. A Donor-Advised Fund (DAF) is the standard tool — you contribute multi-year donations into a DAF in one year, get the full deduction now, and distribute to charities over time at your normal pace.
Are mortgage interest and property tax always deductible if I itemize?▾
Mortgage interest is deductible on up to $750,000 of mortgage debt for loans originated after Dec 15, 2017 ($1 million for older loans), on your primary residence and one second home. Property tax is part of the SALT $10,000 cap shared with state income tax. Investment / rental property mortgage interest and property tax go on Schedule E, not Schedule A — they're a different deduction entirely.
Can medical expenses push me into itemizing?▾
Only the portion of unreimbursed medical expenses exceeding 7.5% of your AGI is deductible. So if your AGI is $100,000, only medical above $7,500 counts. Most people don't hit this threshold unless they had a major medical event (surgery, long-term care, IVF). When they do, it can push them well into itemizing.

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Standard vs itemize is just one decision. The full optimizer factors retirement contributions, business deductions, entity choice, energy credits, and rental property in one place.

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