This is a math problem with one rule
Every filer gets a choice: subtract a flat standard deduction, or itemize actual expenses on Schedule A. Whichever number is bigger wins. That is the entire decision. No strategy, no philosophy, no “itemizing looks more professional.” Bigger number wins.
The reason this page exists is that the numbers moved, twice, and a decision you made years ago may now be wrong.
The flat number is big
For tax year 2025, the return filed in 2026, the standard deduction is $15,750 for singles, $31,500 for married filing jointly, and $23,625 for heads of household. For tax year 2026 it steps up to $16,100, $32,200, and $24,150. There are extra amounts for people 65 or older and for blindness, plus a separate new $6,000 senior deduction through 2028 that applies whether you itemize or not.
A married couple needs more than $31,500 of deductible expenses before itemizing pays a single dollar. No mortgage and no unusual year? You will not get there, and you should not try. Take the flat number, file, done.
What goes on the itemized list
Four categories carry virtually every Schedule A.
Mortgage interest, on up to $750,000 of loan principal. State and local taxes, the SALT bucket: income or sales taxes plus property taxes. Charitable contributions, with documentation. And medical expenses, but only the slice above 7.5% of adjusted gross income, which is why medical rarely contributes outside a genuinely bad year.
Now the change that matters. From 2018 through 2024, SALT was capped at $10,000, which single-handedly knocked millions of homeowners out of itemizing. The 2025 reconciliation law raised the cap to $40,000 starting in tax year 2025, phasing back down for incomes above $500,000, with the higher cap scheduled through 2029.
Translation: a homeowner in New Jersey or California paying $25,000 in property and income taxes was capped at $10,000 under last filing season’s logic. Now most or all of it counts. Stack mortgage interest on top and Schedule A beats the standard deduction comfortably for a lot of households that stopped checking years ago.
A ten-minute decision
Run it once a year, in about the time it takes to make coffee.
Add your mortgage interest from Form 1098. Add state income tax withheld (it is on your W-2) plus property taxes, capped at $40,000. Add charitable gifts you can document. Skip medical unless the year was severe. Compare the total to your standard deduction.
Software does this automatically if you feed it the numbers, and that is the catch: it can only compare what you enter. Skip typing in your property taxes because “I never itemize anyway” and the software dutifully confirms your assumption. Enter everything once. Let the comparison be real.
One more habit that makes next year’s ten minutes easier: keep a single folder, paper or digital, where the 1098, the property tax bill, and the donation receipts land as they arrive. The comparison is fast when the inputs are sitting in one place.
Two edge cases worth a professional’s eye. If you are near the line, “bunching” works: concentrate two years of charitable giving into one year, itemize that year, take the standard deduction the next. And if your income is in the SALT phasedown range above $500,000, the marginal math gets strange enough that a CPA earns the fee.
Renters and non-itemizers, one note for 2026
For tax year 2025 returns, charitable gifts only counted if you itemized. Starting with tax year 2026, the law adds a deduction for non-itemizers of up to $1,000 in cash gifts, $2,000 for joint filers. Small, but it is the first time since the pandemic-era provisions that the standard-deduction crowd gets credit for giving. Keep receipts starting now.
Bank the win, whichever way it goes
The point of picking the bigger number is a smaller tax bill, and a smaller bill should show up somewhere you can see it.
If rechecking this decision saved you money this year, and for returning itemizers the SALT change alone can be worth thousands, treat the difference as found money with a destination. A high-yield savings account turns a one-time tax win into a permanent cushion, earning interest instead of evaporating into the checking account. The deduction decision takes ten minutes a year. The transfer takes one more. Do both.