Itemize or Take the Standard Deduction?
How SALT, mortgage interest, and charity stack against this year’s standard deduction — and when itemizing actually cuts federal tax.
By Greg, Editor at Finance Maxx. Published · Updated
You get one federal deduction path: the standard deduction for your filing status, or itemized deductions if they add up to more. You do not get both.
What counts in this model
The itemize vs standard calculator adds:
- SALT (state and local tax), capped at this year’s limit — $40,000 in 2025 and $40,400 in 2026 for most filers ($20,000 / $20,200 married filing separately). High-income phase-down is not modeled. See This year — tax.
- Mortgage interest
- Charitable gifts
- Other itemized amounts you enter
It then compares that total to the IRS standard deduction and estimates federal tax both ways on wages only (no credits).
Worked example (2026, joint)
Standard deduction $32,200. Wages $180,000, SALT $28,000, mortgage interest $14,000, charity $4,000.
- Itemized total: $46,000
- Extra deduction versus standard: $13,800
- If those last dollars of taxable income sit in 22%, rough tax savings ≈ 0.22 × $13,800 ≈ $3,036 in this wages-only model
The $13,800 is not $13,800 of tax savings. If the three lines stay under $32,200, take the standard deduction and skip Schedule A.
After the higher SALT cap
The 2025 Act raised the SALT cap well above the old $10,000 limit. More homeowners in high-tax states will clear the standard deduction than in 2018–2024. Renters with little mortgage interest often still take the standard deduction.
Bunching and one-time spikes
Charity and medical expenses are lumpy. Some households “bunch” two years of gifts into one calendar year so itemizing wins that year and they take the standard deduction the next. This calculator does not plan bunching; it compares this year’s lines. If you are close to the standard deduction, a one-time gift or a large medical year can flip the winner.
Mortgage interest falls as you amortize. A loan that beat the standard deduction in year one may not in year twelve. Re-run when the 1098 changes.
What still does not count here
Medical expenses only help above an AGI floor on a real return — enter the deductible remainder under “other,” do not paste the gross bills. Gambling losses, casualty, and miscellaneous itemized rules are out of scope. Credits (child, education) can dwarf the itemize-versus-standard gap; they live on the federal tax page, not this one.
Continue in the tax season playbook.