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Enter your 2025 numbers to see, side by side, whether the standard deduction or itemizing on Schedule A saves you more — including the age/blind additional standard deduction and the new 2025 OBBBA $6,000 senior deduction, which applies either way.
2025 standard deduction amounts and the age/blind additional standard deduction: Rev. Proc. 2024-40, §2.04 (2025 inflation adjustments), consistent with the 2025 Schedule A / Form 1040 instructions.
SALT cap and phase-down: One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025), amending IRC §164(b)(6) — $40,000 cap for 2025, reduced (not below $10,000) by 30% of the amount by which MAGI exceeds $500,000. Mortgage interest acquisition-debt limits: IRC §163(h)(3), as amended by the Tax Cuts and Jobs Act ($750,000 / $375,000 MFS for debt incurred after 12/15/2017; $1,000,000 / $500,000 MFS grandfathered for earlier debt). Medical expense floor: IRC §213(a) (7.5% of AGI). Charitable AGI percentage limits: IRC §170(b).
| Itemized component | Amount entered | Amount allowed | Note |
|---|---|---|---|
| State & local taxes (SALT) | $0 | $0 | — |
| Mortgage interest | $0 | $0 | Not limited numerically here — see note above |
| Charitable contributions | $0 | $0 | AGI % limits not modeled |
| Medical & dental | $0 | $0 | — |
| Total itemized deduction | $0 |
Note: The OBBBA senior deduction and the SALT cap both technically phase out based on Modified AGI (AGI with certain items like foreign-earned income exclusion added back), not plain AGI. This calculator uses the AGI you entered above as a proxy for MAGI, which is accurate for the large majority of filers who have no foreign-earned income exclusion, foreign housing exclusion, or similar add-back items. If any of those apply to you, your true phase-out may differ slightly — a preparer can confirm the exact number.
This tool provides a simplified, educational ESTIMATE ONLY. It is not tax advice, not a guarantee of any outcome, and does not constitute a completed Schedule A or Form 1040. It does not fully model: the acquisition-debt principal limits on mortgage interest ($750,000 / $1,000,000, or half those amounts if MFS) — it deducts the full interest amount you enter; the AGI percentage limits and carryover rules on large charitable gifts; state income tax treatment (state rules on itemizing/standard deduction often differ from federal); the Alternative Minimum Tax; or any credits. It also uses your entered AGI as a stand-in for Modified AGI when applying the SALT-cap and OBBBA senior-deduction phase-outs, which is accurate for most filers but not all — see the note above. Figures are based on 2025 tax year amounts under Rev. Proc. 2024-40 and the One Big Beautiful Bill Act (P.L. 119-21) as understood at the time this tool was built, and are subject to IRS guidance still being finalized. Always confirm your results with a qualified preparer, such as an Enrolled Agent, before filing. Contact Fulcrum Tax Services for an accurate, personalized calculation.