Boston Homeowners: What You Actually Need to Itemize on Schedule A
If you own a home in Boston, 2025 is the first year in a while worth taking a second look at itemizing. The One Big Beautiful Bill Act raised the SALT deduction cap from $10,000 to $40,000 — a change big enough that homeowners who've defaulted to the standard deduction for years may now come out ahead by itemizing instead.
What Actually Qualifies on Schedule A in 2025
Mortgage interest — on up to $750,000 of acquisition debt for loans originated after December 15, 2017 (older loans keep the $1 million limit)
State and local taxes (SALT) — property tax plus either state income or sales tax, capped at $40,000 for 2025 (up from $10,000), phasing down for income over $500,000 MAGI
Charitable contributions — cash gifts up to 60% of your AGI
Medical expenses — only the portion exceeding 7.5% of your AGI
Why This Is Worth Revisiting Now
For 2025, the standard deduction is $15,750 (single), $31,500 (married filing jointly), or $23,625 (head of household). Itemizing only helps if your Schedule A total beats that number. Under the old $10,000 SALT cap, a lot of Boston homeowners with high property taxes never got close — the deduction was capped long before mortgage interest and charitable giving even entered the picture. At $40,000, that math has changed for a lot of people.
One Thing Most Boston Homeowners Get Wrong
Itemizing only affects your federal return. Massachusetts doesn't offer a state-level deduction for mortgage interest or property taxes at all — Schedule Y, the list of deductions Massachusetts actually allows, covers specific items like the rental deduction, commuter costs, college tuition, and student loan interest, but homeownership costs aren't on it. However much you paid in mortgage interest or property tax this year, your Massachusetts return doesn't see it.
Do the Math Before You Assume Either Way
Add up your mortgage interest, SALT (capped at $40,000), charitable giving, and medical expenses over the 7.5% threshold. If that total is higher than your standard deduction, itemizing saves you money on your federal return. If it isn't, the standard deduction is simpler and just as effective — there's no bonus for itemizing if it doesn't actually beat the number.
We Handle This For You
Figuring out which side of that line you land on — and preparing Schedule A correctly if you do — is exactly what FastFile1040's Basic plan covers: W-2 income, mortgage interest, and itemized deductions, prepared by a professional for a flat $400, plus your Massachusetts return.
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