Itemize vs Standard Deduction Calculator 2027

Compare itemizing (Schedule A) vs taking standard deduction 2027 — $14,600 single / $29,200 joint. Itemize wins for high-mortgage, high-SALT, big-charity filers.

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2027 Standard Deduction

Single: $14,600. Married Joint: $29,200. HoH: $21,900. Indexed annually for inflation. OBBB made TCJA-doubled standard permanent. Age 65+ or blind: add $1,550 single / $1,250 joint each box.

SALT Cap = Game-Changer

TCJA + OBBB cap state+local tax deduction at $10,000 (single or joint). Before TCJA, high-tax-state homeowners often had $15-25k+ SALT alone. Cap kills most itemizing for middle-class.

Mortgage Interest Limits

Itemize interest on first $750k of acquisition mortgage (post-Dec 2017). HELOC interest only deductible if used for home improvement. Refi keeps old grandfathered $1M limit if original was pre-2018.

Bunching Strategy

If close to standard threshold, BUNCH 2 years of charity into 1 calendar year. E.g., donate $9k in Dec 2027 + $0 in 2028. Itemize one year, standard the next. Higher total deductions over 2 years.

Source: irs.gov 2027 standard deduction announcement, irs.gov Publication 17. Last updated: May 2026.