Not a filing form
Mortgage-interest deduction estimator
Compare qualified residence interest plus other itemized deductions against a standard-deduction assumption that you type. Nothing here is Schedule A.
Educational illustration for tax year 2025 — verify current IRS publications before use. This is a labeled assumption, not an official current-law rate table.
Required inputs
- Filing-status category (educational label only)
- Estimated qualified residence interest for the year
- A standard-deduction assumption you enter or confirm
Optional: other itemized deductions as one bucket; remaining acquisition indebtedness; points paid this year (flag only — detail lives on the points worksheet).
Teaching formula
Itemized total = qualified residence interest + other itemized bucket. Compare that total with the standard-deduction assumption you entered. If the itemized total is larger, itemizing might exceed the assumption. This page does not hard-code an official current-year IRS standard deduction.
Assumptions and caveats
- Mortgage interest is generally only useful as a federal deduction if the taxpayer itemizes.
- Qualified residence interest rules, dollar limits on acquisition indebtedness, and tracing of home-equity proceeds are simplified here.
- State tax treatment can differ.
- This is not Schedule A. Acquisition-debt limits, home-equity interest limits, AMT, and state conformity are out of scope.