Idaho SALT Cap Calculator
For Idaho filers.
The short answer: At the scenario numbers below, the OBBBA SALT deduction is $3,500 — about $770 back at a 22% rate ($30 per biweekly paycheck).
⚠️ This calculator provides estimates for informational and educational purposes only. It is not tax advice. Results are based on the One Big Beautiful Bill Act (OBBBA) and IRS Schedule 1-A. Consult a qualified tax professional for your specific situation.
Your State's Slice of the $40,000 Cap
Idaho's flat 5.3% (2025) tax plus growing Boise-area property values push SALT past $10,000 for many.
- • Income + property → SALT to $40,000
- • Phase-out above $500,000 MFJ
- • Grocery credit irrelevant here; use taxes paid
Worked Example
A Boise MFJ household, $200,000 MAGI: about $9,500 income tax plus $4,000 property tax.
- • Deductible amount: $3,500
- • Federal income tax savings: $770 (at the 22% marginal rate)
- • Per biweekly paycheck: $30
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Frequently Asked Questions
Did OBBBA help Idaho itemizers?
Yes — households over the old $10,000 cap now deduct fully up to $40,000 (phase-out permitting).
Idaho shifted to flat tax — effect?
It changes your state tax amount; the SALT deduction simply follows taxes paid.