Side-by-side at $1,000,000 qualified income, 37% bracket
| Field | Utah | Idaho |
|---|---|---|
| Statute | Utah Code § 59-10-1043.2 (Pass-Through Entity Taxpayer Income Tax Credit / SALT Report) | Idaho Code § 63-3026B (Affected Business Entity Election) |
| Election deadline | Election made online by filing Form TC-75 and making payment via Utah TAP. Must be made on or before the LAST DAY of the PTE's taxable year (i.e., Dec 31 for calendar-year filers). | ABE election made by checking the ABE box on a timely-filed Form 41S (S corp) or Form 65 (partnership). Tax due by 15th day of the 4th month after close of tax year (April 15 for calendar-year filers). |
| Rate | 4.50% flat | 5.80% flat |
| Owner credit | non-refundable | refundable |
| Composite interaction | stacks | stacks |
| §199A QBI reduction | Yes | Yes |
| Last verified | 2026-05-12 | 2026-05-11 |
Reference federal-arbitrage computation
Both scenarios assume $1,000,000 qualified net income, a 37% owner federal bracket, and no apportionment. Both reduce §199A QBI base proportionally; net benefit shown is the federal SALT-arbitrage less the rough QBI offset (~20% × bracket × entity tax).
Entity-level tax: $45,000. Net of QBI offset (~$3,330): $13,320.
Entity-level tax: $58,000. Net of QBI offset (~$4,292): $17,168.
Why owners with K-1 income across these two states care
Utah and Idaho interact in three ways that matter to a multi-state K-1 holder: (1) independent elections — each state's PTET is its own election with its own deadline and form, so a missed UT deadline does not affect ID; (2) aggregate federal deduction — the entity-level tax paid to BOTH states is deductible at the federal entity level under IRS Notice 2020-75, so the federal arbitrage compounds; (3) composite-return interaction may differ — see each state's row above.
Run the multi-state picker pre-filled with both jurisdictions: