When is the Montana PTET election deadline?

Montana's primary-source deadline pin is pending. See the picker and our deadline calendar for our current best information.

What is the Montana PTET rate?

Graduated rates apply; see the picker.

Is the Montana owner credit refundable?

Montana's PTET owner credit is refundable.

Does Montana PTET affect composite-return filing?

Stacks. See the composite-vs-PTET page for the full matrix.

Montana · MT

Montana Pass-Through Entity Tax (PTET)

Montana's PTET regime is one of the 37+ state workarounds to the federal SALT cap (IRC §164(b)(6)). The election is annual, statute-pinned below, and interacts with composite filing and §199A QBI in state-specific ways.

Statute: [PLACEHOLDER: state DOR cite] — Mont. Code Ann. § 15-30-3312 or equivalent PTE election section not pinned this session.
State DOR portal: https://mtrevenue.gov/taxes/pass-through-entities/pass-through-withholding/
Election deadline: Pending
Election form: Form PTE (Montana Pass-Through Entity Tax Return); Form PT-AGR (Owner Tax Agreement)
Entity-level rate: Graduated
Eligible entities: s-corp, partnership, llc-as-s, llc-as-partnership
Owner credit: refundable
Composite interaction: stacks
§199A QBI base reduction: Yes — Reduces federal flow-through income (Notice 2020-75).
Last verified: 2026-05-11

Source: mtrevenue.gov/taxes/pass-through-entities/pass-through-withholding/. MT PTE manifest is THIN — re-research Pub 18 / Form PTE 2025 to fully pin.

IRC §164(b)(6)Notice 2020-75 IRC §199A

Election walkthrough

Verify eligibility. Montana accepts: s-corp, partnership, llc-as-s, llc-as-partnership.
Check the deadline. Pending pin.
Compute the entity-level tax. Apply the 0.00% rate to qualified net income.
Pay and file. Use Form PTE (Montana Pass-Through Entity Tax Return); Form PT-AGR (Owner Tax Agreement). Quarterly estimates may be required.
Owners claim the state credit. refundable credit on the personal state return.
Verify composite interaction. Composite interaction: stacks. See composite vs PTET.
Run the federal §199A QBI math. PTET reduces the QBI base proportionally; net the federal SALT-arbitrage against the §199A offset.

Montana PTET — common questions

Annual deadline reminder

State PTET law revises annually. Montana's data was last verified on 2026-05-11. Re-confirm with the state DOR primary source before electing or filing. Last full-site review: 2026-05-12.

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Election walkthrough

Verify eligibility. Montana accepts: s-corp, partnership, llc-as-s, llc-as-partnership.

Check the deadline. Pending pin.

Compute the entity-level tax. Apply the 0.00% rate to qualified net income.

Pay and file. Use Form PTE (Montana Pass-Through Entity Tax Return); Form PT-AGR (Owner Tax Agreement). Quarterly estimates may be required.

Owners claim the state credit. refundable credit on the personal state return.

Verify composite interaction. Composite interaction: stacks. See composite vs PTET.

Run the federal §199A QBI math. PTET reduces the QBI base proportionally; net the federal SALT-arbitrage against the §199A offset.

Montana PTET — common questions