529 deduction: YesTax parity: Yes — any state's plan
What tax parity means
Most states that offer a 529 tax break only give it for their own in-state plan. Montana is different: as a tax-parity state, you can contribute to the best 529 plan in the country — wherever it's based — and still claim the Montana state income-tax deduction. That lets you shop on investment options and fees without giving up the tax benefit.
The deduction
The deduction has an annual per-beneficiary limit that changes yearly — confirm the current figure with the Montana plan.
How it fits with the gift-tax rules
A 529 contribution is also a gift for federal purposes, so it counts toward the $19,000 annual exclusion (2026). The 5-year election ("superfunding") lets you front-load up to $95,000 per donor per child without using any lifetime exemption.
See how much you can front-load with the 529 Superfunding Calculator, and keep family contributions within the exclusion with the Gift Tax Calculator.
Other tax-parity states
These states also let you deduct contributions to any state's 529 plan:
Arizona · Arkansas · Kansas · Maine · Minnesota · Missouri · Ohio · Pennsylvania
General information, not tax advice. 529 deduction rules and limits change yearly and this page may not reflect the latest figure — confirm with the Montana plan and your CPA. Montana offers tax parity as of recent guidance.
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