Maine business owners, this one's been a long time coming.
After years of advocacy from the Maine CPA community and business organizations, Governor Janet Mills' supplemental budget proposal includes a Pass-Through Entity Tax (PTET) for Maine, which would be effective for tax years beginning January 1, 2026. If enacted, partnerships and S corporations will finally have access to a federal tax planning strategy that businesses in 36 other states have been using for years. Maine has been late to the party, but the party has started!
Why the pass-through entity tax matters to Maine businesses
Here's the backstory. The 2017 Tax Cuts and Jobs Act capped the federal deduction for state and local taxes (SALT) at $10,000 per year for individual taxpayers. For many business owners, that cap wiped out a meaningful federal deduction on income that was already being taxed at the state level. C-corporations never had this problem, as they've always been able to deduct state income taxes in full at the entity level. The PTET would level the playing field by shifting the tax obligation from the individual to the entity, where it can be deducted without hitting the SALT cap.
OBBBA impact on the pass-through entity tax
When the One Big Beautiful Bill Act (OBBBA) was signed on July 4, 2025, it changed the math again. The OBBBA temporarily raised the individual SALT cap from $10,000 to $40,000 for tax years 2025 through 2029. Good news, right? For many business owners, the answer was “yes.” But the headline number doesn't tell the whole story.
The expanded cap phases out aggressively for higher earners. If your modified adjusted gross income exceeds $500,000, that $40,000 cap starts shrinking; if your income is above $600,000, you're effectively back to $10,000. For Maine's most successful pass-through entity owners, the expanded SALT cap may provide little or no individual relief. For that group, the PTET remains the more powerful tool.
For owners in the $300,000 to $500,000 range, the analysis is more nuanced. The expanded cap may partially cover your deduction needs, but when you add up property taxes, state income taxes, and other SALT items, the entity-level election often still makes sense—especially when you can potentially stack the full PTET deduction at the entity level on top of up to $40,000 of personal SALT items.
How Maine's PTET works
The election is made annually on a timely-filed Maine return and is irrevocable once the filing deadline passes. The tax is calculated on the entity's aggregate Maine-source income—grossed up for the PTE tax itself—at Maine's highest individual marginal rate of 7.15%. Members then receive a 90% refundable credit against their individual Maine income tax for their share of what the entity paid.
That 90% matters. Maine is joining Massachusetts and a handful of other states that offer less than a full 100% credit, which means there's a built-in 10% cost to the election. In most cases, the federal benefit will outweigh that haircut—but it requires analysis. This isn't a one-size-fits-all recommendation.
What if your business has nonresident members?
If your entity has nonresident members, there's an additional wrinkle: the electing PTE must pay estimated tax equal to 10% of the PTE tax allocated to each nonresident member, due within 30 days of the entity return's due date. The upside: Nonresident members whose only Maine-source income flows through electing PTEs may be able to skip filing a Maine individual return entirely if their credits cover the liability.
The bottom line: A win for Maine businesses
For high-income pass-through entity owners—especially those above the $500,000 MAGI threshold—the PTET election is likely the primary tool for capturing federal tax relief. For owners in the middle-income ranges, the interaction between the expanded personal SALT cap and the entity-level election needs careful modeling. And for everyone, that 10% non-refundable component means that a thoughtful calculation is needed before a decision is made.
This is a real win for Maine's business community—assuming it crosses the finish line. If you own a partnership or S corporation with Maine operations, now is the time to start the conversation so you're ready to move when it does. The election is annual, irrevocable once the deadline passes, and the first necessary actions will be approaching fast.
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