The PTET "Set It and Forget It" Era Is Over. Here's What That Costs You.

https://vimeo.com/1165489189

For three years, the California Pass-Through Entity Tax was the easiest call in tax planning. Elect in, pay at the entity level, bypass the $10,000 federal SALT cap. Done. Move on to the next problem.

I had clients who literally stopped thinking about it. "Just do the PTET thing again." And honestly? That was the right move — back then.

It's not anymore.

Between the federal One Big Beautiful Bill Act rewriting the SALT cap rules and California adding a 12.5% penalty for anyone who gets sloppy with their timing, the PTET has gone from a no-brainer to a calculation you need to run fresh every single year. And if you're still treating it like autopilot, you're probably leaving money on the table — or worse, burning it.

The 12.5% Haircut Nobody's Talking About

Here's the change that should scare you: California used to treat the June 15 prepayment as a hard gate. Miss it, and you couldn't elect in at all. Harsh, but at least it was clear.

Now? You can still elect in if you miss the deadline. Sounds like good news. It's not.

If you underpay or miss the June 15 prepayment — which has to be the greater of $1,000 or 50% of last year's elective tax — California permanently reduces your credit by 12.5% of the shortfall. Not a late fee. Not a penalty you can appeal. A haircut on the credit itself that you never get back.

Think about what that means in real dollars. Say your entity owes $200,000 in PTET and you miss the prepayment entirely. That's a $25,000 reduction in your credit. Gone. Because of a cash flow timing issue in June.

This is a liquidity management problem now, not just a tax election. If your business has lumpy revenue — construction, professional services with seasonal billing, anything project-based — you need the June 15 number locked in by April at the latest.

The Federal SALT Cap Is Moving. Every Year.

The other half of this equation is that the SALT cap isn't $10,000 anymore. The OBBB Act bumped it to $40,000 starting in 2025, and it escalates 1% annually:

• 2026: $40,400 (AGI phaseout at $505,000)

• 2027: $40,804 (AGI phaseout at $510,050)

• 2028: $41,212 (AGI phaseout at $515,151)

• 2029: $41,624 (AGI phaseout at $520,302)

Here's where it gets interesting — and where I see advisors getting lazy. If your SALT deduction is now covered by the higher federal cap, the entire reason for the PTET election disappears. You're paying 9.3% at the entity level and dealing with the credit mechanics for... what?

But there's a catch. Those AGI phaseouts are aggressive. The deduction gets clipped by 30% of every dollar over the threshold, and at roughly $606K in AGI for 2026, you're back down to the old $10,000 floor. So the question isn't just "what's my SALT?" — it's "what's my AGI going to be, and where do I land on this phaseout curve?"

If you're a business owner clearing $600K+, the PTET probably still makes sense. If you're in the $400K-$550K range, the math just got genuinely ambiguous, and you need someone running the numbers, not just checking a box.

The Ownership Problem Nobody Models 

I'll be blunt: I've seen PTET elections made for entities where a portion of the ownership doesn't even qualify for the credit. That's not a strategy — that's a donation to Sacramento.

The rules are specific. The credit flows to "qualified taxpayers" — generally individuals, trusts, estates, and certain single-member LLCs owned by individuals. If one of your owners is a corporation or a partnership that doesn't meet the definition, their share of the PTET payment generates zero credit. You've spent real cash on a tax that does nothing for them.

And if you have owners in other states, you've got a whole other layer. PTET rules aren't uniform. What works for California income might create a credit trap or double-taxation issue in another state. I've seen multi-state owners get burned because their advisor modeled PTET in isolation.

You Can't Undo This

One more thing that makes me nervous for business owners who aren't paying attention: the election is irrevocable once you file.

You can't amend in and you can't amend out. If you elect and the OBBB Act's higher SALT cap would have covered you anyway, too bad — you've paid 9.3% at the entity level for no incremental benefit. If you skip the election and your AGI spikes into the phaseout zone, you can't go back and elect in on an amended return.

This means the modeling has to happen before you file. Not in October during extension season. Not "whenever we get to it." Before. The. Return. Goes. In.

The Bottom Line

The PTET isn't dead. For a lot of my clients — S-corps and partnerships with California-source income and owners clearing $600K+ — it's still one of the best tools in the kit.

But it's no longer free. It costs attention, it costs cash flow management, and if you get the June 15 prepayment wrong, it costs 12.5% of your credit with no way to fix it.

The question I'd challenge every business owner to answer before they file: Have you actually run the PTET analysis for this year, with this year's AGI projection, this year's SALT number, and this year's ownership structure? Or are you just doing what you did last year?

Because "just doing what we did last year" is exactly how this workaround stops working.