The Form Said $40,000. Then It Went Silent.
The IRS put out a new W-4 Deductions Worksheet after the One Big Beautiful Bill passed. It has a line for your state and local tax deduction. If your income is under $500,000, the line says you can write up to $40,000.
If your income is above $500,000, the line says nothing. No number. No formula. No redirect.
You are on your own.
The Phaseout Nobody's Stub Shows
Congress raised the SALT cap from $10,000 to $40,000. Good news. But Congress also wrote a phaseout. If your income tops $500,000, the cap starts to shrink. For every dollar above $500,000, you lose thirty cents of that deduction. By the time you hit $600,000, the cap is back down to $10,000. Right where it started.
So. Say you made $500,000 last year. You claimed $40,000 in state and local taxes plus $35,000 in other write-offs. Your taxable income was $425,000.
Now say you made $600,000. You'd expect $100,000 more in taxable income. But the phaseout ate $30,000 of your SALT deduction. Your write-offs dropped to $45,000. Your taxable income jumped to $555,000. That's $130,000 more taxable income from a $100,000 raise.
At the 35% bracket, that's $45,500 in extra tax. On $100,000 of new income. A 45.5% effective rate. Tax pros call it the "SALT torpedo."
Andy Whitehair, a CPA and a director with Baker Tilly's Washington tax council practice, called it:
It's definitely a quirky little phaseout provision. When people start actually crunching numbers, they might be in for some surprises.
I mean. "Surprises."
The Five Questions Everyone Asks About Elon’s New Invention
Answered in plain English, two lines each
Every day my inbox fills with the same five questions about Elon Musk’s new invention. Here they are, answered straight.
1. What did he actually invent?
A radical new form of AI, protected by a freshly filed patent. I call it M.A.G.I.
2. Is this real or hype?
The patent is real, dated, and public. The projection is Musk’s own: a new industry growing more than 7 million percent.
3. Why would I care?
Because even if he is only 10% right, that is enough to grow $100 into more than $700,000.
4. What’s the catch?
Timing. Musk begins scaling production at the end of this month, and windows like this close fast.
5. What do I do with this?
Watch my briefing. It shows the patent, the math, and the little-known supplier Marc Chaikin and I just issued a rare buy alert on. Then decide for yourself.
The sixth question — “why didn’t I look sooner?” — is the only one I cannot answer for you.
The Broken Wire
Here's the part that matters. The W-4 worksheet draws a line at $500,000. Below that line, you write $40,000. Above that line, the worksheet goes blank. No phaseout formula. No adjusted number. No warning that your real cap could be $22,000 or $10,000 depending on where your income lands. The form doesn't tell you the wrong number. It tells you nothing at all.
But surely the IRS online calculator catches this? The Tax Withholding Estimator?
No.
The IRS updated the estimator in March 2026 to handle tips, overtime, and car loan interest. The SALT phaseout? Still broken. The disclaimer on the IRS website, right now, says this:
Your estimate may not be accurate if you claim these credits or deductions affected by the OBBBA: Itemized deductions (37% tax bracket).
Sure. "May not be accurate." That's one way to describe a $45,500 gap.
And the withholding tables themselves? The IRS announced in August 2025 that federal income tax withholding tables would not be updated for the new law in tax year 2025. No changes to Form W-2. No changes to Form 941. Employers keep using the old tables.
So trace the wire. Congress wrote a phaseout. The withholding tables don't model it. The W-4 worksheet doesn't ask about it. The online estimator can't calculate it. Your pay stub doesn't show it.
Every tool between the law and your paycheck has a gap in the same spot. The taxpayer fills out the form the IRS gave them. The form is silent. And nobody upstream flags it.
The Quiet Part on IRS.gov
Look. The IRS told you. They posted the disclaimer on the estimator's own landing page. In small text. Above the start button.
The Tax Withholding Estimator is not yet updated to reflect certain provisions of the One, Big, Beautiful Bill Act.
Translation: we built the law but not the calculator. Good luck.
This is not a conspiracy. It's plumbing. Congress bolted a new pipe onto the system. The meters downstream still read the old flow. The water pressure changed. The gauges didn't.
The Callback
You looked at the worksheet. The worksheet looked away. Payroll ran whatever number you gave it. Your stub looks fine.
The phaseout doesn't care what the form accepted. That $30,000 of vanished deduction is sitting in a quiet room at the IRS, waiting for April.
