08/14/2026
Three professionals gave the right answer. 40% marginal rate mistake.
Here's a scenario we see some version of every single year.
A newly retired investor — call her a composite of several situations, not any one person — sits down with her advisor. He looks at her first low-income year and says: "Your income is unusually low right now. You should look at a Roth conversion. But I can't give tax advice — talk to your CPA."
Correct advice. Correctly disclaimed.
She takes it to her CPA. He runs the brackets, subtracts the standard deduction, and says: "Agreed. Let's convert $50,000 and keep you inside the lower bracket."
Also correct. Based on what he was shown.
Conversion made before year end.
Then tax forms arrive, and the 1099s tell a fuller story of what nobody had on their desk...
Her taxable brokerage mutual funds had high turnover and threw off roughly $40,000 in capital gains, dividends and interest. The advisor knew, but limited scope and tools to assess mid year. The CPA didn't ask because she didn't have access to the investments. Neither connected it to the conversion.
Separately, her health insurance agent upon retirement did shopping too and found her a great marketplace plan with an advance premium tax credit. Neither professional was looking at health insurance.
April 15th arrives and the bill comes. $28k. The client asks 28k?!? But I didn’t have any income last year.
The conversion didn't just get taxed. It created a tax bomb. It stacked on top of her 40k investment income, pushing her qualified dividends out of the 0% capital gains bracket, then created state income tax, and then finally pushed her modified AGI past the eligibility threshold for her premium tax credit — which, unlike most tax provisions, doesn't phase out gently. It's a cliff. And the credit she'd received all year for discounted health insurance became a repayment on her return.
Blended together, the true cost of those converted dollars landed near 40 cents on the dollar — for a strategy chosen specifically to be tax-efficient.
Nobody was necessarily “wrong”. But the client still had to pay.
That's the part worth sitting with. This wasn't bad advice. It was good advice delivered in isolation and what we call the true cost of no coordination.
At PWM, this is why when we build the plan, we stay in it — coordinating with your tax professional or our Tax Group not just through the fourth quarter, but take it to the finish line come April 15th. No isolation or partial truths.
If this isolation is something you have felt or seen first hand, you aren't alone.
If you would like a free consultation to see the full picture of your finances, connect with us at pwealthmgmt.com or by emailing our team at [email protected].
*Illustrative and hypothetical. Not tax, legal, or investment advice.*