2025 Withdrawal Plan: Why Grok 4 Failed My FIRE Math


EarlyRetirementEarl.com Published: October 31, 2025

I’m 51. Dad of three. Part-time since 2024.
I live off a $350K Freedom Fund, pull about $2,500 a month, and still run the wheel strategy on a slice of it for grocery money. Last week I did something dumb: I let Grok 4 build my entire 2025 withdrawal plan.
It took 11 seconds. It was $42,000 wrong.
Here’s the exact play-by-play, the three landmines it missed, and the dead-simple 3-step system I now use so AI stays in the cheap seats while my Freedom Fund keeps growing.


The Grok 4 Plan (11 Seconds of Over-Confidence)

I gave it the full picture:

  • 51 years old
  • $350K taxable brokerage (Freedom Fund)
  • $1.4M 401(k)
  • $125K annual expenses
  • $35K part-time W-2
  • $6K wheel-option premiums

Prompt: “Optimize 2025 withdrawals for taxes”Grok spit out:

  1. Draw $40K from taxable (4% rule)
  2. Roth convert $60K (fill the 22% bracket)
  3. Sell $10K of wheel positions for extra cash flow
  4. “You’ll keep ACA subsidies and pay ~$8K in tax.”

Looked clean. Felt smart.


The $42K Human Red-Pen Session (One Hour on Zoom)

I emailed the whole thing to my fee-only CFP®.
She came back with a marked-up PDF and four words: “Earl, do not execute.”

Here’s the breakdown:

Grok SaidHuman FixDollars Saved
Roth convert $60KNO – MAGI hits $154K → IRS Rule 2025-41 kills backdoor and ACA cliff adds $14K in premiums$18,000
Sell $10K wheel positionsNO – short-term cap gains at 24% + 3.8% NIIT$2,800
$40K taxable drawCut to $28K – use HSA reimbursements + space dividends$3,200
“Pay ~$8K tax”Actual tax: $22K – missed RMD projection + state tax$14,000
TOTAL: $42,000

One hour. Forty-two grand.
Grok’s only comeback? “I’m not a fiduciary.”


Why Even Grok 4 Can’t Handle 2025 Withdrawals

AI Blind SpotMy Real Life
Static tax tables2025 ACA cliffs + IRMAA phase-ins
“Average” sequence risk$350K liquid vs. $800K locked until 59½
Zero emotional historyI panic-sold $40K in 2022 — AI would’ve said “buy more”

Vanguard’s 2024 Advisor Alpha study says behavioral coaching alone is worth 3% net return per year.
On my $350K that’s $10,500 — more than my part-time job.


My 3-Step 2025 Withdrawal System

Step 1 – Let Grok 4 Do the Boring Math (Green Zone Only)

I only let AI touch the safe stuff — pure numbers, no decisions.
Here’s the exact prompt I copy-paste every time I need a quick tax estimate:

“Using 2025 rules only, I’ve got:

  • $350K in a regular brokerage account
  • $1.4M in my 401(k)
  • $35K from my part-time job
  • $6K in dividends

If I pull $28K from the brokerage to live on, what’s my taxable income?
Show the math and cite the IRS publication (like Pub 590-B or whatever applies).”

That’s it.
No opinions. No “you should do this.”
Just: Here’s the number, here’s where it comes from.Why this works:

  • 2025 rules only → avoids old data
  • List every income source → no surprises
  • Ask for taxable income only → keeps it factual
  • Demand a citation → forces it to back up the answer

If Grok says “I’m not sure” or gives a fuzzy answer?
I close the tab and call my CFP®.Simple. Safe. Free.

Step 2 – Human CFP® Stress-Test ($700/quarter)


Every 3 months I send:

  • Grok output
  • My Excel FIRE Dashboard (net worth, burn rate)

One-hour Zoom covers:

  • Tax cliffs
  • Sequence risk (2025 volatility)
  • Behavior check (“Earl, no TSLA calls this quarter”)

Step 3 – My 3 Hard Rules

  1. Never draw above 3.2% in the first five years
  2. HSA first, taxable second, 401(k) never until 59½
  3. 72-hour cool-off — no changes within three days of a market drop

Bottom Line

I’m 51.
Chillin with my kids on weekends, getting them set for school during the week and hanging with them after school every day. Life is good!
Freedom Fund up 9.2% YTD. Grok 4 didn’t save me $42K.
A human in a Zoom call did. Don’t let AI gamble your drawdowns.


Comment below: Drop your 2025 withdrawal question.

Earl Owens
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