I ran my own 401(k) fee disclosure through AI last week. What it found actually made me angry.
Here’s the part nobody mentioned when you signed up: A slice of your retirement gets skimmed every single year. No bill. No notification. No line on your statement that says “we took this.” Just money quietly walking out the back door.
41% of Americans don’t know their 401(k) charges fees at all. The ones who do? Most have no clue what they’re paying. You know you don’t.
💸 Math that stings
Invest $100,000 at a 7% return. Pay 0.5% in fees, and after 30 years, you have $661,000. Pay 1.5%, and you end up with $498,000. That’s $163,000. Gone. Not to you. Not to your retirement. Straight into somebody else’s pocket.
Three fees are pulling from your account right now. Expense ratios (what the fund charges to exist), admin fees (what the plan charges to function) and service fees (they ding you when you take a loan or move money). All three come off the top before the number ever hits your screen.
The average small plan runs about 1.08% a year. The tiniest plans? 3.56%. You’ve been paying somewhere in there for years without knowing it had a name.
Here’s the trap: target date funds. Some of those “set it and forget it” options (like a 2045 retirement fund) charge three to five times more than the plain index funds inside them. You’re paying extra for the convenience of not picking. Convenience has a price. So does not reading.
🔍 The 5-minute fix
Log into your 401(k) portal. Fidelity, Empower, Vanguard, Principal, whoever it is. Search “fee disclosure.” Your employer is legally required to send you a 404(a)(5) every year. Most people recycle it. Now you won’t.
Then drop that disclosure into ChatGPT, Claude, Gemini or Grok and paste this exact prompt:
You are a no-nonsense retirement plan analyst. I’m uploading my 401(k) fee disclosure. Tell me: (1) my total annual fees as a percent, (2) any fund charging over 0.5%, (3) whether my target date fund costs more than the index funds inside it and (4) the one change that would save me the most money. Plain English. No jargon.
I tested this myself with mine. AI read 50 pages and had my answer in under a minute. One FYI before you upload: Black out your employer name and account numbers. Those docs carry sensitive plan info you don’t want floating around.
What you’re looking for: any fund over 1% is a red flag.
For a basic S&P 500 index fund, you shouldn’t pay more than 0.10%. Vanguard recently cut its average to 0.06%. So if a fund in your plan charges 1.5%? You’re paying 25 times what a Vanguard investor pays for the same market. Same companies. Same returns. Twenty-five times the price. Let that one sit.
Find the cheapest index fund in your plan and compare. The math is the decision.
Your 401(k) just got audited by AI. Fee-nally.
📩 Send this to someone who has a 401(k) and has never looked at the fees inside it. Use the brilliant links below.