Said It Here

How to minimize taxes on a large pre-tax retirement account and RMDs

Large traditional pre-tax balances and required minimum distributions create a heavy tax burden and anxiety about future rates upon retirement. Mixing pre-tax and post-tax money in these accounts also complicates strategies like the backdoor Roth conversion.

Overview
People affected3 accounts across 1 forum
Workarounds found7 items attempted
Community agreement40 total upvotes

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

Found another way around this?

Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.

  1. 1
    Doing Roth conversions to pay taxes gradually
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  2. 2
    Delaying Social Security until age 70 to open up tax space
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  3. 3
    Building cash or CD ladders to live off during early retirement years
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  4. 4
    Consulting a CPA or tax advisor for customized withdrawal strategies
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  5. 5
    Thinking about combining traditional IRAs at Vanguard and using Fidelity to backdoor Roth IRA
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  6. 6
    Rolling all traditional IRA funds into a current employer 401k plan if the plan allows it
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  7. 7
    Splitting withdrawals across calendar years to stay under specific income thresholds
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Tried another approach not listed above?+ Share your workaround ↑

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/personalfinance3 people · September 2026 – October 2026

“I have over 800k sitting in a pre tax 401k. I am going to be retiring in 5-6 years at age 66 or 67. Is there some way to avoid or minimize a large tax burden-especially when RMD's kick in....”source ↗

InitialNo1971 · r/personalfinance · 35 upvotes

“I want to stop paying fees and move to an index fund”source ↗

Hoppingbird · r/personalfinance · 2 upvotes

“I realized I have created some weird mix of pre tax and post tax money iny IRA.”source ↗

Imallvol7 · r/personalfinance · 1 upvotes

“Something about since it's mixed pre tax and post tax I can't do the backdoor now because it's a weird tax situation or is that wrong.”source ↗

Imallvol7 · r/personalfinance · 1 upvotes

“Some things I read made it seem like I couldn't just put in $7k then backdoor Roth it because the account has pretax and post tax money”source ↗

Imallvol7 · r/personalfinance · 1 upvotes

Where this came up

People with this problem also raised