Bill Bengen, the creator of the 4% rule, has updated the figure to 4.7%.
Bengen says this is still conservative, and a 5.5% spending rate in retirement is more practical.
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The 4% rule for retirement savings is due for a revamp.
The longstanding concept helps guide retirees on how much they can spend in retirement. Withdraw 4% of a portfolio, and then increase that amount for inflation in the following years. The nest egg should last for 30 years.

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