One big 401(k) withdrawal could push your Medicare premiums from $202.90 to $689.90 a month

When you're retired, you don't just get a paycheck. You must make decisions about withdrawing money from retirement plans to provide yourself with income. Unfortunately, the choices can have far-reaching and sometimes surprising effects.

Let's pretend, for example, that Maryann is 66-years-old and is thinking about taking a large amount out of her 401(k) to do some home renovation projects.

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Unfortunately, Maryann is concerned about the impact this could have on her Medicare premiums, and she's 100% correct to be worried.

The good news is that she may have some options to try to avoid a large withdrawal impacting her Medicare costs. The bad news is that those options are pretty limited and may not work for her. Here's why.

First, it's important to understand why Maryann is worried about the impact of a 401(k) withdrawal on Medicare costs.