You may be making a big mistake with your Roth conversion, this expert says

Deciding whether to do a Roth conversion involves a complicated math equation, but calculators might not give you the right answer. – Getty Images When it comes to making decisions about whether or not to convert pretax IRA or 401(k) savings to Roth — paying the tax now or waiting until later — a lot…


You may be making a big mistake with your Roth conversion, this expert says
Deciding whether to do a Roth conversion involves a complicated math equation, but calculators might not give you the right answer.
Deciding whether to do a Roth conversion involves a complicated math equation, but calculators might not give you the right answer. – Getty Images

When it comes to making decisions about whether or not to convert pretax IRA or 401(k) savings to Roth — paying the tax now or waiting until later — a lot of people get caught up in the math.

They turn to financial-planning software, either through professional planners or via one of the few programs available to do-it-yourselfers with subscriptions, like Boldin or ProjectionLab. The Roth conversion calculators in these financial-planning programs are designed to model and quantify the analysis to tell you whether you will end up paying more tax now or more tax later.

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“It’s going to be wrong,” said Andy Panko, a certified financial planner and educator who blogs, podcasts and runs a popular Facebook group through his platform Retirement Planning Education.

This is the surprising message Panko recently gave to a group of advisers gathered for a professional conference as he walked them through the latest strategies for helping clients figure out retirement income strategies. Roth conversions are a huge topic among retirees facing required minimum distributions at age 73, but they may be too hot a topic. “It’s the industry’s fault for being too vocal, for beating the drum on Roth conversions. Consumers are just bombarded with conversion, conversion, conversion,” Panko said. “Doing a Roth conversion won’t magically make your plan work, so don’t lose sleep on it.”

The problem with calculations projecting the value of Roth conversions is that they rely a lot of assumptions, like future tax rates, inflation and portfolio growth. They even delve into the order and timing of the deaths of the clients, which is particularly tricky when it involves a married couple.

For the bottom line, you usually get a number that is the estimated tax difference between converting and not converting. It might say something like, if you convert a $1 million IRA or 401(k) in $100,000 increments over 10 years, you’ll end up saving $400,000 in taxes over a long span of time. Or you may find that not converting saves you a similar amount of money by continuing to defer taxes (but ends up hitting your heirs when they have to convert the balance they inherit within the 10 years after your death).

Whatever that number is, it’s based on too many assumptions to be actionable, Panko said.

“It does provide some context and provide some directionality, or a sense of magnitude,” he added. “But do not rely on software using 30-year projections that says it will save you some amount of dollars over time. Don’t rely on it too blindly and speak of these reports as certainty or fact.”

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