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What a Roth conversion is
A Roth conversion is the act of transferring money from a pre-tax account, such as a traditional IRA or an old 401(k), into a Roth IRA. Because traditional accounts were never taxed, you pay income tax on the amount you convert in the year you do it.
In return, that money then grows inside the Roth, where qualified withdrawals later in retirement can come out completely tax-free.
Why people do it
The main appeal is future tax-free income. By paying tax now, you remove the tax on all the growth that follows. A Roth conversion can also reduce future required minimum distributions, since Roth IRAs have none for the original owner, and it can help with estate planning.
People who expect to be in a higher tax bracket later sometimes convert to lock in today's lower rate.
The tax consequences
The catch is the tax bill today. The amount you convert is added to your taxable income for the year, which can push part of your income into a higher bracket if you convert a large sum at once. Some people convert gradually over several years to manage this.
It is generally best to pay the resulting tax from other savings rather than from the converted money, so the full amount keeps growing inside the Roth.
💡 Mind the bracket:A large conversion can lift your taxable income into a higher bracket for that year. Spreading conversions across several years can keep the tax hit more manageable.
When it can make sense
Roth conversions often look most attractive in lower-income years, such as early retirement before pensions or required distributions begin, or a year between jobs, when your tax rate is temporarily low. They can also appeal if you expect tax rates to rise in the future.
Because the move is permanent and the tax math can be complex, many people run the numbers carefully or consult a tax professional before converting.
Frequently asked questions
What is a Roth conversion?
It is moving money from a pre-tax retirement account, like a traditional IRA or old 401(k), into a Roth IRA. You pay income tax on the converted amount now, and in exchange qualified withdrawals from the Roth can later be tax-free.
Do I pay tax on a Roth conversion?
Yes. The amount you convert is added to your taxable income for that year, because the money was never taxed before. Converting a large sum at once can push part of your income into a higher bracket, so some people convert gradually.
Why would someone do a Roth conversion?
To gain future tax-free income, to reduce required minimum distributions later, to help with estate planning, or to lock in today’s tax rate if they expect higher rates in the future. The benefit is removing tax on all the growth that follows.
When is a Roth conversion a good idea?
It often looks best in lower-income years, such as early retirement or a gap between jobs, when your tax rate is temporarily low, or if you expect tax rates to rise. Because it is permanent and complex, many people consult a tax professional first.
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