Roth Conversion and Roth Strategy

Key Takeaways

• Roth strategies can serve different purposes. Roth conversions, Roth 401(k) contributions, Backdoor Roth IRAs, and Mega Backdoor Roth strategies can each help build tax-advantaged retirement savings, depending on your income, tax situation, and retirement timeline.
• A Roth conversion means paying taxes now for potential tax-free withdrawals later. The strategy may be particularly useful during lower-income years or when you expect your future tax rate to be higher.
• Roth planning is about creating flexibility. The right combination of Roth and traditional assets can give you more control over taxes, withdrawals, and retirement income later.

What Is a Roth Strategy?

Roth planning is broader than simply deciding whether to contribute to a Roth IRA. Depending on your circumstances, you may have several ways to build Roth assets, including Roth IRA and Roth 401(k) contributions, Roth conversions, Backdoor Roth contributions, and Mega Backdoor Roth strategies.

These approaches work differently. Some involve contributing new money to a Roth account, while others involve moving existing pre-tax retirement savings into a Roth account and paying taxes on the amount converted.

Which options make sense depends on your income, tax situation, retirement timeline, and the features available through your retirement accounts.

How Does a Roth Conversion Work?

A Roth conversion moves money from a traditional IRA or another eligible pre-tax retirement account into a Roth IRA. The amount converted is generally included in your taxable income for the year of the conversion.

The basic trade-off is straightforward: you pay taxes on the money you convert today in exchange for the potential for tax-free qualified withdrawals from the Roth account later.

A conversion doesn’t have to be an all-or-nothing decision. You can convert a portion of your traditional retirement savings and leave the rest in the original account. That can be useful when you want to build Roth assets without creating an unnecessarily large tax bill in a single year.

Why Consider a Roth Conversion?

One common opportunity occurs after someone retires but before they begin taking Social Security or required minimum distributions. Income may temporarily fall during this period, potentially creating room for Roth conversions at lower tax rates.

A conversion may also reduce the amount held in traditional retirement accounts, which can help manage future required minimum distributions. For some people, Roth assets can also provide additional flexibility in retirement because qualified withdrawals generally aren’t included in taxable income.

That doesn’t mean everyone should convert as much as possible. The value of a conversion depends on what you pay in taxes today compared with what you might otherwise pay in the future.

Should You Convert to a Roth Before Retirement?

You don’t have to wait until retirement to consider a Roth conversion. In fact, the years leading up to and immediately following retirement can be worth looking at closely because your income may change significantly.

For someone still earning a high salary, a large conversion could add substantial taxable income on top of their wages. After retirement, however, there may be a period before Social Security and required minimum distributions begin when taxable income is relatively lower. That window can create an opportunity to convert some traditional retirement assets.

The key is to look at several years together rather than deciding whether a conversion makes sense based on one year’s tax return. A series of smaller conversions may produce a different result than one large conversion.

When Does a Roth Conversion Make Sense?

The answer depends largely on what your tax picture looks like now compared with what you expect it to look like later.

A conversion may be worth considering if you’re in a temporarily lower tax bracket, expect significant future RMDs, or want more tax diversification in retirement. It can also be useful during a gap between retirement and the start of Social Security or other income.

On the other hand, converting may be less attractive if you’re currently in a high tax bracket and expect substantially lower income later. The tax cost also matters. If you need to use retirement assets to pay the conversion tax, the benefits may be different than if you can pay the tax from cash or other taxable assets.

Medicare premiums, Social Security taxation, and state income taxes can also affect the overall cost, so the conversion should be evaluated as part of your broader tax picture.

How Much Should You Convert?

A Roth conversion doesn’t have to fill your entire IRA or traditional retirement account. One common approach is to convert an amount that keeps you within a targeted tax bracket, then reassess the strategy the following year.

For example, someone might convert enough to use part of an available tax bracket without pushing additional income into a significantly higher one. The right amount depends on other taxable income, retirement account balances, expected future income, and how much cash is available to pay the conversion tax.

Looking at conversions over several years can also make the strategy more flexible. Instead of trying to predict the perfect time to convert, you can revisit the decision each year as your income, investments, tax laws, and retirement plans change.

Roth 401(k) vs. Traditional 401(k)

A Roth 401(k) and traditional 401(k) allow you to save for retirement, but they provide the tax benefit at different times.

	Traditional 401(k)	Roth 401(k)
Contributions	Generally pre-tax	After-tax
Tax benefit	Potential tax deduction today	Potential tax-free qualified withdrawals later
Withdrawals	Generally taxable	Qualified withdrawals generally tax-free
RMDs	Generally subject to RMD rules	No RMDs for the original owner under current law

A Roth 401(k) can be attractive if you believe your tax rate could be higher later or if you want to build a mix of taxable and tax-free retirement assets.

A traditional 401(k), meanwhile, can be valuable when the current tax deduction is particularly useful.

You don’t necessarily have to choose one exclusively. Using both can create tax diversification, giving you more options when you begin taking retirement income.

What Is a Mega Backdoor Roth?

A Mega Backdoor Roth is a strategy that lets eligible employees contribute substantially more to Roth accounts than standard Roth IRA contribution limits allow.

The strategy generally involves making after-tax contributions to a qualifying 401(k) and then moving those contributions into a Roth account through an in-plan conversion or distribution to a Roth IRA.

The important word is eligible. Not every employer plan allows the features needed to use a Mega Backdoor Roth.

Who Might Benefit From a Mega Backdoor Roth?

This strategy is most relevant to higher-income employees who are already maximizing their regular retirement contributions and have access to a plan that allows the necessary after-tax contributions and Roth conversion features.

Before using the strategy, review your employer’s plan rules rather than assuming every 401(k) offers the same options.

Backdoor Roth vs. Mega Backdoor Roth

These two strategies are sometimes confused, but they use different accounts and offer different contribution opportunities.

	Backdoor Roth IRA	Mega Backdoor Roth
Where it happens	IRA	Employer 401(k)
Employer plan required	No	Yes
Typically useful for	Higher-income individuals who can’t contribute directly to a Roth IRA	Higher earners with qualifying employer plans
Contribution potential	Subject to IRA limits	Potentially much higher
Plan-dependent	No	Yes

Someone who qualifies for both strategies may potentially use both, although the appropriate approach depends on their overall tax and retirement plan.

SECURE Act 2.0 and Roth Catch-Up Contributions

SECURE Act 2.0 also changed the way certain catch-up contributions are handled for higher-paid employees.

Beginning with the applicable implementation rules, certain employees whose prior-year wages from their employer exceed the applicable threshold will generally have to make catch-up contributions as Roth contributions rather than pre-tax contributions.

Because the income threshold is subject to indexing and the rules have evolved since SECURE Act 2.0 was passed, it’s important to use the current IRS rules when determining how the requirement applies to you.

For higher earners, this is another reason to understand the Roth options available through your employer’s retirement plan.

Roth Conversion vs. Roth 401(k) vs. Mega Backdoor Roth

These strategies can all increase your Roth assets, but they’re solving different problems.

Strategy	How it works	Best suited for
Roth conversion	Moves existing pre-tax retirement money into a Roth account	Investors looking to manage current and future taxes
Roth 401(k)	Makes after-tax contributions directly to an employer plan	Employees who want Roth savings through their workplace plan
Backdoor Roth IRA	Uses a traditional IRA contribution followed by a Roth conversion	Higher earners who can’t contribute directly to a Roth IRA
Mega Backdoor Roth	Uses eligible after-tax 401(k) contributions and Roth conversion features	High earners with qualifying employer plans

The important question isn’t which strategy is universally best. It’s which options are available to you and how they fit with the rest of your financial plan.

How Roth Strategies Affect Your Taxes

A Roth decision can affect more than the tax due on the contribution or conversion itself.

For example, a large Roth conversion can increase modified adjusted gross income and potentially affect Medicare premiums or the taxation of Social Security benefits. State income taxes can also change the cost of converting.

That is why comparing the immediate tax cost with the potential long-term benefit matters. A strategy that saves the most in taxes this year isn’t necessarily the one that produces the best result over the course of retirement.

How Do You Choose the Right Roth Strategy?

The right Roth strategy depends on where you are now and what you expect your financial picture to look like later. Someone in their 30s with decades until retirement may approach Roth contributions very differently from someone approaching retirement with a large traditional IRA.

Your employer’s plan, income, tax bracket, and existing retirement accounts can also open or close certain opportunities.

Likewise, a high-income employee with a generous 401(k) plan may have opportunities unavailable to a business owner or someone whose employer plan has limited features.

When evaluating your options, look at the entire picture:

Consideration	Why it matters
Current tax bracket	Determines the immediate tax cost of certain Roth strategies
Expected future tax rate	Helps determine whether paying taxes now may be worthwhile
Income	Can affect eligibility and tax thresholds
Retirement timeline	Determines how long Roth assets may have to grow
Traditional IRA balance	Affects potential future RMDs and conversion opportunities
Employer plan	Determines whether Roth 401(k) or Mega Backdoor Roth strategies are available
Medicare	Higher income can affect future Medicare premiums
State taxes	State income tax can change the cost of a conversion
Cash available for taxes	Paying conversion taxes from outside assets can affect the outcome
Estate goals	Roth assets can provide different tax characteristics for heirs

Roth Strategy FAQs

1. What is a Roth conversion?

A Roth conversion moves money from a traditional retirement account into a Roth IRA. The converted amount is generally taxable in the year of conversion.

2. When does a Roth conversion make sense?

It may make sense when you’re in a lower tax bracket, expect higher tax rates or larger taxable distributions later, or want more tax diversification in retirement. The years before and after retirement can be particularly useful to evaluate because your income may change significantly.

3. Is a Roth 401(k) better than a traditional 401(k)?

Neither is automatically better. A Roth 401(k) can provide tax-free qualified withdrawals later, while traditional contributions generally provide a tax benefit today.

4. What is a Mega Backdoor Roth?

A Mega Backdoor Roth lets eligible employees make additional after-tax 401(k) contributions and move those funds into a Roth account.

5. Can high earners use Roth strategies?

Yes. Higher earners may have access to strategies such as Roth 401(k) contributions, Backdoor Roth IRAs, Mega Backdoor Roth contributions, and Roth conversions.

6. How much should I convert to a Roth each year?

There is no universal amount. Some people convert enough to fill a targeted tax bracket, while others may convert more or less depending on their income and long-term tax outlook.

Build a Roth Strategy That Fits Your Financial Plan

The goal of Roth planning isn’t to put as much money as possible into Roth accounts. It’s to determine where Roth assets can provide the most value within your overall financial plan.

That might mean contributing to a Roth 401(k), using a Mega Backdoor Roth through your employer plan, or gradually converting traditional retirement assets during lower-income years. In some cases, keeping more money in traditional accounts may make more sense.

The right mix depends on your tax situation today, what you expect to need in retirement, and how much control you want over taxable income in the future.

Reach out to schedule a pressure-free call.

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Material prepared herein has been created for informational purposes only and should not be considered investment or tax advice. Federal tax laws are subject to change, and taxpayers are responsible for verifying their obligations with a qualified professional. Perspective 6 Wealth Advisors is an investment advisory team representative with Savvy Advisors, Inc., an investment advisor registered with the SEC. Perspective 6 Wealth Advisors is used as a marketing name only and is not separately registered.