Roth vs Traditional IRA Conversion: What Makes Sense?

Tax season often brings a familiar sense of panic about retirement accounts. You might be staring at your screen wondering if you should put money into a Traditional IRA, fund a Roth IRA, or convert existing money from one to the other before the April 15 deadline.

So, which move is right for you? A Roth conversion makes the most sense if you are currently in a lower tax bracket than you expect to be in retirement, while keeping your money in a Traditional IRA is better if your current tax rates are at their peak.

For the last few years, a lot of financial advice pushed people to convert their Traditional IRAs to Roth IRAs as fast as possible. The logic was simple. The tax brackets set by the Tax Cuts and Jobs Act were scheduled to expire at the end of 2025, meaning taxes were likely going up in 2026.

That changed recently. With the passage of the One Big Beautiful Bill Act, those lower tax brackets are now permanent. The 10, 12, 22, 24, 32, 35, and 37 percent federal tax brackets are here to stay unless new laws are passed. Because there is no longer an artificial 2026 deadline forcing your hand, the decision to convert your retirement money requires a much closer look at your personal numbers.

The 2026 Rules for IRA Contributions

Understanding the 2026 IRA contribution limits is the first step in any retirement tax strategy. Before we talk about moving money around, it helps to understand the current limits. The IRS has updated the numbers for the 2026 tax year. You can now contribute a combined total of $7,500 to your Traditional and Roth IRAs if you are under age 50. If you are 50 or older, that limit bumps up to $8,600.

Let's define our terms. A Traditional IRA — a tax-advantaged retirement account that gives you a tax deduction today, but requires you to pay taxes on withdrawals in retirement. Conversely, a Roth IRA — a retirement account that offers no upfront tax break, but allows your money to grow entirely tax-free for retirement.

However, not everyone can contribute to these accounts directly. Your ability to take a deduction for a Traditional IRA depends on your income and whether you have a retirement plan at work. For a single person with a workplace plan in 2026, the deduction phases out completely once your modified adjusted gross income hits $91,000.

Roth IRAs have their own strict income limits. In 2026, single filers cannot contribute directly to a Roth IRA if their income exceeds $168,000. For married couples filing jointly, the cutoff is $252,000.

This is where conversions come in. While there are strict income limits for contributing directly to a Roth IRA, there are absolutely no income limits for converting money from a Traditional IRA to a Roth IRA. If you have been looking for ways to minimize your tax burden, understanding this loophole is essential.

The bottom line: While direct Roth contributions have strict income limits, anyone can execute a Roth conversion regardless of how much they earn.

What Exactly is a Roth Conversion

A Roth conversion allows you to pay taxes on your retirement savings now to secure tax-free withdrawals later. But what is it, exactly? A Roth conversion — the process of taking money out of a pre-tax account (like a Traditional IRA) and moving it into an after-tax account (a Roth IRA).

Because you never paid taxes on the money in your Traditional IRA, the IRS requires you to pay ordinary income tax on the amount you convert in the year you make the move. If you convert $20,000 this year, that $20,000 is added to your taxable income.

Why would anyone volunteer to pay taxes now? The goal is to pay taxes while you are in a lower tax bracket today, rather than paying taxes at a higher rate when you are forced to take withdrawals in the future. Roth IRAs also do not have Required Minimum Distributions (RMDs). With a Traditional IRA, the government forces you to start pulling money out and paying taxes on it at age 73. A Roth IRA lets your money sit and grow tax-free for the rest of your life.

According to the Investment Company Institute (2024), 44 percent of US households own IRAs. Traditional IRAs are the most common, owned by 33 percent of households. Many of these accounts hold funds rolled over from old 401(k)s. If you have one of these accounts, you have a conversion opportunity sitting right in front of you.

Here's what this means: Paying taxes voluntarily today can save you from massive, forced tax bills when you reach age 73.

Finding Your Trough Years for Tax Savings

Executing a conversion during a temporary dip in your income is the most mathematically efficient way to move your money. Financial planners often talk about these periods as trough years. Trough years — the years when your income temporarily drops, placing you in a lower tax bracket.

For many people, trough years happen right after they retire but before they turn 73. During this window, you might not have a salary anymore, and you might not have started claiming Social Security or taking forced IRA withdrawals. Your taxable income is suddenly very low.

This is the perfect time to execute a Roth conversion. You can convert just enough money from your Traditional IRA to fill up the lower tax brackets. For example, the 2026 tax brackets allow a married couple filing jointly to earn up to $100,800 and stay within the 12 percent bracket. If your other income is only $50,000, you could convert $50,000 from your Traditional IRA to a Roth IRA and pay just 12 percent in federal taxes on that conversion.

You can also use market downturns to your advantage. If the stock market drops and your Traditional IRA loses 20 percent of its value, you can convert shares while they are priced low. You pay less in taxes on the conversion, and when the market eventually recovers, all that new growth happens inside the tax-free Roth account.

The bottom line: Timing your conversions during low-income years or market downturns maximizes your tax-free growth potential.

The Pro-Rata Rule and Backdoor Roth Conversions

High earners can use the backdoor Roth strategy, but they must navigate complex IRS aggregation rules first. If you earn too much money to contribute directly to a Roth IRA, you might be considering a strategy called the backdoor Roth. This involves making a non-deductible (after-tax) contribution to a Traditional IRA and then immediately converting it to a Roth IRA. Since you already paid taxes on the money, the conversion itself should be tax-free.

But there is a massive trap here called the pro-rata rule. The pro-rata rule — an IRS regulation that taxes backdoor Roth conversions based on the ratio of pre-tax to after-tax funds across all your IRA accounts.

The IRS does not let you pick and choose which dollars you are converting. If you have other Traditional IRAs, SEP IRAs, or SIMPLE IRAs that contain pre-tax money, the IRS looks at all your accounts combined.

Let's say you have $95,000 of pre-tax money in an old rollover IRA. You decide to make a $5,000 after-tax contribution to a new Traditional IRA, hoping to do a backdoor Roth conversion. The IRS looks at your total IRA balance of $100,000. Because 95 percent of your total balance is pre-tax, 95 percent of your conversion will be taxable. If you convert that $5,000, you will have to pay taxes on $4,750 of it.

If you want to use the backdoor Roth strategy, you need to clear out your pre-tax IRA balances first. Many people do this by rolling their pre-tax IRAs into their current employer's 401(k) plan. Once your Traditional IRA balance is zero, the backdoor Roth works perfectly.

Here's what this means: You must clear out all existing pre-tax IRA balances before attempting a backdoor Roth, or you will face unexpected taxes.

Hidden Costs of Roth Conversions to Watch For

Converting too much money at once can trigger hidden taxes and unexpected surcharges on your retirement benefits. A Roth conversion increases your taxable income for the year, which can trigger a domino effect across your finances.

One of the biggest surprises for older adults is the Medicare Income-Related Monthly Adjustment Amount (IRMAA). IRMAA — a surcharge added to Medicare premiums for retirees with higher taxable incomes. The Social Security Administration looks at your income to determine your Medicare Part B and Part D premiums. In 2026, if your income as a single filer goes over $109,000 (or $218,000 for married couples), you will be hit with a surcharge.

The tricky part is that Medicare looks at your income from two years prior. A large Roth conversion in 2026 could artificially inflate your income and cause your Medicare premiums to spike in 2028.

Higher income from a conversion can also cause more of your Social Security benefits to become taxable. Before you pull the trigger on a massive conversion, you have to run the numbers on these secondary costs. It rarely makes sense to pay a massive tax bill today just to avoid a slightly higher tax bill tomorrow.

The bottom line: Always calculate the secondary costs to your Medicare and Social Security before executing a large Roth conversion.

Average American Retirement Savings Data

Your age and current account balance should dictate whether a conversion strategy is worth your time. When deciding if a conversion is worth the effort, it helps to look at where you stand compared to your peers. According to the Federal Reserve (2024), the average household retirement savings is $333,940, but the median is only $87,000. This means a small number of people have very large accounts pulling the average up, but the typical person has much less.

Age plays a huge factor. The median retirement savings for someone under 35 is $18,880. If you are in this group, your focus should probably be on funding your accounts and investing in basic index funds rather than worrying about complex conversion strategies.

For those aged 55 to 64, the median balance jumps to $185,000. This is the demographic that benefits most from Roth conversions. You have built up a solid balance, you are approaching retirement, and you have a clear view of what your future tax situation might look like.

Still, a lot of people feel behind. Survey data shows that 58 percent of American workers believe their retirement savings are not where they should be. If you are feeling anxious about your progress, make sure you have a solid financial safety net in place before you start paying optional taxes on Roth conversions.

Here's what this means: Younger investors should focus on building balances, while those aged 55 to 64 are in the prime window for conversion strategies.

Navigating the April 15 IRA Deadline

Beating the tax deadline requires acting weeks in advance to avoid custodian errors and IRS penalties. You have until the tax filing deadline (usually April 15) to make your IRA contributions for the previous year. For your 2025 contributions, you have until April 15, 2026.

However, financial custodians get completely overwhelmed in the first two weeks of April. Fidelity Investments reported that nearly three-quarters of people who contribute right at the deadline choose Roth IRAs, which often leads to mistakes with income limits.

If you make a mistake and contribute to a Roth IRA when your income is too high, the IRS hits you with a 6 percent penalty on the excess amount. Worse, that penalty applies every single year the money stays in the account.

To avoid the chaos, you should treat April 1 as your actual deadline. This gives you a two-week buffer to ensure your transfer clears, your custodian records it properly, and you have time to fix any errors.

Also, keep in mind that while you can file an extension for your tax return to get until October 15, that extension does not apply to IRA contributions. Your money must be in the account by the April deadline, no exceptions.

Conversions operate on a slightly different timeline than contributions. A Roth conversion is always reported in the calendar year it actually happens. If you convert money in February 2026, that conversion goes on your 2026 tax return, even if you are doing it at the same time you make a 2025 prior-year contribution. Keep your paperwork clean and always double-check which tax year your custodian is applying your moves to.

The bottom line: Treat April 1 as your hard deadline for prior-year contributions, but remember that conversions are always taxed in the calendar year they occur.

Common Questions About IRA Conversions

What is the deadline for a Roth IRA conversion?

The deadline for a Roth IRA conversion is December 31 of the calendar year you want the conversion to be taxed in. Unlike IRA contributions, which can be made until April 15 of the following year, conversions do not have a tax-filing extension grace period.

How much money can I convert to a Roth IRA each year?

There is no limit on how much money you can convert from a Traditional IRA to a Roth IRA in a single year. However, because the converted amount is added to your taxable income, it is usually best to convert smaller amounts over several years to avoid jumping into a higher tax bracket.

Why do I have to pay taxes on a Roth conversion?

You have to pay taxes on a Roth conversion because the money in your Traditional IRA was originally contributed on a pre-tax basis. Since you received a tax deduction when the money went in, the IRS requires you to pay ordinary income tax when moving it to a tax-free Roth account.

When does a backdoor Roth conversion make sense?

A backdoor Roth conversion makes sense when your income exceeds the IRS limits for direct Roth IRA contributions. It is highly effective for high earners, provided they do not have other pre-tax IRA balances that would trigger the pro-rata rule.

Your One Next Step

Pull up your most recent tax return and find your taxable income. Compare that number to the 2026 federal tax brackets to see exactly how much room you have left in your current bracket. If you have a Traditional IRA and you are sitting comfortably in the 12 or 22 percent bracket, calculate how much you could convert to a Roth IRA without bumping into the next tax tier. Knowing your exact margin is the only way to make a conversion work on your terms.