Your tax return is nearly complete and your tax accountant or the tax filing software you are using informs you that you can still make an IRA contribution for the previous tax year. You remember something you read in the past from a reputable source encouraging IRA contributions as a wise tax move. You have the cash available and elect to make the annual IRA contribution. Seems like a good idea that might save taxes in the future. Furthermore, you repeat the same process in years to follow.
It was all well-intentioned. And this is how a potential tax problem begins. Most married taxpayers with six-figure income who are eligible to participate in an employer-sponsored retirement plan (such as a 401k or 403b) are not permitted to make deductible IRA contributions. The income limits for single filers are even lower (income eligibility figures can be found here). When you make an IRA contribution but are not eligible for a deduction, the funds are treated as an after-tax contribution (also called a non-deductible contribution). The contribution is then deemed to be “IRA basis” and has to be diligently tracked every year thereafter via the IRS Form 8606 to avoid being taxed twice. We’ll explain this in a moment.
As a general rule, we discourage clients from making these non-deductible IRA contributions unless the contribution is specifically intended for a backdoor Roth strategy. The biggest problem with non-deductible IRA contributions (those not intended for a backdoor Roth), as we explain in detail here, is that the contributions usually result in higher taxes – often because the contributions are not tracked properly over the course of decades and get taxed twice or simply because the subsequent gains get taxed at higher rates than they would otherwise be taxed.
But back to basis. If you made non-deductible IRA contributions in the past, you should be tracking the basis each year with the Form 8606 that accompanies your tax return. Each time you make a new non-deductible IRA contribution, you add to the basis. Not diligently tracking this basis results in a costly problem – paying excessive future taxes because of double taxation. Happens all the time. The error of not properly tracking basis can and should be fixed by correcting the Form 8606 dating back to the initial non-deductible IRA contribution. The more non-deductible contributions you have made without proper tracking, the bigger the adverse tax problem you will face – if not corrected.
Assume now that you are properly tracking this basis. This means that some portion of your retirement account balance will not be subject to taxation when eventually distributed. Consider the following example to help understand how this works:
Example 1a: Jill made non-deductible IRA contributions for each of the past six years (2015-2020) because her income and participation in a workplace 401k prohibited her from making deductible IRA contributions. In total, her non-deductible IRA contributions equal $34,000 ($5,500 limit for 2015-2018, $6,000 for 2019-2020). This $34,000 is Jill’s IRA basis.
Jill had a pre-existing IRA balance before 2015 (funded entirely with deductible contributions). The 2015-2020 non-deductible contributions combined with the pre-existing balance and subsequent growth brings the total current value of her IRA to $207,000. This means that 16.43% of her IRA ($34,000 / $207,000) has already been subjected to taxes and will avoid taxes in the future. The remaining 83.57% is subject to future taxes. Each dollar that comes out gets taxed based on these percentages. If Jill were to distribute $100 right now, $83.57 would flow through to her tax return as income subject to taxation. Had she not kept track of the basis, she would pay taxes on the entire $100 distribution.
What if Jill wants to do a partial Roth conversion for $34,000? The same math applies – 83.47% of the amount she converts will be subject to taxation ($28,415 of the $34,000). The basis is considered cream in the coffee. Once the cream gets mixed with the coffee, any distributions are pro rata distributions for tax purposes.
There is, however, a widely neglected or unknown workaround that allows for separating the cream and the coffee. This workaround – if properly executed – allows Jill to convert the full $34,000 and use only basis in the conversion. As a result, none of the $34,000 conversion is taxable and she has converted all $34,000 of basis to her Roth without triggering any taxes. This is a big opportunity for anyone with IRA basis.
The strategy only works if Jill participates in a 401k that accepts rollover contributions (the good news is that most 401k plans allow for inbound rollovers). The reason it works is that 401k plans are prohibited from accepting basis with rollover contributions. The IRS specifically disallows basis on these IRA to 401k rollovers such that a rollover must consist entirely of pre-tax dollars. As a result, someone in Jill’s situation is actually able to isolate the basis. Continuing the example:
Example 1b: Jill desires to convert the $34,000 of basis in her IRA to her Roth IRA but learns that doing so will result in 83.47% of the distribution being taxable. Her tax advisor informs her that because she participates in a workplace 401k plan that accepts rollover contributions, she can rollover $173,000 from her IRA to her 401k ($207,000 less the $34,000 basis). Because the 401k is not permitted to accept basis, the entire $173,000 rollover comes from pre-tax IRA dollars which then isolates the remaining $34,000 in her IRA as 100% basis. A few days after rolling the $173,000 to her 401k, she converts the $34,000 remaining in her IRA to a Roth IRA. Because the IRA consisted entirely of after-tax basis, the conversion results in zero taxable income and zero tax cost.
While this works beautifully for Jill, what happens for someone in the same situation without access to a 401k that accepts rollovers? Consider the following example:
Example 2a: Michael retired several years ago from his job as an actuary and has a large IRA worth $2,000,000. He diligently tracked his after-tax IRA contributions and has basis of $90,000 within the IRA that gets reported each year on his Form 8606. He would like to separate the basis dollars for a tax-free Roth conversion but does not participate in a workplace 401k plan that would allow him to take advantage of this Roth conversion strategy.
Once or twice a year, Michael gets paid a small fee to speak at actuarial conferences – usually a few hundred dollars. His financial planner suggests that Michael establish an EIN (business tax ID) at no cost and open an individual 401k (also no cost) to save some of the income from his speaking engagements. While the tax deferral benefit will be minimal as Michael earned just $650 from one engagement this year, the individual 401k will provide an opportunity for Michael to isolate the basis from his IRA. Michael opens the individual 401k as advised and then converts $1,910,000 from his existing IRA to the new 401k. This leaves $90,000 remaining in his IRA which is 100% after-tax basis. Immediately thereafter, Michael converts the remaining $90,000 IRA to a Roth IRA at zero cost.
Granted, most retirees may not have speaking engagements once they retire. But the opportunity to use the same strategy as Michael is far-reaching. The reality is that all it takes to establish an EIN is to get paid $15 to watch the neighbor’s dog for a day. Or sew a few facemasks and sell them on Etsy. Or organize a buddies’ golf trip and collect a few dollars from each participant as an organization fee. There are countless possibilities to earn a few dollars and legitimately use the “job” as a way to establish an individual 401k for the basis conversion workaround strategy. Moreover, you don’t have to wait until retirement to start a side job that allows for legitimately opening an individual 401k.
Notably, there is one final important caveat to this strategy that, if ignored, could destroy the entire design. For the strategy to work effectively, neither Jill nor Michael from the prior examples should rollover any funds from their 401k plans back to a Traditional IRA until at least the next calendar year. Doing so would cause any funds rolled back to the IRA to be included in the calculation of the Roth conversion taxable amount, even though it was rolled over back to an IRA after the conversion. The following extension of Michael’s example explains:
Example 2b: Continuing from Michael’s example above, assume that he converts the $90,000 IRA to a Roth IRA in June and decides immediately thereafter that he has no more use for the individual 401k and does not want to be bothered with it. Two months later – In August – he rolls over the $1,910,000 from the Individual 401k back to a new IRA and closes down the Individual 401k. By rolling these funds back to an IRA in the same calendar year, the taxable portion of his $90,000 Roth conversion now has to proportionately incorporate the $1,910,000 on the Form 8606. That is – the after-tax portion of the $90,000 Roth conversion that he thought was successfully achieved without any tax impact is no longer 100% ($90,000/$90,000). Instead, the after-tax portion is now only 4.5% ($90,000/$2,000,000). As a result of this miscue, Michael will have to report $85,950 of taxable income on the conversion.
Closing Comments
This may all sound really wonky and of limited impact. It may be wonky but it is not of limited impact. We find that roughly half of the prospective clients we speak with have made non-deductible IRA contributions in the past. Generally speaking, they made IRA contributions when they were earning lower incomes and eligible to deduct the contributions and then continued to make contributions after their income started to exceed the deductibility thresholds. Some are properly accounting for this basis each year while others have lost track of the basis.
In all of these scenarios, the basis isolation approach should be immediately considered because the sooner the basis is isolated and converted to a Roth IRA, the more lifetime taxes will be avoided. In Michael’s example, converting the $90,000 to Roth right now means that any future growth on the $90,000 also avoids future taxation. Were Michael simply to ignore the opportunity and the IRA subsequently doubled in value over the next decade, he would owe tax on $90,000 of growth that could have been avoided1. And this is a very important takeaway: the sooner that IRA basis is isolated and converted to Roth as outlined above, the greater the future tax savings will be2.