Roth IRA Conversion – no out of pocket costs

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no out of pocket costI’ve always been surprised that these two issues arise when discussing a Roth IRA conversion:

  1. the conversion only makes sense when the tax is paid with funds outside the IRA
  2. the reason many people don’t convert is because of the current pain of paying the conversion tax

One would think that these two points would be quickly followed by the third point:

Use an interest only home equity loan to pay the conversion tax, avoid any out of pocket costs and gain potential positive earnings arbitrage.

People of course use their home equity for all sorts of reasons—vacations, new kitchens, college funding, etc. One of the best long term financial planning reasons is to pay the conversion tax.

Let’s take a look at the result.

The prime rate is currently 8.25%. Interest only home equity loans are readily available at prime minus .75 or 7.5%.

Assumptions:

$300,000 IRA

38% combined federal and net state tax on conversion = $114,000

Interest only home equity loan at 7.5%

The conversion is done and the tax is financed with the home equity loan. The investor now has a tax deductible annual interest payment of $8550. The investor can take this amount out of pocket (much smaller than the $114,000 out of pocket) or he has a couple other choices:

  1. withdraw from the Roth and assuming a combined tax bracket of 30%, the withdrawal needs to be only $5985 ($8550 – 30% tax deduction)
  2. if the loan is in the form of a credit line, increase the credit line by $5985 and use those funds

In either case, as long as the Roth averages a return of 5.25 (7.5% interest on the home equity loan less 30% tax deduction), there is positive arbitrage on the borrowed funds. Some banks are offering 6% on riskless CDs now so this is not a hypothetical discussion that could work, the figures are favorable currently.

(One might argue that the limitation on home mortgage interest deduction limits the application of borrowing. However, there are creative ways to overcome this. One could claim that the borrowing was for other non-IRA investment activities and claim the deduction as investment interest expense or borrowing for business purposes in which case the interest is deductible as a business expense).

The only risk in this transaction is potential negative arbitrage in later years. For example, if the investors buys a 5 year CD at 6% in his Roth and locks in a 5 years interest only loan at 7.5%, then he has positive arbitrage for 5 years. At the end of 5 years, it’s possible that the arbitrage could be against the investor if rate he can earn on investments declines and/or interest rates on home equity loans increase. However, this temporary pain can be mitigated as out of pocket cost can be avoided by increasing the balance on the equity line.

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