Liz Weston

Dear Liz: I agree with this concept of delaying Social Security to lessen overall taxes and have a further suggestion. My spouse and I are gradually converting our traditional IRA account funds to Roth IRAs. The converted funds are immediately taxable but could continue to gain in value and future distributions would not be taxable. Also, Roth accounts don’t have required minimum distributions.

Answer: Conversions make the most sense when you expect to be in the same or higher tax bracket in retirement.

That’s not the case for most people because they’re in a lower tax bracket when they stop working. Some older people, however, do face higher tax rates in retirement — typically because they’ve been good savers, and required minimum distributions from their retirement accounts will push their tax rates higher.

When that’s the case, they may be able to take advantage of their current lower tax rate to do a series of Roth conversions.

The math can be tricky, though, so it’s advisable to get help from a tax pro or financial planner. You don’t want to convert too much and push yourself into a higher tax bracket, or trigger higher Medicare premiums.

If your intention is to leave retirement money to your heirs, Roth conversions may also make sense now that Congress has eliminated the stretch IRA.

Stretch IRAs used to allow non-spouse beneficiaries — often children and grandchildren — to take money out of an inherited IRA gradually over their lifetimes. This spread out the tax bill and allowed the funds to continue growing. Now inherited IRAs typically have to be drained within 10 years if the inheritor is not a spouse.

To compensate, some people are converting IRAs to Roths — essentially paying the tax bill now, so their heirs won’t have to do so later. Heirs would still have to withdraw all the money in an inherited Roth IRA within 10 years, but taxes would not be owed.