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Will the New Kiddie Tax Rules Save You Money?

By Dan Caplinger - Updated Nov 29, 2018 at 8:33AM

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Some new strategies could result from changes in how tax laws treat investment income for children.

Many of the changes that came into effect after the passage of the tax reform law in 2018 got a lot of immediate attention. Just a few of the high-profile provisions that policymakers and tax analysts pored through: slashed tax rates for corporations, a larger standard deduction and lower tax rates for individuals, and changes to some other deductions and exemptions that taxpayers were previously entitled to take.

Yet one fairly obscure provision could produce substantial savings for some taxpayers. The so-called kiddie tax rules affect how investment income and other unearned income that children receive get taxed. Although the kiddie tax laws are supposed to discourage tax planning involving moving income-generating assets into children's hands, changes to the laws could actually result in a new upsurge in returns that seek to take advantage of the provision.

Five children with hula hoops run in a grass field on a sunny day.

Image source: Getty Images.

The origins of the kiddie tax

Prior to the imposition of the kiddie tax, one tax strategy involved putting income-producing assets in the name of one's children. Since most kids have no earned income, they're in much lower tax brackets than their working parents, and so the tax rates that would ordinarily apply to them result in substantial tax savings.

In response, lawmakers created the kiddie tax provisions. The kiddie tax put limits on how much unearned income -- that is, income from investments and sources other than work -- children could receive in a tax-favored manner. Applying to children under age 19 as well as those who are full-time students under age 24, the old kiddie tax law put a limit of $2,100 on how much unearned income a child could receive. Half of that amount was free of tax, and the other half got taxed at the child's rates. Above $2,100, though, the parents' tax rates applied. That made it irrelevant whether those extra assets were in the parents' name or the child's name -- either way, the tax would be the same.

The new kiddie tax rules

The new rules under tax reform were a lot different. They eliminated taxing the child's excess unearned income at the same rate as the child's parents. Although they kept the same treatment of the original $2,100 -- no tax on the first $1,050, and the child's rate on the next $1,050 -- there the similarities ended.

Instead, the tax rates for income above the $2,100 threshold matched up with how the tax laws impose income tax on trusts and estates. Below, you can see the brackets that apply for the 2018 tax year.

For Additional Income (Above the First $2,100):

Kiddie Tax Rate

$0 to $2,550

10%

$2,550 to $9,150

24%

$9,150 to $12,500

35%

More than $12,500

37%

Data source: Internal Revenue Service.

From the table, you can draw a couple of conclusions:

  • In general, the new laws discourage excessive child income above $11,250 ($2,100 plus $9,150). With rates of 35% or more applying, the new kiddie tax is worse than the old for the vast majority of taxpayers.
  • For high-income taxpayers, the new rules are a big boon. If you're already a top-bracket taxpayer, then you can shelter a lot more income per child at low rates under the new rules than you could under the old ones -- roughly $9,150 more, in fact. By paying rates of 10% and 24% on that $9,150 rather than 37%, top-bracket taxpayers would save almost $1,550 in tax due to the new rules.

In addition, the new rules open additional opportunities on capital gains. The first $2,600 of capital gains above the $2,100 income limit qualify for a 0% tax rate, with the 15% rate applying up to $12,700 and the 20% maximum rate applying above that. For parents who were already maxed out at the 20% rate, those provisions offer other ways to save.

Be smart about your kids' finances

Of course, transferring income-producing property to your kids for tax purposes has other consequences. The most important is that you can't simply give kids property and then take it back, or you'll be treated as having made the transfers solely to avoid taxes. In other words, you have to be willing to give your kids actual property in order to use the strategy correctly.

Still, for high-income taxpayers who are willing to accept those consequences, tax reform has brought a substantial boon. With less than three months left in the year, you'll have to act quickly to get income into your kids' names in time to use the kiddie tax provisions to your advantage.

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