Why not just use a little 'creative parenting' and 'set-up' the Roth IRA for your child but continue to funnel the money into a savings account until s/he has $1,000?? I doubt a child that age is going to want to pull his quarterly statements and analyze his $4 in earnings. Once he hits $1,000, open the Roth, discuss his portfolio, and give him more control if he desires it.
Thanks for the suggestion - yes, I agree completely about the $4 earnings being uninteresting. What you describe is certainly a defensible approach, particularly if one wants to put the funds in a place with a $1,000 minimum. One
caveat is the $1,000 would have to be earned in a single year, or in consecutive years if one remembers to fund the Roth between 1-Jan and 15-Apr of the 2nd year, designating part for year 1 and the rest for year 2. Any earned income not placed into the real Roth by April 15 of the subsequent year is ineligible for future Roth use.
The quantitative advantage of doing a real Roth now is that
all earned income (up to the annual limit) can go into the Roth and have tax free growth forever (or until tax laws change). Yes, if that is only $100/yr for a few years then the total dollar amount would be small and perhaps not worth the trouble. We're expecting somewhat higher amounts in coming years, however, so starting now on the right path (and the qualitative advantage of establishing the mindset) seems worthwhile.
We sent paperwork to Schwab to establish a custodial IRA - haven't heard back yet but it has been only a couple of days.
One adder: my intent is to follow the strategy outline here:
http://www.cbsnews.com/news/kids-and-money-start-them-early-with-a-family-401k/. While the dollar amounts are small, he gets to keep them and I'll fund the Roth for him. The IRS doesn't care about the fund source, just that the amount is not greater than his earned income. Eventually (as we already do with his older siblings) I'll match Roth contributions 1-for-1 so he (and they) have "skin in the game."