I'll keep this short and sweet.
We have a 529 plan for our two kids, aged 4 and 2. We live in a state that provides no tax benefit for a 529. We have about $18k in the 529 plan.
It seemed to us that a Roth IRA is pretty much the same thing as a 529, with the advantage that with a Roth IRA, the money doesn't have to be used for college. So we now dump our kids' college savings into my Roth IRA, since we are under the impression that you can withdraw Roth IRA money for qualified educational expenses.
Questions:
1. Is there some advantage to the 529 that we're missing?
2. Is there a reason we should open two 529s--one per kid? Our understanding is that the 529 can be used for qualified educational expenses for any member of the family, so what's the point of having more than one?
3. Is there a disadvantage to using my Roth IRA that we're missing? We can't afford to max out one for me and one for my husband, so that's not a problem for us.
1. Nope. As noted, the biggest draw is a state income tax deduction or credit. Most states have one, but only for state taxpayers. If yours doesn't, then, as a previous poster noted, that makes them less attractive. A few other minor benefits are (1) sometimes states will allow employers to set up automatic payroll deductions into 529s, (2) There are usually low minimums to open a new account, and (3) not applicable to you at the moment, but a 529 usually has a higher annual contribution limit.
2. Yes, there is. Your statement is approximately accurate but technically wrong - and the IRS cares about technicalities. 529 distributions can only be used to pay for qualified educational expenses for the named beneficiary on the account; otherwise the distribution is taxable. So if you had one 529 for your older child and used money from that 529 to pay for expenses for your younger child, then that distribution would be taxable and possibly even penalized 10%. It is easy to get around this. Either (a) open two different 529s, one for each kid, and/or (2) transfer money between the two 529s.
3. If you might qualify for financial aid, there is a secondary effect. While the withdrawal from your Roth IRA to pay for college expenses is tax free and doesn't affect that year, the withdrawal should be reported as tax free income on the following year's FAFSA application, and would, on average, reduce the amount of aid offered the next year. If this results in a larger Roth IRA withdrawal in year 2, then this would have a snowball effect. There are a few other disadvantages listed here:
http://www.finaid.org/savings/retirementplans.phtml