yeah, its basically a pre-tax savings account, with no growth. When you hit retirement age and haven't used the money, you take can take it out. Some of them let you take it out at the end of the fiscal year if you haven't used it....some of them only go so high as the HDHP insurance plan doesn't cover (ex. I have a 2500 deductible before insurance kicks in, so I can only keep up to 2500 in) Why would I want to open an HSA if I have an amazing ppo health insurance plan? And for that matter can you even open one without an HDHP plan?
		
		
	 
An HSA (health savings account) is a pre-tax savings plan. That part you have correct. Beyond that, I think you need to learn a bit more about them before posting.
 
You cannot open an HSA without a high deductable health insurance plan (HDHP). By that, you need a deductable of at least $1200 for a single person or $2400 total for your family. Why would you want an HSA? Because the premiums tend to be near $0/month (expecially if your company pays premiums for their employees), it covers you for almost any catastrophy, and you can then get the tax benefits of the HSA. In other words, in general your only cost is that you pay for the deductable out of pocket (as low as $100/month for a single person $200/month for a family). That is the worst-case scenario, as you might not even need to use the insurance and meet that deductable. That worst-case cost is lower than the premium in many other plans even most so-called amazing PPO plans.
 
The tax benefits are that it is pre-tax investment and the investment gains aren't taxed if you have a medical expense of the withdrawl size or larger. Suppose a person is in the 25% federal tax bracket and 8% state income tax bracket, puts $3000 into the HSA, invests and gets 8% return for 40 years. Since it is pre-tax, that $3000 only costs you $2010. In 40 years that becomes $43,666. You can then withdraw it and pay taxes or if you have medical expenses (like most people do in retirement), withdraw the full $43,666 and never pay taxes.