How much and how often can I/do I contribute to my HSA?

The U.S. Department of Treasury states that for 2009, if you have individual HSA-compatible health plan coverage, your contribution is $3,000; Your limit is $5,950 if you have a family coverage. If you are age 55 or older, you can also make additional "catch-up" contributions (see below). These amounts will continue to increase for inflation.

As for how often, you can contribute in a lump sum or in any amounts or frequency you wish. However, the financial institution that holds your account can impose minimum deposit and balance requirements. The same is true if you are receiving contributions from an employer.