Sum of the Monthly Contribution Limits
Under the sum of the monthly contribution limits rule, the maximum contribution is determined monthly based on eligibility and HDHP coverage on the first day of each month. For this purpose, the monthly limit is 1/12 of the annual contribution limit, as calculated on the Limitation Chart and worksheet.
For more information, refer to the Limitation Chart and Worksheet in the instructions for Form 8889, Health Savings Accounts.
Maria, age 48, was an eligible individual with self-only HDHP coverage. She was covered from January through September. She was not an eligible individual for the remaining months of October, November, and December 2011. Her maximum contribution allowed is $2,287.50 [($3,050 x 9) divided by 12].