The dollar limit for contributions to a medical FSA for 2015 is $2,550. Each spouse can contribute up to this limit as long as each works for an employer offering such a plan. This enables a couple to exclude from their taxable compensation a total of $5,100. This is so even if both spouses work for the same company.
This is generally adjusted gross income increased by certain items such as tax-free foreign earned income. MAGI usually is used to determine phaseouts of certain deductions and credits.