Settling a $12,000 credit card debt for $6,000 sounds like a $6,000 win. The actual math is more complicated. The IRS considers the forgiven $6,000 taxable income, adding $1,320 in federal taxes at a 22% rate. A settlement company charges 15-25% of the enrolled balance ($1,800-$3,000 in fees). Your credit score sustains significant damage starting the day you stop making payments — damage that sits on your report for 7 years. And the settled account shows "settled for less than full amount," not "paid in full," which affects future mortgage approvals and rental applications for years afterward. Sometimes settlement is still the right call. Here's when it is and when it isn't.