If you are injured or have a medical condition that has prevented you from working, you may be wondering if you should apply for Social Security Disability benefits. Both SSDI and SSI claims can take a long time to process. It is not unusual for the Social Security Administration to take more than 90 – 120 days to reach a determination. During that long waiting period applicants can experience a great deal of financial stress, so if you have a disability, you should apply as soon as you are eligible.