First of all, you must have worked in paid intersocial security for a sufficient amount of time. You have to earn what is called Sufficient Work Credits. You earn a maximum of four credits every year. The credits needed is determined by your age when you become disabled. Generally, you need 40 credits total with 20 credits earned within the last 10 years in order to be qualified or be insured. However, even if you are younger, you can still be eligible by requiring fewer credits. Based on the number of work credits, you will be eligible to be ensured for disability benefits to a certain date.