How long do I have to apply Social Security disability benefits?

There's no specific time limit to file a claim, however, you want to file a claim as soon as possible after you stop working or find that you are no longer able to work in any capacity. I will say also that your credits for disability insurance benefits also expire after a while. That doesn't mean you can't file after your credits expire, it just means that you're going to have to go back and prove that your disability began before your credits expired.