There are multiple reasons that you should apply as soon as possible. First of all, it is important to remember that your eligibility for Social Security Disability benefits are based on the number of quarters you have paid into the system over the last ten years. If you delay for a long period of time before you apply, you could potentially lose eligibility. Secondly, depending on your work history, it is possible that you may obtain a lower monthly Social Security payment if you delay applying for a long period of time. Thirdly, it is harder to construct a case with medical evidence over a longer period of time than a shorter one. Fourthly, it is also important to remember that the process of obtaining Social Security benefits is not a fast one. It can take months and years before a favorable decision will be rendered in your case. By procrastinating, you are delaying what is already a slow process.