The 10-year figure comes into play where you would be able to use your husbands earnings to qualify for social secrity for yourself – NOT that you would “get half of HIS social security.” Social security is not a divisable asset of the marriage. That said, you can visit the NYS court system website & use their maintenance calculator to get an idea of what you may get in terms of alimony. Schedule a consult with a NYC Divorce attorney for a full assessment.