By contributing a minimal amount you can accrue benefits for every year you are overseas. If you decide to work within the mission you will continue to contribute to your Social Security plan through payroll deductions. However, if you decide to work on the local economy or initiate a home-based business, you will need to earn “credits” by contributing through self- employment taxes or through a totalization agreement. In order to qualify for Social Security payments you have to earn a certain number of credits in a lifetime. If you were born prior to 1929 you.