These differences may be of significance in assuring that larvae and adults of the same species do not engage in direct competition for food or living space. Examples of metamorphosis include the tadpole, an aquatic larval stage that transforms into the land-dwelling frog (class Amphibia). Starfishes and other echinoderms undergo a metamorphosis that includes a change from the bilateral symmetry of the larva to the radial symmetry of the adult. Metamorphic patterns are well-known in crabs, lobsters, and other crustaceans and also in snails, clams, and other mollusks.
In addition to income taxes, everyone must pay Social Security and Medicare taxes. If you are self-employed you need to make these tax payments yourself since you donât have an employer to send it in for you. For 2015, employees pay 7.65 percent of their income in Social Security and Medicare taxes with their employers making an additional payment of 7.65 percent.
How to Plan for, Minimize, and Report the Self-Employment Tax. The Self-Employment Tax is how an independent contractor pays Social Security and Medicare payroll taxes. In the case of an employee, the employer and employee split the cost of Social Security and Medicare taxes, each paying 7.65% of eligible wages. An independent contractor, by contrast, is both the employer and the employee, so a self-employed person pays both halves, or 15.3% total. The 15.3% self-employment tax is composed of a 12.4% Social Security tax on the first $127,200 of net self-employment income for the year 2017, and a Medicare tax of 2.9% on all net self-employment income.