The payment of principal is never a deductible expense. However, check the payoff information to see whether there were any fees paid in addition to principal; the fees may be considered a selling expense.
Tax paid by self-employed persons to finance Social Security coverage. In 2007, there are two rates. A 12.4% rate applies to a taxable earnings base of $95,700 or less and a 2.9% rate applies to all net earnings.