The Social Security payroll tax in the United States is set at a 6.2% rate for employers and their employees, and it hasn’t changed in years. However, the tax applies only to a certain maximum amount of wages each year. For 2018, the maximum for taxable Social Security wages is increasing by $1,500, which translates to more Social Security taxes for high-income individuals. Here’s the new high for Social Security maximum taxable earnings, and what it could mean for your tax bill.