For example, if you wish to calculate a monthly average number of hours worked and use six months of data, divide the total hours your employee works in six months and divide the result by six to determine the monthly average hours of work for the employee.
Social Security disability payments may be includable in taxable income and still not increase the tax you pay. A lump-sum retroactive payment of Social Security Disability Insurance (SSDI) may be includable in taxable income, depending on the amount and your other income and deductions.
1. If you are single and your modified adjusted gross income (MAGI) plus half of your Social Security benefits is more than $25,000 but less than $34,000, then up to half of your disability benefits will be taxable. If your income is above $34,000, then up to 85 percent of your Social Security may be taxed. 2.