1. Single Taxpayer Withholding Formulas
W is the withholding tax per pay period.
S is employee?s salary per pay period for each bracket.
X is the number of personal exemptions; X must be 0 or 1.
Y is the number of dependency credits; Y must be a whole number that is 0 or greater.
N is the number of pay periods.
A is the effect of the personal exemptions and dependency credits equal to or less than $12,500;
A=.021(((X * 4,500) + (Y * 1,000)) ÷ N)
B is the effect of the personal exemptions and dependency credits in excess of $12,500;
B=.018((((X * 4,500) + (Y * 1,000)) - 12,500) ÷ N)

If annual wages are less than or equal to $12,500, then
W=.021(S) - (A + B).

If annual wages are greater $12,500 but less than or equal to $50,000, then
W=.021(S) + .018(S - (12,500 ÷ N) ) - (A + B).

If annual wages are greater than $50,000, then
W= .021(S) + .018(S - (12,500 ÷ N)) + .0165(S - (50,000 ÷ N)) - (A + B)

2. Married Taxpayer Withholding Formulas
W is the withholding tax per pay period.
S is the employee?s salary per pay period for each bracket.
X is the number of personal exemptions. X must 2.
Y is the number of dependency credits. Y must be 0 or greater.
N is the number of pay periods.
A is the effect of the personal exemptions and dependency credits equal to or less than $25,000;
A=.021(((X * 4,500) + (Y * 1,000)) ÷ N)
B is the effect of the personal exemptions and dependency credits in excess of $25,000;
B=.0175((((X * 4,500) + (Y * 1,000)) - 25,000) ÷ N).

If annual wages are less than or equal to $25,000, then
W=.022(S) - (A+B)

If annual wages are greater $25,000 but less than or equal to $100,000, then
W=.022(S) + .0175(S - (25,000 ÷ N)) - (A + B).

If annual wages are greater than $100,000, then
W=.022(S) + .0175(S - (25,000 ÷ N)) + .0169(S - (100,000 ÷ N)) - (A + B).

Note(s):

• All amounts are annual unless otherwise noted