Q: Why is it that the GS base salary does not equal the annual salary when multiplied out? (I’m a GS 13/3 in D.C. My annual salary is $94,969. My base salary is computed as $45.51/hour x 80 hours x 26 weeks = $94,660.80, a difference of $308.20, or approximately 38 hours). We’re in the middle of refinancing the house and the bank is asking. A: Regardless of what you see on a pay chart, your basic pay will always be the actual amount received during a calendar year, which, by law, is 2,087 hours long.