Time and a half of $13 an hour comes out to $19.50: multiply $13 by 1.5, or equivalently add half of $13 ($6.50) to the base wage. Under the FLSA, that's the minimum rate for hours worked past 40 in a workweek for non-exempt employees.
In real paycheck terms, a 45-hour week at this wage grosses $618 versus $520 for a standard 40 — the five overtime hours pay $98, as much as 7.5 regular hours. That leverage is why overtime shifts at $13/hour move a budget faster than the base rate suggests.
Working these hours in 2025–2028? The $6.50/hour premium portion may be federally deductible — see the no tax on overtime calculator. And if your employer pays 2x for some hours, that's $26.00/hour — the double time calculator covers it.