Extra Shift Overtime Cost Checker

Estimates whether an employee picking up an extra shift or trading into a longer one crosses the weekly overtime line, and what the premium would cost, for managers approving shift pickups.

Your estimate

Projected hours this week after the pickup...

Overtime hours this week after the pickup...

Overtime premium added by this pickup...

Verdict...

Estimates only. Assumptions are listed below, and you can change every input.

The most common way a shift swap quietly costs money is overtime nobody planned for. A team member offers to cover a Saturday, the manager says yes in the group chat, and payroll finds out on Monday that the pickup pushed that person to 46 hours. This checker gives you the answer before you approve: what the week looks like after the pickup, how many hours land above the threshold, and what the premium adds to labor cost.

The math is deliberately simple. It takes the hours already on the schedule, subtracts any hours the employee is giving away in the trade, adds the picked-up shift, and compares the result to your weekly overtime threshold. Any hours above that line are multiplied by the base rate and the overtime premium (the multiplier minus one) to show the extra cost of saying yes. It does not model daily overtime rules, shift differentials or exempt status, so treat it as a fast sanity check rather than a payroll calculation.

How to use this tool

Enter the hours the employee already has on the schedule for the workweek, then the length of the shift they want to pick up.
If this is a trade rather than a straight pickup, enter the hours of the shift they are giving away so the week nets out correctly.
Set the base rate, your overtime threshold and multiplier, and read the projected weekly hours, overtime hours and the premium before you approve.

What the math assumes

Overtime is measured on a weekly basis against the threshold you enter; the default of 40 hours matches the federal weekly rule for non-exempt employees, and daily overtime rules used in some states are not modeled.
The overtime premium equals overtime hours multiplied by the base rate and by the multiplier minus one, so a 1.5 multiplier adds half the base rate per overtime hour.
Hours given away in a trade are subtracted from the week before the picked-up hours are added, and the premium shown covers only the hours this request adds above the threshold.
The base rate you enter is treated as the regular rate; shift differentials, bonuses and commissions that can raise the regular rate for overtime purposes are ignored.
The employee is assumed to be overtime eligible (non-exempt) and the workweek is assumed to be a single fixed seven-day period.

Frequently asked questions

Does this checker handle daily overtime rules like the California eight-hour rule?

No. It only checks weekly hours against the threshold you set. If your state applies daily overtime, run a separate check on the length of the individual shift as well.

Why is the premium lower than I expected when the employee is already over 40 hours?

The premium shown is only for the hours this request adds above the threshold. Hours that were already in overtime before the pickup are counted in the overtime total but not in the added premium, because you were already paying for them.

What should I enter for hours given away in a swap?

Enter the paid length of the shift the employee is handing to a coworker. In a like-for-like swap of two eight-hour shifts, the week nets to zero change and the checker will show no new overtime.

Link to this toolhttps://shifttradr.com/tools/extra-shift-overtime-checker/

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More free tools from ShiftTradr

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Floor Coverage Headcount Planner: Estimates how many people you need on the roster to keep a minimum number of staff on the floor for every open hour, allowing for absences and a coverage buffer, for managers building or resizing a shift schedule.

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