Extra-shift pay calculator
Compare baseline and planned gross pay. Assign each added shift to the right workweek and see the change in overtime.
HOW TO GET YOUR RESULT
- 1. Enter your hours and pay.
- 2. Review the four checks.
- 3. Select Show my result.
The example uses sample values and sample confirmations. For your own estimate, enter your details and review each check.
01 / ENTER YOUR DETAILS
Workweek and added shifts
Required. Review the four scope checks before calculating.
Week 1
2026-10-19 · 00:00Enter each block of worked time once, for one employer. Include all worked hours, including overtime. Do not enter an overtime-multiplied rate. Split time across the employer’s workweek boundary.
Your additional shifts
Same employer. Assign each shift to its workweek. Split a shift at a workweek boundary. Do not add hours already in your baseline.
Compare an employer-policy what-if
Optional hypothetical weekly threshold and total multiplier. Not a legal minimum. Does not change the federal estimate or paycheck comparison.
Review all four calculation scope checks. If a case is unsupported or unknown, a reliable result is not available.
03 / YOUR RESULT
Your pay estimate
First, review the four checks.
Complete step 2 before using an estimate. If any answer is No or Not sure, this calculator cannot provide a reliable result.
Go to the four checksPAY IN VIEW — RESULT WITHHELD Review all four calculation scope checks. If a case is unsupported or unknown, a reliable result is not available.
How much could an extra shift add?
Calculate the complete workweek before and after adding the shift, then subtract baseline gross from planned gross. Assign every shift to the correct workweek. With mixed rates, extra hours can change the weighted regular rate for that week.
Synthetic example: 38 hours at $24 gives $912. Add an eight-hour shift at $24: 46 hours gives $1,176, including six overtime hours. The shift adds $264 in gross pay. Taxes, deductions, and take-home pay are not estimated.
Keep biweekly workweeks separate. Check the supported method before planning.
Federal-only estimate for supported hourly arrangements with one employer. State/local rules, exemption decisions, bonuses, and other unmodeled compensation are excluded. Method and limits · Sources checked 2026-10-22
Saved workweeks
Save a snapshot of your period, rates, checker, and shift plan. Nothing saves as you type. History is not synced or automatically backed up. Export a private copy when you need one.
No saved workweeks yet. Your current calculation stays in this tab until you save it.
About this estimate
These tools use standard federal weekly overtime rules. State rules and some pay arrangements need a different calculation.
Read the method and assumptionsWhy is overtime calculated per week?
Under the standard federal weekly method, overtime applies to hours worked above 40 in each employer workweek. A two-week paycheck does not permit averaging hours across weeks. Use complete employer workweeks. See an example →
What does a paycheck difference mean?
It is a difference to review. Check hours, formats, compensation, and applicable rules. It does not establish liability. Read the line-item guide →
Do you save my pay details?
Gross-pay history saves only when you enable device saving and press Save. There is no cloud sync. Paycheck and W-4 inputs stay in tab memory and are not saved in that history. Read the privacy details →