Calculate your overtime earnings, estimate your paycheck tax withholdings, and see your extra take-home pay under standard vs. tax-free overtime policies.
Calculating how much you would save under a tax-free overtime policy involves isolating your overtime wages, estimating your marginal tax withholding rate, and determining which taxes (federal, state, or local) are being excluded.
To automatically calculate how much tax you pay on your overtime hours (representing your potential savings under an untaxed policy) in Excel or Google Sheets, use this formula where Cell A1 is overtime hours worked, Cell B1 is your base hourly rate, and Cell C1 is your tax withholding rate (e.g. 0.22):
=A1 * (B1 * 1.5) * C1
How it works: The formula calculates your total gross overtime pay at time-and-a-half, then multiplies it by your estimated decimal tax withholding rate.
A very common myth among hourly workers is that working overtime is pointless because "it gets taxed at a higher rate." Under federal tax law, **this is mathematically incorrect**. Overtime pay is taxed as standard ordinary income at the end of the year.
However, because payroll systems process your taxes on a per-paycheck basis, a large paycheck with lots of overtime makes the system assume you earn that high salary all year long. This temporarily forces your payroll software to withhold taxes at a higher bracket (often the **22% supplemental wage flat rate** defined by the IRS). When you file your taxes at the end of the year, any excess withholding is refunded to you.
In 2023, the state of Alabama passed a historic law (Act 2023-421) to relieve the tax burden on hourly workers. Effective January 1, 2024, through 2025, hourly non-exempt employees do not pay Alabama's standard **5% state income tax** on any overtime hours worked beyond 40 hours in a single workweek. This represents a real, live state tax-free overtime policy that has successfully increased take-home pay for thousands of Alabamians.
Quick answers to common questions about overtime taxation and potential tax savings.
No, overtime is ordinary income and is taxed at the exact same tax rate as your regular pay at the end of the year. However, because payroll software calculates withholding on a single paycheck projected annually, a larger paycheck causes your employer to temporarily withhold taxes at a higher rate. Any overwithholding is returned to you as a refund when you file your annual tax return.
Alabama Act 2023-421, which took effect on January 1, 2024, exempts hourly overtime wages (earned on hours worked exceeding 40 per week) from Alabama's standard 5% state income tax. Hourly workers in Alabama still pay federal income taxes and FICA (Medicare/Social Security) on their overtime hours, but keep an extra 5% of their gross overtime pay due to the state exemption.
To calculate your tax savings under a completely tax-free overtime policy: multiply your overtime hours by your overtime rate (usually 1.5× regular pay) to find your gross overtime pay, then multiply by your estimated tax withholding rate. For example, if you earned $400.00 in gross overtime pay and your withholding rate is 22%, your tax savings is $88.00 ($400.00 × 0.22).
All the time conversion tools you need, completely free.
Convert hours and minutes to decimal format for payroll and timesheets.
Convert decimal hours back to hours and minutes format (HH:MM).
Convert any decimal time like 7.75 back to hours and minutes instantly.
Add multiple time entries and get total decimal hours for the week.
Calculate gross pay by multiplying decimal hours by your hourly rate.
Full reference chart — every minute from 1 to 60 in decimal format.
Calculate total hours worked between start/end times with break deduction.
Multiply hours, minutes, and seconds by any multiplier factor instantly.