How an Overtime Paycheck Is Built
Gross pay starts with the base: hourly rate times regular hours — $25.00 × 80 = $2,000.00 on a biweekly schedule. Overtime attaches to hours past 40 in a workweek at 1.5x under the FLSA, so eight OT hours add $37.50 × 8 = $300.00. Double time, where an employer offers it, adds 2x hours — eight holiday hours at $50.00 add $400.00.
The layers stack rather than replace each other. A 5% night differential applied to all 88 default hours adds $110.00, bringing gross to $2,410.00. That stacking is why two checks with the same total hours can differ by hundreds of dollars — premiums drive the number as much as hours do. Bump the differential to 10% for weekend coverage and the same hours gross $2,520.00 — a $110.00 difference from one input.
For weeks that mix two different base rates, the regular rate becomes a weighted average before the 1.5x multiplier applies. The overtime calculator handles that blended-rate case directly. To reconstruct hours from punch times first, run your clock in and clock out records through the time card calculator.
From Gross to Net: Where the Money Goes
Gross is the headline; net is the deposit. Pre-tax deductions come off gross first — the default $180.00 in 401k and health premiums drops taxable pay to $2,230.00. Taxes at a 22% effective rate withhold $490.60, leaving $1,739.40. That is 72.2 cents of every gross dollar reaching your account. Run the same arithmetic on a raise: at 22%, every extra $1,000 of gross adds $780.00 to the deposit.
The effective rate bundles federal income tax, Social Security at 6.2%, Medicare at 1.45%, and state income tax where it applies. On the default gross, FICA alone is $184.37. A single rate field keeps the model honest: whatever your stub's year-to-date numbers imply, that percentage is what the calculator applies to every dollar.
For a full deduction stack — retirement, HSA, health premiums, garnishments — the gross to net calculator models each line separately. Use this page when overtime and differentials are the moving parts; use that one when the deduction structure is.
Shift Differentials and Premium Stacking
Differentials reward inconvenient hours: nights, weekends, holidays. The calculator applies your percentage to every hour in the period, so a 5% differential on the defaults adds $110.00, while a 15% differential — common for nurses on permanent nights — adds $300.00 on 80 hours, or $7,800.00 a year at 26 periods. Typical ranges run 5-15% for second shift and 10-20% for third shift, with hospital night shifts clustering near 10-18%.
There is a compliance wrinkle worth knowing. Nondiscretionary differentials, set by policy or contract, must be included in the regular rate before the overtime multiplier applies. On a $25.00 base with a $1.25 differential, the correct OT rate is $39.38, not $37.50. Payroll systems automate this; hand checks often miss it.
Double-time policies vary by employer. Some pay 2x for holidays worked, others for a seventh consecutive day or hours past 12 in a shift. Since the multiplier applies to your full base rate, eight double-time hours add $400.00 at $25.00 — the same pay as 10.67 overtime hours.
Reading the Marginal Math on Extra Hours
The number that matters for deciding on another shift is the marginal keep rate. On the defaults, going from zero to eight OT hours adds $310.00 gross ($300.00 OT pay plus $10.00 differential) but $241.80 net — 78 cents per gross dollar at a 22% rate. The gap is ordinary taxation, not an overtime penalty.
Heavy weeks compound the effect. Twenty OT hours raise gross to $2,875.00 and net to $2,102.10 — $604.50 more than the no-overtime paycheck of $1,497.60. At 40 OT hours, which happens in staffing crunches, overtime pay alone reaches $1,500.00, over 40% of the entire check. Sweep the overtime field and the net gains stack linearly: 4, 8, 12, and 20 OT hours add $120.90, $241.80, $362.70, and $604.50 over the no-OT paycheck.
For quick per-shift estimates without the deduction stack, the hours to pay calculator gives gross wages from hours and a multiplier. Use it for side-gig quotes; use this page for the deposit that actually hits your bank account.
Calibrating Your Effective Tax Rate
The single most important input is also the most personal. Pull your last pay stub and divide year-to-date taxes by year-to-date gross — that quotient is your effective rate. A single filer earning around $52,000 typically lands near 20-24% all-in, which is why 22% is the default here. As a sanity check, a $52,000 salary withholding about $11,500 across the year lands at 22.1% — right in that band.
FICA has a ceiling worth modeling. Social Security's 6.2% stops at the annual wage base ($184,500 in 2026), so overtime late in a high-earning year is withheld at a lighter rate. Medicare's 1.45% has no cap, and a 0.9% surtax kicks in above $200,000. The FICA tax calculator computes the exact split.
States move the number substantially: nine states levy no income tax, while California and New York add several points on top of the federal burden. When your overtime is seasonal, average the rate across the full year rather than plugging in a peak-period stub, or the model will over-withhold your quiet months.
State Rules That Rewrite the Formula
The FLSA's 40-hour weekly trigger is a floor, not the whole map. California pays 1.5x past 8 hours in a day and double time past 12, plus special rules for a seventh consecutive day — the California overtime calculator runs that daily math. Colorado uses a 12-hour daily trigger; Alaska and Nevada apply daily variants of their own.
Florida follows the federal 40-hour week with its state minimum wage layered underneath — the Florida overtime calculator handles tipped overtime and the tip credit. If your state is not covered by a dedicated tool, start here with the weekly model, then check your state labor office for daily triggers.
Daily-overtime states make raw hours the wrong question: the same 88 hours can be legal straight time or carry 16 OT hours depending on how they distribute across days. Enter the hours your stub actually reports, not an estimate, and let the breakdown above tell you whether payroll got the distribution right. In California, the same 40 hours split 9-9-8-8-6 owe two daily OT hours; spread evenly across five 8-hour days, they owe none.
Budgeting an Unstable Paycheck
Overtime-heavy paychecks wreck budgets when treated as baseline. The default scenario deposits $1,739.40 with OT but $1,497.60 without — a $241.80 swing that repeats 26 times a year is $6,286.80. Rent, car payments, and other fixed costs should fit inside the smaller number with room to spare.
A practical split: cover fixed expenses from base net, then divide OT net between goals and flex spending. The budget calculator can pressure-test the fixed layer, while the annualized figure from the calculator above tells you what a steady-overtime year actually pays.
Watch the hidden costs too. Sustained 60-hour weeks raise gross but add expenses the calculator ignores: commuting, meals out, childcare, and fatigue-driven spending. Workers comparing total-hours offers often find the overtime premium evaporates at the lifestyle level — model both scenarios before committing.
Annualizing and Comparing Offers
The annualized line assumes 26 biweekly periods: $1,739.40 × 26 = $45,224.40. Semi-monthly pay with 24 checks runs $41,745.60 on identical hourly math — the $3,478.80 gap is calendar mechanics, not a pay cut. Weekly pay at 52 checks annualizes to the same $45,224.40 — the convention changes check size and budgeting cadence, not yearly income. Always ask which convention an offer uses before comparing it to your current stub.
For salary offers, convert both sides to the same unit. The biweekly pay calculator turns salary into per-check net, and the annual salary calculator does the reverse for your hourly-plus-OT income. When overtime is structural to the role, the hourly to salary with overtime calculator prices the full year directly.
One caution on averages: a $2,875.00 heavy week and a $2,100.00 light week do not average into a steady paycheck for cash-flow purposes, because bills cluster around due dates, not averages. Annualize for offers and retirement targets; budget on the floor, not the mean.