Missouri workers enjoy one of the more generous state minimum wages in the central United States: $13.75 per hour as of January 1, 2025 — nearly $6.50 more per hour than the federal floor of $7.25 set by the Fair Labor Standards Act (FLSA). This calculator converts that hourly rate into the numbers that matter for day-to-day planning: weekly gross pay, monthly gross and annual gross salary, with FLSA overtime built in automatically whenever you work more than 40 hours in a week.
How it works
Enter your hourly wage (pre-filled with the Missouri 2025 minimum of $13.75) and your average hours per week. The calculator divides your hours into two buckets:
- Regular time — the first 40 hours at your straight-time rate.
- Overtime — every hour beyond 40 at 1.5 times your regular rate, as required by FLSA Section 7(a)(1) (Missouri has no daily overtime rule; only the weekly 40-hour threshold triggers the premium).
Weekly gross = (regular hours x wage) + (overtime hours x wage x 1.5).
Monthly gross is derived as weekly x 52 / 12, capturing the exact calendar average. Annual gross is weekly x 52. All arithmetic runs entirely in your browser — nothing is uploaded or stored anywhere.
A warning badge appears if you enter a wage below $13.75 (Missouri state minimum) or below $7.25 (federal minimum), so you can spot non-compliant scenarios instantly. A second panel compares your entered wage against the Missouri minimum and the federal $7.25 rate side-by-side on an annual basis.
Worked example
Suppose you work 45 hours per week at the Missouri minimum of $13.75 per hour:
| Metric | Calculation | Result |
|---|---|---|
| Regular pay | 40h x $13.75 | $550.00 |
| Overtime pay | 5h x $20.625 (1.5x) | $103.13 |
| Weekly gross | $550.00 + $103.13 | $653.13 |
| Monthly gross | $653.13 x 52 / 12 | $2,830.23 |
| Annual gross | $653.13 x 52 | $33,962.76 |
At a straight 40 hours per week with no overtime, Missouri minimum wage produces a weekly gross of $550.00, a monthly gross of $2,383.33, and an annual gross of $28,600.00 — before federal income tax, Missouri state income tax (2.0%–4.95% in 2025), Social Security (6.2%) or Medicare (1.45%).
Compare that to a worker paid the federal minimum of $7.25/hr for 40 hours/week: their annual gross is just $15,080. The Missouri minimum wage generates $13,520 more per year at standard hours — a 90% premium over the federal floor.
Missouri minimum wage in context
Missouri’s minimum wage is set by Proposition B, a ballot initiative approved by Missouri voters in November 2006 and codified at RSMo 290.502. Proposition B introduced a state minimum wage above the federal rate and, critically, required it to be indexed to the Consumer Price Index for the Midwest urban region, updated every January 1. This means Missouri workers are protected from inflation eroding their minimum floor — unlike the federal $7.25, which has been frozen since July 24, 2009.
The 2025 rate of $13.75 reflects approximately 16 years of cumulative CPI adjustments on top of the original $6.50 rate set at Proposition B’s passage. Missouri’s Department of Labor publishes the new rate each autumn, based on the August-to-August CPI change.
Tipped workers are a special case under RSMo 290.512: employers may credit up to 50% of the minimum wage from tips, meaning the direct cash wage can be as low as $6.875/hr in 2025, provided actual tips close the gap. If tips fall short in any week, the employer must top up the difference to reach $13.75 effective.
Preemption note: Missouri’s 2015 preemption law means no city or county in Missouri may set a local minimum wage above the state rate, so $13.75/hr is the uniform floor statewide regardless of whether you work in Kansas City, St. Louis, Springfield or a rural county.
Use this calculator to model any hourly rate scenario — for instance, how a prospective $15/hr, $17/hr or $20/hr job offer translates into annual earnings — so you can compare offers, negotiate pay rises, or stress-test a household budget with confidence.