Administrative Assistant Salary in Missouri (2026)
Median Administrative Assistant salary in Missouri is approximately $39,600/year — about 10.0% below the national average.
Annual salary breakdown
After-tax estimate
Administrative Assistant salaries in Missouri, explained
The estimated median Administrative Assistant salary in Missouri is $39,600/year, which is about 10.0% below the US national median of $44,000. That works out to roughly $19/hour at a standard 40-hour week, $762/week, $1,523/biweekly, or $3,300/month before taxes.
Missouri ranks 45 of 51 US states (including DC) on a cost-of-living-adjusted compensation basis. The state multiplier of 0.90× reflects how typical wages adjust to local prices — higher in places like California, New York, and Massachusetts; lower in Mississippi, West Virginia, and Arkansas.
What affects your actual salary
- Experience level: entry-level often 25–35% below median, senior roles 40–60%+ above.
- Metro area within Missouri: major metros pay more than rural areas. Bay Area vs Central Valley California is a 30%+ swing.
- Employer size: large companies typically pay 10–20% more than small businesses for the same role.
- Industry: a Software Engineer at a tech company makes more than at a non-tech employer; a Marketing Manager at a top brand earns more than at a startup.
- Education and credentials: degrees and certifications can shift compensation by 15–30%.
- Negotiation: simply asking for more and negotiating can move offers 5–15%.
Take-home pay in Missouri
Of the gross $39,600, you take home roughly $29,047 after federal income tax (~14% effective at this income level), FICA (7.65%), and Missouri's state income tax (roughly 5% effective). That's about $2,421/month after-tax.
For a precise after-tax calculation including 401(k) contributions, HSA, filing status, and state-specific brackets, use our Missouri Paycheck Calculator. For comparisons across cities, see the Paycheck Calculator with city-specific tax data.
Where this number comes from
Our estimate combines: (1) US national median for Administrative Assistant based on Bureau of Labor Statistics Occupational Employment Statistics, and (2) Missouri's cost-of-living multiplier derived from BEA Regional Price Parities. The multiplier captures average wage adjustment to local prices — useful for budgeting and offer comparisons.
For more precise numbers specific to your role and metro: BLS OES (bls.gov/oes), Glassdoor, Levels.fyi (tech roles), salary.com, or LinkedIn Salary Insights. Cross-reference 2-3 sources before negotiation.
Related tools
Salary Calculator — convert hourly to annual. Missouri Paycheck Calculator — exact take-home. Income Tax Calculator — federal tax with brackets. Missouri Mortgage Calculator — what you can afford. Investment Calculator — long-term growth from this income.