$100,000 Salary After Tax in Missouri 2026

$100,000 Missouri single-filer take-home pay in 2026 (suburban, no city earnings tax) is approximately $75,510 per year, or $6,293 per month. The IRS takes about $13,170 in federal income tax (2026 brackets per Rev. Proc. 2025-32, after the $16,100 single standard deduction). Missouri takes about $3,670 — 8 progressive brackets compressing to a 4.7% top rate above $9,436 of taxable income (so effectively flat 4.7% for any salaried professional). MO uses federal-conforming standard deduction ($16,100 single) — uniquely clean among state systems — plus a deduction for part of your federal income tax: 15% of it at this income, which is $1,976, not the $5,000 ceiling. FICA takes $7,650: 6.2% Social Security on the first $184,500 of wages plus 1.45% Medicare on everything.

Per-paycheck math depends on your employer's schedule. Semi-monthly (twice a month, 24 paychecks/year) lands at $3,146 per check (no city tax). Biweekly (every two weeks, 26 paychecks/year) lands at $2,904 — and gives you two months a year with three paychecks. Weekly is $1,452 if you're paid that way. KC or STL city residents subtract approximately $42/month from semi-monthly checks ($1,000/year city earnings tax).

Married filing jointly substantially improves the federal math. If $100,000 is the household total with both spouses jointly filing, the $32,200 MFJ federal standard deduction reduces federal taxable income to $67,800 — producing about $7,640 federal tax. MO MFJ uses the same $32,200 federal-conforming SD, and the federal-tax deduction is 15% of that $7,640 — about $1,146, nowhere near the $10,000 MFJ ceiling. MFJ joint MO tax: ~$2,952. Combined MFJ take-home: approximately $81,758/year, or about $6,248 more than the single-filer version of the same income.

Missouri's signature paycheck-relevant feature is the Kansas City and St. Louis 1% earnings tax — unusual among US cities in applying to BOTH residents AND non-resident workers. A Belleville IL resident working in downtown STL owes the 1% earnings tax on STL-source wages despite IL residency. Same applies for Olathe KS resident working in KC MO. The structural workaround: live AND work in MO suburbs (Chesterfield / Webster Groves / Ladue for STL; Lee's Summit / Liberty / Blue Springs for KC) to skip the 1% earnings tax entirely. Plus MO has no city earnings tax in Springfield, Columbia, Joplin, or other smaller MO cities. Missouri's federal income tax deduction runs the OPPOSITE way to the intuition: the percentage falls as Missouri AGI rises and hits zero above $125,001, so it is worth most at modest incomes and nothing at $200K+. At $100K it is 15% of ~$13,170, about $1,976 off the state base.

Where you live in MO matters more than the income line itself at $100K — and the KC / STL city-vs-suburb residency decision is the biggest variable. The same gross goes differently in Webster Groves than in St. Louis city:

Your $6,293 monthly take-home (suburban, no city earnings tax), the realistic version for a $100K Missouri professional in KC or STL suburb:

• Rent (1BR): $1,000-1,400 in KC suburbs = 16-23% of take-home; $1,100-1,600 in STL suburbs; $1,000-1,500 in KC / STL central; $700-1,100 in smaller MO cities. The 30% rule ($1,859) holds with substantial margin everywhere in Missouri.
• Groceries + dining: $500-700 for a single person eating mostly at home; $700-1,000 with regular dining out. MO grocery prices run near national median; KC and STL food scenes have grown substantially at moderate pricing.
• Transportation: $400-650/month (MO is car-dependent — KC has limited Streetcar + RideKC bus; STL has limited Metro light rail + bus). Gas $2.95-3.20/gallon (among the lowest in the country). Auto insurance runs near national average.
• Health insurance employee share: $100-280 for typical employer plans; lower at large MO employers (Oracle KC, BJC Healthcare, Boeing, Cerner legacy, Anheuser-Busch InBev, Edward Jones, Centene).
• Utilities + heating / A/C: $200-400/month combined. MO seasonal extremes both ways — winter heating ($250-350/month Dec-Feb), summer A/C ($200-300/month Jun-Aug).
• Add it up: essentials run $2,000-2,800/month in MO suburbs; $2,300-3,100/month in KC / STL city; $1,700-2,300/month in smaller MO cities.
• What's left for savings, debt service, and discretionary: $2,800-3,500/month in KC / STL suburbs (genuinely substantial); $2,500-3,200/month in KC / STL city; $3,200-4,000/month in smaller MO cities. The aspirational maximalist 401(k) + HSA + Roth + MOST 529 playbook works comfortably for $100K MO renters virtually everywhere.

Suburban KC and STL (Lee's Summit / Independence / Chesterfield / Webster Groves), plus smaller MO cities (Springfield / Columbia), give you genuine room to save and max retirement accounts. The Missouri combination of moderate top rate (4.7%) + federal-conforming standard deduction + uniquely generous MOST 529 deduction + low housing cost makes $100K MO one of the most favorable middle-class financial positions in the country.

The order of operations at this income, calibrated to MO's flat-effective rate at $100K + KC/STL earnings tax + the uniquely generous MOST 529 deduction:

• Capture the employer 401(k) match before anything else. If your employer matches 4% of base, that's $4,000/year in free money. Most large MO employers (Oracle KC / Cerner legacy, BJC Healthcare, Edward Jones, Boeing, Anheuser-Busch InBev, Express Scripts / Cigna Group, Centene, H&R Block, Hallmark Cards) match 4-6%. Fix this pay period if you're not capturing the full match.
• MAX MOST 529 (Missouri's Education Savings Program) if you have kids — uniquely generous. MO offers a state-tax deduction up to $8,000 single / $16,000 MFJ per filer annually (NOT per beneficiary — unlike WI / NY / IL which are per-beneficiary). At MO's 4.7% top rate, that's $376-752/year in MO tax saved. Among the more generous 529 deductions in the country. Front-load if you have school-age kids.
• Beyond the match, max your 401(k) ($24,500 in 2026 employee limit). MO conforms to federal pre-tax 401(k) treatment, so deferrals reduce both federal and MO taxable income. At the 22% federal + 4.7% MO marginal rate, a $24,500 contribution saves about $6,504 in combined tax — $5,390 federal and $1,114 MO — for a net cash cost of $17,996. The MO share lands just under 4.7% of the contribution because Missouri's federal-tax deduction shrinks as your federal tax falls.
• Max your HSA if you have an HDHP ($4,400 single in 2026, per Rev. Proc. 2025-19). MO conforms to federal HSA pre-tax treatment. Combined federal + MO tax savings ~$1,168.
• Roth IRA ($7,500/year, $8,600 if 50+). At $100K you're below the direct Roth phase-out ($168K single for 2026) so contribute directly without the backdoor maneuver.
• Choose your KC / STL residence wisely — the 1% earnings tax applies to BOTH residents AND non-resident workers crossing in. Suburban MO residence + suburban MO workplace = zero earnings tax. KC city residence OR workplace = $1,000/year earnings tax. The structural workaround is straightforward for those with location flexibility.
• Federal income tax deduction — a percentage, not a flat cap: Missouri lets you deduct part of the federal income tax you paid, and the share is set by your Missouri adjusted gross income. Form MO-1040 Line 12: 35% at $25,000 or less, 25% to $50,000, 15% to $100,000, 5% to $125,000, and 0% at $125,001 or more. Only then does the $5,000 single / $10,000 MFJ ceiling apply — on wage income it never binds. At $100K with $13,170 federal tax you deduct 15%, so $1,976 rather than $5,000, worth about $93/year against the 4.7% top rate. It is worth MORE at lower incomes, not higher: above $125,001 of Missouri AGI the deduction is zero.
• Public pension exemption (trajectory planning): MO substantially exempts public pensions (federal civil service, military, MO state, local) for retirees under specific income thresholds. SS exempt for filers under $85K single / $100K MFJ AGI. Material for retirement-trajectory planning.
• No reciprocity awareness: unlike IN / OH / PA / VA, MO has NO state-to-state reciprocity agreements. Cross-border workers (IL-MO, KS-MO especially in KC metro) file two-state returns annually. Plan for the additional filing complexity.

If you're tight: capture the employer match and choose a suburban MO residence + workplace to skip the KC / STL earnings tax entirely. If you have kids, MAX MOST 529 contributions — among the most generous 529 deductions in the country at $8K/$16K per filer. The three moves combined capture significant tax-advantaged value at moderate cost-of-living MO.