Mastercard Software Engineer Salary in O'Fallon 2026
The median H-1B offered wage for a Software Engineer at Mastercard in O'Fallon, MO is $112K/year, across 760 certified LCA filings, 2.2% below the company's $115K nationwide median for this role.
O'Fallon vs. Mastercard Nationwide
| Scope | Median Offered Wage | Certified Filings |
|---|---|---|
| O'Fallon, MO worksite | $112K | 760 |
| All Mastercard US worksites | $115K | 1,154 |
Both figures are medians of the annual offered wage stated in certified DOL Labor Condition Applications for Software Engineer roles at Mastercard. Median is used rather than an average because a small number of outlier filings can skew an average heavily.
DOL Wage Levels, Mastercard Software Engineer
Wage-level distribution across all Mastercard Software Engineer filings nationwide. Since February 27, 2026, USCIS weights the H-1B lottery by DOL wage level, so the level a role is filed at affects selection odds.
| DOL Wage Level | Certified Filings | Share | Lottery Entries |
|---|---|---|---|
| Level I | 37 | 3.2% | 1× |
| Level II | 544 | 47.1% | 2× |
| Level III | 450 | 39.0% | 3× |
| Level IV | 123 | 10.7% | 4× |
Entry weights reflect the DHS wage-weighted selection rule effective February 27, 2026. USCIS has not published official aggregate selection-rate percentages by wage level, so none are stated here.
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Wage data aggregated from DOL LCA disclosure files, filtered to certified petitions with annual wages between $30K and $1M. City figure covers 760 certified Software Engineer filings at Mastercard with a O'Fallon, MO worksite; company-wide figure covers 1,154 filings across all US worksites. LCA wages reflect base salary only, not equity or bonus.