Previous research has raised concerns that equity may be compromised in content and language integrated learning (CLIL) education, creating schisms in otherwise fairly egalitarian education systems. In Andalusia (southern Spain), where bilingual education has expanded, this article aims to analyze the difference between CLIL bilingual education and traditional monolingual education in terms of student equity indicators. A sample of over 3,800 students representing the four socioeconomic status (SES) levels (SES 1-4), selected by stratified random sampling, was analyzed with correlational statistics to determine their performance levels at CLIL and non-CLIL schools, according to their competence in Spanish L1, English L2, and history. Results point to certain egalitarian effects of CLIL education: while a staircase pattern is constantly present in the performance of non-CLIL students (with those from higher social classes obtaining better results), all CLIL students seem to obtain equally high results regardless of their SES.