Abstract The present study discusses how experienced raters use different types of scales to assess the development of oral proficiency in English as a second language (L2). Raters assigned rates to speech samples first using a holistic scale (CEFR, 2018) and then assigning rates for pronunciation, vocabulary, grammar and fluency performance using individual scales. The speech samples were recorded by five Brazilians. There were two data collection sessions, with the second one occurring 7-8 months after the first one. The results indicate high levels of agreement among raters for all scales. Furthermore, the raters detected changes in speakers’ performance in four out of five scales: L2 oral proficiency, vocabulary, grammar, and fluency, and these differences in rates across time were significant for oral proficiency, vocabulary, and fluency. Thus, the different types of scale allow detecting L2 oral proficiency development.