This cross-sectional study examined the effects of English language proficiency on Jordanian EFL students' production and comprehension of apology strategies. The participants were 270 Jordanian EFL learners and 90 native speakers of English. Data were collected using Written Discourse Completion Test (WDCT) and Multiplechoice Discourse Completion Test (MDCT). Descriptive statistics and the Spearman rank-order correlation coefficient (rho) test were used to analyse the data. Results showed that Jordanian EFL learners' production and comprehension of apology strategies are influenced by their levels of English language proficiency. A small to large negative correlation relationship was reported between Jordanian EFL learners' language proficiency and the production of explicit apology strategies and non-apology strategies. On the other hand, the study revealed a small to medium positive correlation relationship between Jordanian EFL learners' language proficiency and the production of less-explicit apology. The study also showed a significant correlation relationship between proficiency and the comprehension of apology strategies. Thus, teachers of English at Jordanian schools may need to consider focusing on classroom activities that can help EFL learners enhance their pragmatic knowledge of apology strategies.