This study investigates the effectiveness of dynamic written corrective feedback (DWCF) for intermediate learners of Korean as a foreign language (KFL) compared to traditional types of written corrective feedback. DWCF is an innovative method of providing written corrective feedback on students' writing that has primarily been used in English as a second language (ESL) settings. It aims to improve learners' linguistic accuracy and requires multilayered interaction between teachers and students. Although DWCF has been effectively used to increase linguistic accuracy in various ESL settings, it has not yet been widely applied to other language learning settings. This study demonstrates the extent to which DWCF increases the linguistic accuracy of intermediate KFL learners and determines DWCF's impact on fluency and complexity. The treatment group (n = 9) was managed with DWCF and the control group (n = 10) wrote six essays over a 12-week period. The pre- and post-test results were analyzed to determine differences in linguistic accuracy, fluency, and complexity between the two groups. A mixed-model repeated measures ANOVA revealed that the treatment group's accuracy significantly increased compared to the control group, whereas there was no significant difference in fluency or complexity for either group. Limitations and suggestions for future research are discussed in the conclusion.