The Lao Dong Newspaper Legal Consulting Office replied:
Article 5 of Circular 21/2025/TT-BGDDT of the Ministry of Education and Training (effective from September 23, 2025) stipulates overtime wages as follows:
1. The salary for 01 teaching period of a teacher is determined as follows:

2. Salary for 01 extra teaching period = Salary for 01 teaching period x 150%.
3. Salary for extra teaching hours/school year = Number of extra teaching hours/school year x Salary for 01 extra teaching session.
4. The overtime salary for teachers prescribed in Clause 2, Article 2 of this Circular shall comply with the provisions on overtime salary of the law on labor.
Thus, from September 23, 2025, teachers' overtime teaching salaries are calculated as above.
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