Antonyms of verb clock_out

1 sense of clock out

Sense 1
clock out, punch out, clock off -- (register one's departure from work)
       Antonym of clock in (Sense 1)
      => clock in, punch in, clock on -- (register one's arrival at work)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb clock_out

1 sense of clock out

Sense 1
clock out, punch out, clock off -- (register one's departure from work)
       => report -- (announce one's presence; "I report to work every day at 9 o'clock")