Code 310: penalty for failure to report income from tips.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Debit. Used on individual (IMF) accounts.
Penalty for Failure to Report Income from Tips
The full Document 6209 entry, as printed
Debit (NPJ) I Penalty for Failure to Report Income from Tips 47, 54 Assesses penalty for taxpayer’s failure to report Tips Income.
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Questions people ask
What does code 310 mean on my IRS transcript?
Document 6209 calls it "Penalty for Failure to Report Income from Tips".
Sources
Checked against these sources on October 30, 2026.