When interest under Section 234C shall be levied?
​​The interest under Section 234C shall be levied if payment of advance tax in an instalment is less than the prescribed percentage (given in the above table). However, the interest shall be levied if:

Advance tax paid on or before 15th June is less than 12% of the assessed tax.
Advance Tax paid on or before 15th September is less than 36% of the assessed tax.
Advance Tax paid on or before 15th December is less than 75% of the assessed tax.
Advance Tax paid on or before 15th March is less than 100% of the assessed tax.​