601. IMPOSITION OF PENALTIES AND INTEREST CHARGES.

The following civil penalties and interest charges are imposed with respect to all taxes levied pursuant to this Code:

1. Penalty for late filing of any form or return: 5% of net tax due, per month or portion thereof, up to a maximum of 25% of net tax due, but not less than $25, in addition, to any other penalties and any interest charges imposed pursuant to this Chapter.
2. Penalty for late payment or underpayment of any tax: 1% of net tax due, per month or portion thereof, up to a maximum of 25% of net tax due, in addition to any other penalties and any interest charges imposed pursuant to this Chapter.
3. Penalty for willful failure to file any form of return or to pay any tax when due, or willful filing of a frivolous form or return: 25% of net tax due or $250, whichever is greater, in addition to any other penalties and any interest charges imposed pursuant to this Chapter.
4. Penalty for willful misrepresentation which results in underpayment of any tax, or any other act of fraud: 50% of net tax due or $500, whichever is greater, in addition to any other penalties and any interest charges imposed pursuant to this Chapter.
5. Interest on all late payments and underpayments: 1-1/2% of net tax due per month or any portion thereof.
6. Attorney’s fees and costs incident to any administrative or judicial proceeding brought to enforce the provisions of this Code.