The following rate changes are effective October 1, 2023:

• Alaska changed from 10.50% to 10.75% for both underpayments and overpayments.
• Alabama changed from 7.00% to 8.00% for both underpayments and overpayments.
• Arizona changed from 7.00% to 8.00% for both underpayments and overpayments.
• Federal changed from 7.00% to 8.00% for underpayments and from 6.00% to 7.00% for overpayments.
• Massachusetts changed from 8.00% to 9.00% for underpayments and from 6.00% to 7.00% for overpayments.
• New Mexico changed from 7.00% to 8.00% for both underpayments and overpayments.
• New York City changed from 11.00% to 12.00% for underpayments and from 6.00% to 7.00% for overpayments.
• New York State changed from 11.00% to 12.00% for underpayments and from 6.00% to 7.00% for overpayments.
• South Carolina changed from 7.00% to 8.00% for underpayments and from 4.00% to 5.00% for overpayments.
• Virginia changed from 9.00% to 10.00% for both underpayments and overpayments.

The following rate changes will become effective January 1, 2024:

• Colorado will change from 8.00% to 11.00% for both underpayments and overpayments.
• Maine will change from 7.00% to 10.00% for both underpayments and overpayments.
• New Hampshire will change from 7.00% to 9.00% for underpayments and from 4.00% to 6.00% for overpayments.