Interest Rate January - June 2019 (Memorandum 2018) Associated Files interest_rate_memo_january_2019-june_30_2019_.pdfPDF • 80.1 KBDownload Details Attached is a memorandum from Ronald G. Penny, Secretary of Revenue, establishing the interest rate for January 1, 2019 through June 30, 2019. Last updated: Dec 4, 2018 First published: Dec 4, 2018