Interest Rate July - December 2018 Memorandum (2018) Associated Files 2018_interest_rate_memo.pdfPDF • 70.69 KBDownload Details Attached is a memorandum from Ronald G. Penny, Secretary of Revenue, establishing the interest rate for July 1, 2018 through December 31, 2018. This resource is related to:Property TaxTax Rate Charts Last updated: May 30, 2018 First published: May 30, 2018