According to state law, once the delinquency date has passed, simple interest starts to accrue at 16% per year prorated monthly. Whether paid on the last day of the month or the first day of the month, 1.333% will be due each month on the amount of tax delinquent. After the May 1 delinquent date, if taxes are not paid before the following January, an additional 5% (minimum $5) penalty is assessed. In February, all delinquent taxes will be offered for sale at the annual Tax Lien Sale. This is a sale of the County lien on delinquent parcels - not a sale of property. Once a property is in the tax lien sale it is considered a "back tax parcel". After 3 years from the date of the tax lien sale, the purchaser of the tax lien can foreclose on the lien and acquire the property.