(a) If on or before September 1 of a taxable year the Department has not notified a county or municipal corporation of any particular personal property assessment, or any operating property assessment, the Mayor and City Council of Baltimore City or the governing body of the county or of the municipal corporation may authorize, by law, the payment of estimated property tax under subsection (b) of this section. (b) (1) The estimated property tax may not exceed the amount calculated by applying the applicable current property tax rate to the most recent assessment of the property. (2) Payment is due 30 days after the tax bill is received or reasonably should have been received or available and if unpaid is subject to interest and penalties as provided by §§ 14-604, 14-608, and 14-702 of this article. (c) If the property tax paid under this section is less than the tax finally determined, the collector shall send a bill to the taxpayer for the difference.
Maryland Legal Code