Texas Tax Code - TAX § 33.01. Penalties and Interest

(a) A delinquent tax incurs a penalty of six percent of the amount of the tax for the first calendar month it is delinquent plus one percent for each additional month or portion of a month the tax remains unpaid prior to July 1 of the year in which it becomes delinquent. However, a tax delinquent on July 1 incurs a total penalty of twelve percent of the amount of the delinquent tax without regard to the number of months the tax has been delinquent. A delinquent tax continues to incur the penalty provided by this subsection as long as the tax remains unpaid, regardless of whether a judgment for the delinquent tax has been rendered.

(b) If a person who exercises the split-payment option provided by Section 31.03 of this code fails to make the second payment before July 1, the second payment is delinquent and incurs a penalty of twelve percent of the amount of unpaid tax.

(c) A delinquent tax accrues interest at a rate of one percent for each month or portion of a month the tax remains unpaid. Interest payable under this section is to compensate the taxing unit for revenue lost because of the delinquency. A delinquent tax continues to accrue interest under this subsection as long as the tax remains unpaid, regardless of whether a judgment for the delinquent tax has been rendered.

(d) In lieu of the penalty imposed under Subsection (a), a delinquent tax incurs a penalty of 50 percent of the amount of the tax without regard to the number of months the tax has been delinquent if the tax is delinquent because the property owner received an exemption under:

(e) A penalty imposed under Subsection (d) does not apply if:

(f) Notwithstanding the other provisions of this section, a delinquent tax for which a person defers payment under Section 31.02(b) that is not paid on or before the date the deferral period prescribed by that subsection expires: