Are there any additional costs other than fines?
Yes. Any conviction for DWI in Texas carries with it a DPS license surcharge that applies for three years after a DWI conviction. Currently the surcharge is $1,000 for a first offense, $1,500 per year for a subsequent DWI conviction and $2,000 each year for someone who registered over .16 or more on a chemical test on their current DWI conviction.
Probation fees and related expenses on a standard one-year probation can total well over $500. Currently, court costs in Harris County for a first DWI is $240. More fees will apply in the event your license is suspended at an Administrative License Revocation (ALR) hearing or if you are required to obtain an occupational license. A first time DWI conviction can conservatively cost you more than $6,000, and that doesn’t even take into account the increase in your auto insurance!