Pay Taxes Online As a customer service to McLennan County Taxpayers, McLennan County Tax Assessor-Collector Randy Riggs is pleased to provide the following options to pay their Real Estate and Personal Property tax online. Accepted are: Visa, MasterCard, Discover and American Express. Pay by Credit Card or E-Checking A convenience fee of 2.19% and a $1.50 flat fee for electronic check will be applied and paid directly to Certified Payments. To pay your Tax Bill you will need: E-Checking: Property tax account number and Bank account information. Credit Card: Property tax account number and Bureau Code 7575130. Visa, Mastercard, Discover, and American Express are accepted.