If your age plus your years of eligible service credit equal 80, you can retire under the "Rule of. 80. What age can you retire in Houston?At the end of each year, we'll mail you a Social Security. Benefit Statement (Form SSA-1099) that shows the amount of benefits you received. Your retirement date must be the last day of the month and cannot precede the termination of your city employment. Complete your retirement packet. There is no state income tax in Texas, which means Social Security retirement benefits and all other types of retirement income are tax-free. Most retirement savings plans like 401(k)s can be divided on divorce no matter the length of the marriage. We Do Retirement Right. Kreig LLC is a Houston-based probate law firm serving beneficiaries and executors of estates throughout Texas.