One has to research on how you earn your in income. CO has a state income tax and Texas does not. As seniors we are much less of consumers then when we where younger. Therefore, sales tax means less to us. Our income comes from SS and an IRA. I could not imagine our $124,800 annual income being subject to a 9% state income tax! Real estate taxes in Texas have a good homestead exemption and school taxes, by far the biggest of our real estate taxes, are caped at your 65th birthday. Its Texas for us! Florida also has no state income tax and generous exemptions for seniors but the cost of real estate is very high when compared to Texas.