Can a Texas landlord increase rent retroactively?
No. A rent increase in Texas only takes effect on or after the effective date stated in the notice, and only if the advance notice period was met (Texas has no statewide statutory advance notice for rent increases. Lease terms govern. Default practice is 30 days written notice on a month-to-month tenancy, matching the Tex. Prop. Code 91.001 termination rule. No state rent cap, and local rent control is preempted.). A landlord cannot demand back-dated rent at a higher rate for past months. Doing so makes the increase void as to the back-dated period. The tenant continues to owe the original rent for any month already in progress when the notice was served.
Source: Lease-based; Tex. Prop. Code 91.001 (30-day month-to-month termination default)
This is an informational answer based on Lease-based; Tex. Prop. Code 91.001 (30-day month-to-month termination default) as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled or rent-stabilized cities) can override or add to state law. For contested cases, consult a Texas-licensed attorney.