Can a Florida landlord increase rent retroactively?
No. A rent increase in Florida only takes effect on or after the effective date stated in the notice, and only if the advance notice period was met (Florida has no statewide advance notice for rent increases. Fla. Stat. 83.57 (post-HB 1417, effective July 1, 2023) requires 30 days notice to terminate a month-to-month tenancy, which landlords use as the default for rent changes. No state rent cap.). 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: Fla. Stat. 83.57 (30-day month-to-month termination default, post-HB 1417)
This is an informational answer based on Fla. Stat. 83.57 (30-day month-to-month termination default, post-HB 1417) 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 Florida-licensed attorney.