Kent County Council has announced.
The passes will be able to be used on services provided by Stagecoach, Arriva, Go Coach and Nu-Venture.
Holders of a senior citizen and disabled bus pass were previously able to travel for free on buses after 9.30 am, but following discussions with these operators, this condition has been removed.
This change will come into force immediately from Thursday 19th March.
Kent County Council has a statutory duty to provide passes for free bus travel throughout England for older and disabled people under the English National Concessionary Travel Scheme (ENCTS).
Over 250,000 people in the county have a bus pass, with around 227,000 for older people and 22,000 for disabled people.