There isn't a specified time limit for applying for council tax discounts in Tonbridge and Malling stated in the information available. However, if you wish to backdate a council tax reduction, there are specific conditions: you must demonstrate a good cause for not applying sooner. This allows for backdating up to one month for working-age individuals and three months for those of pensionable age.
For more details or to apply for discounts, you can click here. Always best to apply as soon as you believe you're eligible!