From Longman Business Dictionaryratablerat‧a‧ble /ˈreɪtəbəl/ (also rateable British English) adjective1FINANCE a ratable share of something such as a payment is calculated according to the amount someone owes or is owed, relative to the amounts other people owe or are owedthe collection and ratable distribution of the bankrupt’s available assetsEach insurer is only liable to contribute its rateable proportion.2TAX something that is ratable can have tax charged on ita ratable estate