Under fixed capital, as the name suggests, the opening and closing balance of the capital remains fixed in the 'Capital Account'. All other items like drawings, interest on capital, interest on drawings, partners salary etc. are recorded in a separate account called the 'Current Account'. The 'Capital Account' under fixed method remains unaltered except in the case of
(1) permanent withdrawl of capital (NOT drawings)
(2) additional contribution of capital
Fluctuating method, is the one which consists only one account i.e., 'Capital Account'. All items are posted in the same account. As a result, the opening and closing balance of the account is likely to change/fluctuate.
It should br remembered that the total of Capital + Current Account (fixed method) = Capital Account (fluctuating method).
Another point of remembrance is that in the fixed method, Capital Account shall always have a credit balance, whereas, the Current Account can have both debit or credit balance.