To settle financial accounts or debts specifically after the autumn harvest has been completed.

以前的佃农通常要等到秋后算帐，才能交清一年的地租。

verb · To bide one's time for revenge or wait until a favorable moment to retaliate for past grievances.

虽然这件事情暂时平息了，但他一直担心对方会秋后算帐。