A trade discount is a reduction in the list price of goods given by a seller to a buyer — usually for bulk purchases or regular business relationships.
It is deducted before recording the transaction in the books of accounts.
That means, goods are recorded in the Purchases or Sales account at the net amount (after trade discount).
Therefore, trade discount is not shown separately in the Profit & Loss Account or Balance Sheet.
Trade discount → Not recorded in books (only shown on invoice).
Cash discount → Recorded in books (appears in P&L Account.