Cash receipts and payments involving discounts are entered in

A three-column cash book has three money columns on each side: one for discount, one for cash, and one for bank. This structure allows a business to record cash receipts and payments, bank receipts and payments, and any discount allowed or received, all within the same book, on the same line as the underlying transaction.

Because discounts are recorded in their own dedicated column alongside the cash and bank entries, the three-column cash book is the correct book for transactions that involve both a receipt or payment and an associated discount. A two-column cash book only has cash and bank columns, with no discount column, so discounts cannot be recorded there. An analytical cash book analyses payments or receipts across different expense or income headings rather than tracking discount separately, and a petty cash book is used only for small, day-to-day cash expenses, not for discounts on customer or supplier settlements.

Examination reminder: the presence of a discount column is the defining feature that separates the three-column cash book from the simpler two-column version; look for that column whenever a question mentions discount allowed or discount received.