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August 2026

Discounts Allowed Explained: Code 4009

Most sales codes build up a credit balance as income comes in, but discounts work the opposite way — they reduce the value of sales, so this one code deliberately runs against the grain of the rest of the Sales section.

What this code holds

Code 4009 — Discounts Allowed records discounts given to customers, such as an early payment discount or a negotiated price reduction. Because it reduces the value of sales rather than adding to it, it's a contra-income account and normally carries a debit balance — the opposite of a typical Sales code.

Real-world examples across industries

Wholesale, prompt-payment terms

A wholesaler operates "2%-10-net-30" terms — 2% off if the customer pays within 10 days rather than the full 30. The original invoice is raised in full through the normal Sales codes; if the customer pays early and takes the discount, the wholesaler issues a credit note for the £20 discount plus £4 VAT on it, since HMRC treats output tax as due only on the amount actually received once a prompt-payment discount is taken up. The entry is a debit of £20 to 4009 (Discounts Allowed), a debit of £4 to 2200 (Sales Tax Control Account), and a credit of £24 to 1100 (Debtors Control Account).

Service business, goodwill credit

A design agency rarely offers formal settlement discounts, but will sometimes issue a goodwill credit note after a dispute over scope or delivery. A £300 (£250 net) goodwill reduction on a client's invoice is a debit of £250 to 4009, a debit of £50 to 2200, and a credit of £300 to 1100 — mechanically identical to the wholesaler's settlement discount above, just triggered by a service issue rather than a payment-speed incentive. Discounts agreed up front and simply netted off an invoice before it's raised never touch 4009 at all; the code only comes into play once a separate credit note is issued against an invoice already on the books.

Why this matters day to day

Recording discounts separately rather than simply reducing the original sales figure means the business can still see its full, undiscounted sales value alongside how much it's giving away in discounts — useful for judging whether an early payment incentive is actually worth offering. It also keeps the original invoice figures intact for VAT and customer statement purposes.