Sales, Purchases, and Tax on Transactions

Learning objectives

By the end of this chapter you should be able to:

• Record credit sales and credit purchases, including VAT and the effect of trade and settlement discounts.
• Calculate VAT correctly on net amounts and explain how output VAT and input VAT move through the ledger.
• Post and interpret sales and purchase returns using credit notes.
• Reconcile customer and supplier balances by matching external statements to the relevant individual ledger accounts, and explain common timing differences.
• Prepare accurate journal entries for sales, purchases, returns, payments, and discounts, and explain the impact on assets, liabilities, income, and expenses.

Overview & key concepts

Many businesses buy and sell on credit. That creates two central balances:

• Trade receivables: amounts customers owe the business.
• Trade payables: amounts the business owes suppliers.

When VAT applies, the business records VAT separately from income and expenses:

• Output VAT(on sales) is collected on behalf of the tax authority and is normally aliability.
• Input VAT(on purchases) is normallyrecoverableand is usually anasset. Some input VAT may beirrecoverable/blocked or restricted(rule- and industry-dependent). Any irrecoverable element is treated as part of the related cost.

Discounts and returns are common adjustments and must be treated carefully:

• Trade discountsreduce the selling price immediately and are recorded only through thenet invoice value.
• Settlement discounts(prompt payment discounts) are recordedonly when payment is madeand the discount is actually taken.
• Returnsare recorded usingcredit notesand reverse part of the original sale or purchase (including the related VAT).

A consistent net/VAT/gross approach prevents the most common errors: calculating VAT on the wrong base, forgetting VAT adjustments after later changes, and reconciling the wrong balances.

Core theory and frameworks

1) Net, VAT, and gross

For VAT-registered businesses, most invoices are analysed as:

• Net value(value of goods/services)
• VAT(net × VAT rate)
• Gross(net + VAT)

Trade discounts are applied before VAT. VAT is calculated on the net amount after any trade discount.

2) Mini “ledger flow” checkpoint

Think of the typical sequence in three steps:

• Invoice→ recognisereceivable/payable (gross)and postVATto the VAT ledger account(s).
• Credit note→reversethe relevant part of the receivable/payable andreversethe related VAT.
• Settlement→ clear the balance; if a settlement discount is taken, recognise the discount andadjust VATso the VAT posted reflects the final consideration.

3) Recording credit sales

A credit sale increases receivables and recognises revenue, while also creating output VAT payable.

Example (credit sale): net £1,000, VAT 20%

• Net: £1,000
• VAT: £200
• Gross receivable: £1,200

Journal entry

Dr Trade receivables 1,200
Cr Sales (revenue) 1,000
Cr Output VAT 200

Accounting equation impact

• Assets increase (receivables).
• Liabilities increase (output VAT).
• Equity increases via profit (revenue increases profit, before costs).

4) Recording credit purchases

A credit purchase increases payables and records the related cost, with input VAT recoverable (to the extent permitted).

Whether the debit goes to Purchases, Inventory, or another cost category depends on what is being bought and how the question is set up.

Exam approach (one rule): follow the account headings given. If the question uses Purchases/Purchase returns, post there. If it uses Inventory/Cost of sales, post accordingly.

Example (credit purchase): net £500, VAT 20%

• Net: £500
• VAT: £100
• Gross payable: £600

Journal entry

Dr Purchases (or Inventory) 500
Dr Input VAT 100
Cr Trade payables 600

If any input VAT is irrecoverable, that irrecoverable amount is added to the cost (for example, added to Purchases/Inventory rather than posted to Input VAT).

5) Returns and credit notes

Returns reduce the original transaction. A credit note reverses part of the net amount and the related VAT.

Sales return (customer returns goods)
This reduces sales (via Sales returns) and output VAT, and reduces the receivable.

Example: net return £200, VAT 20%

Dr Sales returns 200
Dr Output VAT 40
Cr Trade receivables 240

Purchase return (business returns goods to supplier)
This reduces purchases (via Purchase returns) and input VAT, and reduces the payable.

Example: net return £200, VAT 20%

Dr Trade payables 240
Cr Purchase returns 200
Cr Input VAT 40

6) Trade discounts vs settlement discounts

Trade discounts

• Given at the point of sale (often based on volume or customer type).
• Not recorded separately; transactions are recorded at thediscounted netamount and VAT is calculated on that discounted net amount.

Settlement discounts (prompt payment discounts): VAT rule and practical nuance

A settlement discount is a reward for paying early. You do not assume it will happen when the invoice is raised; you record it only when payment is made and the discount is actually taken.

For VAT purposes, the VAT recognised should reflect the final consideration actually paid/received. In practice, invoicing terms matter: where discount terms are clearly stated on the invoice (as is common in the UK), VAT is ultimately based on the amount actually paid.

Different VAT systems can handle early-payment discounts differently; in this chapter we follow the common UK approach used in exam-style questions, where VAT is aligned to the final amount paid/received when discount terms are stated.

Important calculation note (net-based vs gross-based discounts)

• In many questions, the settlement discount is quoted as apercentage of the netamount. VAT on the discount is thennet discount × VAT rate(as in the worked example).
• If a settlement discount is quoted on thegrossamount, the VAT element of that gross discount is found using theVAT fraction(for 20% VAT, VAT is1/6of the gross discount), not “gross × 20%”.

Customer takes a settlement discount (discount allowed)
Dr Bank (cash received)
Dr Discount allowed
Dr Output VAT (reduce VAT liability)
Cr Trade receivables (clear the amount due)

Business receives a settlement discount (discount received)
Dr Trade payables (clear the amount due)
Cr Bank (cash paid)
Cr Discount received
Cr Input VAT (reduce VAT recoverable)

7) VAT ledger accounts and net settlement position

Output VAT and Input VAT are often maintained as separate ledger accounts and then netted to a single VAT payable/receivable balance for reporting and settlement.

Over a VAT period:

• Output VAT accumulates as credits (liability).
• Input VAT accumulates as debits (recoverable amount, subject to restrictions).

Checkpoint:

• Ifoutput VAT > input VAT→ overallVAT payable(credit net).
• Ifinput VAT > output VAT→ overallVAT recoverable(debit net).

Returns and settlement discounts adjust VAT ledger accounts so the VAT position reflects the final amounts invoiced and settled.

8) Ledger reconciliations: what is being reconciled

A reconciliation compares an external statement to the relevant individual ledger account.

• Supplier statement reconciliation:supplier statement vs that supplier’strade payablesledger account.
• Customer statement reconciliation:customer statement vs that customer’strade receivablesledger account.

Separately, some systems also reconcile control accounts (total receivables/payables in the general ledger) to the sum of individual ledger balances, where relevant.

Direction of reconciliation (exam technique): start with either the statement balance or the ledger balance (as instructed), then list reconciling items to arrive at the other balance.

Common reconciling items include:

• Invoices/credit notes recorded by one party but not yet recorded by the other (timing).
• Payments in transit (paid but not yet received/allocated).
• Items posted to the wrong account, wrong amount, or wrong VAT.
• Disputed items awaiting correction.

A good reconciliation explains each difference clearly and shows the corrected balance that should agree once missing items are posted.

Worked example

Narrative scenario

Swift Supplies (UK) records the following transactions. VAT is 20%.

Sales to a customer (Alder Ltd)

• 6 March: Swift Supplies sells goods on credit to Alder Ltd. List price £3,000 with a 10% trade discount.
• 10 March: Alder Ltd returns goods worth £300 (net).
• 15 March: Alder Ltd settles the remaining balance and takes a 2% settlement discount.

Purchases from a supplier (Northbank Traders)

• 10 April: Swift Supplies buys goods on credit from Northbank Traders, net £1,500.
• 15 April: Swift Supplies returns goods worth £200 (net).
• 20 April: Swift Supplies settles the remaining balance and receives a 2% settlement discount.

Required

1. Calculate VAT and gross amounts for each invoice/credit note and for each settlement.
2. Prepare journal entries for each transaction.
3. Reconcile the customer and supplier ledger balances.
4. Identify and correct any misclassifications.
5. Describe the impact on the financial statements.

Solution

Transaction 1: Credit sale to Alder Ltd (6 March)

Step 1: Calculate invoice values

• Trade discount = £3,000 × 10% = £300
• Net sales value = £3,000 − £300 =£2,700
• VAT (20%) = £2,700 × 20% =£540
• Gross receivable = £2,700 + £540 =£3,240

Journal entry (using Sales and Output VAT)

Dr Trade receivables (Alder Ltd) 3,240
Cr Sales (revenue) 2,700
Cr Output VAT 540

Transaction 2: Sales return from Alder Ltd (10 March)

Step 1: Calculate credit note values

• Net return =£300
• VAT reduction = £300 × 20% =£60
• Gross reduction =£360

Journal entry (using Sales returns)

Dr Sales returns 300
Dr Output VAT 60
Cr Trade receivables (Alder Ltd) 360

Balance after return (Alder Ltd)
Gross receivable outstanding = £3,240 − £360 = £2,880

Transaction 3: Settlement by Alder Ltd with settlement discount (15 March)

Step 1: Identify the remaining net and VAT before settlement

• Remaining net = £2,700 − £300 =£2,400
• Remaining VAT = £540 − £60 =£480
• Remaining gross receivable =£2,880

Step 2: Calculate settlement discount and VAT adjustment (net-based discount in this question)

• Settlement discount on net = £2,400 × 2% =£48
• VAT reduction on discount = £48 × 20% =£9.60
• Total reduction in amount payable = £48 + £9.60 =£57.60
• Cash received = £2,880 − £57.60 =£2,822.40

Journal entry (using Discount allowed)

Dr Bank 2,822.40
Dr Discount allowed 48.00
Dr Output VAT 9.60
Cr Trade receivables (Alder Ltd) 2,880.00

Customer ledger check (Alder Ltd)
Invoice 3,240
Less credit note (360)
Balance 2,880
Settled by: cash 2,822.40 + discount/VAT adj 57.60 = 2,880
Closing balance: nil

Transaction 4: Credit purchase from Northbank Traders (10 April)

Step 1: Calculate invoice values

• Net purchases value =£1,500
• VAT (20%) = £1,500 × 20% =£300
• Gross payable =£1,800

Journal entry (using Purchases)

Dr Purchases 1,500
Dr Input VAT 300
Cr Trade payables (Northbank Traders) 1,800

Transaction 5: Purchase return to Northbank Traders (15 April)

Step 1: Calculate credit note values

• Net return =£200
• VAT reduction = £200 × 20% =£40
• Gross reduction =£240

Journal entry (using Purchase returns)

Dr Trade payables (Northbank Traders) 240
Cr Purchase returns 200
Cr Input VAT 40

Balance after return (Northbank Traders)
Gross payable outstanding = £1,800 − £240 = £1,560

Transaction 6: Settlement with Northbank Traders including settlement discount (20 April)

Step 1: Identify the remaining net and VAT before settlement

• Remaining net = £1,500 − £200 =£1,300
• Remaining VAT = £300 − £40 =£260
• Remaining gross payable =£1,560

Step 2: Calculate settlement discount and VAT adjustment (net-based discount in this question)

• Settlement discount on net = £1,300 × 2% =£26
• VAT reduction on discount = £26 × 20% =£5.20
• Total reduction in amount payable = £26 + £5.20 =£31.20
• Cash paid = £1,560 − £31.20 =£1,528.80

Journal entry (using Discount received)

Dr Trade payables (Northbank Traders) 1,560.00
Cr Bank 1,528.80
Cr Discount received 26.00
Cr Input VAT 5.20

Supplier ledger check (Northbank Traders)
Invoice 1,800
Less credit note (240)
Balance 1,560
Settled by: cash 1,528.80 + discount/VAT adj 31.20 = 1,560
Closing balance: nil

VAT position from these transactions (illustrative)

Output VAT movements:

• From sale: 540.00 (credit)
• Less return: 60.00 (debit)
• Less settlement VAT adjustment: 9.60 (debit)
• Net output VAT=£470.40

Input VAT movements:

• From purchase: 300.00 (debit)
• Less return: 40.00 (credit)
• Less settlement VAT adjustment: 5.20 (credit)
• Net input VAT=£254.80

Checkpoint: output VAT exceeds input VAT, so there is a net VAT payable.

Net VAT payable = £470.40 − £254.80 = £215.60
(assuming no other VAT transactions in the period)

Impact on the financial statements

Statement of profit or loss (effects from these transactions)

Sales side:

• Revenue recognised (net): £2,700
• Sales returns: £300 (reduces revenue overall)
• Discount allowed: £48 (commonly shown either as a separate expense line or deducted from revenue—apply the policy consistently)

Purchase side:

• Purchases (net): £1,500
• Purchase returns: £200 (reduces purchases overall)
• Discount received: £26 (commonly shown as other income or as a reduction of the related cost—apply the policy consistently)

VAT is excluded from revenue and expenses because it is collected/paid on behalf of the tax authority (subject to recoverability restrictions for input VAT).

Statement of financial position (key movements)

• Trade receivables rise on invoicing and fall on credit notes and settlement; here the customer balance returns to nil.
• Trade payables rise on supplier invoicing and fall on credit notes and settlement; here the supplier balance returns to nil.
• Output VAT and input VAT are netted to determine whether there is a VAT payable (liability) or VAT recoverable (asset).

Common pitfalls and misunderstandings

• Using the list price instead of the trade-discounted price for VAT: VAT is calculated on the net amount after trade discounts.
• Applying settlement discounts to the wrong base: calculate the discount on the net outstanding after returns/adjustments, not on the original invoice totals.
• Forgetting the VAT adjustment on settlement discounts: VAT ledger accounts must be adjusted so VAT reflects the final consideration.
• Using the wrong method for gross-based discounts: if the discount is stated on the gross amount, extract VAT using the VAT fraction (at 20%, VAT is 1/6 of the gross discount).
• Reversing returns incorrectly: sales returns reduce receivables; purchase returns reduce payables. Both reverse the related VAT.
• Assuming all input VAT is recoverable: where VAT is blocked or restricted, the irrecoverable amount is treated as part of the cost.
• Reconciling the wrong thing: reconcile the supplier’s statement to that supplier’s trade payables account (and the customer’s statement to that customer’s trade receivables account). Control account reconciliations are a separate check.
• Mixing purchases and inventory treatment: post to the headings used in the question and keep the approach consistent throughout.

Summary and further reading

Sales, purchases, and VAT transactions drive core ledger balances and must be recorded with disciplined analysis into net, VAT, and gross. Trade discounts affect the invoice value immediately and are built into the net figure. Returns are recorded through credit notes, reversing both the net amount and VAT. Settlement discounts are recorded only when taken and require a related VAT adjustment so VAT reflects the final amount paid/received.

This topic supports later work on receivables management, payables management, bank reconciliation, inventory and cost of sales, and indirect tax ledger accounts.

FAQ

How do trade discounts differ from settlement discounts?

A trade discount changes the agreed selling price at the point the invoice is raised, so it is reflected in the invoice net amount and the VAT calculated. A settlement discount is a later incentive tied to early payment; it is recognised only when payment is made and the discount is actually taken, with VAT adjusted to match the final consideration.

Does VAT affect profit?

VAT does not form part of revenue or expenses for a VAT-registered business that can recover input VAT. VAT affects balances (VAT payable/recoverable) and cash flows. Where input VAT is irrecoverable, that irrecoverable element increases the related cost and can affect profit.

Why must returns include a VAT adjustment?

Because the original invoice included VAT. If a credit note reduces the net amount, the VAT connected to that net amount must also be reduced so the VAT ledger reflects the revised consideration.

What should a customer or supplier reconciliation prove?

It should prove that the ledger balance for a specific customer or supplier can be explained by known timing differences or errors. A good reconciliation identifies each difference and shows the corrected balance that should agree once missing items are posted.

Where do discounts allowed and discounts received appear?

Discounts allowed are commonly shown either as a separate expense line or deducted from revenue; discounts received are commonly shown either as other income or as a reduction of the related cost. The key requirement is consistent policy and clear presentation.

Glossary

Credit sale
A sale where the customer takes delivery now but pays later. It increases trade receivables and recognises revenue at the invoice date.

Credit purchase
A purchase where goods or services are received now but paid for later. It increases trade payables and records the related cost (often through Purchases or Inventory, depending on the question headings).

VAT
An indirect tax added to the net value of many goods and services. A business typically collects VAT on sales and reclaims VAT on purchases, paying or reclaiming the net amount overall (subject to any restrictions).

Output VAT
VAT charged on sales invoices. It is normally owed to the tax authority and therefore increases liabilities.

Input VAT
VAT charged by suppliers on purchase invoices. It is normally recoverable and therefore increases assets, although some input VAT may be blocked or restricted and then treated as part of cost.

Trade discount
A reduction from list price agreed at the point of sale (often for volume or customer category). Transactions are recorded at the discounted net amount; the discount is not usually posted to a separate ledger account.

Settlement discount (prompt payment discount)
A discount offered for early payment and recorded only if the payment terms are met and the discount is taken. It reduces the cash paid/received and requires a related VAT adjustment so VAT reflects the final consideration.

Credit note
A document issued to reduce a previously invoiced amount (commonly for returns). It reduces the receivable or payable and reverses the related VAT.

Reconciliation
A process of matching a specific party’s ledger account to external evidence (such as that party’s statement), explaining differences and correcting errors so balances are reliable.

Tax point
The VAT system needs a date that decides which VAT return period a transaction belongs to. That date is the tax point. In many routine cases it matches the supply or invoice date, but scenarios can specify different timing rules. In exam questions, treat the tax point as “the date that decides the VAT period”, use the basis stated, and apply it consistently.