6.2 Closing Inventory Valuation & IAS 2 Rules

Closing Inventory Valuation & IAS 2 Rules

In businesses that trade in physical goods or manufacture products, inventory (formerly termed stock) represents one of the largest and most critical current assets on the Statement of Financial Position (SFP). Furthermore, because closing inventory directly offsets cost of goods available for sale, its monetary valuation exerts an immediate, pound-for-pound effect on Gross Profit and Net Profit in the Statement of Profit or Loss (SPL).

Within AAT Level 3 Financial Accounting: Preparing Financial Statements (FAPS), the valuation and accounting treatment of inventory are governed by IAS 2 (Inventories) and mirrored in UK GAAP under FRS 102 (Section 13).

1. The Fundamental Valuation Rule: Lower of Cost and Net Realisable Value

The cornerstone requirement of IAS 2 is:

Core Rule (IAS 2.9): Inventories shall be measured at the lower of Cost and Net Realisable Value (NRV).

This rule is a direct embodiment of the Prudence concept (exercising caution under uncertainty) and the Accruals concept:

• If expected net revenue exceeds cost, profits are not anticipated before sale; inventory remains recorded at historical Cost.
• If expected net realisable proceeds fall below cost, the anticipated loss must be recognized immediately in the current period by writing down the inventory to NRV.

┌─────────────────────────────────────────────────────────────────────────────┐
│                     IAS 2 INVENTORY VALUATION MATRIX                        │
├─────────────────────────────────────────────────────────────────────────────┤
│                                 INVENTORY                                   │
│                                     │                                       │
│                  ┌──────────────────┴──────────────────┐                    │
│                  ▼                                     ▼                    │
│              COST PRICE                      NET REALISABLE VALUE           │
│     (All costs to bring item to        (Estimated Selling Price less        │
│      present location & condition)      Costs to Complete & Costs to Sell)  │
│                  │                                     │                    │
│                  └──────────────────┬──────────────────┘                    │
│                                     ▼                                       │
│                        Select the LOWER Figure                              │
│                     (Applied on Item-by-Item Basis)                         │
└─────────────────────────────────────────────────────────────────────────────┘

The Item-by-Item Valuation Rule

IAS 2 mandates that the comparison between Cost and NRV must be applied item-by-item (or line-by-line for groups of substantially identical items). It is strictly prohibited to compare the aggregate total cost of all inventory against the aggregate total NRV.

Why Aggregate Valuation is Prohibited:

• Aggregating total cost and total NRV allows unrealized profits on profitable stock lines to offset and conceal real losses on damaged or obsolete stock lines, directly violating prudence.

• Analysis: Under IAS 2 item-by-item rules, closing inventory is valued at £38,700, requiring an immediate write-down expense of £6,300 (£45,000 − £38,700). Under the prohibited aggregate method, the inventory would be reported at £45,000, concealing £6,300 of losses!

2. Determination of Cost under IAS 2

Under IAS 2, the cost of inventory comprises all costs of purchase, costs of conversion, and other costs incurred in bringing the inventories to their present location and condition.

A. Costs Included in Inventory Valuation (Capitalised)

1. Purchase Costs: Gross invoice price minus trade discounts, rebates, and settlement allowances.
2. Import Duties & Non-Recoverable Taxes: Customs duties and tariffs paid on imported goods (excluding recoverable input VAT).
3. Carriage Inwards (Freight-In): Transport and shipping charges incurred to deliver purchased inventory to the entity's premises/warehouse.
4. Handling & Clearing Costs: Port handling fees, offloading, and direct receiving costs.
5. Costs of Conversion (for Manufacturers):
   • Direct Materials & Direct Labour: Wages of factory operatives directly working on production.
   • Allocated Production Overheads: Systematic allocation of fixed factory overheads (depreciation of factory machinery, factory rent, factory supervisor salaries based on normal operating capacity) and variable production overheads (factory power, lubricants).

B. Costs Strictly Excluded from Inventory Valuation (Expensed to SPL)

Under IAS 2, the following expenditures must never be capitalised into inventory cost; they must be charged as operating expenses in the SPL in the period incurred:

1. Abnormal Waste: Abnormal quantities of wasted materials, idle labour time, or manufacturing inefficiencies.
2. Storage Costs: General warehouse storage costs for finished goods after production is complete (storage is capitalised only if necessary during a production process, such as maturing cheese or wine).
3. Administrative Overheads: Head office salaries, general legal fees, IT, and accounting costs that do not contribute to bringing inventory to its present location/condition.
4. Selling & Distribution Costs: Advertising, sales staff commissions, showroom expenses, and Carriage Outwards (freight delivery charges to customers).

┌─────────────────────────────────────────────────────────────────────────────┐
│                     CARRIAGE INWARDS vs. CARRIAGE OUTWARDS                  │
├──────────────────────────────────────┬──────────────────────────────────────┤
│ CARRIAGE INWARDS (Freight-In)        │ CARRIAGE OUTWARDS (Freight-Out)      │
├──────────────────────────────────────┼──────────────────────────────────────┤
│ • Cost of transporting goods FROM    │ • Cost of delivering goods TO        │
│   suppliers INTO our warehouse       │   customers                          │
│ • INCLUDED in Cost of Inventory      │ • EXCLUDED from Cost of Inventory    │
│ • Added to Purchases in Cost of Sales│ • Operating Expense in SPL           │
│   (Reduces Gross Profit)             │   (Reduces Net Operating Profit)     │
└──────────────────────────────────────┴──────────────────────────────────────┘

3. Net Realisable Value (NRV) Mechanics & Write-Downs

Net Realisable Value (NRV) is the estimated proceeds an entity expects to realize from the sale of inventory in the normal course of business, after deducting all future costs necessary to complete and sell the goods.

The NRV Formula

Net Realisable Value (NRV) = Estimated Selling Price 
                           − Estimated Costs of Completion 
                           − Estimated Costs Necessary to Make the Sale

Factors Causing NRV to Fall Below Cost

1. Physical Damage or Deterioration: Goods damaged in transit, dropped in warehouse, or spoiled.
2. Obsolescence: Products superseded by newer technological models or changing consumer fashion trends.
3. Price Reductions: Severe market price declines due to competitor discounting or oversupply.
4. Rising Completion or Selling Costs: Surging raw material rectification costs or increased delivery/commission fees required to execute the sale.

Step-by-Step Worked NRV Calculation

Scenario: Apex Homewares Ltd holds 400 imported luxury espresso machines.

• Original Cost: £220 each (Total Cost = £88,000).
• Due to a manufacturing defect, water pumps leak. Apex can sell them for £250 each only if it replaces the pump at a rectification cost of £45 per machine and pays a specialized sales distributor a commission of £10 per machine.

NRV per Unit Calculation:

• Estimated Selling Price = £250
• Less: Estimated Cost of Completion (Pump Repair) = (£45)
• Less: Estimated Selling Costs (Commission) = (£10)
• Net Realisable Value per Unit = £250 - £45 - £10 = £195.

Valuation Decision:

• Cost (£220) vs NRV (£195) -> NRV is lower.
• Inventory carrying value = 400 units x £195 = £78,000.
• Inventory Write-Down Expense = 400 units x (£220 - £195) = £10,000 charged to SPL Cost of Sales.

4. Inventory Cost Measurement Formulas: FIFO vs AVCO

When identical inventory units are purchased at varying prices over an accounting period, an entity must apply a consistent cost measurement formula to determine the cost of units sold and the cost of units remaining in closing inventory.

Under IAS 2, two cost formulas are permitted:

1. FIFO (First-In, First-Out)
2. AVCO (Weighted Average Cost)

Statutory Prohibition: The LIFO (Last-In, First-Out) method is strictly prohibited by IAS 2 and FRS 102. LIFO assumes that the newest inventory is sold first, which leaves closing inventory valued at outdated, historical acquisition prices on the SFP and mismatches the physical flow of goods in almost all modern businesses.

┌─────────────────────────────────────────────────────────────────────────────┐
│                     PERMITTED IAS 2 COST MEASUREMENT FORMULAS               │
├──────────────────────────────────────┬──────────────────────────────────────┤
│ FIFO (First-In, First-Out)           │ AVCO (Weighted Average Cost)         │
├──────────────────────────────────────┼──────────────────────────────────────┤
│ • Assumes items purchased first are  │ • Calculates a weighted average unit │
│   sold first                         │   cost across all available stock    │
│ • Closing inventory is valued at the │ • Smooths out price fluctuations     │
│   MOST RECENT purchase prices        │ • Two variants: Periodic AVCO and    │
│ • Matches realistic physical flow    │   Continuous Moving AVCO             │
└──────────────────────────────────────┴──────────────────────────────────────┘

Comprehensive Comparative Worked Example: FIFO vs AVCO

Transaction Record for Month of October:

• 1 Oct: Opening Balance: 100 units @ £10.00 = £1,000
• 8 Oct: Purchase: 200 units @ £12.00 = £2,400
• 14 Oct: Sale / Issue: 180 units
• 22 Oct: Purchase: 150 units @ £14.00 = £2,100
• 28 Oct: Sale / Issue: 120 units

Summary of Physical Quantities:

• Total Available for Sale = 100 + 200 + 150 = 450 units (Total Cost = £1,000 + £2,400 + £2,100 = £5,500).
• Total Units Sold = 180 + 120 = 300 units.
• Units in Closing Inventory = 450 - 300 = 150 units.

Method 1: FIFO (First-In, First-Out)

Under FIFO, the 300 units sold are assumed to come from the earliest purchases:

• Sale 1 (14 Oct, 180 units): 100 units @ £10.00 (£1,000) + 80 units @ £12.00 (£960) = £1,960.
• Sale 2 (28 Oct, 120 units): 120 units @ £12.00 (£1,440) = £1,440.
• Total Cost of Sales (300 units): £1,960 + £1,440 = £3,400.
• Closing Inventory (150 units): Must consist entirely of the most recent batch (22 Oct): 150 units @ £14.00 = £2,100.
• Check: Cost of Sales (£3,400) + Closing Inventory (£2,100) = £5,500 (Total Cost).

Method 2: Periodic Weighted Average (Periodic AVCO)

Calculated at the end of the period by dividing total cost of all goods available by total units available:

Weighted Average Cost per Unit = Total Cost of Goods Available / Total Units Available
                               = £5,500 / 450 units
                               = £12.2222 per unit

• Cost of Sales (300 units): 300 units x £12.2222 = £3,666.67.
• Closing Inventory (150 units): 150 units x £12.2222 = £1,833.33.
• Check: £3,666.67 + £1,833.33 = £5,500.00.

Method 3: Continuous Moving Weighted Average (Moving AVCO)

Recalculates the weighted average unit cost after every incoming purchase batch:

1. 1 Oct: 100 units @ £10.00 = £1,000 (Unit cost = £10.00).
2. 8 Oct Purchase: Add 200 units @ £12.00 (£2,400) -> Total = 300 units @ £3,400. New average = £3,400 / 300 = £11.3333.
3. 14 Oct Sale: Issue 180 units @ £11.3333 = £2,040.00. Balance remaining = 120 units @ £11.3333 = £1,360.00.
4. 22 Oct Purchase: Add 150 units @ £14.00 (£2,100) -> Total = 270 units @ £3,460. New average = £3,460 / 270 = £12.8148.
5. 28 Oct Sale: Issue 120 units @ £12.8148 = £1,537.78. Balance remaining = 150 units @ £12.8148 = £1,922.22.

• Total Cost of Sales: £2,040.00 + £1,537.78 = £3,577.78.
• Closing Inventory: £1,922.22.
• Check: £3,577.78 + £1,922.22 = £5,500.00.

Impact of Price Inflation: FIFO vs AVCO

During periods of rising prices (inflation):

• FIFO produces a higher closing inventory valuation (valued at recent high prices), a lower Cost of Sales, and therefore a higher reported Gross Profit and Net Profit.
• AVCO produces a lower closing inventory valuation, a higher Cost of Sales, and a lower reported profit, dampening the inflationary distortion.

5. Double-Entry Accounting for Inventory & Cost of Sales

In standard manual and periodic accounting systems, purchases made during the financial year are debited to the Purchases Account. At year-end, physical stocktaking determines the quantity of closing inventory, which is valued under IAS 2 rules.

Year-End Adjusting Journal Entries

Date       Account Titles & Explanation             Debit (£)    Credit (£)
20X5
Dec 31     Inventory (SFP Current Asset)            38,700
               Closing Inventory / Cost of Sales (SPL)               38,700
           (To recognize physical closing inventory valued at the
            lower of cost and NRV under IAS 2)

Start of Next Financial Year Opening Reversal

On the first day of the new financial year, the closing inventory from the previous year becomes the opening inventory of the new year:

Date       Account Titles & Explanation             Debit (£)    Credit (£)
20X6
Jan 1      Opening Inventory / Cost of Sales (SPL)   38,700
               Inventory (SFP Current Asset)                        38,700
           (To transfer opening inventory into the SPL Cost of Sales)

Standard Cost of Sales Structure in the SPL

Cost of Sales = Opening Inventory 
              + Purchases 
              + Carriage Inwards 
              − Purchases Returns 
              − Closing Inventory

STATEMENT OF PROFIT OR LOSS (SPL) - TRADING SECTION
─────────────────────────────────────────────────────────────────────────────
Revenue                                                              £240,000
Less: Cost of Sales
  Opening Inventory                                        £32,000
  Purchases                                   £140,000
  Add: Carriage Inwards                         £4,500
  Less: Purchases Returns                     (£6,500)
  Net Purchases                                            £138,000
  Cost of Goods Available for Sale                         £170,000
  Less: Closing Inventory                                 (£38,700)
Cost of Sales                                                       (£131,300)
─────────────────────────────────────────────────────────────────────────────
GROSS PROFIT                                                         £108,700

6. Financial Statement Impact of Inventory Misstatements

Because closing inventory is subtracted from Cost of Sales, any error in valuing closing inventory directly distorts both the SPL and the SFP in the current year, and creates an automatic offsetting error in the subsequent year.

┌─────────────────────────────────────────────────────────────────────────────┐
│                     INVENTORY ERROR IMPACT ON FINANCIAL STATEMENTS          │
├─────────────────────────────────────┬───────────────────────────────────────┤
│ ERROR 1: Closing Inventory OVERSTATED│ ERROR 2: Closing Inventory UNDERSTATED│
│ (e.g. Failure to write down to NRV) │ (e.g. Omission of warehouse stock)    │
├─────────────────────────────────────┼───────────────────────────────────────┤
│ • Cost of Sales: UNDERSTATED        │ • Cost of Sales: OVERSTATED           │
│ • Gross Profit: OVERSTATED          │ • Gross Profit: UNDERSTATED           │
│ • Net Profit: OVERSTATED            │ • Net Profit: UNDERSTATED             │
│ • SFP Current Assets: OVERSTATED    │ • SFP Current Assets: UNDERSTATED     │
│ • SFP Closing Equity: OVERSTATED    │ • SFP Closing Equity: UNDERSTATED     │
├─────────────────────────────────────┴───────────────────────────────────────┤
│ THE TWO-YEAR CARRY-FORWARD CYCLE:                                           │
│ Overstated closing inventory at Year 1 becomes overstated OPENING inventory │
│ in Year 2. In Year 2, this inflates Cost of Sales and UNDERSTATES Year 2    │
│ profit by the exact same amount. Over two years, total profit self-corrects,│
│ but individual annual profits and balance sheets are seriously distorted.    │
└─────────────────────────────────────────────────────────────────────────────┘

7. Master Case Study: Inventory Valuation Schedule & Adjustments

Scenario: At 31 December 20X5, the stocktake of Titan Manufacturing Ltd revealed the following inventory schedule:

1. Batch 1 (Standard Components): Cost £28,000; replacement cost £26,000; expected selling price £36,000; selling costs £2,000.
   • NRV = £36,000 - £2,000 = £34,000. Lower of Cost (£28,000) and NRV (£34,000) = £28,000.
   • (Note: Replacement cost of £26,000 is ignored under IAS 2 because inventory is held for sale, not replacement).
2. Batch 2 (Damaged Sub-Assemblies): Cost £14,500; selling price £16,000; rework/repair costs to make saleable £4,000; sales commission £1,500.
   • NRV = £16,000 - £4,000 - £1,500 = £10,500. Lower = £10,500.
3. Batch 3 (Obsolete Finished Units): Cost £19,000; scrap selling price £8,000; transport to scrap dealer £500.
   • NRV = £8,000 - £500 = £7,500. Lower = £7,500.
4. Batch 4 (Goods in Transit - Purchased FOB Shipping Point): Cost £6,000; freight paid by Titan (carriage inwards) £800; selling price £10,000; selling costs £600.
   • Cost = £6,000 + £800 = £6,800 (Carriage inwards is capitalised). NRV = £10,000 - £600 = £9,400. Lower = £6,800.

Master IAS 2 Valuation Summary Table

• Accounting Entries Required at 31 Dec 20X5:
  • Debit: Inventory (SFP Current Asset) £52,800
  • Credit: Closing Inventory / Cost of Sales (SPL) £52,800