Can I Claim Stock and Inventory as a Business Expense?
Yes - but only when sold. Stock is counted as an asset until sold, then becomes cost of goods sold.
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What HMRC Says
Stock purchases reduce profit when the stock is sold (cost of goods sold), not when purchased. Unsold stock is an asset on your balance sheet.
When You Can Claim
- Products purchased for resale
- Raw materials for manufacturing
- Components and parts
When You Cannot Claim
- Stock not yet sold (it's an asset)
- Personal items mixed with stock
Good to Know
Accounting note: Stock valuation at year-end affects your profit calculation significantly
Understanding Stock and Inventory Expenses
Stock and inventory is one of the most misunderstood expense categories for UK limited company directors who run product-based businesses. The critical point is timing: the cost of stock reduces your taxable profit only when the stock is sold, not when you buy it. This is fundamentally different from other business expenses like software subscriptions or office supplies, which are deducted when incurred.
The accounting treatment follows the matching principle. When you purchase stock, the cost sits on your balance sheet as a current asset called "inventories" or "stock." When that stock is sold to a customer, its cost moves from the balance sheet to the profit and loss account as "cost of goods sold" (COGS). The difference between your selling price and the cost of goods sold is your gross profit. This means that buying £10,000 of stock in March does not reduce your profit by £10,000. Only the stock that has actually been sold by your year-end reduces your profit.
Year-end stock valuation is where this gets practical. At the end of your accounting period, you must count and value your unsold stock. HMRC requires stock to be valued at the lower of cost or net realisable value (what you could sell it for). If you bought 100 items at £10 each and have 30 unsold at year-end, your closing stock is £300 (30 x £10). This £300 remains on your balance sheet and does not reduce profit until those items sell in the next period.
For companies that manufacture products, the cost of stock includes raw materials, components, direct labour, and a proportion of production overheads. This is called "absorbed cost" and can be more complex to calculate. Most small companies use a simpler approach, but if you manufacture goods, your accountant should advise on the correct costing method.
VAT on stock purchases is reclaimable when you buy the stock, not when you sell it. This is one area where the VAT treatment differs from the Corporation Tax treatment. You reclaim input VAT on your next VAT return after purchase, even though the stock cost will not reduce your CT profit until it sells. This can create a helpful cash flow advantage for stock-heavy businesses.
Real-World Examples
Online retailer purchasing seasonal stock
A clothing retailer buys £15,000 of winter stock in September. By the 31 March year-end, £12,000 of stock has been sold and £3,000 remains unsold. Only the £12,000 cost of goods sold reduces taxable profit. The £3,000 closing stock sits on the balance sheet as a current asset.
Food and beverage business with perishable stock
A speciality food company buys ingredients worth £2,000 per month. At year-end, £800 of ingredients remain in the kitchen. The closing stock of £800 is valued at cost since the items are fresh. If any stock has deteriorated, it is written down to net realisable value (potentially zero for spoiled food).
Electronics reseller with slow-moving stock
A tech reseller holds £8,000 of stock at year-end, but some items are older models now worth less than what was paid. The stock is valued at the lower of cost or net realisable value. If a laptop bought for £500 can now only sell for £350, it is valued at £350 in the year-end stocktake.
Handmade products business
A jewellery maker buys £3,000 of materials during the year and creates finished pieces. At year-end, she has £500 of raw materials and £1,200 of finished jewellery in stock. The raw materials are valued at cost. The finished pieces include material cost plus a reasonable allocation of direct labour time.
Common Mistakes to Avoid
- Treating all stock purchases as immediate expenses. Stock is only deductible when sold. Buying £20,000 of stock and deducting it all in one year when half remains unsold will overstate your expenses and understate your profit, which HMRC will correct on enquiry.
- Not performing a year-end stock count. Your accountant needs the closing stock figure to calculate profit correctly. An inaccurate stock count directly affects your tax liability. Count your stock, value it, and report it accurately.
- Valuing damaged or obsolete stock at original cost rather than writing it down. If stock cannot be sold at its original cost, it must be valued at the lower net realisable value. Failing to write down obsolete stock means you are overpaying tax.
- Mixing personal items with business stock. If you take products from your company's stock for personal use, this is a benefit in kind and should be recorded as drawings or a BIK, not absorbed into cost of goods sold.
Frequently Asked Questions
When can I deduct the cost of stock from my profits?
How should I value stock at year-end?
Can I write off damaged or obsolete stock?
Do I need to do a physical stock count?
Can I reclaim VAT on stock before I sell it?
Source: HMRC Business Income Manual BIM33100 - Stock valuation; HMRC BIM33105 - Lower of cost or net realisable value
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