Inventory Write-Downs Explained

Some stock never sells at the price you planned. Seasons change, styles fade, packaging gets damaged and last year's model meets this year's discount. An inventory write-down is how your books admit that honestly. Here is what it means, how to calculate it and how to handle it calmly before year-end.

Picture a small boutique in mid-September. The summer linen is still hanging on the back rail, a box of phone cases fits a model nobody uses anymore, and a delivery of scented candles arrived with cracked lids. On the balance sheet, all of that stock still sits at full purchase cost. In the real world, it will sell for much less, if it sells at all.

That gap between the number in your books and the money you can realistically get back is exactly what an inventory write-down deals with. It sounds technical, and the accounting rules do get detailed, but the core idea is simple and very useful for any business that holds stock: retailers, makers, online shops, cafes with dry goods, even service businesses that keep parts on hand.

What an inventory write-down actually is

When you buy or make stock, you record it as an asset at cost. That cost usually includes the purchase price plus the costs of getting it ready to sell, such as freight in or materials and labor for things you make. The stock sits on the balance sheet at that cost until you sell it, and then the cost moves to cost of goods sold.

A write-down happens when the stock is no longer worth what it cost. You reduce its value on the balance sheet and record the difference as an expense in the period you recognize the loss. You are not throwing the stock away. You are simply saying, on paper, "this is now worth less."

Write-down vs write-off

People often use these words loosely, so it helps to separate them:

• Write-down: the stock still has some value, just less than cost. A jacket that cost $40 that will now only sell for $25 gets written down.
• Write-off: the stock has no value left. It is stolen, spoiled, broken beyond repair or impossible to sell. Its full cost comes off the books.

Both reduce inventory and both hit profit. The difference is whether anything is left.

Net realizable value: the number that decides

Under both US GAAP (ASC 330) and IFRS (IAS 2), inventory is generally measured at the lower of cost and net realizable value. Net realizable value, often shortened to NRV, is:

Expected selling price minus the costs to complete and sell the item.

Costs to sell can include things like shipping to the customer, platform or payment fees, packaging, and any repair or finishing work needed before the item can go out the door. If you need to fix a scratch or repackage a product, that cost reduces what you will really net.

If NRV is higher than cost, nothing changes: you keep the stock at cost. If NRV falls below cost, you write the stock down to NRV.

US GAAP has some variations depending on the inventory method you use, and IFRS and US GAAP treat some situations differently, for example whether a write-down can later be reversed if prices recover. If those details matter for your business, ask your accountant which rules apply to your books.

Common reasons stock loses value

A write-down is not a sign that you failed. It is a sign that markets moved, which they always do. Here are the triggers small businesses run into most often:

• Seasonality: summer stock in autumn, holiday stock in January, back-to-school items in October.
• Obsolescence: a new product version, a changed standard, a cable that no longer fits.
• Damage: water, breakage, crushed packaging, faded displays.
• Expiry and spoilage: food, cosmetics, supplements and anything with a date on it.
• Falling market prices: a competitor or supplier drops prices and your stock must follow.
• Slow movers: items that simply have not sold in many months and are unlikely to sell at full price.
• Higher selling costs: if fees or shipping costs rise, your NRV drops even when your price stays the same.

How to review your stock for write-downs

You do not need fancy software to do this well. A spreadsheet export from your point of sale or inventory system is enough for most small businesses. Set aside an afternoon and work through these steps.

1. Export your stock list. Pull every item with its quantity on hand, unit cost and the date it was last sold or received.
2. Flag the risky items. Mark anything slow moving, seasonal, damaged, close to expiry or superseded by a newer version.
3. Check the real selling price. For flagged items, ask what you could actually get today, not what the tag says. Look at your recent sale prices and what similar items sell for.
4. Subtract the costs to sell. Include fees, shipping, packaging and any repair or repackaging work.
5. Compare NRV with cost. If NRV is lower, the difference per unit times quantity is your write-down.
6. Document your reasoning. Note the date, the evidence (sale prices, damage photos, expiry dates) and who made the call.
7. Decide what happens next. Discount, bundle, return to supplier, donate, recycle or dispose. The write-down and the action plan go together.

A simple write-down review template

Copy these columns into a spreadsheet. Add one row per item or category you flagged. The formulas are simple: NRV per unit is expected price minus costs to sell, and the write-down is cost minus NRV, times quantity, when NRV is lower.

All amounts above are made-up examples. Keep the finished sheet with your year-end files so you can show how each figure was reached.

How a write-down shows up in your books

In practice, a write-down is a journal entry that reduces your inventory account and records an expense. Many small businesses include it in cost of goods sold, while some show it as a separate line such as "inventory write-down" or "inventory obsolescence." Your accountant or bookkeeping software setup will usually decide which.

Some businesses use an allowance account, sometimes called an inventory reserve or provision, that sits against inventory. This lets you keep the original cost in your item records while still showing the lower value overall. It is handy if your inventory system tracks unit costs that you do not want to change item by item.

What it does to your numbers

• Profit goes down in the period you record it.
• Gross margin may drop if the write-down sits inside cost of goods sold.
• Inventory value goes down, so your balance sheet is more realistic.
• Inventory turnover changes. Turnover is cost of goods sold divided by average inventory, so a smaller inventory figure and a higher cost of goods sold both push it up for that period. Keep that in mind when you compare one year with the next.
• Cash does not move. The cash left the business when you bought the stock. The write-down only recognizes that some of it will not come back.

What about taxes?

Tax rules for inventory are separate from accounting rules and vary by country. In some cases a write-down that is correct for your accounts is handled differently on your tax return, and evidence such as sale prices or disposal records may be needed. This article is general information, not tax or accounting advice. Ask a qualified accountant how your write-downs should be treated for tax in your situation.

Turning a write-down into a better buying plan

The real value of a write-down review is what it teaches you. Once you see which items lost value and why, you can adjust how you buy for next season.

• Order seasonal stock in smaller first runs and reorder winners, rather than betting the whole season on one order.
• Agree return or exchange terms with suppliers for slow sellers where you can.
• Set a markdown calendar: for example, first discount after 60 days, deeper discount after 90, clearance after 120 (a rule of thumb you can adjust to your own sales cycle).
• Watch expiry dates and rotate stock so older items sell first.
• Track sell-through by category so the next write-down review takes an hour, not a day.

With Q4 coming, this matters even more. A September review lets you move summer leftovers before holiday stock arrives, frees cash for the products customers are actually shopping for, and keeps your year-end count clean.

Frequently asked questions

The bottom line

An inventory write-down simply brings the value of your stock in line with reality. Compare cost with net realizable value, write down the difference when it is lower, keep your evidence and decide what to do with the items themselves.

Do it in September rather than December, and a write-down stops being a nasty year-end surprise. It becomes a useful signal that helps you buy smarter and head into the busiest quarter with cleaner shelves and clearer numbers.