Inventory in Accounting: Types, Turnover, Methods, and Examples

For a lot of businesses, inventory is one of the largest chunks of money tied up anywhere in the company. Get the accounting for it wrong, and your profit numbers, your taxes, and even your loan applications can end up telling a story that is not actually true.

Whether you run a small retail shop, a manufacturing operation, or a distribution business, understanding how inventory works in accounting helps you see your business more clearly and make sharper decisions about what to buy, hold, and sell.

In this article, we will walk through what inventory actually means in accounting, the different types you might be holding, practical management strategies, how inventory turnover connects to profitability, why it matters so much for your financial statements, the accounting methods you can choose from, and a couple of real examples to tie it all together.

What is Inventory in Accounting?

In accounting, inventory refers to all the goods a business holds with the intent to sell, whether that is finished products ready for a customer, materials waiting to be turned into something else, or partially completed items still in production. It is classified as a current asset on the balance sheet, since businesses generally expect to convert it into cash within a year through sales.

This classification matters a lot, because inventory sits alongside cash and accounts receivable as one of the assets lenders and investors look at most closely when judging how liquid a business actually is. Inventory only becomes useful once it is sold, which is exactly why holding too much of it, or the wrong kind of it, can quietly drag down a business’s financial health. 

Also Read: What is Bookkeeping? Types, Procedures, and Example

How Inventory Fits Into the Accounting Equation?

Every purchase of inventory affects your accounting records in a predictable way: if you buy it with cash, your inventory asset goes up while your cash asset goes down by the same amount, keeping the balance sheet in balance. If you buy it on credit instead, inventory goes up on the assets side while accounts payable goes up by the same amount on the liabilities side.

Once that inventory is sold, its cost moves out of the inventory account and into cost of goods sold on the income statement, which is what eventually reduces your reported profit for the period.

This connection between the balance sheet and the income statement is exactly why inventory accounting is not just a warehouse management task, it is a core part of how your financial statements are built. 

Types of Inventory

Raw Materials

Raw materials are the basic inputs a business purchases to eventually turn into a finished product, such as fabric for a garment factory, timber for a furniture maker, or flour for a bakery. This category sits at the very start of the production process, and its value on the balance sheet reflects what was paid to acquire it, not what it will eventually be worth once transformed.

Businesses that hold a lot of raw materials need to pay close attention to storage conditions and spoilage risk, especially for perishable inputs common in Indonesia’s food and beverage sector. Keeping raw material levels aligned with actual production needs, rather than overstocking just because a supplier offered a bulk discount, is one of the simplest ways to avoid tying up too much cash.

Tracking this category separately from work-in-progress and finished goods also gives you a clearer view of exactly where in the production pipeline your money is currently sitting.

Work-in-Progress (WIP)

Work-in-progress inventory covers items that have started the production process but are not yet finished and ready for sale, like a half-assembled piece of furniture or a garment that still needs stitching and finishing. Valuing WIP accurately can be trickier than raw materials or finished goods, since it usually needs to include not just materials but also a portion of labor and overhead costs incurred so far.

Manufacturing businesses in particular need a reliable system for tracking WIP, since a backlog building up in this category often signals a bottleneck somewhere in the production line. A growing WIP balance without a corresponding increase in finished goods can be an early warning sign worth investigating before it turns into a bigger operational problem. 

Finished Goods

Finished goods are products that have completed the production process and are sitting ready for sale, whether in a warehouse, a retail shelf, or an online fulfillment center. This is usually the category most directly tied to sales forecasting, since holding too much finished inventory relative to actual demand ties up cash and increases the risk of obsolescence or, for perishable goods, spoilage.

Holding too little can mean missed sales and frustrated customers who cannot get what they want when they want it. Retail and distribution businesses in Indonesia often live and die by how well they manage this balance, especially around seasonal peaks like Ramadan or year-end holiday shopping. 

MRO (Maintenance, Repair & Operating) Supplies

MRO inventory covers the items a business uses to support its own operations rather than to sell directly, such as machine lubricants, spare parts, cleaning supplies, or office consumables. These items are easy to overlook because they do not directly generate revenue, but running out of a critical spare part can halt production just as effectively as running out of raw materials.

Many businesses under-invest in tracking this category carefully, treating it as a minor expense rather than a genuine inventory asset worth monitoring. For manufacturing or logistics operations especially, a well-organized MRO inventory system prevents costly downtime caused by a missing part that could have been ordered days or weeks in advance.

Even though MRO items are usually smaller in value individually, poor visibility into this category can quietly create operational headaches that ripple into missed deadlines and unhappy customers.

Inventory Shrinkage

Inventory shrinkage refers to the loss of inventory caused by factors such as theft, damage, administrative errors, or vendor fraud. When items go missing or are damaged without being recorded as sales, they must be written off, which directly reduces profitability by increasing the Cost of Goods Sold (COGS).

For businesses, this means that even if sales figures look good, bottom-line profit can suffer if shrinkage isn’t monitored. To mitigate this risk, businesses should implement regular cycle counts, counting smaller sections of inventory on a rotating basis and enforce strict documentation and security protocols to identify discrepancies early and maintain accurate inventory records.

Also Read: Cash Flow Statement: Components, Methods, and How to Analyze It

Effective Inventory Management Strategies

Just-in-Time (JIT) Inventory

Just-in-time inventory management aims to receive goods only as they are needed for production or sale, rather than stockpiling large quantities ahead of time.

This approach can dramatically reduce the amount of cash tied up in inventory and lowers the risk of holding obsolete or spoiled stock, which is especially valuable for businesses with limited working capital. The tradeoff is that JIT requires very reliable suppliers and accurate demand forecasting, since even a small disruption in the supply chain can quickly halt production or leave shelves empty.

Businesses considering this approach in Indonesia should weigh it carefully against local supply chain realities, since longer or less predictable delivery times from certain suppliers can make a pure JIT model risky without a reasonable buffer. JIT genuinely frees up cash that would otherwise be sitting idle in a warehouse, which can then be redirected toward growth or debt repayment.

ABC Analysis

ABC analysis sorts inventory into three categories based on value and importance: A-items are high-value or high-priority goods that deserve the closest attention, B-items are moderate priority, and C-items are low-value goods that need only minimal oversight. This approach helps businesses focus their limited time and attention where it actually matters most, rather than spreading equal effort across every single item in the warehouse.

A distribution business, for example, might discover that a small number of A-items account for the majority of total inventory value, which means tightening controls on just those few items delivers most of the benefit.

Reviewing and updating these categories periodically is important too, since a product’s importance can shift with seasonal demand or changing customer preferences. This kind of prioritization is a practical, low-cost way to bring more discipline to inventory management without needing expensive new systems.

Setting Reorder Points and Safety Stock

A reorder point is the inventory level at which you should place a new order to avoid running out before the next shipment arrives, and it is typically calculated based on how quickly you sell through stock and how long your supplier takes to deliver.

Safety stock is an additional cushion held on top of that calculated reorder point, meant to absorb unexpected spikes in demand or unexpected delays from suppliers. Getting these numbers right requires looking at actual historical sales and delivery data rather than guessing, since setting them too high ties up unnecessary cash while setting them too low risks stockouts.

For seasonal businesses, these numbers often need to be adjusted throughout the year rather than treated as fixed, since demand patterns during a promotional period look very different from a slow month.

Businesses that take the time to calculate these figures properly tend to avoid both the cash drain of overstocking and the lost sales that come from running dry at the wrong moment.

Using Inventory Management Software

Manual inventory tracking through spreadsheets works fine for very small operations, but it quickly becomes error-prone and time-consuming as product variety and transaction volume grow.

Inventory management software automates much of this work, tracking stock levels in real time, flagging when reorder points are hit, and often integrating directly with accounting software so inventory values update automatically as sales happen.

This kind of system also makes it far easier to run the ABC analysis and turnover calculations discussed elsewhere in this article, since the data is already organized and accessible rather than scattered across multiple files.

For growing Indonesian SMEs juggling multiple sales channels, whether that is a physical store, a marketplace, and a website all at once, dedicated software becomes almost essential for keeping stock counts accurate across every channel. The upfront cost of adopting a proper system is usually recovered quickly through fewer stockouts, less overstocking, and far less time spent manually reconciling numbers.

What Is Inventory Turnover and Its Impact on Profitability

How to Calculate Inventory Turnover

Inventory turnover measures how many times a business sells through and replaces its entire inventory over a given period, and it is calculated by dividing cost of goods sold by average inventory for that same period. Average inventory is typically calculated by adding the beginning and ending inventory balances for the period and dividing by two, which smooths out any unusual spikes at either end.

For example, if a business has an average inventory of Rp100 million and a cost of goods sold of Rp600 million for the year, its inventory turnover ratio would be six, meaning it sold through its inventory roughly six times during that period.

This ratio can also be converted into days, often called days inventory outstanding, by dividing 365 by the turnover ratio, which tells you roughly how many days, on average, inventory sits before it sells. Calculating this figure regularly gives you a much more responsive read on how efficiently your inventory is actually moving.

What a High vs. Low Turnover Ratio Means

A high turnover ratio generally signals that a business is selling through its inventory quickly, which usually means strong demand, efficient purchasing, and less cash sitting idle in stock. A low turnover ratio, on the other hand, often points to overstocking, weak sales, or products that are simply not moving the way they should, all of which tie up cash that could be used elsewhere.

That said, what counts as a good ratio varies significantly by industry; a grocery business will naturally have a much higher turnover than a furniture retailer, since perishable goods simply move faster than big-ticket items. Comparing your turnover ratio against industry benchmarks, rather than against a generic number, gives you a far more accurate read on whether your inventory levels are actually healthy.

It is also worth tracking this ratio over time within your own business, since a declining trend often surfaces a problem well before it shows up clearly in your cash flow.

How Turnover Connects to Profitability

Faster inventory turnover generally supports stronger profitability, since cash is not sitting idle in unsold stock and the risk of obsolescence, spoilage, or markdown pricing to clear old inventory is reduced.

A slow-moving inventory position often forces businesses into discounting to clear stock, which directly erodes gross margin and can drag down profitability even if the top-line sales number still looks reasonable. There is a balance to strike here too, since turning inventory over too aggressively without enough safety stock can lead to stockouts, lost sales, and frustrated customers who take their business elsewhere.

The healthiest position is usually a turnover ratio that reflects genuinely strong sales velocity rather than one achieved by underinvesting in stock and risking availability. 

Why Inventory Matters for Financial Statements and Decisions

Impact on the Balance Sheet

Inventory usually shows up as one of the largest current assets on the balance sheet for any business that sells physical goods, which means an error in how it is valued can significantly distort the overall financial picture. Overstated inventory inflates total assets and can make a business look more liquid and financially healthy than it actually is, which becomes a real problem if a bank or investor is relying on those numbers.

Understated inventory has the opposite effect, potentially making a perfectly healthy business look weaker than it really is. Because inventory sits right alongside cash and receivables in the current assets section, its accuracy directly affects key liquidity ratios like the current ratio, which lenders frequently use to assess creditworthiness. 

Impact on the Income Statement (COGS & Gross Margin)

The way inventory is valued directly determines cost of goods sold, which in turn determines gross margin, one of the most closely watched figures in any income statement. If inventory costs are miscalculated, whether through a valuation error or an incorrect accounting method, reported profit can be significantly off from the business’s actual performance for that period.

This is exactly why the choice of inventory accounting method, covered in more detail later in this article, is not just a technical bookkeeping decision, it genuinely changes how profitable your business appears on paper.

Comparing gross margin trends over multiple periods is also one of the fastest ways to spot a developing inventory problem, whether that is rising costs from suppliers or increasing markdowns needed to clear slow-moving stock. Inventory is one of the biggest levers affecting reported profitability.

Impact on Business Decisions and Financing

Accurate inventory data feeds directly into decisions like how much to reorder, when to run a promotion to clear aging stock, and whether a particular product line is actually worth continuing to carry. Beyond internal decisions, banks and investors frequently use inventory as loan collateral, which means an accurate, well-documented valuation can directly affect how much financing a business can access and on what terms.

Businesses that cannot produce clean, reliable inventory records often face more scrutiny and slower approval during due diligence, since inconsistent numbers raise questions about the reliability of the rest of the financial statements too. Regularly reviewing inventory data alongside sales and cash flow also helps business owners catch early warning signs, like a product category quietly becoming a cash drain, before it becomes a bigger strategic problem. 

Inventory Accounting Methods

FIFO (First-In, First-Out)

FIFO assumes that the oldest inventory in stock is the first to be sold, which means the cost of your earliest purchases gets recorded as cost of goods sold, while your most recent, often more expensive, purchases remain valued on the balance sheet as ending inventory.

This method tends to mirror the actual physical flow of goods for most businesses, especially those selling perishable items or products at risk of becoming outdated, which is why it is the most widely used method around the world. During periods of rising prices, FIFO generally produces a lower cost of goods sold and a higher reported profit compared to other methods, since older, cheaper costs are being expensed first.

It is also the method permitted under Indonesian financial reporting standards, since PSAK, which follows international IFRS guidance, does not allow the LIFO method at all. For most Indonesian retail, F&B, and distribution businesses, FIFO is usually the natural default, both because it matches how goods actually move and because it keeps you compliant with local accounting standards.

Weighted Average Cost

The weighted average cost method takes the total cost of all inventory available for sale during a period and divides it by the total number of units, producing a single average cost applied evenly to both cost of goods sold and ending inventory.

This method works particularly well for businesses dealing with inventory that is essentially indistinguishable unit to unit, such as bulk raw materials, fuel, or commodities where tracking individual purchase costs would be impractical. Because it smooths out price fluctuations over the period, weighted average tends to produce results that sit somewhere between FIFO and other methods, which some businesses prefer for the added stability in reported numbers period over period.

The tradeoff is that this smoothing effect can obscure real cost trends, which matters if you are trying to closely track how rising supplier costs are affecting your margins on a specific product. Like FIFO, weighted average is fully permitted under Indonesian accounting standards, making it a solid alternative for businesses with large volumes of interchangeable stock.

Specific Identification

Specific identification tracks the exact cost of each individual inventory item, which is only practical for businesses selling low-volume, high-value, and easily distinguishable goods, such as jewelry, vehicles, or custom furniture pieces.

Because each item’s cost is recorded and matched individually, this method gives the most precise possible picture of cost of goods sold and ending inventory value, with no averaging or assumptions involved. The obvious downside is that it becomes completely impractical for businesses selling large volumes of similar or interchangeable products, since tracking every single unit individually would be far too time-consuming.

For businesses that do qualify for this method, such as a boutique selling handcrafted goods or a car dealership, it offers a level of accuracy the other methods simply cannot match. If your business deals in unique, serialized, or one-of-a-kind items, this is generally the most appropriate method to use rather than forcing a bulk-costing approach that does not fit your actual inventory.

LIFO for Indonesian Businesses

LIFO (last-in, first-out) assumes the most recently purchased inventory is sold first, which can reduce taxable income during periods of rising prices since higher, more recent costs get expensed sooner.

This method is well known internationally and still used by some companies operating under U.S. GAAP, but it is important for Indonesian business owners to understand that LIFO is not permitted under PSAK, Indonesia’s financial accounting standards, since these standards follow IFRS, which prohibits the method entirely.

This means that even if you come across LIFO in an international finance article or a course from a country that allows it, it is simply not an option available to you when preparing financial statements in Indonesia. Businesses here should default to FIFO, weighted average, or specific identification depending on the nature of their inventory, all of which are fully compliant with local standards. 

Examples of Inventory

Inventory Breakdown for a Furniture Manufacturer

Let’s look at CV Kayu Lestari, a mid-sized furniture manufacturer in Jepara, to see how the different inventory categories show up together in practice.

At the end of the month, the company holds Rp180,000,000 in raw materials, mainly teak wood and hardware fittings waiting to enter production.

It also holds Rp95,000,000 in work-in-progress, representing partially assembled furniture pieces still on the factory floor, and Rp210,000,000 in finished goods sitting in the warehouse ready for shipment to buyers.

On top of that, the company carries Rp15,000,000 in MRO supplies, including machine lubricants and spare parts for its woodworking equipment. Here is what that inventory position looks like laid out clearly:

Seeing inventory broken out by category like this tells a much richer story than a single total inventory number ever could.

In this case, the sizable work-in-progress balance is worth watching closely, since a WIP figure that keeps growing month over month without a matching rise in finished goods could point to a production bottleneck worth investigating.

FIFO Costing for a Retail Fashion Store

Now let’s look at Butik Anggun, a small retail fashion store, to see how the FIFO method actually plays out when calculating cost of goods sold. In March, the store purchased 100 units of a particular dress design at Rp150,000 each.

In April, it purchased another 100 units of the same design, but the supplier’s price had risen to Rp170,000 each due to rising fabric costs.

In May, the store sold 120 units of that dress to customers. Under FIFO, the first 100 units sold are costed at the March price, and the remaining 20 units are costed at the April price, since those are the next-oldest units available.

Here is how that breaks down:

Notice how the remaining 80 units in stock are valued at the more recent, higher April cost, which is exactly how FIFO is supposed to work: older, cheaper costs flow out first through cost of goods sold, while newer costs remain on the balance sheet as ending inventory.

If Butik Anggun had used weighted average instead, all 120 units sold would have been costed at a single blended rate between Rp150,000 and Rp170,000, producing a slightly different cost of goods sold and a different ending inventory value.

Conclusion

Inventory is far more than boxes on a shelf; it is a genuine financial asset that touches your balance sheet, your income statement, your tax position, and your ability to secure financing.

Understanding the different types of inventory, applying the right management strategies, tracking turnover, and choosing an accounting method that fits your business and complies with Indonesian standards all add up to a much clearer, more accurate picture of how your business is actually performing.

Keep your finances organized with IndoLedger’s professional bookkeeping and accounting services. Let our experts help you track inventory, manage financial records, and gain better visibility into your business finances. Contact IndoLedger today and focus on growing your business while we take care of the numbers.