Stock management
Learn how stock management works, which methods suit your business, and how to keep records in Singapore
Published Wednesday 30 September 2026
Table of contents
Key takeaways
- Stock management is how you order, store, track and control the products you sell, so you meet demand without tying up cash
- Methods such as first in, first out (FIFO) and reorder points help you cut waste and avoid running out
- Tracking stock turnover and carrying costs shows you how hard your stock is working for your business
- In Singapore, you’ll keep purchase records for at least five years and value stock using FIFO or weighted average cost
What is stock management?
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Stock management is the process of ordering, storing, tracking and controlling the products your business buys, makes or sells. It tells you how many units you have on hand, and when and how much to reorder.
Picture a bubble tea shop before the lunch rush. With good stock management, you spot that tapioca pearls are running low days earlier, and your order arrives before the queue does.
For any business that sells physical products, stock management sits at the centre of daily operations. Clear records show you what’s coming in and what’s going out, so you buy smarter and waste less. Xero’s guide to inventory covers the wider strategies behind it.
Stock management vs inventory management
Stock management and inventory management are commonly used interchangeably, and in most small businesses they describe the same job. Where people do draw a line, stock usually means finished goods ready for sale, while inventory also includes raw materials and work in progress.
It helps to know what counts as inventory in your accounts, because it affects how you value what you hold. A third term, inventory control, is the hands-on part: counting and protecting the stock you already have.
Inventory management is the planning side, covering demand forecasting and purchasing. Stock management blends both, which is why the methods and tools below cover planning and day-to-day control.
Why stock management matters for small businesses
When you run a small business, every dollar counts. Good stock management protects your bottom line by helping you avoid two costly problems: holding too much stock and holding too little.
Overstocking locks up working capital you could spend elsewhere, and it raises storage costs and the risk of products expiring. Understocking leads to lost sales and customers who may try a competitor next time.
Planning ahead also saves you time, because you’ll place fewer last-minute rush orders. Accurate stock data makes your financial reports more reliable too. When your records match your shelves, your balance sheet reflects reality and your cash flow is easier to plan.
Types of stock
Most businesses hold a mix of stock types, and each one needs slightly different handling. These are the four main categories you’ll come across.
- Raw materials: the ingredients or parts you buy to make your products, such as flour for a bakery or timber for a furniture maker
- Work in progress (WIP): items partway through production that aren’t ready to sell yet, which you track to spot bottlenecks
- Finished goods: completed products ready for customers, and the main focus of day-to-day stock management
- Consumables: supplies you use but don’t sell, such as packaging or cleaning products, which keep your operations running
Stock management methods
The right stock management method depends on how long your products last and how predictable your sales are. Many small businesses combine two or more of the methods below.
Just-in-time (JIT)
Just-in-time (JIT) means ordering stock only when you need it, shortly before you use or sell it. It minimises storage costs and waste, but it relies on dependable suppliers and accurate demand forecasts.
First in, first out (FIFO)
First in, first out (FIFO) means you sell or use your oldest stock first. It’s essential for perishable goods such as food and cosmetics. It also keeps non-perishable items moving before they go out of date.
ABC analysis
ABC analysis sorts your stock into three groups by value. “A” items are your highest-value products, “B” items sit in the middle, and “C” items are low-value products you hold in large quantities. This helps you focus counting and ordering effort where it has the biggest impact.
Safety stock
Safety stock is extra inventory you keep as a buffer against sudden demand spikes or late deliveries. The right level balances the cost of holding extra units against the cost of running out. It’s most useful when supplier lead times vary.
Economic order quantity (EOQ)
Economic order quantity (EOQ) is a formula that works out the order size that keeps your combined ordering and holding costs as low as possible. It suits products with steady, predictable demand, and it cuts both excess stock and frequent small orders.
Minimum stock level and reorder point
A minimum stock level is the lowest quantity of a product you’re willing to hold before you reorder. The reorder point turns that into a clear trigger by allowing for how long your supplier takes to deliver.
Reorder point = average daily sales × supplier lead time (in days) + safety stock
Say you sell 20 units a day, your supplier takes 5 days to deliver and you keep 30 units of safety stock. Your reorder point is 20 × 5 + 30 = 130 units, so you place your next order when stock drops to 130.
Periodic vs perpetual inventory
Periodic inventory means counting stock at set intervals, such as weekly or monthly. It’s simple to run, though you only see exact levels after each count. Perpetual inventory updates stock levels with every sale or delivery, giving you up-to-date figures, and it usually runs on software.
How to set up a stock management system
Setting up a stock management system is simpler than it sounds, even if you’re starting from scratch. Work through these seven steps, and see how to build an inventory management system for extra detail.
1. Audit your current stock
Start with a full physical count of every product, raw material and consumable you hold. Record the quantity and location of each item, so you have a baseline for everything that follows.
2. Organise and categorise your products
Group stock into logical categories, such as product type or supplier, and give each item a unique stock keeping unit (SKU). Consistent names and codes make trends easier to spot and reports quicker to run.
3. Choose your stock management method
Pick the method that suits your products and sales patterns. A cafe might use FIFO to keep ingredients fresh, while a retailer with thousands of SKUs might use ABC analysis.
4. Set reorder points and quantities
For each product, set the reorder point that triggers an order and decide how much to order each time. Build in supplier lead times and safety stock, and use past sales to forecast busy periods such as Chinese New Year. A cash flow forecast shows whether you can afford larger orders before peak season.
5. Pick the right software
Spreadsheets can work when you’re starting out, but they get harder to keep accurate as your range expands. Look for stock tracking tools that connect with your accounting software, so stock data flows straight into your financial records.
6. Train your team and set clear processes
Your system works best when everyone uses it the same way. Show your team how to record stock movements and flag discrepancies, then document the process so it stays consistent as staff change.
7. Review and adjust regularly
Schedule regular reviews to compare your records with actual stock, and adjust reorder points as demand changes. Monthly or quarterly reviews suit most small businesses.
Key stock management metrics
A few simple metrics show how well your stock is working for your business. Once your records are accurate, these are the numbers worth tracking.
Stock turnover shows how many times you sell and replace your stock in a period. You’ll find your cost of goods sold in your profit and loss report, and average inventory is usually opening plus closing stock, divided by two.
Stock turnover = cost of goods sold ÷ average inventory
Days inventory on hand tells you roughly how long your stock lasts at your current sales rate.
Days inventory on hand = 365 ÷ stock turnover
For example, if your cost of goods sold for the year is S$120,000 and your average inventory is S$20,000, your stock turnover is 6. That works out to about 61 days of inventory on hand (365 ÷ 6).
Carrying cost is what you spend holding stock before it sells. It includes storage, insurance, shrinkage from theft or damage, and obsolescence when products expire or fall out of fashion. Watching carrying costs alongside turnover helps you measure profitability product by product.
Stock records in Singapore
If you run a business in Singapore, your stock records support your tax obligations as well as your day-to-day decisions. Two sets of rules shape how you keep and value them.
The Inland Revenue Authority of Singapore (IRAS) expects companies to hold on to business records and source documents, including purchase records. You’ll need to keep them for at least five years from the relevant Year of Assessment. You can check the full record-keeping requirements on the IRAS website.
For valuation, Singapore’s accounting standards, including SFRS(I) 1-2 and FRS 2 for inventories, are based on IFRS Accounting Standards, so they follow International Accounting Standard 2 (IAS 2). For interchangeable items, IAS 2 allows FIFO or weighted average cost. As this IAS 2 summary explains, the last in, first out (LIFO) method isn’t permitted.
Stock management software
Many small businesses start tracking stock in spreadsheets. As your product range expands, dedicated inventory management software saves you time and cuts errors.
Spreadsheets rely on manual entry, so mistakes creep in and figures lag behind what’s on your shelves. They also sit apart from your other business tools, which means entering the same data twice.
When you compare options, look for real-time tracking, automatic reorder alerts, stock valuation reports and a direct link to your accounting. Cloud-based software lets your team check stock from any device, with updates syncing automatically so everyone works from the same numbers. Xero connects with inventory apps, so your stock data flows into your accounting records without re-keying.
Common stock management mistakes to avoid
Small habits can quietly erode the value of your stock system. Watch for these common mistakes and fix them early.
- Skipping regular counts: system records drift from reality through theft or data entry slips unless you check them
- Overstocking just in case: extra stock feels safe, but it ties up cash and may expire before it sells
- Letting slow sellers linger: review slow-moving items regularly, then discount or bundle them
- Ignoring seasonal demand: plan ahead for festive peaks such as Chinese New Year and Deepavali, then scale back orders afterwards
- Using disconnected systems: stock records kept apart from your accounts lead to errors and delays
- Ordering on gut feel: even simple forecasts based on past sales make your orders more accurate
- Leaving staff untrained: inconsistent processes make your stock data unreliable
Simplify your stock management with Xero
Good stock management keeps cash free for growth and your shelves ready for customers. With Xero, you can track inventory items and connect specialist inventory apps, so your stock and financials stay in sync. Sign up today and get one month free to see how easy it can be.
FAQs on stock management
Here are quick answers to common questions about stock management.
What does a stock manager do?
A stock manager oversees receiving and storing stock, runs counts and places supplier orders to keep levels on target. In many small businesses, the owner takes on this role alongside everything else.
What is an SKU?
An SKU is an internal code you create for each product variant, such as a T-shirt in a specific size and colour. Manufacturer barcodes stay the same wherever a product is sold, while your SKUs follow a system that suits your business.
How often should you count your stock?
Many small businesses do a full count monthly, with weekly spot checks on high-value or fast-moving items. This rolling approach, known as cycle counting, keeps records accurate without closing for a full stocktake.
What is dead stock?
Dead stock is inventory that hasn’t sold for a long time and is unlikely to sell at full price. Clearing it through discounts or bundles frees up space and cash for products that move.
How do you handle stock for an online and physical store?
Use a centralised system that syncs stock across every sales channel, so an online sale instantly updates your in-store count. Holding a small buffer for online orders also helps you fulfil every order you accept.
Related terms
Learn more about stock management
Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.