What Is a Reorder Point?
A reorder point (ROP) is the inventory level at which you place a new order. It is set so replacement stock arrives before the item runs out, covering demand during the supplier's lead time plus a safety buffer.
The Reorder Point Formula
The standard reorder point formula has two parts: the stock you expect to use while waiting for the order, and a buffer for the unexpected.
Average Daily Usage
Units sold or consumed per day, based on recent history. Divide usage over a period by the number of days in it.
Lead Time
Days from placing the order to having stock ready to sell, including receiving and putaway, not just transit.
Safety Stock
A buffer for demand spikes and late deliveries. A common method: (max daily usage × max lead time) − (average daily usage × average lead time).
Reorder Point Example
A food-service distributor stocks 12-ounce paper cups, item CUP-12. This is how it calculates the reorder point:
| Input | Value | How It Was Found |
|---|---|---|
| Average daily usage | 40 cases | 3,600 cases sold over the last 90 days |
| Maximum daily usage | 50 cases | Busiest day in the same 90 days |
| Average lead time | 10 days | Average PO-to-receipt time on the last 8 orders |
| Maximum lead time | 12 days | Slowest of those 8 deliveries |
| Safety stock | 200 cases | (50 × 12) − (40 × 10) = 600 − 400 |
| Reorder point | 600 cases | Order trigger (40 × 10) + 200 |
When on-hand stock of CUP-12 drops to 600 cases, the buyer places a purchase order. At normal demand, about 400 cases are used during the 10-day lead time, so roughly 200 cases remain when the new stock arrives. If demand spikes or the supplier is late, the safety stock covers the gap.
Reorder Point vs. Min/Max vs. EOQ
These terms are often used together. Each one answers a different replenishment question.
| Reorder Point | Min/Max | EOQ | |
|---|---|---|---|
| Answers | When to order | When to order and how much to order up to | How much to order each time |
| Based On | Usage, lead time, safety stock | A minimum (trigger) and maximum (target) level | Annual demand, ordering cost, holding cost |
| Result | A single trigger level | Order quantity varies with on-hand stock | A fixed order quantity |
| Best For | Steady-demand stocked items | Items with limited space or shelf life | High-volume items with significant order costs |
Many companies combine them: the reorder point or minimum triggers the order, and EOQ or the maximum sets the quantity.
Benefits of Using Reorder Points
Fewer Stockouts
Orders go out while there is still enough stock to cover the lead time, so customers are not left waiting.
Less Excess Inventory
Ordering based on actual usage avoids buying too early, which frees up cash and warehouse space.
Fewer Rush Orders
Planned reorders reduce expedited freight charges and last-minute calls to suppliers.
Consistent Purchasing Decisions
Buyers follow the same rule for every item instead of relying on memory or a walk through the warehouse.
How to Set Reorder Points
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1
Start with accurate on-hand counts. A reorder point only works if the system's quantity matches the shelf. Use cycle counting to keep it that way.
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2
Pull usage history for each item. Use at least 60 to 90 days of sales or consumption, and longer for seasonal items.
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3
Measure real lead times. Compare purchase order dates to receipt dates instead of using the supplier's quoted lead time.
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4
Set safety stock by importance. Give critical, fast-moving items a larger buffer and slow movers a smaller one.
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5
Count open orders as supply. Compare the reorder point to on-hand plus stock already on order, so you don't order twice.
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6
Review on a schedule. Recalculate at least quarterly, and whenever demand shifts or a supplier's lead time changes.
Common Reorder Point Mistakes to Avoid
A reorder point is only as good as the numbers behind it.
Setting It Once and Forgetting It
Demand and lead times change. A reorder point set last year can cause stockouts or overstock today.
Using Quoted Lead Times
Suppliers often quote best-case times. Use the lead times you actually experience.
One Rule for Every Item
A flat "reorder at 100" ignores how fast each item sells. Calculate reorder points item by item.
Ignoring Seasonality
Averages from a slow season set reorder points too low for the busy one. Adjust ahead of known peaks.
Which Industries Use Reorder Points?
Any business that keeps stock on hand can use reorder points. They are most valuable where running out is costly:
Distribution
Thousands of stocked SKUs where customers expect same-day or next-day shipment.
Manufacturing
Raw materials, packaging, and supplies with steady usage that would stop production if they ran out.
Healthcare
Medical supplies where a stockout affects patient care.
Furniture & Home Decor
Imported goods with long, variable lead times that need larger safety stock.
Reorder Points in Kechie ERP
Kechie Inventory Management tracks on-hand stock, open purchase orders, and sales orders in one system, so replenishment decisions are based on current numbers. Data entered once is available in every relevant module in real time. With Kechie AI Inventory Optimization, AI-driven recommendations suggest min/max levels from historical demand and usage, and your team reviews and approves every change before it takes effect.
Frequently Asked Questions
What is a reorder point in simple terms?
A reorder point is the stock level that tells you it is time to order more. When on-hand inventory drops to that number, you place a purchase order so new stock arrives before you run out.
What is the reorder point formula?
Reorder point = (average daily usage × lead time in days) + safety stock. The first part covers demand while you wait for the order, and safety stock covers demand spikes or late deliveries.
What is the difference between a reorder point and safety stock?
Safety stock is the extra buffer you keep for surprises. The reorder point includes that buffer plus the stock you expect to use during the supplier lead time.
What is the difference between a reorder point and a min/max level?
In a min/max system, the minimum works like a reorder point and the maximum sets how much to order up to. A reorder point on its own says when to order, not how much.
How often should reorder points be updated?
Review them at least quarterly, and sooner for seasonal items or when a supplier's lead time changes. Reorder points based on old demand lead to stockouts or excess stock.
Can the reorder point be zero?
Only for items you order to demand, such as special orders or slow movers you choose not to stock. For stocked items, a zero reorder point means you will run out before new stock arrives.
Do manufacturers use reorder points?
Yes, mostly for raw materials and components with steady usage. Items driven by specific production schedules are usually planned through MRP instead.
What happens if the reorder point is set too high?
You order earlier than needed and carry extra inventory, which ties up cash and warehouse space. Too low a reorder point leads to stockouts and rush orders.
Related Guides
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