Accounting Stock Reorder Point (Annual) Calculator Examples
Worked annual reorder-point examples for steady demand, short lead times, longer lead times, and safety-stock planning.
These examples show how the annual stock reorder point calculation changes when demand, operating days, supplier lead time, and safety stock differ. Each result is a reorder trigger, not an order quantity.
Steady-demand office supplies example
A business expects to use 12,000 units over 250 operating days. Its supplier normally takes 14 operating days, and the business holds 100 units of safety stock.
Input Summary
Annual demand
12,000 units
Operating days
250 days
Lead time
14 operating days
Safety stock
100 units
Calculation Breakdown
- 1Daily demand12,000 ÷ 25048 units/day
- 2Lead-time demand48 × 14672 units
- 3Reorder pointceil(672 + 100)772 units
Result Summary
Reorder point
772 units
Accounting Stock Reorder Point (Annual) Calculator
The reorder point is 772 units, representing about 16.1 operating days of average demand.
Small business with a short lead time
A shop expects annual demand of 2,400 units across 300 operating days. Supplier lead time is 5 operating days and safety stock is 20 units.
Input Summary
Annual demand
2,400 units
Operating days
300 days
Lead time
5 operating days
Safety stock
20 units
Calculation Breakdown
- 1Daily demand2,400 ÷ 3008 units/day
- 2Lead-time demand8 × 540 units
- 3Reorder pointceil(40 + 20)60 units
Result Summary
Reorder point
60 units
Accounting Stock Reorder Point (Annual) Calculator
The reorder point is 60 units, equal to about 7.5 operating days of average demand.
Higher-volume item with a longer lead time
A business forecasts 52,000 units of annual demand over 260 operating days. The supplier lead time is 21 operating days and safety stock is 500 units.
Input Summary
Annual demand
52,000 units
Operating days
260 days
Lead time
21 operating days
Safety stock
500 units
Calculation Breakdown
- 1Daily demand52,000 ÷ 260200 units/day
- 2Lead-time demand200 × 214,200 units
- 3Reorder pointceil(4,200 + 500)4,700 units
Result Summary
Reorder point
4,700 units
Accounting Stock Reorder Point (Annual) Calculator
The reorder point is 4,700 units, or about 23.5 operating days of average demand.
Fractional result rounded up example
A business expects 10,000 units of annual demand across 240 operating days. Lead time is 7 operating days and safety stock is 50 units.
Input Summary
Annual demand
10,000 units
Operating days
240 days
Lead time
7 operating days
Safety stock
50 units
Calculation Breakdown
- 1Daily demand10,000 ÷ 24041.67 units/day
- 2Lead-time demand41.67 × 7291.67 units
- 3Reorder point before rounding291.67 + 50341.67 units
- 4Reorder pointceil(341.67)342 units
Result Summary
Reorder point
342 units
Accounting Stock Reorder Point (Annual) Calculator
The reorder point is 342 units, covering approximately 8.2 operating days of average demand.
How to Read Your Results
The stock reorder point is the available-stock level that should trigger a new purchase order.
Average daily demand is based on the annual forecast and the operating days entered; it is not a daily sales forecast.
Expected lead-time demand estimates the units likely to be used before incoming stock arrives.
Reorder-point coverage includes both lead-time demand and safety stock, expressed in average operating days.
Compare the result with current stock records, stock already on order, and operational constraints before using it in a purchasing process.
Assumptions & Important Notes
- Examples use an even demand pattern across the stated operating days.
- Lead times are stated in operating days to match the daily-demand calculation.
- Safety stock is a chosen planning buffer rather than a statistically calculated service level.
- All figures are inventory-planning estimates and use a consistent unit of measure.
Related Examples
Frequently Asked Questions
What does a reorder-point example show?
It shows how annual demand is converted to daily demand and then combined with lead time and safety stock to set an order trigger.
Why can two items have similar annual demand but different reorder points?
They may have different operating-day demand rates, supplier lead times, or safety-stock requirements.
Do I order exactly the reorder-point amount?
No. The reorder point indicates when to order. The quantity ordered is a separate inventory decision.
What happens if lead time doubles in an example?
Expected lead-time demand doubles if average daily demand stays the same, so the reorder point increases by that additional demand.
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