A shop selling 20 units a day with a four day supplier lead time will run out if it waits until 80 units remain to order, because those 80 units cover only the expected sales while the order is in transit, with nothing left for a late delivery or a busy week. Add 40 units of safety stock, and the reorder point becomes 120 units, a number that protects the shop through the normal range of variation. That single calculation, done for each important product, shows how to set inventory reorder points small shop owners can use, and it is the difference between a shop that reorders calmly and a shop that apologises to customers.
If you want to learn how to set inventory reorder points small shop owners can rely on, start with that formula and then fix the inputs, because a correct formula with guessed inputs still produces stockouts.
A reorder point is simply the stock level that triggers a new order. It is not a guess, and it is not the same as a minimum stock level you hope never to reach. When usable stock falls to the reorder point, you order. When it falls below it, you are already late, because the lead time clock started earlier than you acted. Many small shops set reorder points by feel, ordering when the shelf looks empty, and that habit works until a supplier delay, a promotion, or a seasonal surge arrives in the same week.
This guide shows how to set inventory reorder points small shop owners can finish, giving you a complete method you can finish in an afternoon. It covers how to measure daily sales and lead time honestly, how to set safety stock without guessing, a decision table you can copy for your own products, worked examples for three shop types, order quantities, review routines, and the tools that automate the trigger. Figures for formulas come from standard inventory practice as described in Shopify and other reputable guides, and where a figure is reported from a third party guide rather than a vendor page, this guide says so plainly. Confirm any tool feature on the vendor page before you buy.
How to Set Inventory Reorder Points Small Shop Owners Can Calculate in an Afternoon
The method has five steps, and each step takes less time than most owners expect once the sales data is in front of them. Work through one product first, preferably your best seller, then repeat the same steps for the next ten products, then for the rest of the range in batches.
- Measure average daily sales for the product over the last 90 days, excluding any one off bulk order that would distort the average.
- Measure lead time in days from placing the order to having stock ready to sell, including supplier processing, shipping, and your own receiving and shelving time.
- Choose safety stock from the variation you actually see, using the simple method in this guide, not a percentage copied from another business.
- Calculate the reorder point as average daily sales multiplied by lead time in days, plus safety stock, and round the result up to a whole case pack where your supplier sells in packs.
- Write the reorder point into your inventory system or onto a stock card, set a low stock alert at that level, and review it monthly or after any change in sales or supplier speed.
That sequence is the whole system at its simplest, and it is the system this guide builds out in detail. The rest of the guide explains how to get each input right, because most reorder point failures are input failures. A shop that measures sales over too short a period, forgets receiving time in lead time, or sets safety stock to zero will get a tidy number that fails in practice.
Measure Daily Sales at the Right Level
Daily sales is the first input, in learning how to set inventory reorder points small shop owners can trust, and it must be measured at the level you actually order. A shop that sells candles in three scents cannot set one reorder point for candles in general, because one scent may sell eight a day while another sells one a week. Set the point per variant, per size, and per colour where those differences change ordering, because mixing variants together hides the fast seller inside an average that looks safe.
Use 90 days, and handle spikes honestly
Use the last 90 days of sales as your starting window for most products, because it is long enough to smooth out weekly patterns and short enough to reflect how the shop trades now. Divide total units sold in that window by the number of selling days, not by calendar days, if your shop closes on certain days, because dividing by days you were closed understates daily demand on the days you are open. For a seasonal product, use the same 90 days from last year as a second check, and use the higher of the two figures during the run up to the season.
Handle spikes by asking whether the spike will repeat. A bulk order from one customer, a press mention, or a one day promotion is not a new daily rate, and including it in the average will leave you overstocked for months. A sustained rise after a new listing, a new wholesale customer, or a permanent price change is a new rate, and it should enter the average. When in doubt, calculate the average twice, once with the spike and once without, and use the version without the spike for the reorder point while keeping a note to revisit it if sales stay high.
Separate average sales from peak sales
Average sales drive the reorder point, but peak sales drive safety stock, so you need both numbers. Record the highest daily sales in your 90 day window, and the highest weekly sales, because a product that averages five a day but sells twenty on a Saturday behaves differently from a product that sells five every day. The gap between average and peak is the variation your safety stock must cover, and a product with a wide gap needs a larger buffer than a steady seller with the same average.
Do not use a single shop wide average for every product. A shop wide figure flatters slow products and starves fast ones, and it is the most common reason a reorder system looks correct on paper while the best sellers still run out. Work product by product, even if that means starting with only your top twenty products and adding the rest over the following weeks. Twenty correct reorder points protect more revenue than two hundred guessed ones.
Measure Lead Time Honestly
Lead time is the number of days from placing an order to having stock ready to sell, in learning how to set inventory reorder points small shop lead times must cover, and most shops understate it by forgetting the steps at either end. Supplier processing time, the time the order sits waiting for payment clearance or for a case pack to be picked, shipping time, and your own receiving, checking, and shelving time all belong in the figure. A supplier that ships in two days is not a two day lead time if you need another day to receive and shelve the delivery.
Break lead time into its parts
Write lead time as four parts, and measure each one from your last three orders. Order processing is the time from your order to the supplier confirming dispatch. Transit is the time from dispatch to delivery at your door. Receiving is the time from delivery to stock being checked and shelved. Buffer is a small allowance for the supplier being closed on a weekend or a public holiday during the order window. Add the four parts, and use the total as your lead time, because the reorder point must cover sales during all four parts, not only during transit.
Record the longest lead time you saw in those three orders as well as the average, because safety stock must cover the slow delivery, not only the typical one. If your average lead time is seven days but one order took twelve, a reorder point built on seven days will fail whenever that slow delivery repeats. Use the average for the main calculation, and use the gap between average and longest lead time when you set safety stock, as the next section explains.
Confirm lead time with the supplier
Ask each key supplier for their current processing time and for any minimum order or case pack rule, and note whether those rules change at busy times of year. A supplier that processes in one day in February may take four days before a holiday season, and a reorder point set in February will be too low in November. Note the supplier contact, the order cutoff time, and the delivery days, because an order placed after cutoff effectively adds a day to lead time, and a delivery that only arrives on Tuesdays adds waiting time that transit figures never show.
Set Safety Stock Without Guessing
Safety stock is extra stock held, in learning how to set inventory reorder points small shop buffers require, to cover variation in demand, variation in lead time, or both. It is not a comfort blanket, and it is not a percentage to copy from another shop. A shop with steady sales and a reliable supplier needs little safety stock, while a shop with spiky sales and a slow supplier needs a lot, even when both shops sell the same number of units per day. The right amount follows from the variation you measured, not from a rule of thumb.
Use the simple small shop method first
For most small shops, a simple method is accurate enough and far better than no buffer at all. Take the highest daily sales you recorded, subtract average daily sales, and multiply the result by the longest lead time you recorded. That gives a safety stock figure that covers a sustained run at peak sales during a slow delivery, which is the realistic worst case for a small shop. The formula is reported in several inventory guides, and it is simple enough to recalculate by hand whenever sales or lead time change, so confirm the method suits your product mix before relying on it for perishable goods.
Work the example from the opening. Average sales of 20 units a day, highest daily sales of 30 units, and a longest lead time of four days give safety stock of 40 units, from 30 minus 20 multiplied by four. Add that to lead time demand of 80 units, from 20 multiplied by four days of average lead time, and the reorder point is 120 units. If your product expires, or if holding extra stock ties up cash you need elsewhere, use a smaller buffer and accept a higher stockout risk for that product, but make that trade off explicitly rather than by setting safety stock to zero by default.
When to use a statistical method instead
A statistical method, using standard deviation and a service level factor, suits a shop with a large range, a long sales history, and products where a stockout is expensive. In that method, a service factor of 1.65 is commonly reported for a 95 percent service level, meaning the shop aims to meet demand from stock about 95 times in 100, and the safety stock grows with the variability of demand and lead time. That method needs clean daily sales data and a spreadsheet, and it is overkill for a shop with twenty products and a simple range, so start with the simple method and move to statistics only for your highest value products.
Do not set safety stock once and forget it. Recalculate it when a product moves from steady to spiky, when a supplier becomes less reliable, or when the cost of a stockout rises, for example when a product becomes a key driver of repeat visits. Safety stock is a decision about risk and cash, and it should change when either side of that decision changes.
The Reorder Point Decision Table
This table is the overview proof element for this guide to how to set inventory reorder points small shop owners can copy. Find the row closest to your daily sales and lead time, read across to the safety stock column, and use the reorder point in the final column as your starting figure. The safety stock figures below are worked examples based on the simple method in the previous section, with a stated buffer for each row, and you should replace them with your own measured safety stock before you rely on the table for ordering.
| Daily sales | Lead time days | Safety stock | Reorder point |
|---|---|---|---|
| 5 units | 7 days | 15 units | 50 units |
| 10 units | 7 days | 20 units | 90 units |
| 10 units | 14 days | 30 units | 170 units |
| 20 units | 7 days | 40 units | 180 units |
| 20 units | 14 days | 60 units | 340 units |
| 50 units | 10 days | 100 units | 600 units |
Check the arithmetic on any row before you copy it, because the habit of checking is the habit that keeps a reorder system honest. For the 10 units a day row with a 14 day lead time, lead time demand is 140 units, plus 30 units of safety stock gives 170 units. For the 50 units a day row with a 10 day lead time, lead time demand is 500 units, plus 100 units of safety stock gives 600 units. When your own figures fall between rows, calculate your exact point from the formula rather than rounding to the nearest row, because rounding down on a fast seller is how a stockout starts.
Worked Examples for Three Shop Types
Examples make the formula concrete, and each example below uses the same steps in the same order, so you can follow one and then apply it to your own best seller. Keep your own worked example beside the product in your inventory system, because a reorder point without its working is hard to update when sales change.
A candle shop with a steady seller
A candle shop sells an average of 12 units a day of its best selling scent, with a highest daily sale of 18 units, and a supplier lead time averaging seven days and reaching ten days at its longest. Lead time demand is 84 units, from 12 multiplied by seven. Safety stock by the simple method is 60 units, from 18 minus 12 multiplied by ten. The reorder point is therefore 144 units, and the shop orders when usable stock, meaning stock on hand plus stock already on order minus any damaged or reserved units, falls to 144.
The shop rounds up to a case pack of 150 units for the order quantity, and the extra six units sit in safety stock rather than distorting the trigger.
A bike parts shop with a slow supplier
A bike parts shop sells an average of four units a day of a popular brake pad, with a highest daily sale of nine units, and a lead time averaging fourteen days and reaching twenty one days at its longest. Lead time demand is 56 units, from four multiplied by fourteen. Safety stock is 105 units, from nine minus four multiplied by twenty one, which looks large until you remember that a three week delivery during a busy period can consume far more than the average. The reorder point is 161 units, and the shop accepts the higher stock holding because a missing brake pad loses a repair job, not only a parts sale.
For a low value, fast moving part, that trade off is usually correct.
A coffee shop selling beans to take home
A coffee shop sells an average of 25 bags of beans a day to take home, with a highest daily sale of 35 bags, and a lead time averaging five days and reaching seven days at its longest. Lead time demand is 125 bags, from 25 multiplied by five. Safety stock is 70 bags, from 35 minus 25 multiplied by seven. The reorder point is 195 bags, rounded up to 200 bags for a tidy order quantity. Because beans have a roast date and a freshness window, the shop also sets a maximum stock level, so a reorder triggered early by a promotion does not leave stale beans on the shelf, a point the next section covers.
Order Quantity, Maximum Stock and Review Routine
A reorder point tells you when to order, but it does not tell you how much to order, and the two decisions together determine both stockouts and cash tied up in stock. Order quantity should reflect supplier case packs, storage space, cash flow, and expiry, in that order for most small shops. A mathematically ideal order quantity that ignores a case pack of 48 units, or a shelf that holds only 100 units, is not ideal in practice.
Set a maximum level as well as a trigger
Set a maximum stock level as the reorder point plus the order quantity, minus the lowest sales expected during lead time, following the method reported in Shopify min max guidance. In simpler terms for a small shop, maximum stock is roughly the reorder point plus one normal order, and it stops a well meaning reorder from overfilling the shelf after a quiet week. When stock falls to the reorder point, order enough to bring stock back toward the maximum, not enough to fill every shelf to the brim. That discipline matters most for perishable goods, fashion sizes, and any product where an unsold unit loses value quickly.
Review reorder points monthly for your top products, and quarterly for the rest of the range, and review immediately after a supplier change, a price change, a promotion, or a sustained sales shift. A review need not take long. Update average daily sales, update lead time from the last three orders, recalculate safety stock, and change the trigger in your system. Log the date and the reason for any change, because a reorder point that changes without a note will be changed back by the next person who thinks the old figure looked right.
Classify products so effort goes where it matters
Use a simple ABC classification to focus effort. A products are the small number of lines that drive most of your revenue or margin, and they deserve weekly checks, tight safety stock, and a named backup supplier. B products are steady mid range lines, checked monthly, with the standard method in this guide. C products are slow, low value lines, checked quarterly, often with a simple min max rule or a bulk order when they run low, because the cost of calculating a precise point exceeds the value of the stock. That classification keeps the system maintainable, which is the real test, because a system that takes a day a week to maintain will be abandoned.
Tools That Automate the Trigger
A spreadsheet works for a shop with twenty products, in learning how to set inventory reorder points small shop spreadsheets support, and it is the right starting point, because it forces you to understand the formula before you automate it. When the range grows, or when stock moves across two locations, or when online and in store sales draw on the same stock, a tool that tracks usable stock and alerts at the reorder point saves both time and stockouts. The tools below are named because small shops commonly use them for inventory tracking, and their current features and prices should be confirmed on the vendor page before you buy.
Shopventory is commonly used by small retailers and food businesses to track inventory across locations, set low stock alerts, and link sales data to stock levels. Its value for reorder points is the alert itself, because an alert that fires when usable stock hits the trigger removes the need for a daily shelf check. Cin7 is commonly used by growing product businesses that need purchase orders, stock across warehouses, and supplier management in one system, and it suits a shop that has outgrown a spreadsheet and needs a formal purchase order workflow.
Zoho Inventory is commonly used by small businesses that already use other Zoho tools, and it offers low stock alerts, purchase orders, and multi channel stock tracking in a system a small team can learn quickly. Square Inventory is commonly used by shops that already take payments through Square, and it tracks stock as items sell through the point of sale, which keeps the stock figure close to reality without a separate stock count after every sale. Choose the tool that matches how you already sell, because a tool that requires double entry of every sale will be abandoned within a month.
Mistakes That Undo a Good Reorder Point
The first mistake, for shops learning how to set inventory reorder points small shop stock counts affect, is counting shelf stock instead of usable stock. Damaged units, expired units, units reserved for a customer order, and units held for quality checks are not available to sell, and a reorder point based on shelf count will trigger too late. Count usable stock only, meaning stock on hand minus damaged, expired, and reserved units, plus stock already on order that you are confident will arrive on time. A purchase order with no confirmed delivery date is not usable stock, and it should not delay a reorder.
The second mistake is setting one reorder point for a product family instead of per variant, which the earlier section covered, and the third is forgetting seasonality. A reorder point set in a quiet month will be too low in a busy month, and a point set in a busy month will overstock the shop in a quiet month. Build a seasonal note into each A product, with a higher trigger for the peak period and a date to switch back, rather than changing the figure in a panic when the peak arrives.
The fourth mistake is never reviewing the point, so a product that doubled in sales still carries a trigger set when it sold half as much, and the shop learns about the gap only when the shelf empties.
Frequently Asked Questions
What is the reorder point formula for a small shop
The formula is average daily sales multiplied by lead time in days, plus safety stock. Lead time demand covers expected sales while the new order is in transit and being received, and safety stock covers variation in sales or lead time. Use usable stock, meaning stock on hand plus confident inbound stock minus damaged and reserved units, when you compare stock against the trigger, because shelf count alone overstates what you can actually sell.
How is safety stock different from a reorder point
Safety stock is the buffer inside the reorder point, not a separate stock level. The reorder point equals lead time demand plus safety stock, so safety stock is the extra units that protect you when sales run higher than average or delivery runs later than average. Without safety stock, the reorder point covers only the average case, and any variation at all produces a stockout. With too much safety stock, cash sits on shelves in products that may expire or go out of fashion.
How often should I recalculate reorder points
Recalculate A products monthly, B products quarterly, and any product immediately after a supplier change, a sustained sales change, a promotion, or a price change that affects demand. A monthly review of your top twenty products takes less than an hour once the sales data is in a spreadsheet, and it prevents the slow drift that causes most stockouts. Log each change with a date and a reason, so the next review can see why the trigger moved.
Should I include stock on order in my reorder point check
Yes, include stock on order only when the delivery date and quantity are confirmed, and exclude it when the order is unconfirmed or the supplier has not given a date. The correct comparison is inventory position, meaning stock on hand plus confirmed inbound stock minus backorders and reserved units, against the reorder point. Counting unconfirmed orders as stock is a common cause of late reorders, because the shop believes help is coming when no delivery is actually scheduled.
What if my supplier sells only in case packs
Round the reorder point up to the next whole case pack for the trigger check, or keep the exact trigger and round the order quantity up to a case pack, and be consistent about which rule you use. Rounding the trigger up is simpler for a small shop, because the alert fires at a stock level you can actually order from. Record the case pack size beside the product, so a new team member does not order a quantity the supplier cannot fulfil.
Do I need inventory software to set reorder points
No, not to start. A spreadsheet with daily sales, lead time, safety stock, and the calculated trigger is enough for a shop with a modest range, and it teaches the method better than software that hides the calculation. Move to software when the range grows, when stock sits in two locations, or when online and in store sales draw on the same stock and manual counts fall behind. Choose software that alerts at your trigger and tracks usable stock, not software that only counts what was sold.
More Reading on Stratilyze
For related shop operations, read best point of sale system for coffee shops and best online ordering software for bakeries. For payment and store fixes, see fix Square card reader not connecting for a small business and switch Squarespace to Wix for a small store.