If you sell physical products, a reorder point is the moment when you know it’s time to buy more stock before you run out. For a small business, that can be the difference between keeping sales ticking over and missing orders because something popular has sold out.
A business stock reorder point sounds technical, but the idea behind it is simple. You decide the stock level that should trigger a reorder, based on how quickly you sell and how long it takes for new stock to arrive. Once your stock reaches that level, you place the next order.
That matters because small businesses often don’t have huge amounts of money or storage space tied up in inventory. Ordering too late risks stockouts. Ordering too early can leave cash sitting on shelves. A reorder point helps you sit somewhere in the middle.
What a reorder point actually means
A reorder point is the inventory level at which you need to replenish a product. If you sell candles, for example, and you know you usually sell 10 a week while your supplier takes three weeks to deliver, you need to reorder before you get anywhere near zero.
It is not the same as your ideal stock level, and it is not the same as your minimum order quantity. It is the trigger point that tells you, “place the order now so the new stock arrives before you run out”.
The basic formula is:
Reorder point = average sales during lead time + safety stock
Lead time is the time between ordering and receiving the stock. Safety stock is the small buffer you keep to protect yourself if sales pick up or the delivery is delayed.
Why small product businesses use reorder points
When you’re running a small product business, inventory problems can quickly become cash flow problems. If too much money is tied up in stock that isn’t moving, it can make it harder to pay for packaging, advertising, software or even the next batch of products.
A reorder point helps you make calmer, more predictable buying decisions. Instead of guessing when to reorder, you have a clear rule to follow. That is especially useful if you sell on more than one channel, such as your own website, Etsy or marketplaces where sales can jump without much warning.
It also stops you relying on memory. It is easy to think, “I’ll reorder soon”, then realise the stock is already much lower than you thought. A reorder point turns that vague feeling into a number.
If you are building a product-based business from scratch, it can help to think about stock planning at the same time as other early decisions, like your first steps in starting a planner business or choosing the right type of products to sell.
How to work out your reorder point
You do not need fancy software to get started. A notebook or spreadsheet is enough if you only sell a small number of products.
1. Find your average sales rate
Look at how many units you sell in a typical day or week. If your sales are seasonal, use a period that reflects the current demand rather than your quietest month of the year.
For example, if you sell 20 units a week on average, that gives you a starting point. If sales vary a lot, you may want to work with a slightly higher number so you are not caught short.
2. Work out your supplier lead time
How long does it take from placing an order to having stock ready to sell again? That might be five days, two weeks or longer, depending on the supplier, whether items are made to order and whether there are shipping delays.
This is one of the most important parts of the calculation because a long lead time means you need to reorder earlier.
3. Add safety stock
Safety stock is the extra buffer that protects you if demand goes up unexpectedly or delivery takes longer than expected. You do not need a huge amount, but you do need enough to give yourself breathing room.
A very simple way to estimate it is to set aside a few extra days or weeks of stock based on how reliable the product and supplier are. If demand is fairly predictable and your supplier is consistent, your buffer can be smaller. If sales are jumpy or deliveries are unreliable, your buffer should be higher.
4. Put the numbers together
If you sell 20 units a week and your supplier lead time is two weeks, you will need 40 units to cover the time between order and delivery. If you also want 10 units of safety stock, your reorder point is 50 units.
That means once your stock drops to 50 units, you reorder. By the time your new stock arrives, you should still have enough left to keep selling.
A simple example of reorder point planning
Imagine you sell handmade notebooks. You usually sell 30 a month. Your supplier takes three weeks to deliver the paper, covers and packaging you need for the next batch, and you want to keep at least 10 notebooks in reserve so you are not panicking if orders pick up.
If your average sales during those three weeks are about 22 or 23 notebooks, your reorder point would be around 32 or 33 notebooks. When your stock falls to that level, you place the order.
That gives you a much clearer buying decision than waiting until you are down to five notebooks and hoping the supplier can move faster than usual.
When a reorder point is useful, and when it is less helpful
Reorder points work best for products you sell regularly. If you have a steady bestseller, a repeatable supply chain and a decent idea of demand, the method is very practical.
They are less straightforward for one-off products, highly seasonal ranges or items with very unpredictable demand. If you sell lots of different products and each one sells at a different pace, you may need separate reorder points for each item rather than one rule for the whole business.
They can also be less useful if your stock is made to order and you are not holding much finished inventory. In that case, your planning may focus more on raw materials and production time than on finished stock levels.
What can throw your reorder point off
Even a well-calculated reorder point can go wrong if you set it once and never look at it again. Sales change. Suppliers change. Lead times change. That means your reorder point needs to move with your business.
One thing to watch out for is running the numbers using old sales data when demand has already increased. If a product is suddenly trending, last month’s average sales may underestimate what you need now.
Another common issue is forgetting about delays that are outside the supplier’s control, such as shipping disruption, bank holidays or busy seasonal periods. If those delays happen often, your safety stock should reflect them.
And if you’re selling across more than one channel, remember that total stock can disappear faster than you expect. A product might sell slowly on one platform and quickly on another, so it helps to keep a single stock record rather than guessing separately for each channel.
How reorder points help cash flow
Small businesses often need to be careful about when money goes out. Ordering stock too soon means cash is tied up earlier than necessary. Ordering too late can mean missed sales, and missed sales are expensive in their own way.
A sensible reorder point helps you avoid both problems. You are buying stock at the moment it becomes necessary, not because you feel nervous, and not so early that you end up with boxes of unsold products gathering dust.
That can be especially helpful if you are trying to build a side hustle alongside other income, because stock decisions affect how much money you have available for other parts of the business. If you are still at the stage of weighing up what to sell, it may help to look at some money making business ideas before committing to a product line.
Using reorder points without overcomplicating things
You do not need an inventory system that makes your head spin. Start with your best-selling product, estimate your normal sales rate, add the supplier lead time and keep a buffer. That is enough to get a working reorder point in place.
If you only sell a handful of items, a spreadsheet can do the job. If you sell more products as the business grows, inventory software may save time and reduce mistakes, but you do not have to start there.
The main thing is to have a rule you can actually use. A perfect calculation that never gets updated is less helpful than a simple one you check each week.
If your business is still in the early stages and you want to keep overheads down, it can help to look at practical setup costs as well as stock control. For some product businesses, even small decisions such as packaging, storage and transport matter. If you work on the move, for example, you might also find our guide to getting an affordable campervan for working on the road useful for thinking through logistics.
When to review your reorder point
A reorder point should not be fixed forever. Review it when sales change, when your supplier changes lead time, when you launch a promotion or when a product becomes more popular than usual.
If you are having to reorder far too often, your trigger point may be too low. If you are sitting on too much stock, it may be too high. The right number is the one that helps you keep selling without overbuying.
For businesses that rely on repeat orders from suppliers, this kind of planning becomes part of the routine. It is also useful when you are choosing tools and accounts to support the business, such as a business bank account. If that is on your list, our Tide business bank account review may be a useful read.
For many small product businesses, a reorder point is one of those simple systems that quietly makes everything else run more smoothly. It does not need to be complicated. It just needs to be based on real sales, real lead times and a bit of buffer so you are not constantly scrambling for stock.
Once you have that in place, it becomes much easier to keep products available, plan your cash flow and make sensible decisions about when to buy more. If you later expand into other products or services, you can build on the same habit of planning ahead, whether that means selling online, starting a small business or adding another income stream alongside it.
