If you run a small shop, a workshop or sell online, you already know: between November and Epiphany more stock arrives than ever. And very often it fits neither in the premises nor at home.
A storage unit can be a temporary solution for those months. Here is when it pays off, what size you usually need and how to organise it so that it helps you sell rather than waste time.
The dates that mark the campaign
This year, Black Friday falls on Friday 27 November and Cyber Monday on Monday 30 November. Many shops also bring their offers forward to the first weeks of November and extend the campaign through that whole week.
Then come Christmas and Epiphany, on 6 January. And in January, the returns.
In short: the stock usually arrives in early November and is not cleared until after Epiphany. That is around two or three months in which you need more space than usual.
Be careful not to buy too much. According to the Holiday Retail 2026 study by Shopify, reported by the magazine Emprendedores, 78% of online shops expect to sell more this Christmas, but 58% of consumers say the economic situation has affected their buying plans. Work out your stock prudently.
When a storage unit pays off
A storage unit makes sense when:
- You need the extra space only for a few months, not all year.
- Your premises are small and the boxes take up room you need for serving customers or displaying products.
- You sell online from home and the living room has become a warehouse.
- You want to keep the goods separate from your workspace or your home.
If the volume is very large, or you need someone to receive, prepare and send the orders for you, a logistics service may suit you better. For a small business or a self-employed person who manages everything, a nearby storage unit is usually the simplest option.
Before renting, ask about the minimum term of the contract and the notice period for giving it up. If you only want it until January or February, make sure it does not tie you down any longer.
What size you need
Do a quick calculation: how many boxes or parcels you expect to have at the busiest moment, usually in mid-December. And add room to move around, because you will be going in and out a lot.
- Closet (1.5–2.5 m²): a small online shop with a few dozen boxes of lightweight products, such as clothing, books or cosmetics.
- Walk-in closet (3.5–5 m²): a neighbourhood shop with varied stock and a shelf or two, or a workshop with materials and prepared orders.
- Room (5–8 m²): several hundred product lines, bulky items or material for a Christmas market stall.
- Studio (from 8 m²): the complete stock of a business, pallets or display furniture.
If you are torn between two sizes, think about the aisle. A unit packed right up to the door is fine for storage, but not for finding an order in five minutes.
How to organise it so you can prepare orders quickly
What really saves time during the campaign is knowing where everything is:
- Shelving from day one. It makes use of the height and avoids towers of boxes that have to be taken apart.
- Best sellers within reach: at eye level and near the door.
- Large labels on each box and shelf, with the reference or product. If you manage stock with a spreadsheet, note the location too.
- A packing area if there is room: a folding table with empty boxes, tape and filler.
- A separate area for returns, so they do not get mixed up with new stock in January.
- Nothing directly on the floor: a pallet or the bottom shelf protects the goods from damp.
What to ask before renting
For a business, not all storage units are equal. Before deciding, it is worth asking:
- Access hours. If you prepare orders first thing in the morning or on Sundays, check that you can get in.
- Loading and unloading. Whether you can park nearby, and whether there is a goods lift or trolleys.
- Receiving parcels. Some sites accept deliveries from suppliers and others do not.
- What can be stored. Ask whether there are restrictions on flammable products, food or other items.
- Insurance. What it covers, up to what value, and whether it includes business stock. Compare it with your business insurance.
- Invoice. Ask for it in your business's name. Your accountant (gestoría) will tell you how to account for it in your taxes.
An example in Madrid
Imagine an online shop selling handmade ceramics, run from a flat in Madrid. In November it receives twice the usual number of pieces and there is no longer room to walk through the home.
She compares two options: Trasteros Serrano, cheaper but open only Monday to Friday, and Trasteros Box, a little dearer, with access every day and parking for loading. As she prepares orders at weekends, the second one pays off. She chooses a Closet with two shelves and a folding table, and gives it up in mid-January, once the returns have arrived.
You can compare sizes, prices and opening hours in the storage units in Madrid on the portal.
And in January, tidy up before giving it up
Once Epiphany has passed, take stock: what has sold, what is left over and what has come back. It will help you work out the stock for the next campaign more accurately.
And if you have a lot of goods left over, decide whether it still pays to keep the storage unit or to move to a smaller one until spring.
