Why Is Inventory Management Different for Repair Shops?

Repair shop inventory management is more complex than retail because you carry thousands of SKUs across hundreds of device models, mix fast and slow-moving parts, and must balance OEM versus aftermarket quality decisions — all while keeping cash tied up in stock to an absolute minimum. A clothing retailer carries maybe 200 SKUs. A busy repair shop can easily carry 3,000 or more — and every one of those SKUs has to be matched to the right device, the right model variant, the right colour in some cases. An iPhone 14 screen is not an iPhone 14 Plus screen. A Samsung Galaxy S23 battery is not an S23 Ultra battery. Getting the wrong part in either costs you twice: once to buy the wrong part, and…

How much should a repair shop spend on parts inventory each month?

Parts restock for a busy single-location repair shop typically runs £1,600–£5,500 per month (equivalent to approximately $2,000–$7,000 USD), depending on repair volume, device mix, and whether you carry OEM or aftermarket stock. A shop doing 20 repairs per day will spend significantly more than one doing 8, and shops in premium locations that offer OEM-only repairs will carry higher-value stock. Start by calculating your average repair count per day, your average parts cost per repair, and add 20% buffer for safety stock and the occasional special order.

What is a good parts wastage rate for a repair shop?

A well-run repair shop should target parts wastage below 3% of total parts expenditure. Above 5% indicates a systemic problem — whether in handling, quality control, supplier selection, or stock management. Wastage includes parts damaged during repair, parts that fail under warranty and require free replacement, and stock that's been miscounted or gone missing. Track this monthly, broken down by technician and by parts category. A high wastage rate in one category often points to a single root cause.

Should repair shops buy OEM or aftermarket parts?

For high-value flagship repairs — particularly current-generation iPhone and Samsung screens — OEM or OEM-equivalent quality is the safer choice despite higher cost. For mid-range devices and B-item parts, quality aftermarket (Grade A) offers acceptable quality at better margins. The key is transparency with customers: always communicate which type of part you're fitting, and price accordingly. A customer who chose aftermarket knowingly is not a customer who'll dispute the quality later.

How do you track parts inventory in a repair shop?

Repair shop inventory is best tracked with specialist repair management software that decrements stock automatically when a job is closed, flags reorder points, and supports serialised tracking for components like screens and batteries. Spreadsheets work at very low volume but fail as SKU count grows — the manual update burden becomes a source of errors. cellbot's inventory module integrates with the repair workflow so stock levels stay accurate without a separate data entry step.

What parts should a repair shop always have in stock?

The core always-in-stock list for a UK repair shop covers: iPhone screens for the three most recent generations, Samsung Galaxy S-series and A-series screens for the same period, iPhone and Samsung batteries for popular models, and charging port assemblies for high-volume handsets. Screens account for 62% of repair volume, batteries for roughly 15% of revenue, and charging ports for around 26% of visit types. If you run out of any of these on a busy day, you'll turn away revenue you can't recover.

How do I deal with new device model releases and inventory planning?

When a new flagship device releases, expect repairs to begin appearing 4–8 weeks after launch, once the first wave of accidents occurs. Pre-stock screens and batteries 2–3 weeks after release based on your local sales volume for the brand, and add the new model to your reorder point calculations immediately. Don't wait for the first customer to arrive. By then, parts suppliers are also trying to catch up with demand and lead times stretch. The shops that get ahead of new model cycles — even stocking a few units before they technically need them — capture jobs from shops that are still waiting for delivery.

What's the risk of slow-moving stock in a repair shop?

Slow-moving stock ties up cash, takes up storage space, and — for batteries specifically — degrades with age before it's ever fitted. Parts that haven't moved in 90 days should be reviewed. Options: liquidate through eBay or wholesale channels, offer a discount on repairs using that part to clear it, or return to supplier if within the return window. Some C-item stock is unavoidable; the goal is to minimise it rather than eliminate it entirely.

Repair Shop Inventory Management: Stop Losing Money on Parts

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Part Type	Cost (screen, iPhone 15)	Sale Price	Gross Margin
Apple OEM	~£180	£249	28%
OEM-Equivalent OLED	~£90	£199	55%
Quality Aftermarket LCD	~£35	£149	77%

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Feature	cellbot	RepairDesk	Orderry
Automatic stock decrement on job close	Yes	Yes	Yes
Serialised part tracking	Yes	Partial	Partial
Reorder point alerts	Yes	Yes	Yes
Supplier purchase orders	Yes	Yes	Yes
Multi-location stock	Yes	Yes	Yes
OEM vs aftermarket part tiering	Yes	No	No
Parts wastage reporting	Yes	No	No
Pricing integration (instant quotes from stock)	Yes	No	No

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Repair Shop Inventory Management: Stop Losing Money on Parts

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