Phones break constantly—and your repair business lives or dies on having the right parts when customers walk in. Poor stock planning costs you lost sales, frustrated customers, and dead cash tied up in slow-moving inventory.
Why Phone Repair Inventory Fails
Most repair shop owners stock either too much (draining cash) or too little (losing jobs to competitors). The problem isn't complexity—it's that phone repair demands specificity. You can't just "stock phone screens"; you need iPhone 14 Pro Max OLED displays, Samsung Galaxy A52 LCDs, and Google Pixel 6a assemblies in the right quantities. One miscalculation per part type multiplies across dozens of models and suppliers.
Start with Your Repair Volume Data
Before buying a single part, audit your last 90 days of repair tickets. Extract:
- Which devices you actually repair (iPhone 13, 14, 15; Samsung A series, S24; etc.)
- Which components fail most (screens, batteries, charging ports, cameras)
- Repair frequency per model (iPhone 13 screens might be 8/week; Pixel 7a batteries only 2/week)
- Turnaround time you promise customers
This data tells you what to stock and how much. If you repair 5 iPhone 15 screens weekly, keeping 6–8 units on hand covers normal demand plus one slow week. Carrying 20 units locks $2,000–3,000 in dead stock; carrying 2 units means you reject jobs.
Categorize by Demand Tier
Segment your parts into three groups:
- Tier 1 (Fast-movers): Parts you use 5+ times per week. Stock 2–4 weeks' worth. iPhone screens, common batteries, chargers.
- Tier 2 (Steady demand): Parts you use 1–4 times per week. Stock 1–2 weeks' worth. Tablet screens, less common phone batteries, camera modules.
- Tier 3 (Occasional): Parts you use fewer than once per week. Stock only if you have regular customers requesting them; otherwise, order on-demand. Rare model screens, specialized flex cables.
Tier 1 parts typically account for 70% of repair revenue but only 30% of your SKU count. Focus cash and warehouse space there.
Set Reorder Points and Lead Times
Know your supplier's lead times. Most reputable parts suppliers (EsSources, Alibaba, local distributors) ship in 3–7 days domestically; international orders may take 2–4 weeks. Set a reorder point: when stock hits that level, place a new order.
Example: You use 8 iPhone 15 screens per week, supplier takes 5 days to ship.
- Weekly usage: 8 units
- Lead time coverage: 5 days ÷ 7 days/week = 0.71 weeks ≈ 6 units needed in transit
- Safety buffer (1 week extra): 8 units
- Reorder point: Place a new order when you hit 14 units on hand
This prevents stockouts without over-ordering.
Budget Realistically
Phone parts aren't cheap, and cash flow matters. A small shop servicing 20–30 phones weekly might need:
- Initial stock investment: $3,000–8,000 (depending on device mix and supplier relationships)
- Monthly replenishment: $1,500–3,500 (for Tier 1 and 2 parts)
- Working capital needed: 2–3 weeks of parts cost on hand
Negotiate with suppliers for bulk discounts after proving volume. Many offer 5–15% off at 10+ unit orders.
Use Inventory Management Tools
Spreadsheets work initially but break at scale. Simple tools like:
- Shopify inventory (if you sell online)
- Square for Retail (free with card processing)
- Toast POS (restaurant-grade, works for retail)
- Zoho Inventory (low-cost, good reporting)
Track stock levels, auto-alert reorder points, and show which parts are stagnant. Stagnant stock is money buried.
Listing your repair services and parts on Mercoly also helps—you'll get found by customers searching for specific repairs, win leads based on what you actually stock, and can sell excess inventory to other shops.
Frequently Asked Questions
Q: How often should I count physical inventory? Weekly for Tier 1 parts, monthly for others. Shrinkage (lost, damaged, or misplaced parts) adds up fast in repair shops.
Q: Should I stock parts for devices I rarely repair? Only if a customer requests it regularly or you can special-order within 24 hours. One-off requests drain capital.
Q: What should I do with slow-moving stock? After 60 days unsold, liquidate at cost or slight loss—cash flow beats carrying costs. Use future data to avoid the mistake again.
Start auditing your last quarter's repairs this week.