Planning Inventory for New Store Openings: A Practical Guide for Growing Apparel Brands

The new store planning challenge

Opening a new retail store is an exercise in planning without data. Every other store in your portfolio has sell-through history, size curve data, customer traffic patterns, and category mix information. A new store has none of this.

You need to decide:

• →How wide should the assortment be?
• →How deep should the inventory be?
• →What size distribution should you use?
• →How much cash should you commit?

And you need to make all these decisions 3–6 months before the store opens — before you have a single data point from the location.

This guide covers practical approaches for making these decisions intelligently.

Step 1: Find your proxy store

The most reliable way to plan for a new store is to find an existing store that closely matches the new location's characteristics:

Matching criteria (in order of importance)

1. →Customer demographic: Similar income, age, and lifestyle profile
2. →Trade area type: Urban vs. suburban vs. outlet vs. tourist
3. →Store size: Similar square footage (within 20%)
4. →Channel competition: Similar competitive landscape nearby
5. →Climate: Similar weather patterns (affects category mix)

If you have 10+ stores, you can use store clustering data to identify which cluster the new store most likely belongs to. Plan the new store using that cluster's assortment rules and size curves.

If you have fewer than 10 stores, pick the single best proxy and use its data as your starting point.

What to borrow from the proxy

• →Category mix: If your proxy does 35% tops, 25% bottoms, 20% outerwear, 15% accessories, 5% other — start with that mix
• →Size curve: Use the proxy's actual sell-through-based size distribution
• →Price point distribution: If the proxy sells 60% at $80–120, 30% at $120–180, 10% at $180+ — mirror that
• →Sell-through rates: Use the proxy's historical sell-through by category as your planning target (then apply a 10–15% discount for the new store's ramp-up period)

Step 2: Right-size the assortment

The over-assortment trap

The temptation is to make a great first impression by filling the new store with your full assortment. This is the most expensive new-store planning mistake:

• →Full assortment means wider buy, which means more cash committed
• →Shallow depth across a wide assortment guarantees stockouts on winners and excess on losers
• →You don't know what the local customer wants — offering everything means you can't read the signal

The better approach: Start narrow, go deep

Launch assortment: 60–70% of your full line

• →Core performers (top 30% by sell-through across your portfolio): Full depth
• →Seasonal key items (15–20 proven seasonal styles): Moderate depth
• →Test styles (5–10 styles that represent new categories or extensions): Minimal depth
• →Exclude: Slow sellers from other stores, niche categories, extreme price points

Week 4–8 adjustment: Based on first month sell-through, add categories or styles that are requested or that perform well at the proxy store but weren't included in the launch.

Season 2: By your second season, you have real data. Adjust the assortment based on what actually sold.

Step 3: Set buy depth

The 60/25/15 rule

For a new store, structure your inventory investment:

• →60% in proven core: Styles that sell well across your portfolio. Deep inventory. Low markdown risk.
• →25% in seasonal key items: Trend-relevant styles with moderate confidence. Medium depth.
• →15% in test/newness: Unproven styles or new categories. Minimal depth. Accept that 40–50% of test inventory may markdown.

Calculating total investment

Use your proxy store's revenue per square foot as the baseline:

1. →Proxy store revenue per sqft per month: $X
2. →New store sqft: Y
3. →Expected monthly revenue: X × Y × 0.85 (15% new-store discount for ramp-up)
4. →Target WOS at opening: 10–12 weeks
5. →Opening inventory = Expected monthly revenue × (WOS ÷ 4) ÷ margin rate

For a 1,500 sqft store with the proxy doing $40/sqft/month at 60% margin:

• →Expected monthly revenue: $40 × 1,500 × 0.85 = $51,000
• →Opening inventory at cost: $51,000 × (10 ÷ 4) ÷ 0.60 = $212,500 at retail = $127,500 at cost

This is your initial OTB budget for the new store.

Step 4: Plan the cash flow timeline

New stores have a cash flow timing problem: you need to invest in inventory 3–6 months before the store generates revenue.

Typical cash flow timeline

| Timing | Cash out | Cash in | |--------|----------|---------| | Month -6 to -3 | Vendor deposits (30–50% of buy) | None | | Month -2 to -1 | Balance payments, freight, store build-out | None | | Month 1 (opening) | Operating costs, staffing | First sales (typically 70–80% of steady-state) | | Month 2–3 | Replenishment orders | Ramping (80–90% of steady-state) | | Month 4–6 | Normalized operations | Steady-state (100%) |

Key insight: Your new store will consume cash for 4–6 months before it reaches break-even cash flow. Plan the total cash requirement, not just the inventory cost.

Step 5: Build the receipt flow plan

Don't ship all inventory to the store on opening day. Stagger receipts:

Pre-opening (2–4 weeks before)

• →Core basics and visual merchandising anchor styles
• →First floor set inventory
• →60% of planned opening inventory

Opening week

• →Remaining 40% of launch inventory
• →Full size run in all key styles

Week 4

• →First replenishment based on sell-through data
• →Test style additions if demand signals are positive

Week 8

• →Full replenishment cycle established
• →Add categories or styles based on actual sell-through
• →Exit underperformers early (markdown at week 6–8, not week 12)

Step 6: Set KPIs and review cadence

New stores need closer monitoring than established stores. Weekly review for the first 3 months:

| KPI | Target | Action if missed | |-----|--------|-----------------| | Sell-through rate | 55–65% at week 8 | Markdown slow styles, reallocate | | Revenue vs. proxy | 80%+ of proxy store | Review assortment — missing categories? | | WOS by category | 6–10 weeks | Reorder winners, pause receipts on slow | | Customer transactions per day | Benchmarked to proxy | Marketing adjustment if below threshold | | Average transaction value | Benchmarked to proxy | Price point alignment check |

What to avoid

Don't "fill the store" with excess from other locations

Tempting but dangerous. Shipping slow-selling inventory from other stores to the new location doesn't solve the excess problem — it moves it. The new store should launch with fresh, high-confidence inventory, not other stores' markdowns.

Don't use the new store as a test lab

"Let's put all the new, unproven styles in the new store to see if they work." No. Your new store should lead with proven performers to establish its revenue baseline. Use established stores (where you have traffic and customer history) for testing.

Don't plan the new store in a separate file

The new store's inventory comes from the same OTB budget. Its allocation competes with existing stores. It needs to be planned within the same system — not in a separate spreadsheet that doesn't reconcile with the master plan.

Further reading

• →Store Clustering for Apparel — finding the right proxy store cluster
• →Localized Assortment Planning — location-specific assortment strategies
• →Allocation and Replenishment Best Practices — allocating to new vs. established stores
• →What Is Open-to-Buy Planning? — setting the OTB budget for a new store
• →Growth Playbook for Emerging Apparel Brands — scaling your business infrastructure