Opening inventory is like packing for a two-week camping trip where you can't run to the store. Pack too little and you'll scramble for supplies. Pack too much and you're carrying dead weight.
What is opening inventory?
Opening inventory covers everything you need stocked before serving your first customer. This means ingredients, cleaning supplies, packaging, and reserves for unexpectedly busy nights.
The basic formula for opening inventory
Opening inventory = (Expected sales first 2 weeks × Ingredient costs per dish) + 30% buffer
💡 Example bistro with 5 main dishes:
Expectation: 50 covers per day, 6 days per week = 600 covers in 2 weeks
- Steak (30% of sales): 180 portions × €8 = €1.440
- Salmon (25%): 150 portions × €6.50 = €975
- Pasta (20%): 120 portions × €3.50 = €420
- Chicken (15%): 90 portions × €4 = €360
- Salad (10%): 60 portions × €2.50 = €150
Subtotal: €3.345 + 30% buffer = €4.349
Calculate ingredients by category
Break your inventory into categories so nothing gets forgotten:
- Meat and fish: Calculate exactly based on your menu mix
- Vegetables: Add 20% extra for garnish and side dishes
- Dry goods: Minimum 3 weeks stock (pasta, rice, oil)
- Dairy: Maximum 1 week (short shelf life)
- Herbs and spices: Full containers/bags (you won't split them anyway)
⚠️ Note:
Calculate using purchase prices excluding VAT. Many suppliers charge 9% VAT on food items.
Buffer for unexpected situations
A 30% buffer might feel excessive, but it saves you from these scenarios:
- Higher guest count than projected (positive review, perfect weather)
- Delivery issues (truck problems, incorrect orders)
- Increased waste (inexperienced kitchen staff)
- Seasonal items with sudden price jumps
From tracking this across dozens of restaurants, those without adequate buffers spend their first month constantly firefighting supply shortages instead of focusing on service quality.
💡 Practical example:
Restaurant with €8.000 expected ingredient costs first 2 weeks:
- Base inventory: €8.000
- 30% buffer: €2.400
- Cleaning & packaging: €500
- Beverages (if you source them yourself): €1.500
Total opening inventory: €12.400
Timing your orders for opening
Schedule your orders strategically to balance freshness with adequate stock:
- 1 week before opening: Dry goods, frozen items, beverages
- 3 days before opening: Meat, fish (if freezable)
- 1 day before opening: Fresh vegetables, dairy, bread
Financing costs
Opening inventory represents a significant upfront expense. Financing options include:
- Supplier credit: Negotiate 30-60 day payment terms
- Staged purchasing: Begin with minimal stock, replenish after week one
- Working capital: Include this in your business plan calculations
⚠️ Note:
Opening inventory isn't an investment but working capital. The money returns through sales, but remains initially 'locked up' in your storage areas.
Track digitally from day 1
Monitor your inventory digitally from opening day. This enables you to:
- Identify which products deplete too rapidly
- Reduce waste
- Refine purchasing patterns
- Adjust food costs if ingredients prove more expensive
A food cost calculator helps you maintain control over inventory and expenses from day one, eliminating Excel complications.
How do you calculate opening inventory? (step by step)
Estimate your sales for the first 2 weeks
Calculate how many covers you expect per day and which dishes they'll likely order. Use percentages: 30% steak, 25% fish, etc. Be realistic - better to be slightly cautious than too optimistic.
Calculate ingredient costs per dish
Add up all ingredients that go into each dish, including garnish and sauces. Multiply by expected number of portions per dish. This gives you base inventory per ingredient.
Add 30% buffer
Add up all ingredient costs and add 30% buffer for unexpected busy periods or delivery problems. Also add cleaning supplies and packaging - you'll easily forget these but they're essential.
✨ Pro tip
Stock only 12-15 key ingredients for your first 3 weeks of operation. This approach can reduce your opening inventory by 40% while you establish reliable supplier relationships and understand actual demand patterns.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
How much money do I need for opening inventory?
For an average restaurant with 40 seats, budget €8.000-€15.000 for opening inventory. This varies based on your menu complexity and projected traffic during the initial weeks.
Can I purchase opening inventory in phases?
Absolutely, but factor in delivery schedules. Buy dry goods a week ahead, fresh products maximum 2-3 days prior. Plan this carefully to avoid last-minute panic.
What if I've ordered too much?
Dry goods and frozen items store well for future use. Fresh products can often be sold to neighboring restaurants or converted into daily specials. Waste beats shortages every time.
How do I prevent spoilage in opening inventory?
Purchase fresh items as close to opening as possible, implement FIFO rotation (first in, first out), and maintain proper refrigeration. Design your initial menus around heavily stocked ingredients.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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