Open-to-Buy (OTB)?

What is Open-to-Buy (OTB)?

Open-to-Buy (OTB) is a purchasing planning and inventory management method that helps businesses calculate how much they are able to spend on inventory within a given period. The purpose is to maintain a balance between demand, inventory levels, and financial resources, ensuring that businesses avoid both overstocking and stockouts.

OTB is especially common in retail, wholesale, and e-commerce businesses, where assortments and demand change continuously. The method typically uses budgets, sales forecasts, current inventory levels, and expected incoming stock to determine how much inventory should be purchased in order to maintain a healthy product flow.

How does Open-to-Buy work?

Open-to-Buy works as both a financial and operational planning tool that helps businesses make more accurate purchasing decisions. In practice, it calculates how much “open” purchasing capacity a company has left based on its budget and desired inventory levels.

A traditional OTB calculation usually considers:

• Planned sales
• Current inventory levels
• Existing purchase orders
• Desired ending inventory
• Purchasing budget

The goal is to avoid situations where the company either purchases too much inventory and increases its inventory carrying cost or purchases too little and risks empty shelves and lost sales.

OTB is therefore often used as an active planning tool alongside inventory management and purchasing management, where businesses continuously adjust purchasing decisions based on actual sales performance and demand.

Why is Open-to-Buy important?

Open-to-Buy is important because it creates better control over both finances and inventory operations. When businesses operate without a clear purchasing plan, it can lead to major fluctuations in inventory levels and unnecessary costs.

An effective OTB setup makes it easier to:

• Avoid overbuying and dead stock
• Reduce capital tied up in inventory
• Improve product availability
• Plan seasonal inventory more accurately
• Respond faster to changes in demand

Businesses with large product assortments or seasonal products especially benefit from OTB because it supports more data-driven purchasing and inventory decisions.

The method is also closely connected to concepts such as inventory optimization, inventory turnover rate and reorder point (ROP), as all of these areas focus on balancing inventory levels with customer demand.

Open-to-Buy in practice

Imagine an online store selling clothing and accessories. The business expects strong sales before a new season begins, but at the same time wants to avoid overordering and ending up with excess inventory.

Using Open-to-Buy, the business can:

1. Analyze previous sales data
2. Set a realistic sales budget
3. Calculate desired inventory levels
4. Review already ordered products
5. Determine the remaining purchasing budget

This allows purchasing decisions to become more controlled and continuously adjusted according to actual sales performance.

Many businesses also combine OTB with digital tools such as ERP and WMS systems to gain real-time visibility into inventory levels, order flow, and product movements.

What types of businesses use Open-to-Buy?

Open-to-Buy is especially common among businesses with large product assortments, changing inventories, or seasonal demand patterns. This includes:

• Retail businesses
• Fashion and lifestyle brands
• E-commerce companies
• Wholesale businesses
• Chain stores
• Distribution companies

The more complex the inventory flow, the more value OTB can provide. Businesses with high inventory costs or limited warehouse space often use OTB actively to maintain more flexible operations.

In companies operating across multiple sales and inventory channels, omnichannel strategies and the broader supply chain also play an important role, since purchasing plans often need to be coordinated across several locations and systems.

How does Open-to-Buy relate to Rackbeat?

At its core, Open-to-Buy is about making better decisions based on inventory data, sales performance, and product flow. That is why a digital inventory management system can play an important role in supporting OTB processes.

With Rackbeat, businesses gain access to real-time inventory data, stock movements, and order flows, making it easier to work more strategically with purchasing and inventory planning.

A cloud-based system can help businesses:

• Gain full visibility into current inventory levels
• Support more accurate purchasing decisions
• Improve collaboration between warehouse and purchasing teams
• Reduce the risk of overstocked inventory
• Optimize product flow and inventory rotation

When purchasing and inventory data are closely connected, businesses can work more proactively and respond faster to market changes.

See how Rackbeat can optimize your workflows

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