For product-based SMEs, inventory is often the largest asset on the balance sheet. Yet, it is also one of the most common causes of business failure.

Many business owners believe that holding more stock is always better—it ensures you never miss a sale. However, in commercial finance, every pallet of unsold stock sitting in your warehouse represents trapped cash. To build a highly profitable business, you must understand the direct relationship between inventory management and working capital.

The Cash Conversion Cycle (CCC) Explained

The Cash Conversion Cycle measures the time (in days) it takes for your business to convert cash invested in inventory back into cash in your bank account through sales and collections.

The cycle consists of three parts:

  1. Days Inventory Outstanding (DIO): How long stock sits in your warehouse before being sold.
  2. Days Sales Outstanding (DSO): How long customers take to pay their invoices.
  3. Days Payable Outstanding (DPO): How long you take to pay your suppliers.

The Formula: CCC = DIO + DSO - DPO

If you hold inventory for 60 days, take 40 days to collect invoices from clients, and have 30 days to pay your supplier, your Cash Conversion Cycle is 70 days. This means you must fund your inventory and operational payroll for 70 days out of your own cash reserves before receiving a single dollar of profit.

The Cost of Carrying Excess Inventory

Holding excess stock is not free. The cost of carrying inventory typically ranges from 15% to 30% of its total value annually, including:

  • Warehousing & Labour: Renting space, handling stock, and utilities.
  • Shrinkage & Obsolescence: Stock that gets damaged, stolen, or becomes unsellable due to market changes.
  • Opportunity Cost: The cash tied up in inventory could otherwise be used to hire staff, invest in marketing, or pay down operational debt.

Practical Steps to optimise Inventory Turns

To free up working capital and improve cash flow, you must implement active inventory controls:

1. Segment Stock (ABC Analysis)

Group your inventory based on value and turnover:

  • A-Items: High value, fast moving (require tight controls and frequent re-ordering).
  • B-Items: Moderate value and movement.
  • C-Items: Low value, slow moving (consider stocking only on-demand or phasing out).

2. Establish Re-Order Points

Don’t order based on gut feel. Use historical lead times and average daily sales to calculate automatic re-order thresholds, preventing excess stock buildup.

3. Connect Operational Systems to Xero

Integrate inventory management software with your Xero general ledger. This ensures inventory valuations and cost of goods sold (COGS) are updated automatically, giving you real-time visibility over gross margins.

By optimising your inventory turns, you reduce carrying costs and shorten your Cash Conversion Cycle, turning trapped stock into active cash flow to support business growth.