What it means
Every business has cash trapped inside it: in unpaid customer invoices, in stock sitting on shelves, and in the gap between paying suppliers and getting paid. Optimisation is the systematic work of shrinking those gaps so the same trading activity requires less funding.
It matters because released cash is the cheapest money a business will ever find. Cutting ten days from average collection times in a company turning over $18,000,000 a year frees around $500,000 permanently, with no interest to pay and no equity given away.
The three levers are collections, inventory and payables. Faster collections mean clear terms, prompt invoicing, credit checks and consistent chasing; leaner inventory means better demand planning and fewer slow lines; longer payables mean negotiated terms rather than simply paying late, which damages supplier relationships and supply security.
Progress is measured through the cash conversion cycle, which adds the days customers take to pay to the days stock sits in the warehouse, then subtracts the days the business takes to pay suppliers. The lower the number, the less funding the business needs to support the same trading level.
The important nuance is that optimisation has limits and side effects. Squeezing inventory too hard causes stock-outs and lost sales, and stretching suppliers too far invites price rises or priority going to other customers, so the aim is a sustainable position rather than the lowest number achievable.
In practice
Real-world examples.
Example
A commercial cleaning contractor moves from invoicing at month end to invoicing on completion of each job, cutting average collection time by nine days. The change costs nothing and permanently improves the bank position.
Example
An electronics retailer analyses stock turnover by product line and discontinues 140 slow-moving items representing 4% of sales but 19% of inventory value. The clearance releases cash and cuts warehouse costs at the same time.
Example
A food manufacturer negotiates 45-day terms with its two largest packaging suppliers in exchange for committing volumes for a year. Payables days rise from 28 to 41 without any late payments or damaged relationships.
Think of it
“Cash flow optimization is making your cash work harder-better timing and management.
Formula
Calculation
Cash Conversion Cycle = Days Sales Outstanding + Days Inventory Outstanding - Days Payables Outstanding
Cash Released = Days Reduced x Average Daily Operating Cash Requirement
A homeware wholesaler with annual revenue of $18,250,000 currently has Days Sales Outstanding of 52, Days Inventory Outstanding of 40 and Days Payables Outstanding of 30.
Current Cash Conversion Cycle = 52 + 40 - 30 = 62 days
After a twelve-month programme, collections improve to 42 days, inventory to 35 days and supplier terms are negotiated to 40 days.
New Cash Conversion Cycle = 42 + 35 - 40 = 37 days
Days Reduced = 62 - 37 = 25 days
Average daily requirement = $18,250,000 / 365 = $50,000 per day
Cash Released = 25 x $50,000 = $1,250,000
The business frees $1,250,000 of cash from its existing operations without increasing sales or cutting costs.Case study
Seen in the real world.
This illustrative and fictional case follows Brackenhill Supplies, an invented builders' merchant with revenue of $18,250,000 and a chronically full overdraft despite steady profits. The directors assumed they needed a larger facility.
An advisor mapped the cash conversion cycle instead and found it stood at 62 days. Customers on trade accounts were averaging 52 days against 30-day terms because nobody chased until an invoice was 60 days old, three timber lines accounted for nearly a fifth of stock value and turned twice a year, and suppliers were being paid on receipt of invoice out of habit.
The company hired a part-time credit controller, introduced statements on day 25 and calls on day 32, cleared the slow timber lines at a discount, and moved its four main suppliers to 40-day terms. Within a year the cycle was down to 37 days, releasing roughly $1,250,000 and allowing the overdraft to be repaid entirely rather than extended.
Watch out
Common mistakes.
- Treating optimisation as simply paying suppliers late, which saves cash briefly while raising prices and reducing supply priority over time.
- Focusing only on collections while ignoring inventory, which is often the larger pool of trapped cash in a product business.
- Running a one-off cash improvement push and then letting the old habits return, so the cycle drifts back within two quarters.
Questions
People also ask.
How much cash can optimisation typically release?
It depends on the starting point, but businesses that have never focused on the cycle commonly find between 10% and 25% of annual revenue tied up unnecessarily.
Does offering early payment discounts make sense?
Sometimes, but a 2% discount for paying 30 days early is an expensive form of borrowing, so compare it against the cost of your overdraft before offering it.
Is optimisation the same as cost cutting?
No, cost cutting reduces what you spend while optimisation changes when cash moves and how much is tied up, and the two can be pursued independently.
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