ProcessStrategy & Corporate Finance
Working capital optimization: a program to release cash from receivables, payables and inventory
Working capital optimization releases cash tied up in the operating cycle by collecting from customers sooner, holding less inventory and paying suppliers on agreed terms rather than early. Unlike cost cutting, it changes when cash moves, not how much is spent. This page sets out the program: measure the cash conversion cycle correctly, diagnose order-to-cash, procure-to-pay and inventory, rank levers by cash, effort and relationship risk, and make gains stick through incentives and ownership.
On this page
- The sequence of a working capital program
- Cash conversion cycle measures and the distortions to correct
- Seven steps from diagnosis to sustained cash release
- Ranking working capital levers by cash, effort and relationship risk
- Legal limits on payment terms and supplier finance disclosure
- A mid-size industrial distributor's three-month program
- Questions and answers
- Sources
The sequence of a working capital program
- Measure the baseline
Days sales, inventory and payables outstanding by segment, adjusted for seasonality.
- Diagnose order-to-cash
Terms, billing accuracy, disputes, collections and cash application.
- Diagnose procure-to-pay
Supplier terms, approval cycle and payment-run discipline.
- Diagnose inventory
Segmentation, policy parameters and slow-moving stock.
- Prioritize levers
Rank each lever on cash released, effort and relationship risk.
- Embed and sustain
Owners, targets in incentive plans and a monthly cash review.
Cash conversion cycle measures and the distortions to correct
- Days sales outstanding (DSO)
- Trade receivables divided by revenue for the period, multiplied by the days in the period. Calculate it on average balances and by customer segment; a single period-end figure is easily flattered by a large collection on the last day.
- Days inventory outstanding (DIO)
- Inventory divided by cost of goods sold, multiplied by the days in the period. Split it by stock category, because finished goods, raw materials and spares behave differently.
- Days payable outstanding (DPO)
- Trade payables divided by cost of goods sold or by relevant purchases, multiplied by the days in the period. Exclude accruals and non-trade payables, which inflate it without reflecting supplier terms.
- Cash conversion cycle
- DSO plus DIO minus DPO: the number of days between paying for inputs and collecting cash from customers. Compare it with your own history and with businesses that share your model, not with a generic benchmark.
- Seasonality adjustment
- Comparing the same months year on year, or using rolling averages, so that a seasonal peak in receivables or stock is not mistaken for deterioration.
- Supplier finance
- An arrangement in which a finance provider pays the supplier early and the buyer pays the provider later. Also called reverse factoring; it has specific disclosure requirements, discussed below.
Seven steps from diagnosis to sustained cash release
Build the segmented baseline
Calculate the three measures by business unit, customer segment, supplier category and stock category over at least a year of monthly data. Identify where the balances actually sit before choosing levers.
Trace order-to-cash failures
Sample overdue invoices and follow each back to its cause: non-standard credit terms, pricing or billing errors, missing purchase order numbers, unresolved disputes, slow dunning or unapplied cash. Count causes by value, not by number of invoices.
Review procure-to-pay practice
Compare contracted payment terms with actual payment timing. Look for invoices paid before their due date, terms that differ for similar suppliers, slow approvals that cause late payment, and early-payment discounts taken or ignored without analysis.
Segment inventory and test policy
Classify items by value and demand variability, check safety stock and reorder parameters against actual demand and lead times, and list slow-moving and obsolete stock with a disposal plan.
Rank the levers
Score each candidate lever on cash released, effort and lead time, and risk to customer or supplier relationships. Fund the quick, low-risk fixes first, such as billing accuracy and early-payment discipline.
Align incentives and governance
Add cash measures to the targets of the functions that create working capital: sales for terms and collections, procurement for payment terms, operations for stock. Agree who approves exceptions to standard terms.
Review monthly and keep the gains
Report each measure by segment every month against target, with owners explaining movements. Feed expected collection and payment timing into the thirteen-week cash forecast so the cash shows up where treasury can use it.
Ranking working capital levers by cash, effort and relationship risk
A qualitative guide for ranking. Actual cash released depends entirely on where your balances sit, which the baseline shows.
| Lever | Effort and lead time | Relationship risk | Watch for |
|---|---|---|---|
| Billing accuracy and faster dispute resolution | Moderate; process and data fixes | Low; customers prefer correct invoices | Disputes caused by pricing or contract data upstream |
| Prioritized collections | Low to moderate | Low if handled courteously | Chasing small balances while large ones age |
| Standardized customer credit terms | Moderate; needs sales agreement | Moderate for strategic accounts | Sales granting exceptions to win deals |
| Paying on agreed terms, not early | Low; payment-run settings | Low | Early-payment discounts that are worth taking |
| Harmonized supplier payment terms | High; renegotiation | High for small or critical suppliers | Legal limits and payment-practice reporting |
| Inventory policy and slow-moving stock | Moderate to high | Low externally; service-level risk internally | Stock-outs if safety stock is cut without analysis |
Judgments of typical effort and risk, not measured results. Supplier finance is deliberately left out: it changes who funds the cycle rather than releasing cash from it, and it carries disclosure obligations.
Legal limits on payment terms and supplier finance disclosure
Extending payment terms is the lever most likely to cause harm, and it is constrained. In the EU, the late payment directive generally caps contractual payment periods between businesses at sixty calendar days unless expressly agreed and not grossly unfair to the creditor, and sets shorter defaults for public authorities2. In the UK, large companies and LLPs must publish payment practice reports for each half of their financial year, covering measures such as average time to pay and whether they offer supply chain finance3. A program that stretches suppliers will show up in that public data.
Supplier finance has its own disclosure rules. Under US GAAP, ASU 2022-04 requires buyers to disclose the key terms of supplier finance programs and the confirmed amounts outstanding, with a rollforward of those obligations required from fiscal years beginning after December 15, 20234. Under IFRS, the IASB's amendments to IAS 7 and IFRS 7 issued in May 20235 require disclosure of how these arrangements affect liabilities, cash flows and liquidity risk, for annual periods beginning on or after 1 January 20246.
This is a summary for planning, not legal or accounting advice; confirm the position with counsel and your auditors before changing terms or arrangements. Where AI genuinely helps is earlier in the cycle: classifying dispute reasons from emails and notes, ranking collection calls by value and likelihood of delay, and matching invoices to orders and receipts, as in our AI invoice processing use case. A person still approves credit decisions and supplier communications. Our Treasury Optimization offering covers cash flow forecasting, working capital optimization and treasury operations improvement1.
A mid-size industrial distributor's three-month program
Questions and answers
How is working capital optimization different from cost reduction?
Cost reduction lowers how much a business spends; working capital optimization changes when cash moves. Collecting a receivable sooner or holding less stock releases cash once, which can repay debt or fund investment, but it does not by itself improve profit. The two programs often share data and processes, such as procurement and billing, so it helps to coordinate them, but their targets and measures should stay separate.
Should we take early-payment discounts from suppliers?
Compare the discount with your cost of funding over the days you would pay early. If the annualized return from the discount is higher than what the cash costs you, taking it can make sense even though it shortens payables. Decide this as a policy by supplier or category rather than invoice by invoice, and make sure payment runs apply it consistently.
Can AI improve collections without harming customer relationships?
It can help by deciding whom to contact first and why. Models trained on payment history can rank accounts by value at risk and likelihood of delay, and classify disputes so the right team resolves them faster. The tone and timing of customer contact should remain under human control, and sensitive accounts, such as strategic customers or those in difficulty, should be handled by named account owners.
How long do working capital gains last?
Only as long as the incentives and controls behind them. Gains from one-off actions, such as a collections drive or a stock write-down, tend to fade within a few cycles if sales can grant non-standard terms freely or buyers can pay early. Making cash measures part of function targets, and reviewing them monthly with owners, is what keeps the cycle shorter.
Sources
- Strategy & Corporate Finance: Treasury Optimization offering — ColdAI
- Directive 2011/7/EU of the European Parliament and of the Council of 16 February 2011 on combating late payment in commercial transactions (recast) — EUR-Lex · checked 10 October 2026
- Duty to report: guidance to reporting on payment practices and performance — Department for Business and Trade (GOV.UK) · checked 10 October 2026
- FASB issues ASU requiring enhanced disclosures about supplier finance programs (ASU 2022-04) — Deloitte DART · checked 10 October 2026
- Supplier finance arrangements (amendments to IAS 7 and IFRS 7) — IFRS Foundation · checked 10 October 2026
- IASB amendments to IAS 7 and IFRS 7 for supplier finance arrangements — EY · checked 10 October 2026