The move. It's the simplest CFO booster there is: don't pay your bills. Push supplier payments from day 45 to day 75 and the cash that would have left this quarter stays in CFO. Mechanically, nothing dishonest has happened, since payables are real liabilities, properly recorded. But the reported "operating cash flow improvement" is a one-time loan from your suppliers wearing an operating label.
How is the payables stretch calculated?
The math (own this cold). You already know DPO = accounts payable / COGS × 365. Purchases is the purist denominator and COGS the common proxy, so say which one you're using.
One-year CFO boost ≈ ΔAccounts payable ≈ (DPO_new − DPO_old) / 365 × COGSThe boost is a level shift. Move DPO from 40 to 55 on ₹3,650 crore of COGS and you release (15/365) × 3,650 = ₹150 crore into that year's CFO, once. To get another ₹150 crore next year, DPO has to go to 70. Meanwhile the stretch has costs the P&L hides: lost early-payment discounts, suppliers who reprice, slipping quality and priority. Then comes the reversal. Any snap-back to old terms drains the same ₹150 crore in one period, usually the worst possible one. When a stressed company's suppliers move it to cash-and-carry, DPO compression turns a liquidity squeeze into a death spiral. You'll see that shape in every India NBFC and retail collapse in the forensic case files.
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How do you spot a payables stretch and its cousins?
Distinguish three things that look alike:
- Structural negative working capital: a dominant retailer or FMCG that always collects before it pays. It's stable and defensible, a moat symptom, with DPO high but flat.
- A disclosed, banked supplier-finance program (see supplier finance): DPO high and rising, with a bank in the middle. Reclassify it to debt.
- A silent stretch: DPO rising with no program and no explanation, often alongside rising payables to MSMEs. In India, Schedule III forces disclosure of dues to micro and small enterprises, and the MSMED Act's 45-day rule accrues penal interest on late MSME payments. The payables ageing table (Schedule III, since FY22) shows you how old the unpaid bills are. A growing >1-year bucket in trade payables is a company paying for its CFO with its supply chain.
Cousins in the same family (unsustainable CFO boosts). Quarter-end heroics come first: a collections blitz and a payment freeze in the last week, which show up as a Q4 CFO spike and a Q1 giveback. Always check quarterly CFO seasonality against peers. Then there's selling inventory to a financier under a repurchase deal, as Delphi did (see receivables factoring). One-time customer prepayments booked into deferred revenue are real cash and a real obligation, sustainable only if the contract engine repeats. And a company can "boost" CFO just by cutting operating spend that borders on capex, such as maintenance and R&D. That's legal and value-destructive, and it shows in the asset-age ratios you built for the earnings games.
Real cases: Home Depot and Tesco
On the record. Schilit documents Home Depot's mid-2000s working-capital program as the canonical legal stretch. DPO extension delivered a large share of its reported CFO growth, and the program was disclosed, deliberate and unrepeatable. Tesco (2014) combined the earnings side, supplier rebates from earnings-management territory, with delayed supplier payments. The UK Serious Fraud Office resolution and the groceries-code adjudicator's findings made the supplier squeeze explicit. The pattern to store: payables games and rebate games travel together, because both exploit the same supplier relationship.