Chinese LFP ESS cell EXW spot has flattened near RMB 0.360–0.367/Wh across InfoLink's August 12 and SMM's August 14 assessments, decelerating from -2.7% WoW in late July to 0% WoW through early August. NMC 5:3:2 prismatic runs roughly ¥0.13–0.15/Wh above. The H1 2026 trajectory has been a decelerating decline: prices sit below year-ago levels, but the rate of compression has slowed as producers at the top of the stack rebuild margins instead of passing through lower lithium carbonate costs. InfoLink's 314 Ah ESS cell assessment sits roughly RMB 6/kWh below SMM's, a persistent level gap on an otherwise identical flat trend, reflecting different assessment methodologies as documented in Issue #9.
That floor is lower than a standard cost waterfall would predict. Standard ¥/Wh decompositions track lithium carbonate, cathode processing, separator, electrolyte, electricity, labor, and depreciation, but not the eight to ten months of working capital that upstream suppliers extend to cell makers through payment terms — a cost curve input that suppresses the price floor and never appears in the number procurement teams benchmark against.
What one supplier disclosed
Shangtai Technology, a cathode material supplier, disclosed in a September 2025 Shenzhen Stock Exchange filing that its settlement cycle with CATL ran approximately 300 days from delivery to cash. Invoicing occurred the month after delivery. CATL's electronic receivables certificate carried a nine-month term. Shangtai's principal practice during the disclosed period was holding to maturity rather than factoring.
That is one supplier's experience with one buyer. But Economic Observer estimated 2025 combined accounts-and-notes-payable cycles of 265 to 283 days for five mid-tier cell producers and 308 days for CATL. Those are calculated financial ratios, not contractual terms, and the report does not publish a common procurement denominator. The order of magnitude is consistent with Shangtai's primary disclosure. Eight to ten months from delivery to cash is how the sector settles.
CATL's payables at scale
CATL's H1 2026 interim report gives the system dimensions.
| H1 2026 | H1 2025 | YoY | |
|---|---|---|---|
| Trade payables | RMB 202.5B | RMB 133.4B | +51.8% |
| Notes payable | RMB 153.0B | RMB 77.0B | +98.8% |
| Combined | RMB 355.5B | RMB 210.4B | +69.0% |
Status: Strengthening. Combined payables grew 69% YoY to RMB 355.5B at H1 2026, outpacing revenue growth in a way consistent with lengthening settlement cycles rather than proportional procurement expansion alone. The filing discloses no contractual average payment term and no DPO on a consistent procurement base, so the split between volume growth and term extension can't be isolated from public data. Timeline for compression: June 15, 2027 is the earliest binding mechanism (PBOC Notice No. 77 transition expiry), and it reaches only one instrument category.
Of the RMB 153.0B in notes payable, RMB 147.8B were bank acceptance bills, where the bank guarantees payment at maturity, and RMB 5.2B were commercial acceptance bills backed by CATL's own credit. Bank acceptance bills discount easily because the bank carries the credit risk, but they still defer cash settlement for the full bill term. The supplier gets liquidity if it factors the bill, at a cost that sits on the supplier's books rather than the cell maker's income statement.
CATL separately disclosed RMB 57.8B in supplier-finance arrangements, of which finance providers had already advanced RMB 50.4B to suppliers. CATL issues an obligation through its supply-chain platform, a bank or finance company pays the supplier at a discount, and CATL settles with the finance provider at maturity. The supplier gets cash earlier without any change to the cell maker's payment timeline. The financing cost sits with whoever accepts the discount, and neither CATL's filing nor Shangtai's discloses the rate.
Roughly $49B of supplier-financed working capital sits inside the system's largest producer, at current exchange rates.
How supplier credit reaches the cell price
A cell maker paying for cathode material, separator, and electrolyte 250 to 300 days after delivery is operating on its suppliers' balance sheets for that period. Collect from your own customers faster than you pay your suppliers and the float funds operations, capex, and R&D without external financing. CATL, holding RMB 372.1B in monetary funds at June 30 (RMB 440.2B including trading financial assets) against RMB 355.5B in payables, runs this cycle from structural strength: a negative cash conversion cycle compounding an existing cost advantage.
For producers at 30–40% utilization with limited bank credit access, the same mechanism does something different. Being able to produce and ship cells before paying for the materials inside them makes the supplier's willingness to extend credit the binding constraint on whether that capacity operates at all. More binding than lithium or electricity, because those are priced into the bill and the working capital is not.
This connects to the capacity-migration pattern described in Issue #7. A producer that has lost qualified status with a major OEM or a serious ESS integrator can still run its lines for the merchant spot market as long as cathode and separator suppliers keep shipping on nine-month terms. Supplier credit finances the migration of capacity downward into channels with lower qualification requirements, the capacity persists, spot supply stays elevated, and a cost-curve analysis that omits supplier credit concludes the floor is set by material costs when it is partly set by the upstream supply chain's willingness to finance production the cell maker's own economics could not sustain.
What could compress the credit subsidy
Three regulatory mechanisms introduced since early 2025 bear on this. The brief for this piece identified the June 29 industry initiative, the State Council payment regulation, and the anti-involution campaign as the relevant channels. Anti-involution rhetoric has been persistent but has produced no battery-specific payment enforcement beyond what the first two contain; PBOC Notice No. 77, which caps the maturity of electronic receivables certificates directly, is the more operationally relevant third mechanism and is treated below.
All three address the terms of individual transactions without touching the bargaining dynamics that produce those terms.
The June 29 industry initiative. The Power and Energy Storage Battery Enterprise Supplier Payment Standardization Initiative, issued by the China Automotive Battery Innovation Alliance and the China Energy Storage Alliance, asks battery makers to keep SME supplier payment terms within 60 calendar days, prefer cash settlement, and "gradually reduce" commercial acceptance bills. MIIT said 11 companies had responded with implementation proposals but did not name them. An anode-material executive told Jiemian that many core suppliers to leading battery companies are not SMEs, which limits the strict 60-day clause's coverage, and that "encouraging" cash settlement and gradual bill reduction carries no compulsory force. The document sets no maximum bill maturity, no numerical reduction target, no compliance deadline, and no monitoring or sanctions mechanism. It is voluntary contract guidance.
State Council Order No. 802. Effective June 1, 2025, this requires government organs and public institutions to pay SMEs within 60 days. For large private enterprises — every major cell maker — payment should "normally" occur within 60 days, but a different period is permitted where it is "reasonable under industry norms and transaction practice." Secondary descriptions presenting this as an unconditional 60-day cap overstate the primary text. The regulation does prohibit compelling SMEs to accept commercial bills and requires large enterprises to disclose overdue SME contract counts in annual reports. Hainan's industry department reported processing 780 complaint leads and helping 289 SMEs recover RMB 159M from 2025 through February 2026, covering the regulation broadly rather than battery companies specifically. The "industry norms" exception is the operative clause here, and whether 250–310 day cycles count as the reasonable benchmark or as the problem being corrected has not been publicly resolved.
PBOC Notice No. 77. A six-agency notice effective June 15, 2025 requires electronic receivables certificates to carry payment terms of no more than six months in principle and no more than one year in all cases. Shangtai's disclosed nine-month CATL certificate fits inside the absolute maximum and exceeds the preferred period. The notice establishes a two-year transition, making June 15, 2027 the point after which full compliance is expected. This is the most concrete date on the calendar, but it reaches one instrument category rather than the full settlement chain of bills, factoring, and trade payables.
A review through August 14 of MIIT's public battery-industry materials, the alliance initiative records, and the national SME-payment platform found no post-June battery-specific order establishing a bill-maturity ceiling, mandatory bill-to-cash conversion, quantitative reduction schedule, or company-level compliance publication. That absence is bounded: it does not exclude private contract changes or unpublished guidance to individual companies. What it establishes is that nothing binding has been put on the record.
Where the forces oppose each other
Two tensions determine whether the credit subsidy compresses or persists.
Regulatory withdrawal pressure vs. upstream overcapacity. A cathode supplier for whom a single cell maker represents a significant share of revenue faces a coordination problem. Demand shorter terms and the cell maker shifts volume to a competitor willing to accept the existing ones. Cathode active material capacity exceeds cell-maker demand — cathode overcapacity mirrors cell overcapacity one tier upstream — so no individual supplier has the leverage to shorten terms unilaterally. Provincial government support reinforces both sides: it sustains marginal cell makers who would otherwise exit, preserving the buyer's bargaining power, and sustains marginal cathode producers who would otherwise consolidate, preventing the upstream concentration that could shift leverage. The withdrawal mechanisms operate against that structure, and as of August 2026 the structure is winning. The voluntary initiative and the "industry norms" exception both accommodate current practice rather than overriding it. Two things would shift the balance: upstream consolidation giving cathode or separator makers enough share to demand shorter terms, or enforcement that treats 250–310 day cycles as unreasonable rather than as the norm they currently are.
Credit subsidy as cost advantage vs. credit subsidy as life support. For CATL, extended payables are a structural advantage, a negative cash conversion cycle backed by RMB 372.1B in monetary funds at June 30. For a Tier-3 producer at 30–40% utilization, the same mechanism is survival infrastructure; without nine-month supplier credit, production cannot be funded from internal cash flow. Compressing payment terms would widen CATL's cost advantage over marginal producers, since CATL can fund shorter cycles from its balance sheet and they cannot, while simultaneously removing the life support keeping marginal capacity in the market. Which effect dominates at the price floor is not obvious. Faster Tier-3 exits would reduce spot supply and support prices; a strengthened CATL would have more room to set the floor wherever it chooses. The public data does not resolve this, and won't until a credit event or a regulatory action tests it.
Durability assessment
Supplier credit as a cost-curve input is durable for the next 6–12 months. The June initiative is voluntary with no enforcement architecture. Order No. 802's large-enterprise exception accommodates current practice. PBOC Notice No. 77's transition runs through June 2027, and even then reaches electronic certificates rather than the full settlement chain.
The withdrawal triggers are structural. The first is a Tier-3 cell maker defaulting on its commercial acceptance bills, forcing upstream suppliers to recognize losses and tighten terms broadly. The second is upstream consolidation giving cathode or separator makers enough market power to demand shorter terms. Neither is imminent. Cathode overcapacity remains severe, and while Tier-3 financial stress is well documented, provincial support and supplier willingness to keep extending credit have so far prevented the kind of disorderly default that resets terms industry-wide.
The ¥/Wh at which marginal Chinese producers quote sits below what a cost curve built from material inputs, electricity, and depreciation would predict, because that curve omits eight to ten months of supplier-financed working capital. When the financing compresses — through regulatory force after June 2027, through a credit event, or through upstream consolidation — the effective cost floor rises with no change in lithium prices or plant utilization.
- September 1 consumption tax: The 2% lithium-ion battery consumption tax takes effect September 1, and whether producers absorb it or pass it through will be the first test of whether the current flat-price regime reflects genuine stabilization or exhausted pricing power.
- CATL's supplier-finance disclosure comparability: CATL's H1 2026 report presents an H1 2025 supplier-finance comparative of RMB 37.2B under a new factoring/reverse-factoring split, while the original 2025 interim report showed RMB 46.0B under the prior classification — a gap the filings do not reconcile, making trend analysis provisional.
- CRU's LFP cathode utilization: CRU reports H1 LFP-cathode production growth near 70% YoY with most producers above 85% utilization, which if sustained would be the first sign that upstream overcapacity may be tightening enough to shift supplier bargaining power on payment terms.
- PBOC Notice No. 77 transition: The six-agency electronic receivables certificate rule expects full compliance by June 15, 2027, and whether battery companies begin shortening certificate maturities ahead of that date — or wait for enforcement — will signal how seriously the industry treats the preferred six-month cap.