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Reading a Polyester Yarn Quotation: Feedstock Cost, Conversion Margin and Contract Terms
2026-09-16
A Six-Month Fixed Price That Turned Into a Loss
A circular knitting mill in Bursa booked 180 tonnes of 30/1 Spun Polyester in March at a fixed $1.66 per kg CIF, covering a six-month fleece programme for a domestic brand. Two months later the aromatics chain softened and spot yarn fell 9% to $1.51.
The fabric contract was indexed to finished-goods prices, so the mill kept knitting and shipped at $1.44 per kg of yarn equivalent, below its own delivered yarn cost. Four months of that gap consumed $58,400 in gross margin, about two-thirds of the year's profit on the programme. The mistake was the term structure, not the price.
How a Polyester Yarn Price Is Actually Built
A quotation is a stack of four conversions sitting on a commodity index. First, PTA and MEG polymerise into PET chip at roughly 0.855 tonne of PTA plus 0.335 tonne of MEG per tonne of chip, plus $110 to $150 per tonne of polymerisation conversion.
Second, chip becomes staple fibre for $80 to $120 per tonne. Third, staple is carded, drawn, spun and wound: on 30/1 that is $0.38 to $0.55 per kg. Fourth, package dyeing adds $0.30 to $0.60 per kg by shade depth.
Ask any spinner to split those four steps on a commodity item such as 32s/2 raw white polyester yarn. A mill that cannot is quoting a number rather than a cost structure, and you cannot manage what the quote will not show.
Where the Money Sits in a Typical Price
On grey 30/1 at $1.55 per kg ex-works, feedstock is normally 58% to 65% of the price. Spinning, drawing and winding conversion takes 18% to 24%, and that fee is sticky because spindle-hours and labour set it.
Energy, chiefly frame power and compressed air, runs 6% to 9%. Direct labour is 5% to 7%, cones and cartons 1.5% to 2.5%, and net margin before tax only 3% to 6% in a normal year.
That split tells you where leverage lies. A 10% PTA move shifts yarn about 6%, while every efficiency project a spinner delivers is worth a point or two. Track the feedstock index weekly, not the yarn quote.
Why the Same Count Is Quoted Differently
An integrated producer makes chip, staple and yarn inside one group; a converter buys fibre and sells yarn. The integrated mill quotes a conversion margin over its own feedstock, the converter quotes replacement fibre plus a fee.
In a rising market the converter re-prices daily and looks expensive. In a falling market the integrated producer is carrying high-cost inventory and looks expensive. Neither is cheating — they are measuring different feedstock vintages.
The test is to demand two lines: fibre cost basis and conversion fee. Even a dope-dyed item such as 21s/1 black polyester yarn for daily wear should show that split, because pigment is constant while chip moves weekly.
Pricing Mechanism, Validity and Re-Quote Triggers
Three structures dominate. Fixed price for a stated volume transfers feedstock risk to the seller, who charges for it: expect 3% to 5% above spot for six months. Index-linked pricing sets yarn at a published chip index plus a fixed fee.
A collar is usually the better answer: index-linked inside a band of plus or minus 6%, fixed outside it. Write down the index name, publisher, quotation date and settlement currency; "market price at shipment" is not a clause.
Validity should be 7 to 14 days, with named void triggers: feedstock beyond 3%, currency beyond 1.5%, freight beyond 10%, volume beyond 10%. Require re-quotes documented against a trigger.
Incoterms and Payment Terms Are Priced, Never Free
Incoterms move cost between parties without removing it. FOB leaves freight and destination charges with the buyer; CIF bundles freight and minimum cover into the price; DDP adds duty and clearance, typically 4% to 9% over CIF.
DDP hides the duty rate inside one number and is almost impossible to benchmark. Rebuild every quote at a single term first; a 4-cent gap on one count is often nothing but a term difference.
Payment works the same way. Against 30-day terms, 90-day terms add 1.5% to 2.5% and LC at sight adds 0.4% to 0.9% once bank charges are counted. A shade programme such as custom colour polyester yarn for knitters also carries a $150 to $400 per lot lab-dip charge, so fix the minimum dye lot in the clause.
Benchmarking Two Quotes That Are Not Like-for-Like
Normalise first, compare second. Put both offers on the same term, count, month and payment basis, then compare the conversion fee, not the headline price.
- Confirm the weight basis: conditioned weight differs 0.4% to 0.8% from actual weight.
- Check packing: 1.67 kg cones in 24-cone cartons versus 2.08 kg cones shifts freight per kg by up to 3%.
Before signing a six-month programme, insist on six clauses: a written feedstock adjustment formula, a monthly volume tolerance of plus or minus 10%, a named trigger set, a defined delivery window, a 30-day claim window from receipt, and force majeure that excludes price alone.
High-tenacity programmes such as high strength 100% polyester yarn for industrial use should carry packing and weight basis in the same annex, with the adjustment formula restated in the contract rather than referenced in email.
The Bottom Line
A yarn quotation is a feedstock index plus a conversion fee plus commercial terms, and only the middle number is truly negotiable. Read the cost stack, then negotiate the terms, because the terms decide who absorbs the next 9%.
Demand the split into fibre cost and conversion fee, prefer a collar to a naked fixed price, normalise every quote to one incoterm and one payment basis, and write the formula into the contract. That is how a programme stops being a bet.
