PPGI Total Landed Cost Factors Beyond FOB Price

To build a landed-cost comparison for PPGI coil imports that goes past the FOB number, convert every commercial and technical variable into a cost per usable tonne: add freight and insurance, adjust for actual versus nominal coil weight, price the tolerance you are buying, estimate damage and claim recovery, then add the cash and storage cost of holding inventory. The FOB price is only the first line. The buyer question — “what will this coil really cost me per square metre of finished panel?” — is answered by a model, not a single quotation. This article sets out how to build that model, which inputs are contract-specific, and where importers most often misjudge the arithmetic. For product context, see the PPGI coil and GI coil pages.

Why FOB Price Is a Weak Comparison Basis

Two suppliers can quote the same FOB unit price and deliver very different economics. The difference hides in four places: how much of the invoiced weight you can actually process, how much metal arrives unsaleable, how much cash is tied up before the coil is consumed, and how much management time is spent resolving discrepancies.

A landed-cost model therefore needs a denominator. “Cost per tonne invoiced” flatters a supplier who ships heavy-tolerance coil. “Cost per tonne of conforming, formable, coated material delivered to the line” is the number a procurement manager can defend. Build your comparison on the second basis, and the FOB price becomes one input rather than the decision.

Freight, Insurance and the Weight You Are Actually Paying For

Ocean and inland freight allocation

Freight is usually quoted per tonne or per container, so it interacts directly with coil weight. Heavier coils within a container reduce freight per tonne but increase handling risk and may exceed crane or forklift limits at the destination. Lighter coils raise freight per tonne and often increase the number of lifts and the risk of edge damage in transit. Neither is automatically better; the correct choice depends on your port handling, warehouse racking and roll-forming line capability.

Allocate freight per tonne of net usable weight, not per tonne invoiced. If a shipment includes coils at the low end of a weight tolerance, the effective freight per usable tonne rises even though the invoice looks unchanged.

Insurance and Incoterms

The Incoterm decides where your cost model starts. Under FOB, you carry main freight, insurance and destination charges; under CIF or CIP the seller arranges them, but the risk transfer point and the insurance scope still need checking. Confirm what the policy covers — in particular whether damage discovered after discharge but before your warehouse is included, and what documentation is required for a claim. These are contract-specific terms, not industry defaults.

Tolerance Buy-Back: The Quiet Cost Line

Steel coil is sold to a nominal thickness and width with a permitted tolerance. If the supplier ships consistently at the thin or narrow end of the permitted range, you receive less metal than the nominal figure suggests. If the tolerance is one-sided in your favour, you receive more. The financial effect is real and measurable, and it is one of the most under-modelled items in PPGI importing.

Three practical consequences follow:

• Thickness tolerance affects both mass and structural performance. A coil at the low permitted limit may still meet the specification, but your yield per tonne of finished panel changes.
• Width tolerance affects slitting and edge trim losses. Narrow coil can push you below the width needed for a specific panel profile.
• Coil weight tolerance affects freight per tonne, handling, and how much scrap remains at the coil eye.

Where standards are cited — for example a dimensional tolerance standard for continuously hot-dip coated steel — confirm the required edition and the exact tolerance values written into your purchase order. General industry guidance says tolerances exist and matter; your contract says which ones apply and how they are measured.

Modelling the tolerance effect

A simple approach: take the nominal thickness and the permitted range, then calculate cost per tonne at the nominal, at the low limit and at the high limit. The spread tells you how much a supplier’s typical position within tolerance is worth. If you cannot obtain measured data, model both extremes and treat the result as a sensitivity, not a forecast.

Damage Rate, Rework and Claim Cost

Damage is not a single number. Separate it into categories, because each has a different recovery path:

• Transit damage — edge deformation, coil telescoping, moisture ingress, wrapping failure.
• Handling damage — dents and scratches from port, truck and warehouse lifts.
• Coating defects — scratches, blistering, poor adhesion, colour or gloss variation.
• Dimensional non-conformity — thickness, width, camber, flatness.

Each category carries a cost stack: the value of the rejected material, the labour to identify and segregate it, the disruption to the line, the cost of replacement material at short notice, and the administrative cost of the claim itself. Even a successful claim rarely recovers the disruption.

Claim cost has two sides. The direct side is inspection, photography, third-party survey if required, and documentation. The indirect side is the working capital locked in disputed material that cannot be used or resold until resolution. Build both into the model, and be explicit that recovery depends on the contract’s inspection window, notice periods and evidence requirements.

Rework as a cost, not a rounding error

Some non-conforming coil can be salvaged — trimming damaged edges, downgrading to a less demanding application, or re-shearing to a smaller width. Rework converts a total loss into a partial loss, but it consumes labour, machine time and yield. If your operation has no rework path, treat non-conforming material as a full loss in the model; if it does, apply a realistic recovery percentage rather than an optimistic one.

Inventory Carrying Effect and Cash Cycle

PPGI coil is a working-capital asset. The carrying effect has four components:

1. Financing cost — interest or opportunity cost on the value of stock, from payment date to consumption date.
2. Storage cost — warehouse space, racking, handling equipment, and the conditions needed to avoid condensation and moisture damage.
3. Obsolescence and specification risk — a coil ordered for one project may not suit the next; colour, coating system and substrate are not interchangeable.
4. Quality drift in storage — poor storage conditions can affect surface condition and, over long periods, coating performance. Actual performance depends on substrate, metallic coating, paint system, environment, forming and maintenance.

Longer lead times and larger minimum order quantities increase all four. A supplier with a slightly higher FOB price but shorter, more reliable replenishment can produce a lower total landed cost per usable tonne because less capital sits idle. This is a genuine trade-off, and it should be quantified rather than assumed.

Practical Comparison Table

The table below is a structure, not a set of values. Populate it with your own quotations, freight rates and internal cost rates. All figures should be dated, because freight, financing and coating costs move.

RFQ Checklist for Landed-Cost Control

Use this list when issuing an enquiry. Each item reduces a source of hidden cost later.

• State nominal thickness, width and coil weight, plus the tolerance basis you require and the standard edition you are referencing.
• Ask the supplier to state the typical position within tolerance, not only the permitted range.
• Specify substrate, metallic coating designation and coating mass, and the paint system by type and nominal thickness.
• Confirm the colour reference system and the acceptable colour/gloss variation.
• Request mill test certificates and, where relevant, coating mass evidence.
• Define packaging: eye orientation, edge protection, moisture barrier, strapping and coil marking.
• Agree inspection timing and location, notice periods for claims, and the evidence required.
• Agree the Incoterm and the exact point of risk transfer.
• Confirm the validity period of the quotation and the date it was issued.
• Ask for the coil weight range that will actually be shipped, and whether single-coil weights can be held within a narrower band.
• Confirm documentation set required for customs clearance at destination.
• Ask how discrepancies are handled commercially — replacement, credit, or price adjustment.

Common Mistakes in Landed-Cost Comparisons

• Comparing FOB prices directly. Different tolerance positions, coating masses and coil weights make headline prices non-comparable.
• Ignoring the denominator. Cost per invoiced tonne hides yield losses; cost per usable tonne exposes them.
• Treating tolerance as a technical detail. It is a financial variable with a measurable effect.
• Assuming claims recover the full loss. They rarely recover disruption, labour or financing cost.
• Using undated prices. Coating, substrate and freight costs move; an old quotation is not a benchmark.
• Forgetting storage conditions. Poor storage can affect surface condition and coating performance, and the resulting loss is not usually claimable.
• Modelling only one scenario. Build best, expected and adverse cases, and identify which supplier performs acceptably in the adverse case.

Frequently Asked Questions

How do I convert an FOB price into a landed cost per usable tonne?

Add freight, insurance and destination charges to the FOB value, adjust for actual versus nominal weight, subtract the value of any rework recovery, add damage and claim administration allowances, add inventory carrying cost, then divide by the tonnes that actually conform and can be processed. The result is comparable across suppliers in a way that FOB price alone is not.

Is tighter thickness tolerance always worth paying for?

Not always. It depends on whether your process is sensitive to thickness variation — for example in structural or load-bearing applications — or whether you are running a tolerant profile where small variation is absorbed. Model the yield effect at both tolerance limits and compare it against the price difference. Confirm the required tolerance basis and standard edition in the purchase order.

How should I treat damage in a supplier comparison?

Use your own receiving inspection data if you have it. If you do not, model a range rather than a single figure, and separate categories, because transit damage, handling damage and coating defects have different claim paths and recovery rates. Remember that claim terms — inspection windows and notice periods — are contract-specific.

Does a longer lead time really increase landed cost?

It can, through financing cost, storage cost and specification obsolescence risk. The size of the effect depends on your cost of capital, warehouse cost and how stable your order book is. Quantify it with your own finance and warehouse rates rather than a general assumption.

Which standards should I reference for PPGI coil?

Standard selection depends on the application, the substrate, the metallic coating and the paint system. Where a standard is named, confirm the required edition and the exact values written into your contract, because editions differ and contractual values override general guidance. Your supplier and, where relevant, your customer or end-user specification should confirm the applicable basis.

How often should I re-run the landed-cost model?

Re-run it whenever a quotation is refreshed, whenever freight or financing conditions change materially, and at least at each annual or project-based sourcing cycle. Because prices are dated and conditions move, request a current dated quotation rather than relying on a previous comparison.

Related Products & Get a Quote

• PPGI Coil (Prepainted Galvanized)
• GI Coil (Hot-Dip Galvanized)
• Galvanized Steel Coil

Need a price? Contact ChinaCNU Steel for a fast RFQ — Send your specifications, quantity and destination port for an order-specific quotation.