Total Landed Cost of Imported CNC Parts: The Full Formula

The number on a CNC quote is the beginning of the cost, not the end of it. When you compare a $8.40 ex-works part from an overseas supplier against a $14 part made locally, you are not comparing like with like — the overseas number is missing freight, duty, brokerage, the tooling spread across the run, and the quiet cost of a shipment that arrives two weeks late. Sourcing managers who only look at unit price get ambushed at the second invoice.

This guide gives you the full landed-cost formula, breaks out every component with how it is calculated and a realistic sense of scale, and walks a worked example line by line so you can build the number yourself before you place an order. It is the calculation companion to the geography decision — where you buy — covered in our domestic vs overseas CNC machining comparison. For definitions of landed cost, Incoterms and the customs terms used below, see the manufacturing glossary.

The quick answer: the landed-cost formula

Total landed cost per part is the sum of eleven components. Written out:

Landed cost / part = Ex-works unit price + (Tooling & NRE ÷ run quantity) + (Freight ÷ run quantity) + (Insurance ÷ run quantity) + Import duty + Non-recoverable import VAT/GST + (Brokerage & clearance ÷ run quantity) + (Inland freight ÷ run quantity) + Inventory carrying cost + Payment & FX cost + Quality-escape & delay allowance

The single most useful thing to notice in that line is which terms are divided by quantity and which are not. Everything you pay once per shipment or once per order — tooling, freight, insurance, brokerage, inland trucking — gets cheaper per part as the run grows. Everything charged as a percentage of value — duty and VAT — stays flat per part no matter how many you order. That single distinction is why a part that looks expensive at 50 pieces can be the cheapest option at 2,000, and why you must always price landed cost at your actual quantity, not a round number.

Why unit price alone misleads you

Two suppliers quote the same drawing. Supplier A quotes $8.40 ex-works Guangzhou. Supplier B quotes $12.90 delivered to your dock in Ohio. The buyer who reports A as "$4.50 cheaper" to their boss has compared an ex-works number against a delivered number — two different Incoterms measuring two different scopes of cost.

Ex-works (EXW) means the price covers the part sitting on the supplier's loading floor and nothing else. You own every cost from that point: export handling, freight, insurance, duty, VAT, brokerage and the truck to your building. DAP or DDP quotes bundle more of that in. Comparing quotes without normalising them to the same Incoterm and the same delivered point is the most common and most expensive mistake in cross-border sourcing. The ICC Incoterms rules define exactly where each party's cost and risk begins and ends; read them before you compare a single quote.

Component by component: how each is calculated

1. Ex-works unit price

The machining cost itself — material, machine time, setup, tooling wear, finishing, inspection and the supplier's margin. This is the number on the quote line. At Sendot it already includes CMM inspection and an ISO 9001 process; on other quotes, check whether inspection and material certificates are in the price or billed separately. Ex-works unit price is the only component that does not get divided or added to — it is the base.

2. Tooling and NRE, amortised across the run

Non-recurring engineering — fixtures, soft jaws, custom workholding, first-article setup, programming — is a one-time charge. For pure 3-5 axis CNC machining the NRE is usually modest (often a setup or programming fee, sometimes zero on repeat work). Where NRE dominates is casting and moulding: die-casting tooling is a real mould, which is why die casting carries a 1,000-3,000 piece MOQ while CNC and sheet metal have none. You amortise NRE by dividing it across the pieces the tool will produce: a $6,000 fixture set spread over 100 parts adds $60/part; over 2,000 parts it adds $3. Always amortise over the quantity you will actually order across the tool's life, not a single PO, or you will overstate the per-part cost of a repeat part.

3. Freight — the biggest lever after unit price

Freight is charged per shipment, so its per-part contribution collapses as quantity rises, and the mode you pick changes the number dramatically. Three modes:

• Express courier (DHL/FedEx/UPS): door-to-door in 3-5 days, priced on chargeable weight (the greater of actual and volumetric weight). Best for prototypes and small urgent batches. Per-part freight is high at low quantity but you pay for speed.
• Air freight: airport-to-airport, roughly 5-8 days plus handling, cheaper per kg than express above ~100 kg. A middle path for medium batches that cannot wait for the sea.
• Ocean freight: 25-40 days port-to-port, priced per container or as LCL (less-than-container-load) per cubic metre. The cheapest per part by far at volume, but slow, and the transit time feeds straight into your carrying cost and buffer stock.

The practical rule: for a few prototypes, express wins because there is no per-part freight worth amortising and speed matters. For hundreds or thousands of pieces, ocean's low per-part number usually wins — unless the part is small and dense, in which case air can be close. Get a chargeable-weight estimate from the supplier early; a bulky part can cost more to ship than to machine. The Freightos rate index is a useful public reference for current lane pricing.

4. Insurance

Cargo insurance is typically a small percentage of the insured value (commonly quoted around a fraction of a percent, confirmed by your forwarder). On a high-value machined shipment it is cheap relative to the risk of a lost or damaged container. Divide the premium across the run like any per-shipment cost. Skipping it to save a few dollars per order is a false economy on parts that took weeks to make.

5. Import duty — method only

Duty is a percentage of the customs value of the goods, set by your importing country against the product's classification code. We do not and cannot quote you a rate — rates change, they depend on the exact part and its country of origin, and getting the classification wrong is your legal exposure, not ours. Here is the correct method:

1. Classify the part. Find the HS/HTS code for your product. In the US, use the USITC Harmonized Tariff Schedule. In the EU, use TARIC. In the UK, the UK Trade Tariff. Machined parts often classify by their function or the assembly they belong to, not by "metal part," so this step needs care.
2. Look up the rate for that code and country of origin in the official tool above.
3. Confirm with a licensed customs broker before you rely on it. Duty and any additional tariffs on top of the base rate change with policy and must be verified for your shipment.

Because duty is a percentage of value, it does not amortise with quantity — the per-part duty is the same whether you order 50 or 5,000. Model it as a percentage line, not a fixed cost.

6. Import VAT / GST

Most markets charge VAT or GST on imports (the US does not have a federal VAT; many US states apply use tax — a separate question for your accountant). VAT/GST is charged on the customs value plus duty plus freight, at your country's standard rate, looked up on the same official tariff or tax-authority site. The critical distinction for your landed-cost model is recoverable versus non-recoverable: a VAT-registered business can usually reclaim import VAT as input tax, so it is a cash-flow item, not a true cost; if you cannot reclaim it, it is a real cost and belongs in the formula. We give the method, not the rate, and this is a question for your tax adviser — we do not give tax advice. Find your rate and rules on your national customs or tax-authority site, for example UK VAT rates.

7. Customs brokerage and clearance fees

Your customs broker charges an entry/clearance fee per shipment, plus possible bond, exam or handling charges. This is a per-shipment fixed cost, so it amortises with quantity like freight. On a small prototype shipment brokerage can be a meaningful slice of the landed cost; on a full container it disappears into fractions of a cent per part.

8. Inland freight

The truck from the arrival port or airport to your building. Per-shipment, amortises with quantity. Easy to forget on an EXW or FOB quote because it sits at the very end of the journey, but it is real money, especially if your facility is far from the port.

9. Inventory carrying cost

Ocean freight is cheap but slow, and slow means you hold more stock to cover the 30-40 day pipeline plus a safety buffer. Carrying cost — capital tied up, warehousing, obsolescence, insurance on stock — is commonly estimated at 15-25% of inventory value per year. A part that ships by sea and sits in a buffer for two months carries a cost that a locally-sourced, fast-replenished part does not. This is the hidden tax on long lead times and it belongs in any honest comparison.

10. Payment and FX cost

Cross-border payment carries wire fees and an FX spread, and if you pay a deposit weeks before delivery, the exchange rate can move against you between order and receipt. On large orders the spread alone is worth negotiating. Model it as a small percentage of the invoice value.

11. Quality-escape and delay allowance

The component buyers most often leave out and most often regret. If a batch arrives out of tolerance, the cost is not just the rework — it is the expedited reship, the line stoppage, the engineering hours spent sorting good from bad, and sometimes a missed launch. You cannot predict it per order, but you can carry an allowance based on the supplier's proven capability. A supplier with FAI reports, material certificates, CMM inspection and a real ISO 9001 process earns a smaller allowance because escapes are rarer. This is where a cheap unit price from an unvetted shop quietly becomes the most expensive option you ever bought.

Worked example: building the number line by line

Take a mid-complexity aluminium 6061 machined housing, quoted at $8.40 ex-works. We build the landed cost per part at three quantities and two freight modes so you can see the levers move. Duty and VAT are shown as illustrative percentage placeholders — you must look up your own rate by the method above; these are not real rates and must not be used for a real entry.

Read the bottom row carefully. The same $8.40 part lands at $15.60 at 50 pieces by express — nearly double the quote — because tooling, freight and especially brokerage have almost nothing to amortise over. At 2,000 pieces by ocean it lands at $9.48, close to the ex-works price, because those per-shipment costs have thinned to cents. Now add your looked-up duty and non-recoverable VAT on top of every column: those add the same per-part amount regardless of quantity, because they are percentages of value. That is the whole lesson — quantity rescues the fixed costs, but it never rescues duty and VAT.

The practical takeaway: a low ex-works price at low volume is a trap, and the way out is either more volume, a cheaper freight mode, or consolidating shipments so brokerage and freight amortise. If you are ordering 50 prototypes, judge the supplier on speed and reliability, not on landed cost — the per-part economics only make sense at production volume.

Step by step: calculate your own landed cost

1. Normalise the quote. Confirm the Incoterm (EXW, FOB, DAP, DDP). Everything below assumes you are starting from EXW or FOB and adding the rest yourself.
2. Amortise tooling/NRE. Divide any one-time charge by the total quantity the tool will make across its life, not one PO.
3. Get a chargeable-weight freight quote in each mode you are considering (express, air, ocean) and divide each by your order quantity.
4. Add insurance as your forwarder's premium divided by the run.
5. Classify the part and look up duty in your country's official tariff tool, then confirm with a broker. Enter it as a percentage of customs value — flat per part.
6. Add import VAT/GST only if you cannot reclaim it; if you can, track it as cash flow, not cost.
7. Add brokerage, clearance and inland freight per shipment, divided by quantity.
8. Add carrying cost = inventory value × annual carrying rate × (months held ÷ 12).
9. Add FX/payment as a percentage of invoice value.
10. Add a quality-escape allowance sized to the supplier's proven capability — smaller for a vetted, ISO 9001, FAI-reporting supplier.
11. Sum and compare at your real quantity against a like-for-like delivered domestic number. Only now are you comparing apples to apples.

Common mistakes that inflate landed cost

• Comparing EXW to DDP. The single biggest error. Always normalise to the same Incoterm and delivered point before comparing suppliers.
• Pricing at a round number instead of your real quantity. Fixed costs amortise, so 100 vs 2,000 changes the per-part answer completely.
• Forgetting brokerage on small shipments. On a 50-piece prototype run, clearance fees can be the largest single line after the part itself.
• Ignoring carrying cost on ocean freight. The cheap sea rate hides a real cost in the 30-40 day pipeline and the buffer stock it forces.
• Guessing the duty rate. Wrong HS classification is a legal and financial risk. Look it up officially and confirm with a broker — never copy a rate off a forum.
• Zeroing the quality allowance. One out-of-tolerance batch and a missed launch dwarfs every dollar you saved on unit price.
• Choosing express for a production run or ocean for an urgent prototype. Match the freight mode to the quantity and the deadline.

How Sendot keeps landed cost predictable

We cannot change your country's duty rate, but we control the parts of the formula that cause nasty surprises. No MOQ on CNC machining means you order the exact quantity your landed-cost model calls for, not a minimum that forces you to over-buy. A quote within 12 hours of your CAD, with tooling/NRE stated up front, means you can amortise honestly instead of discovering setup charges at the invoice. CMM inspection, FAI reports and material certificates under an ISO 9001 process shrink the quality-escape allowance — the line item that turns a cheap part expensive. And because we quote clearly against your chosen Incoterm, you can normalise our number against any domestic quote without guessing what is bundled in. For where the geography decision itself should land, read our domestic vs overseas machining comparison, which is built on exactly this cost model.

Frequently asked questions

Send us your STEP file and the quantity you actually plan to order, and we will return an ex-works or delivered quote within 12 hours — with tooling and inspection stated up front — so you can drop it straight into the formula above and see the real per-part number before you commit.