Landed Cost for Ecommerce: How to Calculate True COGS with Tariffs & Freight

Most brands calculate COGS wrong. They use supplier invoice price as their "product cost" and call it a day. But that number doesn't include what you actually spend to own the inventory.

A supplement supplier quotes $12/unit. You think: COGS is $12, margin is healthy. But after freight from Vietnam ($2), duties (10% of landed cost = $1.40), and packaging ($0.60), your true COGS is $16. Suddenly that "healthy" margin drops from 60% to 45%.

That's the landed cost problem.

If you don't track it, you're building contribution margin, pricing, and channel profitability on sand. When tariffs shift (they will in 2026), you don't see the impact until you're already unprofitable.

Landed cost is the total cost to get one unit of inventory into your warehouse, ready to sell. It includes:

• Product cost: What the supplier charges per unit
• Inbound freight: Ocean shipping, air shipping, or overland transport to your destination port
• Port fees & handling: Destination port fees, import handling, customs clearance
• Duties & tariffs: Government fees based on origin country and product category
• Packaging & labeling: Box, inserts, tissue, barcodes, labels

It is NOT the supplier invoice. Supplier invoice is only the product cost. Landed cost is what you spend to own it.

Why it matters

• Contribution margin is wrong without it. If you use supplier invoice as COGS, CM1 is inflated by 10-30%.
• Pricing is wrong without it. If you price based on overstated COGS, you think $50 products need $20 ad spend to be profitable, when they actually need $30.
• Channel decisions are wrong. Wholesale margins look better than they are if you ignore landed cost in the math.
• Tariff scenarios blind-side you. When duties jump 5-10 percentage points (as in 2025-2026), you don't see impact on contribution margin unless landed cost is tracked.

Landed cost is the foundation of accurate COGS. Without it, every downstream financial decision is on shaky ground.

The reason for the simplified version: duties are calculated on "landed value" (product + freight), not on product cost alone.

Example calculation

The supplier charged you $12. Your true landed cost is $16.78. That 40% difference is why so many brands discover their margins are lower than expected.

1. Product Cost (Supplier Invoice)

This is what the supplier quotes. It's the starting point, not the full cost.

• Make sure supplier quote is clear: per unit, minimum order, any setup/tooling fees that apply
• Confirm whether quoted price is FOB (Free on Board) supplier facility or CIF (Cost, Insurance, Freight) destination. FOB means you pay freight; CIF means supplier includes it.
• Get cost for different order volumes (100 units vs 500 vs 1000) because freight per unit drops at scale.

2. Inbound Freight (Ocean or Air)

This is a major variable. It changes with volume, route, and season.

Pro tip: Get 3 freight quotes for each shipment. Rates vary 10-20% between forwarders. On a 5,000-unit shipment, shopping rates can save $2,500-$5,000.

3. Port Fees & Handling

Often overlooked. These add up:

• Destination port fee: $150-$300 per shipment (allocated per unit)
• Import customs clearance: $100-$500 per shipment (broker fee)
• Demurrage: Storage fees if shipment sits at port (per day)
• Inland trucking to warehouse: $500-$2,000 depending on distance from port

On a 2,000-unit shipment, these total roughly $0.30-$0.50 per unit. Easy to miss.

4. Duties & Tariffs

This is the most confusing part. Duty rate varies by:

• Product category (HTS code): Same product, different codes = different duties. Vitamins vs supplements, clothing vs home goods.
• Origin country: Vietnam and China have different rates. India, Bangladesh, etc. each have their own.
• Trade agreements: Mexico and Canada get preferential rates under USMCA. Vietnam has some rate reductions.
• Tariffs (political): In 2025-2026, certain categories face 25% tariffs on top of baseline duties. This is temporary and scenario-dependent.

How to find your rate:

• 1. Identify your product's HTS code: go to CBP.gov or USA Trade Online
• 2. Find the code for "origin country" (Vietnam, China, etc.)
• 3. Base duty rate is shown (usually 5-20%)
• 4. Check for additional tariffs in 2026 (25% on certain categories)
• 5. Total rate = Duty + Tariff

5. Packaging & Labeling

Include everything that goes into the box before it ships from your warehouse:

• Outer box/carton ($0.30-$1.00)
• Tissue, inserts, packing peanuts ($0.10-$0.30)
• Barcode labels, UPC labels ($0.05-$0.15)
• Custom inserts or branded materials ($0.20-$1.00)
• Thank you cards, samples ($0.05-$0.20)

Total: $0.70-$2.65 per unit depending on packaging quality. Premium brands (beauty, supplements) often run $1.50-$2.50 per unit.

Example 1: Supplement brand, Vietnam sourcing

Illustrative example:

• Supplier quote: $10/unit (FOB supplier facility)
• Order size: 5,000 units
• Route: Vietnam → Los Angeles

The supplier said $10. Your true COGS is $15.96. Using $10 in your margin calculations overstates CM1 by 60%.

Example 2: Apparel brand, China sourcing

Illustrative example:

• Supplier quote: $8/unit (FOB factory)
• Order size: 10,000 units
• Route: Shanghai → Long Beach

If you retail this at $35, you thought your margin was 77% (based on $8 COGS). Your real margin is 63% (based on $13.05 COGS).

Tariffs are a major variable in 2025-2026. Many consumer brands sourced from China, Vietnam, and Southeast Asia saw 25% tariffs applied starting in early 2025. Understanding the impact on landed cost is critical to pricing and channel decisions.

2026 tariff landscape

• China imports: Base duty 5-25% + 25% tariff on broad categories (apparel, home goods, supplements) = 30-50% total
• Vietnam imports: Base duty 5-15% + selective tariffs = 5-40% depending on category
• India/Bangladesh: Generally lower tariffs, benefiting from GSP (Generalized System of Preferences)
• Mexico/Canada: USMCA preferential rates, typically 0% or low single digits

Scenario: What if tariffs rise 10 percentage points?

A 10-percentage-point tariff increase can cost a brand $100K-$300K per year on a typical import order size. That's a 5-15-point swing in net margin.

How to mitigate tariff risk

• Diversify sourcing: Vietnam instead of China, India instead of Vietnam. Different tariff rates = different COGS.
• Nearshoring: Mexico and Canada get 0% under USMCA. Higher labor costs, but tariff-proof.
• Price with buffer: If tariffs are 25% but could be 35%, price for 35% and keep the difference if rates stay lower.
• Lock in rates quarterly: Once a quarter, set landed cost for next 3 months and price for that cost. Re-set as conditions change.
• Track in real-time: Most brands update COGS manually. Use a system that pulls tariff rates from CBP feeds and updates landed cost automatically.

The brands winning in 2026 aren't the ones with the lowest COGS. They're the ones who know their landed cost exactly, track tariff changes weekly, and price accordingly.

Landed cost is the input to contribution margin. Here's how it flows:

If you use supplier invoice ($10) instead of landed cost ($16.78):

• You calculate CM1 as $40 (80% margin) instead of $33.22 (66%)
• You think the product is much more profitable than it is
• You overfund marketing, set pricing too aggressively, and wonder why margin erodes
• When tariffs shift, you don't see the impact until you're already unprofitable

This is exactly why FP&A teams track landed cost by shipment and reconcile it to contribution margin monthly. When tariff rates change or freight spikes, contribution margin updates instantly, and pricing and channel decisions are right in real-time.

Landed cost is the first number in the profitability equation. Get it wrong, and everything downstream is wrong: contribution margin, pricing, channel economics, tariff impact analysis.

Most brands calculate it once at import time, then never update it. They don't see when freight rates change, when tariffs shift, or when packaging costs increase. They price on historical COGS, and margin leaks silently until the numbers go red.

The brands with reliable margins track landed cost by shipment, update contribution margin monthly, and reconcile pricing to current COGS continuously. When tariff rates post on CBP.gov (which they do weekly), landed cost updates automatically, and the FP&A team sees the impact on channel profitability the same day.