What is COGS and why it matters
COGS (cost of goods sold), also called landed cost, is the true unit cost of getting a product ready to sell. Many sellers mistake the supplier purchase price for the cost and forget the extras stacked on top of it. Every profit and margin decision starts from this number, so getting it wrong throws off everything downstream.
This calculator sums five per-unit line items into a single cost:
- Purchase price — the unit price you pay the supplier or factory.
- Freight share — inbound shipping/logistics spread over the units.
- Packaging — box, filler, label and other packing materials.
- Customs & tax — import duty and any per-unit tax burden.
- Labor / other — assembly, quality control or any remaining unit cost.
The formula is a plain sum: COGS = purchase + freight + packaging + customs + labor. For example, 120 + 8 + 5 + 0 + 3 = 136 TL per unit. The tool also shows a VAT-included line (COGS × (1 + VAT rate)) purely for information, in case you entered the purchase price VAT-excluded. The default rate is the Türkiye standard rate used in the example — set your own in the VAT field. If your invoice already includes VAT, ignore that line.
Use this COGS in your profit calculations
COGS is only the cost side. To turn it into a decision, carry this number into the profit margin calculator as your product cost and see the margin and markup against your sale price. A cost that is understated by a few lira per unit quietly eats your margin across thousands of orders.
Keep in mind that COGS does not include the sales-side deductions — marketplace commission, outbound shipping/desi, service fee, advertising and withholding tax. For your real net profit after all of those, use the Trendyol profit calculator, and to separate the tax inside a price take a look at the VAT calculator.