A shipment of candles costs $10 a unit on the supplier invoice. Then $240 of freight arrives from the forwarder, $32 of duty from the broker, and a card fee from the bank. Shopify still says the item cost $10, so every margin number in the store is wrong.
Costfold fixes that at the receiving. You pull a purchase order from Stocky's API, upload a five-column CSV, or type the lines in by hand. Then you add the freight, duty, insurance, fees and discounts, each in its own currency, and pick how each one spreads: by line value, by quantity, or by weight. Rounding remainders are handed out by largest remainder, so the allocated shares add up to the invoice total to the cent instead of drifting.
One click writes the landed cost into Shopify's cost per item, either as a direct set or blended into a weighted average against on-hand stock. Every previous value is stored before the write, so a receiving can be rolled back. The margin report then sorts products by how far their margin moved once freight and duty were counted.
There is also a free tool with a deadline attached: Stocky's API shuts down on 2026-08-31, and /stocky-export pulls a store's full purchase-order history out before it does — up to 20,000 POs, no install, no account.
One limit worth knowing: the FX rate is typed in by hand. Costfold does not fetch live rates.