What is GMV?
The total dollar value of all goods sold through a channel over a period, measured before any deductions for returns, discounts, platform fees, shipping, or cost of goods. GMV measures sales volume flowing through a storefront, not profit. A store can post high GMV and still lose money once returns and costs are netted out.
GMV is calculated as units sold multiplied by selling price, summed across a period. It is the headline number TikTok Shop, Amazon, Shopify, and marketplaces report because it shows scale, and it is the metric most creator and affiliate dashboards optimize for. The honest caveat is that GMV is a top-line, not bottom-line, figure: it ignores refunds, chargebacks, promo codes, marketplace commission, payment processing, fulfillment, and COGS, so two stores with identical GMV can have wildly different actual profit. GMV is genuinely useful for tracking momentum, comparing channels, sizing a market, and setting affiliate or creator payout tiers (TikTok Shop ranks creators partly on GMV driven). It is the wrong number for deciding whether ad spend is working; for that you want ROAS, CPA against your max-allowable, and contribution margin. A common mistake is celebrating a GMV spike from a deep discount campaign that drove volume at a loss. Read GMV alongside net revenue and return rate, never on its own.
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