Average Selling Price (ASP)

Average Selling Price (ASP) is gross sales revenue divided by units sold over a defined window. It is not the list price, not the strike-through price, and not the price card you set in Seller Central. It is what the buyer actually paid, averaged across the period — net of coupons, promotions, Subscribe & Save discounts, and tiered quantity discounts.

ASP = Gross Sales Revenue / Units Sold

A SKU listed at €29.99 with a 10% coupon redeemed by 40% of buyers and a 5% S&S discount on 25% of orders has an ASP closer to €27.80. The advertising math that uses €29.99 will systematically over-bid.

Why ASP drives every bid

The canonical Amazon PPC bid formula is:

Max CPC = ASP × CVR × Target ACOS

Every term in that equation matters, but ASP is the only one the advertiser fully controls in the short term. A 10% lift in ASP at constant CVR and Target ACOS raises the math-correct bid by 10%, which usually wins more impressions, which usually means more sales. The compounding goes the other way too — a "promotional" 15% price drop quietly slashes the math-correct bid and the campaign loses placement, often at the worst possible moment (Prime Day, BFCM).

ASP vs. List Price vs. Strike-Through

• List price — what's shown in Seller Central's price field. Theoretical.
• Strike-through price — the higher reference price shown crossed out on the PDP, used to display a "discount."
• Buy Box price — what a buyer pays right now if they click "Add to Cart." This is closer to reality but still a snapshot.
• ASP — the average across all actual transactions in a period. The only number that ties into reported revenue.

For bid math, always use trailing 14-day or 28-day ASP — not list price.

Common mistakes

• Using list price in bid math. Over-bids the account; ACOS drifts upward by exactly the coupon redemption rate.
• Not recalculating ASP after a promotion ends. The campaign keeps bidding at the promo-ASP for 14+ days until reporting catches up.
• ASP confusion across variations. A parent ASIN with a €15 child and a €45 child has a blended ASP that is meaningless for either child's bid math. Pull ASP per child SKU.