Amazon has begun inviting select FBA sellers to participate in a per-unit bidding system to gain placement in Sub Same Day delivery — a premium fulfillment tier that reaches customers in as little as two hours across 2,300 metro areas. This represents a significant shift in how Amazon allocates fast-delivery capacity, moving from standard FBA eligibility to an auction-based model.
What This Means for Your Business
- Auction-based placement: Rather than automatic Sub Same Day eligibility, sellers now need to submit competitive per-unit bids to participate
- Geographic reach: Sub Same Day coverage spans 2,300 metro areas, making it a substantial market opportunity for those who can afford the bidding cost
- Rollout phase: Invitations went out via email in August; this is still an early-stage pilot affecting select sellers
- Cost-benefit calculus: Sellers must now evaluate whether the conversion uplift and margin from faster delivery justify the per-unit bid cost
Key Considerations
- This auction model introduces a new variable cost to fast fulfillment that wasn’t previously negotiable
- Competing for Sub Same Day placement adds complexity to your pricing and margin strategy
- Early participants will help establish benchmark bid levels; late movers will face more competitive pressure
How Squatio Helps
When evaluating whether to bid for Sub Same Day placement, you need clear visibility into your product’s current performance and competitive positioning. Squatio Decode (ASIN lookup, listing visibility & Sentiment IQ review analysis) gives you the baseline metrics — conversion rate, review sentiment, and current visibility — to model the potential uplift from faster delivery. Squatio Optimize (PPC intelligence) helps you understand your customer acquisition cost and lifetime value, which directly informs whether a per-unit bid is economically justified for your SKUs.
Have you received an invitation to participate in Sub Same Day bidding, and if so, what’s your initial take on the economics?