Why is my Buy Box percentage dropping?
Buy Box share drops for four reasons: a competitor undercut your price by more than 2%, your FBA in-stock rate slipped, seller performance metrics (late shipment, cancellation, defect) crossed a threshold, or Amazon added its own retail offer. Fixing the first three usually restores share within 24 to 72 hours.
The four common causes
Price: any competitor at least 2% below your all-in price (price + shipping) starts winning share. FBA in-stock: if you dip to FBM temporarily, Prime buyers rotate. Seller metrics: late shipment rate above 4%, cancellation above 2.5%, order defect above 1%. Amazon retail: if Amazon sources the product itself, it wins the Buy Box by default.
How to diagnose fast
Check the offers list on the ASIN page and compare all-in prices. Check Account Health for red flags. Confirm FBA units are receiving. If Amazon is selling the ASIN itself, that is usually a permanent share loss on that offer.
Recovery playbook
Reprice within 2% of the lowest FBA competitor. Fix any seller performance metric above threshold. Send inbound units to restore FBA availability. Recovery typically shows up within 24 to 72 hours.
Frequently asked questions
Can I win Buy Box against Amazon Retail?
Rarely on the same ASIN. Focus on the offers where Amazon is not competing.
Does review count affect Buy Box?
Indirectly. Very low ratings can lower conversion enough that Amazon rotates share to a competitor.
How often does Buy Box rotate?
Every 15 minutes to a few hours depending on category and competitors.
Does Nova track Buy Box?
Nova tracks SKU-level revenue and inventory. For hourly Buy Box tracking, most sellers use a repricer alongside.
See this in Nova
Nova surfaces this metric per SKU in near real time so you can act before your next monthly close catches it.
Try Nova free for 14 daysRelated questions
What is a good conversion rate on Amazon?
A good Amazon conversion rate sits between 10% and 15% for a well-optimised listing with 100+ reviews. Categories vary: supplements and pet supplies convert at 15%+, apparel at 5% to 10%, electronics at 8% to 12%. Under 5% almost always signals a listing problem (price, images, or reviews), not a traffic problem.
How do I fix a suppressed Amazon listing?
Suppressed listings do not appear in search. Fix them in Seller Central under Inventory > Manage Inventory > Suppressed. Amazon lists the reason next to each ASIN, usually a missing title character, missing main image, prohibited claim, or category compliance failure. Most fixes push live within 15 minutes.
How do I run an Amazon listing audit?
A full listing audit takes 20 minutes per SKU. Check title length and keyword front-loading, main image quality and gallery count, price versus SERP median, review count and star rating, A+ content presence, and Buy Box share. Score each on a 0 to 3 scale; anything under 2 is a fix priority.
How do I find hidden Amazon fees eating my margin?
The fees that hurt most are rarely hidden, they are just scattered across multiple Seller Central reports. Check monthly storage, aged inventory surcharges, low-inventory-level fees, inbound placement fees, returns processing, subscription-and-save discounts, and coupon redemption fees. Rebuilding a per-SKU P&L from the Fee Preview and Payments reports usually reveals a 3 to 8 point margin gap.
What is a good net profit margin on Amazon FBA?
A healthy Amazon FBA net profit margin sits between 15% and 25% after fees, COGS, PPC, and refunds. Under 10% usually signals hidden fees or overspending on ads. Established brands with private-label pricing power can hold 25% or more, while resellers and wholesalers typically operate closer to 10% to 15%.