Service
Amazon Inventory Management & Demand Forecasting
Overview
Running out of stock kills momentum. Overstocking drains margin. We build demand forecasting models tailored to your sell-through velocity, seasonality, and lead times so you always have the right inventory at the right time. From FBA restock limits and storage-fee optimization to multi-channel allocation, we treat inventory as the operational backbone of every growth plan.
What You Get
- •Demand forecasting based on velocity, seasonality, and trends
- •FBA restock timing and storage-fee optimization
- •Stockout prevention with buffer and lead-time planning
- •Multi-channel inventory allocation across Amazon, Walmart, and DTC
Our Process
Inventory forecasting is not a spreadsheet exercise — it requires understanding your supply chain, Amazon's FBA constraints, and seasonal demand patterns specific to your category.
- •Historical analysis: 12-month sales velocity, seasonality patterns, and trend identification per SKU
- •Lead time mapping: supplier production time, shipping transit, FBA receiving delays
- •Restock modeling: optimal reorder points, safety stock buffers, and FBA restock limit planning
- •Storage fee optimization: balancing in-stock rates against aged inventory penalties
- •Multi-channel allocation: inventory split planning for Amazon FBA, Walmart WFS, and DTC
- •Weekly monitoring: actual vs forecast comparison with automatic reorder triggers
What We Monitor
Inventory health is a daily operational concern, not a monthly check-in. We track the metrics that prevent both stockouts and overstock.
- •Days of supply by SKU: how many days of stock remain at current velocity
- •FBA restock limits: your available capacity vs what Amazon allows you to send
- •Stranded and unfulfillable inventory: units stuck in FBA that need resolution
- •Aged inventory surcharges: SKUs approaching 181-day and 365-day fee thresholds
- •Sell-through rate: velocity changes that indicate demand shifts requiring forecast adjustment
- •Inbound shipment tracking: units in transit, being received, or stuck in receiving delays
Pricing
Inventory management and demand forecasting are included in our full-service management fee ($2,000-$6,000/month). Standalone inventory consulting starts at $1,000/month and includes weekly restock recommendations, storage fee optimization, and seasonal planning.
Results You Can Expect
Good inventory management is invisible — you notice it only when it fails. Our forecasting prevents the failures that kill momentum.
- •Average 72% reduction in stockout events across managed brands
- •Average 40% reduction in aged inventory storage fees
- •Maintained 96%+ in-stock rate across all managed ASINs
- •Saved clients an estimated $2.1M in lost revenue from prevented stockouts in the past 12 months
By the Numbers
72%
Stockout reduction
96%+
In-stock rate maintained
40%
Storage fee savings
$2.1M
Revenue saved from prevented stockouts
Case Studies
Health & Wellness
Supplements Brand: Preventing a $180K Stockout During Peak Season
Situation
A supplements brand running $120K/month on Amazon had a history of running out of their top 3 ASINs during Q4 — last year's stockouts cost an estimated $180K in lost sales and took 6 weeks to recover organic ranking. Their reorder process was manual and based on gut feel, with no lead time buffer for supplier delays.
Approach
We built a SKU-level forecasting model incorporating 18 months of historical data, seasonal demand curves (New Year's resolution spike, summer fitness surge), supplier lead times including buffer for delays, and FBA restock limit constraints. We set up automated reorder triggers and pre-positioned Q4 inventory 8 weeks early.
Results
- •Zero stockouts during Q4 (vs 3 stockouts the previous year)
- •Estimated $180K in revenue preserved that would have been lost to stockouts
- •Organic ranking maintained continuously — no ranking recovery period needed
- •Aged inventory fees reduced 55% by right-sizing shipment quantities
- •Q4 revenue grew 28% year-over-year with consistent product availability
Home & Garden
Home Goods Brand: Multi-Channel Inventory Optimization Saves $67K in Fees
Situation
A home goods brand selling on Amazon, Walmart, and Shopify was managing inventory independently for each channel. Result: overstocked on Amazon (incurring $5,600/month in aged storage fees), understocked on Walmart (missing sales), and frequently out of stock on Shopify during promotions. No unified view of inventory health.
Approach
We built a unified inventory allocation model across all three channels. FBA and WFS received inventory based on channel velocity and fee thresholds. We implemented a shared safety stock pool and dynamic allocation rules that shifted units between channels based on real-time demand signals.
Results
- •Amazon aged inventory fees reduced from $5,600/month to $1,200/month (79% reduction)
- •Walmart in-stock rate improved from 78% to 97% — unlocking $22K/month in previously missed sales
- •Shopify stockout rate dropped from 15% to 2% during promotional periods
- •Total annual storage and fee savings: $67K across all channels
- •Unified forecasting model reduced total inventory investment by 18% while improving availability
Client Feedback
“Last Q4, stockouts cost us $180K and destroyed our organic ranking for months. This year, zero stockouts, and Q4 was our best quarter ever. The forecasting model paid for a full year of management fees in one season.”
“Managing inventory across three channels was chaos until 595 unified everything. We cut $67K in fees and never run out of stock on any platform anymore. It sounds simple, but no one else could actually build the model.”
Frequently Asked Questions
How does Amazon FBA inventory forecasting work?
Amazon FBA inventory forecasting uses your historical sales velocity, seasonal patterns, lead times from suppliers, and Amazon's FBA restock limits to predict when and how much inventory to send. The goal is to maintain sufficient stock to avoid stockouts (which destroy organic ranking) while minimizing long-term storage fees. 595 Agency builds custom forecasting models for each SKU based on your specific sell-through data.
What happens if I run out of stock on Amazon?
Running out of stock on Amazon causes immediate loss of Buy Box ownership, rapid decline in organic search ranking, loss of accumulated advertising momentum, and potential suppression of your listing. Recovering organic rank after a stockout can take weeks or months. This is why inventory forecasting is critical to sustained growth on Amazon.