Amazon FBA Fees 2026: How to Avoid the Low-Inventory-Level Fee

Last week, one of our clients (a home & kitchen brand with 85K monthly revenue) sent me a screenshot from Seller Central. Red notification: "Low-Inventory-Level Fee Applied - $347.83 for December."

"How is this possible?" he asked. "I sold well, cleared my stock in two weeks. Now Amazon is penalizing me for being successful?"

Welcome to FBA 2026. Starting January 15, 2026, Amazon officially introduced new fee structures that completely change how we manage inventory. The most insidious of them is the Low-Inventory-Level Fee - a penalty for sellers who hold too little stock relative to sales velocity.

For the first time in Amazon Marketplace's 25-year history, the company is penalizing sellers not for having too much inventory, but for having too little.

What Exactly Changed on January 15, 2026?

1. Average FBA Fee Increase: $0.08 Per Unit

Amazon announced that FBA fees will increase by an average of $0.08 per unit sold, or less than 0.5 percent of the average selling price. At first glance, this seems insignificant.

But let's do the math:

• You sell 1000 units monthly
• $0.08 x 1000 = $80 monthly
• $80 x 12 = $960 annually

For a small seller with 20-25 percent margins, this is a direct profit reduction.

2. Low-Inventory-Level Fee: The New Silent Killer

This is the change no one expected. Amazon now charges a fee if your inventory level falls below a certain threshold relative to your sales velocity.

How does the fee work?

Amazon calculates "Historical Days of Supply" for each SKU. If your current inventory coverage drops below 28 days, you enter the penalty zone.

Example:

• You sell an average of 100 units daily of SKU X
• You have 2000 units in FBA warehouse
• Days of Supply = 2000 / 100 = 20 days
• Below the 28-day threshold → Low-Inventory Fee applies

The fee rate varies by product size tier, but for a standard-size item it's approximately $0.15-$0.25 per unit sold while you're in low-inventory status.

3. Inbound Placement Fee Adjustments

Amazon continues to penalize sellers who send shipments to a single destination instead of using Amazon's optimized distribution network.

Before (2025):

• Single Destination: $0.30 per unit
• Minimal Shipment Splits: $0.15 per unit
• Amazon Optimized (4+ locations): $0.00

Now (2026):

• Single Destination: $0.40 per unit (+$0.10)
• Minimal Shipment Splits: $0.22 per unit (+$0.07)
• Amazon Optimized: $0.00 (unchanged)

For a seller who sends 5000 units monthly to a single warehouse, this is an additional $500 monthly or $6,000 annually.

4. Returnless Resolutions Expansion

Amazon expanded the "Returnless Resolution" program for products under $15. When a customer requests a return, Amazon often simply says "Keep it, here's your refund" instead of organizing return shipping.

The problem? You lose both the product and the money.

One of our clients in the beauty niche (average price $12.99) saw the return rate jump from 3.2 percent to 5.7 percent after the Returnless Resolutions expansion in December 2025. Why? Because customers know they can "test" the product without risk.

Real Impact: Case Study from AMZ Genesis Client

Let's look at real numbers from one of our clients - a fitness accessories brand with 450 SKUs.

December 2025 (old fees):

• Total Units Sold: 8,430
• Total FBA Fees: $9,847
• Average Fee Per Unit: $1.17

January 2026 projection (new fees, without optimization):

• Total Units Sold: 8,430 (same volume)
• Base FBA Fee Increase: $0.08 x 8,430 = +$674
• Low-Inventory Fee (15 SKUs affected): +$892
• Inbound Placement Fee increase: +$340
• Total New Fees: $9,847 + $674 + $892 + $340 = $11,753
• Increase: $1,906 monthly or $22,872 annually

For a brand with 18 percent net margin, this means they need to generate an additional $127,000 in sales just to compensate for fee increases.

After AMZ Genesis optimized inventory management and shipping strategy:

Optimized January 2026:

• Base Fee Increase: $674 (unavoidable)
• Low-Inventory Fee: $0 (eliminated through restock strategy)
• Inbound Placement Fee: $120 (reduced through 3PL partnership)
• Total New Fees: $9,847 + $674 + $0 + $120 = $10,641
• Savings: $1,112 monthly or $13,344 annually

6 Strategies to Optimize FBA Costs in 2026

Strategy 1: Maintain 28+ Days of Inventory Coverage

This is the most important. To avoid the Low-Inventory Fee, you must constantly maintain a minimum of 28 days of supply for each SKU.

How to calculate the required quantity:

1. Go to Seller Central → Reports → Business Reports
2. Check "Sales and Traffic" for the last 30 days
3. Find the average daily units sold for each SKU
4. Multiply x 30 (for 30-day buffer)
5. Add 20 percent safety margin for seasonal spikes

Example calculation:

• SKU A: 45 units/day average
• 45 x 30 = 1,350 units
• Safety margin: 1,350 x 1.20 = 1,620 units minimum

AMZ Genesis clients use automated alerts when inventory coverage drops below 35 days, giving enough time to restock before hitting the 28-day threshold.

Strategy 2: Use Amazon's Capacity Manager Proactively

Amazon's Capacity Manager shows how much inventory space you have allocated in FBA warehouses. In 2026, capacity limits are becoming more dynamic and are based on your IPI score (Inventory Performance Index).

Target IPI benchmarks for 2026:

• 450+: Full capacity access, no restrictions
• 350-449: Moderate capacity, may have limits during peak season
• Below 350: Severely restricted, may not be able to send restock

One of our clients had an IPI of 340 in November 2025. Amazon restricted him to 500 cubic feet storage capacity right before Black Friday. He had to cancel orders because he didn't have inventory. Lost sales: approximately $23,000.

After optimizing excess inventory and sell-through rate, the IPI jumped to 465. Now he has unlimited capacity and avoids the Low-Inventory Fee.

Strategy 3: Optimize Inbound Shipments with 3PL Partnership

If you send shipments directly from your warehouse or manufacturer to a single Amazon fulfillment center, you're losing money.

AMZ Genesis recommends partnering with a US-based 3PL (Third Party Logistics provider) that:

1. Receives bulk shipment from your manufacturer
2. Stores inventory short-term
3. Splits into multiple smaller shipments to Amazon's optimized destinations
4. Labels and preps products according to Amazon requirements

Cost comparison:

For 5000 units monthly:

• Single Destination: $2,000
• 3PL Split: $900
• Monthly Savings: $1,100
• Annual Savings: $13,200

Strategy 4: Review Returnless Resolution Eligibility

If you sell products under $15, actively monitor return rates. Amazon automatically enables Returnless Resolutions for low-price items, which can increase return abuse.

Options:

1. Increase Price Above $15: This removes you from the automatic Returnless zone
2. Improve Product Quality: Fewer legitimate returns = less loss
3. Enhance Product Listing: Clear photos, detailed descriptions = correct expectations = lower return rate

One client with a $12.99 kitchen gadget increased the price to $15.99 (bundled with a free recipe booklet). The return rate dropped from 5.7 to 3.1 percent because customers now had to physically return the product instead of keeping it for free.

Strategy 5: Leverage Ships in Product Packaging (SIPP) Program

Amazon's SIPP program allows sellers to send products in retail-ready packaging that Amazon can ship directly without an additional box. This leads to lower fees.

SIPP Benefits:

• Reduced fulfillment fees (approximately $0.05-$0.10 per unit)
• Faster processing time
• Better customer experience (less packaging waste)

Requirements:

• Product must be in durable packaging (will survive shipping without outer box)
• Barcode must be scannable
• Packaging must meet Amazon's prep requirements

To qualify, go to Seller Central → Settings → Shipping Settings → Ships in Product Packaging and enable for eligible ASINs.

Strategy 6: Use Amazon's Fee Preview Tools Daily

Amazon provided three new tools in December 2025 specifically for 2026 fee changes:

1. Revenue Calculator (Updated):
Compare FBA fees vs FBM (Fulfilled by Merchant) fees for each ASIN. You may discover that some low-margin products are actually more profitable as FBM.

2. Fee and Economics Preview Report:
Shows projected fees for each SKU based on historical sales. Download it weekly and filter by highest fee impact.

3. Profit Analytics Dashboard (NEW):
Detailed breakdown of unit economics including fee changes impact. The most useful tool for data-driven decisions.

AMZ Genesis clients review Fee Preview weekly and adjust pricing or inventory strategy accordingly. This prevents surprises and helps with proactive planning.

Frequently Asked Questions

Why did Amazon introduce the Low-Inventory-Level Fee?

Amazon wants to encourage sellers to maintain consistent inventory levels for a predictable customer experience. If a product is frequently out of stock, it negatively affects search ranking and customer satisfaction. The fee is designed to penalize sellers who use a "just-in-time" inventory model without adequate buffer.

Can I completely avoid FBA fee increases in 2026?

The base fee increase of $0.08 per unit is unavoidable for FBA sellers. But you can eliminate or minimize additional fees like Low-Inventory Fee and Inbound Placement Fee through proper planning. Real savings come from optimization, not from avoiding FBA entirely.

Should we switch to FBM (Fulfilled by Merchant)?

It depends on your business model. FBM eliminates FBA fees, but you lose the Prime badge, Buy Box priority, and Amazon's logistics network. For most sellers, FBA is still more profitable even with fee increases because conversion rate with Prime is significantly higher. We recommend a hybrid model: high-margin items on FBA, low-margin items on FBM.

How does Amazon determine "Days of Supply" for Low-Inventory Fee?

Amazon uses a 90-day rolling average of daily sales to calculate expected future demand. If your current inventory, divided by this average, is below 28 days, you enter the penalty zone. The calculation is done daily, so the fee can be applied and removed dynamically.

Is there a grace period for the new fees?

For Low-Inventory Fee - no. Effective immediately from January 15, 2026. For Inbound Placement Fee increases - also immediate. Amazon provided 90 days notice (the announcement was in October 2025), which it considers "sufficient time" for adjustment.

AMZ Genesis: Your Partner for FBA Fee Optimization

At AMZ Genesis, we manage FBA operations for 450+ brands with combined $2.8B in managed sales. Over the last 90 days, we've helped clients save an average of $2,400 annually per account through inventory optimization and strategic shipment planning.

Our services include:

• Inventory Forecasting: AI-powered predictions for optimal restock timing
• 3PL Coordination: Managed shipment splitting for zero Inbound Placement Fees
• Fee Impact Analysis: Monthly reports on fee trends and optimization opportunities
• IPI Optimization: Strategic planning to maintain 450+ IPI score
• Automated Alerts: Real-time notifications when inventory coverage drops below 35 days

Case Study: Home Decor Brand

• Started: December 2025
• Problem: Projected $18,000 in additional fees for 2026
• AMZ Genesis Solution: Inventory rebalancing + 3PL partnership
• Result: Eliminated $14,200 in avoidable fees (78 percent savings)
• Timeline: Full optimization in 45 days

Want to understand the exact impact of 2026 fee changes on your business?

Book a Free FBA Fee Audit (30 minutes):
Our specialists will analyze your last 90 days of sales data and show you exactly how much you can save through optimization. Zero commitment, just real numbers.

Visit: https://amzgenesis.com/contact

Key Takeaways

• Amazon FBA fees are increasing by an average of $0.08 per unit starting January 15, 2026 (unavoidable)
• Low-Inventory-Level Fee is the new penalty for sellers with under 28 days of supply ($0.15-$0.25 per unit)
• Inbound Placement Fees increase significantly for single-destination shipments ($0.40 per unit)
• Maintaining 28+ days inventory coverage is critical for avoiding penalties
• 3PL partnership can save $1,100+ monthly in Inbound Placement Fees
• Returnless Resolutions expansion increases return abuse for products under $15
• Amazon's new Fee Preview tools are essential for data-driven optimization
• Real savings come from proactive planning, not reactive adjustments

Author: AMZ Genesis Team
Last Updated: January 21, 2026
Sources: Amazon Seller Central Official Announcements, CLOSO Amazon Marketplace Analysis