Freight class codes determine your LTL shipping costs, and one misclassification can add substantially to your invoice. As of July 19, 2025, the National Motor Freight Traffic Association (NMFTA) overhauled the entire freight classification system through NMFC Docket 2025-1, shifting from commodity-based to density-based classification with new technology enforcement at pickup.
Q: What are freight class codes and why do they matter more than ever in 2026?
A: Freight class codes are standardized designations (ranging from Class 50 to Class 500) that determine LTL shipping rates based on four factors: density, stowability, handling, and liability. Under the 2025 overhaul, carriers now use vision technology and precision scales to verify your declared weight and dimensions. A shipment quoted as Class 85 based on inaccurate data may be reclassified as Class 125 at pickup, sharply increasing the actual invoice plus reclassification fees.
For more information, see our complete guide: LTL Logistics and Freight.
For more information, see our complete guide: LTL Logistics and Freight.
For more information, see our complete guide: LTL Logistics and Freight.
Understanding these codes isn’t optional anymore—it’s critical for cost control. This guide explains how the new density-based system works, shows you how to calculate freight class correctly using ClassIT+™, and demonstrates how accurate classification saves hundreds per shipment.
What Are Freight Class Codes Under the New 2026 System?
Freight class codes are standardized shipping designations created by the National Motor Freight Traffic Association (NMFTA) to categorize LTL freight based on transportation characteristics. The NMFC system divides all freight into 18 classes—numbered 50, 55, 60, 65, 70, 77.5, 85, 92.5, 100, 110, 125, 150, 175, 200, 250, 300, 400, and 500. Class 50 represents the densest, easiest-to-ship freight with the lowest rates, while Class 500 represents the lightest, most fragile, or hardest-to-handle freight with the highest rates.
As of July 19, 2025, the NMFTA implemented one of the largest reclassifications in decades through NMFC Docket 2025-1. The system transitioned from commodity-based classification (where item type determined class) to density-based classification (where weight-per-cubic-foot is the primary factor). The NMFTA consolidated approximately 2,000 commodity listings and introduced a new 13-subdensity scale, replacing the previous 11-subdensity system.
Most significantly, Classes 50 and 55 are brand new for 2025, created to reward shippers of highly dense freight with lower rates. The old NMFC Item Lookup Tool (getclassification.com) is no longer supported—ClassIT+™ is now the single authoritative source for classification data that all carriers use to verify and reclassify shipments at pickup.
Why Accurate Classification Is Critical in 2026
Carrier technology enforcement has advanced dramatically. Many LTL providers now use vision technology and precision scales to verify declared dimensions and weight at the dock. If your declared measurements don’t match reality, the carrier’s NMFC class calculator automatically reclassifies your shipment, increasing costs immediately and delaying delivery while the carrier processes the change.
The NMFTA estimates up to 3,500 single-class items have been reclassified into 13 density-based subcategories as part of the 2025 changes. This means classification errors that might have been overlooked previously are now caught systematically by carrier technology. Understanding freight services and pricing strategies helps shippers navigate these new requirements and control costs effectively.
Mini Q&A — New Classification Reality:
- Q: How do carriers verify my declared shipment data now?
A: Vision technology scans your shipment dimensions while precision scales verify weight. If your bill of lading data doesn’t match the scan results, automatic reclassification occurs at pickup with fees added to your invoice. - Q: Are the old commodity codes still valid?
A: No. Pre-July 2025 commodity codes are outdated. All carriers enforce Docket 2025-1 classifications, and using old reference materials will result in misclassification and unexpected fees. - Q: What happens if I use outdated classification methods?
A: Reclassification fees, shipment delays, and invoice adjustments. The freight market in 2026 rewards accuracy and punishes guesswork.
How Does the New Density-Based Classification System Work?
Freight density—measured in pounds per cubic foot (lbs/ft³)—is now the primary factor determining your freight class under the post-July 2025 system. Density is calculated by dividing the weight of your shipment (in pounds) by its volume (in cubic feet). The new 13-subdensity scale provides greater precision for high-density freight, with Classes 50 and 55 offering the lowest rates for extremely dense shipments.
Density Formula: Density = Weight (lbs) ÷ Volume (cubic feet)
Volume Calculation: Length × Width × Height ÷ 1,728 cubic inches per cubic foot
Example: A pallet weighing 2,000 pounds with dimensions of 4 ft × 4 ft × 3 ft occupies 48 cubic feet. Density = 2,000 ÷ 48 = 41.67 lbs/ft³, which falls into Class 50 (over 35 lbs/ft³)—the lowest rate tier.
| Freight Class | Density Range (lbs/ft³) | Typical Examples | Cost vs. Class 50 |
|---|---|---|---|
| 50 | Over 35 | Steel, machinery, cast iron | Baseline (lowest rates) |
| 55 | 30–35 | Dense metals, automotive parts | +5–10% higher |
| 60 | 22.5–30 | Books, small appliances | +20–30% higher |
| 70 | 15–22.5 | Dietary supplements, electronics | +50–80% higher |
| 85 | 12–15 | Beauty products, cosmetics | +70–120% higher |
| 100 | 10.5–12 | Car seats, cushioning products | +100–200% higher |
| 125 | 8–10.5 | Clothing, textiles, bedding | +150–200% higher |
| 500 | Less than 1 | Balloons, foam packaging, displays | +400–600% higher |
The relationship is exponential: as density decreases, freight class increases, and shipping costs rise dramatically. Dense, compact freight may qualify for lower rates under the new system, while bulky, lightweight freight faces rate increases under the density-focused rules.
Using ClassIT+™ to Determine Your Freight Class
ClassIT+™ replaced the deprecated NMFC Item Lookup Tool and is now the single authoritative source for freight classification data. All LTL carriers use ClassIT+™ to verify classification at pickup, making it essential for accurate rate quotes.
Step-by-step ClassIT+™ process:
- Visit ClassIT+™ (the NMFTA’s official classification platform) and search for your commodity by name or NMFC code
- Enter your shipment’s calculated density (weight ÷ cubic feet) into the tool
- Review any handling flags or special requirements displayed for your commodity
- Record the NMFC code and freight class on your bill of lading before carrier pickup
- Double-check that your declared weight and dimensions match your actual shipment
Mini Q&A — ClassIT+™ Usage:
- Q: Is ClassIT+™ free to use for shippers?
A: Yes. The NMFTA provides ClassIT+™ free to shippers, carriers, and third-party logistics providers. Access requires simple registration. - Q: What if my commodity doesn’t appear in ClassIT+™?
A: Search for similar items or contact your carrier’s classification department. New or unique commodities are classified based on density and handling characteristics. - Q: How current is the ClassIT+™ database?
A: Updated quarterly when the NMFTA releases new dockets. Always verify classification immediately before booking to ensure current data.
What Are the Four Factors That Determine Freight Class?
While density is now the primary factor under Docket 2025-1, freight classification still considers four transportation characteristics: density, stowability, handling, and liability. Understanding how each factor affects your class helps you pack and prepare shipments to minimize costs.
1. Density: Weight-Per-Cubic-Foot Ratio
Density measures how much weight fits into a given space and is now the dominant classification factor. The new 13-subdensity scale provides greater precision, particularly for high-density freight. Classes 50 and 55 were created specifically to reward shippers of extremely dense freight with lower rates.
Dense freight utilizes trailer capacity efficiently, allowing carriers to maximize revenue per shipment. Light, bulky freight wastes trailer space and receives higher class assignments to compensate for the lost capacity.
2. Stowability: How Your Shipment Fits in the Trailer
Stowability describes how well your freight fits alongside other shipments in a trailer without wasting space. Under Docket 2025-1, special flags and unique identifiers were added to commodities requiring special stowability considerations, enhancing transparency between shippers and carriers.
Items that stack neatly and utilize trailer space efficiently may receive a lower class than their density alone would suggest. Conversely, oddly shaped items, hazardous materials, or rigid structures may receive higher classifications despite favorable density.
| Stowability Profile | Examples | Classification Impact |
|---|---|---|
| Excellent stowability | Boxed apparel, dietary supplements, compact electronics | Class based primarily on density |
| Good stowability | Appliances, machinery, automotive parts | Class reflects density with minimal adjustment |
| Poor stowability | Sporting equipment, irregular shapes, long items | Class higher than density alone would suggest |
| Special stowability | Hazardous materials requiring separation | Significant class increase regardless of density |
3. Handling: Labor and Care Requirements
Handling refers to the labor and care required to load, unload, and transport your shipment safely. Fragile items, hazardous materials, temperature-sensitive goods, or shipments requiring special equipment receive higher freight classes because they demand more carrier attention and increase liability risk.
The 2025 overhaul added specific handling flags to commodities with special requirements, signaling to carriers upfront that your shipment needs careful treatment and potentially reducing mishandling incidents.
4. Liability: Risk of Damage, Theft, or Loss
Liability considerations assess the risk that your shipment might be damaged, stolen, or lost during transit, or that it might damage other freight in the trailer. High-value items, theft-prone goods, or cargo that could damage other shipments receive higher freight classes to compensate carriers for increased risk exposure.
Factors that increase liability-based classification include high monetary value, theft risk (electronics, alcohol, luxury goods), damage risk to other cargo (corrosive materials, wet goods), and regulatory requirements for specialized handling or insurance.
Mini Q&A — Classification Factors:
- Q: If my shipment is dense but fragile, which factor determines the class?
A: Both factors are considered. A heavy, dense item that’s also fragile typically receives a class higher than density alone would predict. ClassIT+™ accounts for all four factors in its classification. - Q: Can I pack differently to improve my freight class?
A: Yes. Removing void space increases density, using standard pallet sizes improves stowability, and proper protective packaging may reduce handling concerns—all potentially lowering your class. - Q: Do hazardous materials automatically get the highest class?
A: Not necessarily. Hazmat items are classified based on their specific hazard type, density, and handling requirements. Some may be Class 85 or 100, while others reach Class 500. Always verify with ClassIT+™.
How Much Do Freight Class Codes Impact Your Shipping Costs?
Freight class is the primary driver of LTL shipping costs, with each class increment potentially increasing your rate by 10–50% depending on the carrier and lane. The cost progression is exponential, not linear—moving from Class 50 to Class 500 can increase shipping costs by 400–600%.
Real-world cost impact becomes clear when reclassification occurs. A shipment quoted as Class 85 costs less, but if reclassified as Class 125 at pickup due to inaccurate declared data, the same shipment costs sharply more plus potential reclassification fees. Understanding common freight surcharge types also helps you anticipate additional charges beyond base classification rates.
| Freight Class | Density Range | Relative Cost to Class 50 | Cost Increase from Previous Class |
|---|---|---|---|
| 50 | Over 35 lbs/ft³ | 100% (baseline) | — |
| 55 | 30–35 lbs/ft³ | 105–110% | +5–10% |
| 60 | 22.5–30 lbs/ft³ | 120–130% | +15–20% |
| 85 | 12–15 lbs/ft³ | 170–220% | +25–35% |
| 125 | 8–10.5 lbs/ft³ | 250–300% | +35–50% |
| 200 | 4–6 lbs/ft³ | 350–450% | +40–60% |
| 500 | Less than 1 lbs/ft³ | 500–700% | +50–75% |
The cost relationship demonstrates why accurate classification matters. Dense, compact freight benefits significantly from the new Classes 50 and 55, while bulky, lightweight freight faces rate increases under the density-focused system. Shippers who understand and optimize for density save hundreds per shipment.
Cost Optimization Strategies Under the New System
The shift to density-based classification creates clear optimization opportunities. Increasing your shipment density through better packing directly lowers your freight class and shipping cost.
Proven density optimization techniques:
- Remove void space: Use appropriately sized packaging and eliminate air gaps to maximize weight-per-cubic-foot
- Consolidate shipments: Combine multiple orders into denser pallets rather than shipping separately
- Optimize pallet configuration: Stack efficiently and use standard pallet sizes (48″ × 40″) for best stowability
- Choose packaging strategically: Use the smallest protective packaging that maintains product safety
- Consider freight-friendly product design: For regular shippers, product dimensions impact long-term shipping costs
What Are the 7 Steps to Avoid Reclassification Fees in 2026?
Reclassification fees are now common because carrier technology catches classification errors that were previously missed. Vision technology and precision scales verify your declared data at pickup, and discrepancies trigger automatic reclassification with fees added to your invoice. Here’s how to classify correctly every time:
Step 1: Measure Your Shipment Precisely
Use a tape measure or digital measuring device to determine exact length, width, and height. Include any packaging, protective materials, or pallet in your measurements. Rounding down dimensions artificially inflates your declared density and triggers reclassification when carrier technology detects the discrepancy.
Step 2: Weigh Your Shipment Accurately
Use a calibrated scale to determine total weight including all packaging and pallet materials. Estimated weights are unreliable and lead to classification errors. If you don’t have an accurate scale, many carrier terminals offer certified weighing services.
Step 3: Calculate Density Using the Correct Formula
Density = Weight (lbs) ÷ Volume (cubic feet)
Volume = Length (inches) × Width (inches) × Height (inches) ÷ 1,728 cubic inches per cubic foot
Use exact measurements—no rounding. Small measurement errors compound when calculating volume and density.
Step 4: Look Up Your Commodity in ClassIT+™
Search ClassIT+™ for your specific commodity by name or NMFC code. Enter your calculated density to determine the correct freight class. Review any special handling flags or stowability considerations that might affect classification.
Step 5: Document Everything on Your Bill of Lading
Write the NMFC code, freight class, exact weight, and dimensions clearly on your bill of lading before carrier pickup. Include any special handling requirements noted in ClassIT+™. This documentation creates a paper trail if reclassification occurs.
Step 6: Verify Classification with Your Carrier
For unusual or high-value commodities, contact your carrier’s classification department before booking. Get written confirmation of your class assignment to avoid surprises. Some carriers have proprietary surcharges that apply regardless of NMFC classification. Working with reputable freight shipping companies ensures proper classification guidance and reliable service.
Step 7: Review Invoices for Reclassification Charges
Check every freight invoice for reclassification fees or class adjustments. If charges appear, request documentation from the carrier showing how they recalculated your weight or dimensions. Use this feedback to improve future shipment accuracy. A thorough freight audit process helps identify overcharges and classification discrepancies before you pay.
Common Classification Mistakes That Trigger Reclassification:
- Underestimating dimensions: Rounding down length, width, or height inflates declared density
- Using pre-2025 classification data: Old commodity codes and density thresholds are no longer valid
- Ignoring handling flags in ClassIT+™: Special requirements affect classification beyond density alone
- Estimating weight: Carrier scales are precise—estimated weights trigger automatic adjustments
- Excluding packaging weight: All materials that ship with your commodity must be included in weight calculations
How Can LTL Rate Comparison Save Money with Accurate Classification?
Once you’ve accurately classified your shipment using ClassIT+™, comparing rates across multiple carriers becomes critical for cost optimization. Many shippers overpay for LTL because they use a single carrier or rely on outdated rate quotes that don’t reflect current pricing. Learning how to ship freight properly involves both accurate classification and strategic carrier selection.
PalletPath (ParcelPath’s LTL and freight division) simplifies this process by offering access to discounted rates from multiple top-tier LTL carriers on one free platform. After you’ve determined your correct freight class and calculated accurate weight and dimensions, you can enter this data into PalletPath’s rate comparison tool and instantly see quotes from multiple carriers.
This approach eliminates guesswork around carrier selection and ensures you’re paying competitive rates based on accurate classification. Since freight class determines base pricing and each carrier applies different discounts and surcharges, comparing multiple options with identical classification data reveals significant savings opportunities. For shippers seeking predictable costs, exploring flat rate freight shipping options can provide budget certainty regardless of classification complexity.
PalletPath features for accurate freight classification:
- Instant rate quotes from multiple LTL carriers using your verified freight class
- No subscription fees or minimum volume requirements
- Access to negotiated discounts unavailable to individual shippers
- Integrated freight insurance through Shipsurance for high-value shipments
- Bill of lading generation with correct NMFC codes and classification data
- Shipment tracking across all carrier partners
Accurate classification combined with rate comparison can reduce your LTL costs by 20–40% compared to single-carrier retail pricing. The new density-based system rewards shippers who understand the rules and optimize their shipments accordingly. Getting accurate freight shipping quotes from multiple carriers ensures you’re paying fair market rates based on correct classification.
Frequently Asked Questions About Freight Class Codes
What are the 18 freight classes and their density ranges?
The 18 freight classes range from 50 to 500, with Classes 50 and 55 being new additions in 2025. Class 50 (over 35 lbs/ft³) offers the lowest rates for extremely dense freight, while Class 500 (less than 1 lb/ft³) has the highest rates for very light, bulky items. Each class corresponds to specific density ranges, with the new 13-subdensity scale providing greater precision for classification.
How do I determine my freight class using the new 2025 system?
Calculate your shipment’s density (weight ÷ volume), then use ClassIT+™ to look up your commodity and verify the correct freight class. The new density-based system makes weight-per-cubic-foot the primary factor, though stowability, handling, and liability still influence final classification. Always use current tools—pre-2025 methods are outdated.
What happens if I use the wrong freight class?
Carriers now use vision technology and precision scales to verify shipment data at pickup. Wrong classification triggers automatic reclassification, adding substantially to your invoice plus potential delays. A Class 85 shipment reclassified as Class 125 can increase costs sharply and immediately.
When did the major freight classification changes take effect?
NMFC Docket 2025-1 took effect July 19, 2025, implementing the largest freight classification overhaul in decades. The changes shifted from commodity-based to density-based classification and introduced new tools like ClassIT+™. FedEx initially delayed enforcement until December 1, 2025, but now fully enforces the new classifications as of February 2026.
What’s the difference between freight class 50 and 500?
Class 50 represents the densest, easiest-to-ship freight (over 35 lbs/ft³) with the lowest shipping rates, typically steel or machinery. Class 500 represents the lightest, most challenging freight (less than 1 lb/ft³) with rates 400–600% higher than Class 50, such as balloons or foam displays. The relationship is exponential—lower class numbers mean dramatically lower costs.
Is ClassIT+™ free to use for determining freight classification?
Yes, ClassIT+™ is provided free by the NMFTA to all shippers, carriers, and logistics providers. It replaced the old NMFC Item Lookup Tool and is now the single authoritative source for classification data. The tool is updated quarterly and must be used for accurate classification under the new density-based system.
This article is part of our comprehensive LTL Services guide, covering key topics like LTL Freight Class. Explore more in our LTL Logistics and Freight hub. ParcelPath helps you find the best shipping solutions for any need.
Read more: 7 Essential LTL Density Calculator Tips to Save on Freight.
Part of our LTL Class Chart guide. Related: Freight Class Calculator, LTL Density Calculator, How to Determine Freight Class LTL.
