LTL (Less Than Truckload) Definition & Complete Shipping Guide

LTL freight pricing is calculated using several interconnected factors: freight class (NMFC code), weight, dimensions, origin and destination, and any accessorial services required. The base rate is expressed as a cost per hundredweight (CWT), meaning cost per 100 pounds, then multiplied by your shipment weight and adjusted for distance. This results in total rates typically ranging from $200 to $2,500 per shipment.

Freight class is the single most important pricing factor. Determined by the National Motor Freight Classification (NMFC), freight class ranges from Class 50 (highest density, lowest cost) to Class 500 (lowest density, highest cost). Your freight’s class is determined by density (weight per cubic foot), stowability, handling difficulty, and liability. A shipment misclassified at Class 100 instead of Class 150 can result in unexpected reclassification fees of $75 to $300.

Dimensional weight is increasingly important in LTL pricing. Carriers calculate both actual weight and dimensional weight (length × width × height ÷ 139) and bill for whichever is higher. This encourages dense, compact packaging and penalizes lightweight but bulky freight that takes up space without contributing much weight. Always calculate both before booking to avoid billing surprises.

Accessorial charges — additional service fees beyond standard dock-to-dock delivery — can add 20 to 50% to your base rate. Common accessorials include liftgate service ($75 to $150), residential delivery ($75 to $200), inside delivery ($75 to $200), limited access locations ($50 to $150), and appointment scheduling ($50 to $100). Understanding which accessorials apply to your shipment before booking prevents costly surprises.

A Bill of Lading (BOL) is the legal document that serves simultaneously as a receipt for freight, a contract of carriage between shipper and carrier, and a title document for the goods being shipped. In LTL shipping, the BOL is the most critical piece of documentation because it governs the entire transaction — from pickup through delivery and into any claims process that might follow.

A complete and accurate BOL must include: shipper and consignee names and addresses, freight description and NMFC code, number of handling units (pallets, skids, boxes), total weight and dimensions, declared value, and any special handling instructions. Errors or omissions on the BOL can lead to misdirected freight, delivery delays, billing disputes, and claim denials.

At pickup, the driver will inspect your freight and sign the BOL, acknowledging receipt. Any damage or discrepancies visible at pickup should be noted on the BOL before the driver signs — this is your legal protection if the carrier causes further damage in transit. Upon delivery, the consignee should inspect the freight before signing the Proof of Delivery (POD), noting any visible damage on the POD form.

The BOL also establishes the claims window. Under the Carmack Amendment to the Interstate Commerce Act, shippers have 9 months from delivery (or the date delivery should have occurred) to file a cargo claim, and carriers must acknowledge the claim within 30 days and resolve it within 120 days. Keeping copies of all BOLs, PODs, and pickup receipts is essential for successful claims processing.

Freight class is a standardized classification system (NMFC — National Motor Freight Classification) used by LTL carriers to categorize freight and determine base shipping rates. Classes range from 50 (cheapest to ship — dense, heavy items like steel or bricks) to 500 (most expensive — very light, bulky items like ping pong balls or inflated balloons). The lower the freight class number, the lower your shipping cost.

Freight class is determined by four characteristics: density (weight per cubic foot — the primary factor for most commodities), stowability (whether freight can be safely stacked or stored with other freight), handling difficulty (whether special equipment or care is required), and liability (value of freight relative to weight, and propensity for damage or theft). The NMFC publishes commodity-specific class assignments for thousands of product categories.

To calculate density and estimate class: measure your freight’s length, width, and height in inches and convert to feet, then calculate cubic feet (L × W × H in feet). Divide the total weight in pounds by cubic feet to get density. A density of 50+ lbs/cu ft typically results in Class 50-55 (cheapest), while 1 lb/cu ft or less results in Class 300-500 (most expensive).

Misclassification is one of the most common and expensive LTL shipping mistakes. If the carrier discovers your freight was incorrectly classified — through reweighing, remeasuring, or comparing against NMFC descriptions — you’ll be charged a reclassification fee ($75-$300) plus the difference in rate between the claimed and actual class. Using an NMFC lookup tool or working with a freight broker can help ensure accurate classification before booking.

LTL shipping typically takes 2 to 7 business days, depending on distance, carrier routes, the number of terminal transfers involved, and the origin and destination locations. Regional LTL shipments within 500 miles often transit in 1 to 3 business days, while cross-country shipments from coast to coast may take 5 to 7 business days or more.

Transit times are longer for LTL than FTL because freight moves through the hub-and-spoke network — your shipment is unloaded, sorted, consolidated with other freight, and reloaded at multiple terminals before reaching its destination. Each terminal transfer adds approximately 4 to 12 hours to the overall transit time. Most LTL carriers provide estimated transit days when you request a quote, allowing you to plan accordingly.

Several factors can affect actual transit time beyond the carrier’s standard estimate: remote delivery locations may require additional transit days, weather and road conditions can cause delays, accessorial services like appointment delivery or inside delivery require additional scheduling time, and high-volume shipping seasons (November-December, spring) may experience network congestion that extends transit times.

If transit time is critical, some carriers offer time-definite or guaranteed delivery LTL services at a premium. These services guarantee delivery by a specific date and time and typically cost 20 to 50% more than standard LTL. For most business-to-business shipments where a 2 to 5 day window is acceptable, standard LTL is the most economical choice.

The single most impactful way to reduce LTL costs is to accurately classify your freight. Misclassification — particularly over-classifying — wastes money on every shipment. Use the NMFC classification system carefully, calculate your freight density precisely, and work with a freight broker or 3PL who can verify classification before booking. Avoiding reclassification fees of $75 to $300 per shipment can save thousands of dollars annually.

Increasing freight density is the second most powerful cost lever. Carriers price based on space utilized and density, so denser freight qualifies for lower freight classes and lower rates. Strategies include using tighter packaging materials, filling void space in boxes, stacking items more efficiently on pallets, and eliminating unnecessary air in packaging. Moving your freight from Class 150 to Class 100 through better packaging can reduce shipping costs by 15 to 25%.

Consolidating multiple smaller shipments into fewer, larger shipments is another effective strategy. LTL pricing has diminishing per-pound rates as shipment weight increases — a single 2,000-pound shipment often costs less than two separate 1,000-pound shipments going to the same destination. Consider holding multiple orders destined for the same customer or region and shipping them together once per week rather than separately.

Finally, choose commercial delivery addresses whenever possible, avoid accessorials that can be eliminated (request dock delivery instead of liftgate if you have loading dock equipment), build carrier relationships and negotiate volume discounts (10 to 30% off published rates is achievable for consistent shippers), and use a transportation management system (TMS) or freight marketplace to compare rates across multiple carriers for every shipment.