10 Things To Watch Out for in a Shipping Carrier Contract

Growing in eCommerce is no easy feat. With thousands of businesses fighting for attention, you need a solid foundation just to stay competitive. Having a great product, warehouse, or service isn’t enough anymore, you also need optimized operations, a great customer experience, and a strong shipping strategy.

Something that many eCommerce companies overlook is their carrier contract. Too often, businesses end up overspending simply because they don’t fully understand how these contracts work.

In this article, we’ll break down the basics every scaling eCommerce company should know, whether you’re a DTC brand, 3PL network, B2B wholesaler, or warehouse or inventory management platform that incorporates shipping.

Below, you’ll find the most common types of carrier contracts and the key factors to consider before signing one.

Common Carrier Contract Types

Shipping is one of the biggest deciding factors in customer conversion, which means it’s a strong revenue lever and something worth taking the time to understand.

Carrier contracts don’t just determine your rates, they define the framework for how you run your fulfillment strategy. Each agreement comes with spend and volume thresholds that dictate discount levels, which can influence everything from carrier selection and service mix to how you allocate shipments across networks. Meeting those commitments often drives key operational and strategic decisions.

Here are the common carrier contract types you’ll likely come across.

Annual contracts

As the name suggests, annual contracts entitle you to the same rate discounts and terms for a year. This arrangement gives you predictable discount percentages throughout the year, making it slightly easier to budget and plan for other expenses tied to running your eCommerce operations.

It’s important to remember that negotiated discounts are almost always based on the carrier’s published rate structure. As those base rates increase, your effective costs will rise as well, especially when your current discounts expire, making proactive cost-management strategies essential to maintain margin stability.

Evergreen contracts

Evergreen contracts include discounts that remain in effect indefinitely unless you or the carrier chooses to terminate or amend the agreement. This structure ensures continuity in your negotiated discounts and terms, typically without major changes.

The advantage of this model is the discount stability and long-term partnership it can foster with the carrier. However, these agreements can also lead to complacency, as it’s easy to overlook incremental cost increases that occur over time. Carriers frequently adjust their published rates, which means the cost to ship the same packages will increase over time, even when your discount structure remains unchanged.

It’s important to periodically audit your shipping costs, comparing identical shipment profiles over time, to identify and manage these hidden cost escalations.

Fixed-term agreements

Fixed-term agreements differ from evergreen pricing structures in that your negotiated discounts apply only for a defined period, most commonly one-, two-, or three-year terms. This structure is attractive to carriers because it gives them predictable revenue over a set horizon and allows them to adjust your pricing to their advantage once the term concludes.

A critical risk with fixed-term discounts is what happens when a discount period ends and no proactive action has been taken. In most cases, the discount simply expires, and the affected pricing component immediately reverts to full published rates. While carrier representatives can extend expired discounts in 30-day increments, doing so is entirely at their discretion, and they are rarely proactive without the shipper prompting them. The typical pattern is that a discount lapses, your shipping costs spike, and only after you raise the issue does the rep extend the expired discount temporarily while new pricing is negotiated, leaving you with at least a week but often more, of significantly higher shipping costs.

Because of this dynamic, it is essential to track the expiration dates of all fixed-term components and initiate negotiations well in advance. Doing so allows you to either renew or extend existing discounts before they lapse and prevents periods of avoidable cost escalation. It is equally important to understand the timing of each discount’s term. Carriers often structure certain discounts, particularly peak or holiday surcharge relief, to expire shortly before the following year’s peak season, leaving you exposed to the full impact of the next holiday season’s surcharges unless you intervene ahead of time.

Volume-based contracts

Volume-based discount agreements add another layer of complexity beyond the standard spend-driven discounts found in most carrier contracts. While it may seem intuitive that higher shipment volumes would yield larger discounts, many of these structures work differently in practice. In fact, it is often the case that the discount tied to a specific surcharge or service decreases once your volume exceeds a defined threshold.

For example, a carrier may apply a 50% discount on a surcharge if you recorded between 0 and 125 occurrences in the prior week, reduce that discount to 25% if the prior-week volume fell between 126 and 200 occurrences, and eliminate the discount entirely if more than 200 occurrences were recorded. Under this structure, exceeding certain volume levels leads to diminished discounts, not improved ones, making cost forecasting significantly more difficult.

Because these discounts are recalculated based on short look-back periods (usually the previous week), maintaining the desired discount level becomes challenging and often unpredictable. This variability can make it difficult to estimate shipping costs for any given week, especially for businesses with uneven demand or diverse package characteristics.

For shippers with highly consistent shipping patterns, volume-based discounts may function reasonably well. However, for businesses with fluctuating volume, seasonality, or inconsistent package profiles, these agreements can introduce unnecessary cost volatility and should generally be avoided when possible.

Flexible agreements

Flexible agreements can take several forms. In some cases, they involve discount structures that fluctuate based on market conditions or carrier demand. In other cases, they provide access to discounts at spend and volume levels far below what would normally be required, giving shippers the ability to move volume across multiple carriers without jeopardizing their discount tiers or incurring punitive fees.

Because flexible agreements can either offer enhanced discounts during periods of favorable market conditions or allow shippers to utilize a carrier only when needed, they tend to work well for fast-scaling operations or businesses whose shipping patterns vary significantly over time.

However, the same flexibility that makes these agreements attractive can also introduce pricing uncertainty. Shippers may experience fluctuating rates tied to market conditions, or they may be offered lower baseline discounts as carriers seek to offset the additional risk associated with this level of contractual freedom.

10 Concepts You Should Know Before Signing a Carrier Agreement

Carrier contracts inherently involve trade-offs, and not all carriers, or contract structures, will align with your operational goals. Selecting the wrong agreement can limit your flexibility, impair service performance, expose you to higher-than-necessary shipping expenses, and ultimately weaken the customer experience.

Before committing, make sure you’re aware of these critical factors that should guide your negotiation strategy.

1) Blended-term agreements

These contracts blend fixed-term and evergreen components. For example, you may have service-level discounts that remain in place indefinitely, while accessorial and surcharge discounts expire after a defined period. The challenge with this structure is tracking the various pricing elements as they change over time. You’ll need to closely monitor the details to avoid missing discount expiration dates and inadvertently incurring higher shipping costs.

2) Annual rate increases

A 5.9% annual increase may not seem significant when a carrier announces it ahead of the new year, but it’s common to see identical packages experience much larger increases once the new rates take effect. These announcements typically ignore the rate changes applied to accessorials and surcharges, and if your shipping profile has high surcharge exposure, your effective increase may be far above what is announced.

In addition, carriers are taking more pricing action outside the traditional annual increase, with at least three or four mid-year adjustments now becoming the norm. When mid-year increases compound on top of the annual general rate increase, the cost to ship the same package can outpace the increase that the carrier announces at the end of the year. It’s not unusual to see a shipment cost more at year-end than it did in January, and then increase again at the start of the next year compared to the prior December.

This is why it is critical to understand what your agreement will cost you over time, not just at the moment it is implemented.

3) Minimum spend or volume commitments

Why do shippers enter carrier agreements in the first place? Primarily to secure predictable discounts and pricing that reflects the value of their business. But from the carrier’s perspective, these agreements are designed to guarantee consistent volume and long-term loyalty through spend and volume commitments. Carriers will often push for minimum requirements that capture nearly all of your shipping activity, and if left unchecked, those commitments can effectively prevent you from using competing carriers.

If your agreement includes minimum spend or volume thresholds, make sure they are realistic and aligned with your actual shipping patterns. Falling short can lead to reduced discounts or additional fees. Moreover, aggressive minimum spend thresholds can lock you out of using alternative carriers, even when their pricing or service levels are more favorable, simply because you must meet contractual targets with your primary carrier.

4) Surcharges and accessorial fees

Surcharges are ancillary fees associated with specific shipment characteristics, including fuel, residential delivery, geographic delivery zones, peak-season demand, and additional handling based on weight, dimensions, packaging, or surges in volume—just to name a few, as there are well over 200 individual surcharges that can apply to any given shipment. (In some cases, the same extra volume that can earn you deeper discounts elsewhere in the agreement can also trigger penalties, which illustrates the complexity of surcharge structures.)

Carriers constantly adjust these fees in ways that benefit them, not you. To make matters worse, they’re often ambiguous, inconsistent, and non-transparent, which means shippers end up facing unexpected costs.

Take fuel surcharges, for example. The tables that calculate fuel charges have been modified more than a dozen times (that we’ve counted) in just the past three and a half years.

That’s why you can’t afford to focus on base discounts alone. You need a comprehensive view into what is contributing to your shipping spend to know exactly what you’re being charged for.

5) Service level guarantees

Service Level Agreements (SLAs), also referred to as service guarantees, are a critical component of a carrier agreement. They establish clear, contractual expectations between the shipper and the carrier regarding service performance and remedies when standards are not met.

• On-time delivery commitments (time- or date-definite, where applicable)
• Service eligibility, including which products and lanes are covered
• Service exclusions and exceptions that void the guarantee
• Money-back or credit eligibility, generally limited to transportation charges
• Remedies and limitations of liability in the event of service failures
• Dispute resolution procedures and claim-filing requirements
• Termination rights or conditions tied to sustained performance issues

A clear understanding of your SLAs, and which service metrics matter most to your customers, enables you to select the right carrier partners and service mix. Just as importantly, SLAs function as commercial leverage: when carriers fail to meet their contractual commitments, documented service failures can be used to pursue credits, strengthen negotiations, or secure improved pricing and contractual terms in future agreements.

6) Limited liability for lost or damaged shipments

Picture this: you ship a product worth $1,000, it gets lost or damaged, and the carrier compensates you only $100, after requiring you to navigate a series of administrative hurdles to file the claim. Why does this happen? By default, carriers provide just $100 of coverage for lost or damaged packages, which forces shippers to either pay for package insurance (“declared value”) as a surcharge on each applicable shipment or secure coverage through a third-party insurer.

If your business ships higher-value items and you know package insurance will be necessary, the declared value terms in your contract should be a focal point of negotiation. While third-party insurance is an alternative, it also introduces additional out-of-pocket costs.

Always review carrier contracts through the lens of “what happens when something goes wrong?”

7) Restricted service coverage

With an eCommerce business, you must guarantee a carrier can actually reach your customers before signing an agreement.

Carriers often restrict service to specific rural regions, postal codes, countries, or routes. If you commit to a contract without confirming these coverage gaps, you may inadvertently exclude entire customer segments from reliable delivery, creating avoidable friction in sales, customer loyalty, and brand reputation.

Always ask for a full list of service coverage areas and confirm it matches where your customers are located and where you plan to expand.

8) Data and reporting access

In shipping, data is power. Information like delivery times, costs, and extra fees helps you decide on the best shipping strategy for your business.

Unfortunately, not all carriers provide full access to this data. Some contacts, in fact, limit what you can see. So, it becomes harder to track expenses, spot problems, and negotiate better carrier terms.

Before signing an agreement, confirm you’ll have access to detailed reports or a dashboard. This will give you the insights you need to make informed decisions and keep your eCommerce operations running smoothly.

Tip: If you want deep analytics to calculate your landed parcel costs down to the package, consider using a transportation management system.

9) Termination and exit terms

A common provision in carrier agreements is the termination clause. Carriers typically reserve the right to modify or terminate the agreement at their discretion, while shippers are often required to provide at least 30 days’ notice and may face significant penalties for ending the agreement early. In many cases, these clauses also include restrictions on transitioning volume to competitors, for example, prohibiting you from shifting more than a set percentage (often around 20%) of your shipments without triggering substantial punitive fees.

To protect your flexibility, negotiate shorter notice periods and push back against heavy exit fees. This way, if the carrier isn’t meeting your needs, you’ll have the freedom to switch to a better option without unnecessary delays or extra costs.

Tip: Some carriers also prohibit you from running a request for proposals until your contracts are about to expire. Keep an eye out for this clause as well.

10) Unclear incentives or discounts

When an offer looks too good to be true, it usually is, and carrier contracts are no exception. Some carriers may present attractive discounts, but the fine print often ties them with challenging and unrealistic conditions.

To protect your business, evaluate the contract using your actual shipping history, not aspirational growth forecasts. If you rely on overly optimistic projections, carriers will have no issue holding you accountable to them.

Secure Growth-Ready Shipping Solutions with iDrive Logistics

A carrier contract can fuel your growth or hold you back. A good carrier contract makes for a good carrier relationship, and that can make the difference between operational headaches and shipping becoming a competitive advantage.

If you’re in a position where you’re looking to forge a carrier contract or two, understand the basics, know what to look out for, and choose agreements based on your business needs.

iDrive Logistics has partnered with 3PLs, enterprise brands, B2B wholesalers, and other shippers to help them get the most out of their carrier agreements. With our expertise and experience, we can help negotiate better terms and rates that fit your business strategy today (and even as you scale).

Want to take a closer look at your carrier contract? Connect with our team today and let’s explore smarter, more strategic options for your business.

About the Author

Michael Gooding is a Senior Consultant in iDrive Logistics’ Shipping Advisory group, where he applies nearly a decade of expertise in transportation management and logistics strategy. His background in logistics data analysis gives him the tools to deeply understand cost drivers and efficiency gaps. From carrier negotiations to operational streamlining, Michael helps companies improve both their bottom line and their delivery performance. He believes in advice that’s both strategic and practical, turning complexity into clarity.