TL;DR:
- Delivery SLAs by carrier are contracts that establish measurable commitments and clear responsibilities between companies and logistics providers. They include service scope, responsibilities, communication protocols and economic aspects, while promoting compliance through penalties and bonuses based on KPIs such as OTIF and OTD. To ensure their effectiveness, it is essential to have verifiable digital evidence and incident management protocols that enable accurate audits and improve the end customer experience.
Delivery SLAs by carrier are formal contracts that set measurable performance commitments, responsibilities and consequences for non-compliance between a company and its logistics provider. In the industry, the recognized technical term is Service Level Agreement (SLA). Understanding what delivery SLAs by carrier are is the first step toward managing logistics with data rather than intuition. For businesses and entrepreneurs who depend on shipping goods, these agreements make the difference between a predictable operation and a chain of costly surprises.
What are delivery SLAs by carrier and what do they include?
An SLA in transport is a formal contract that sets measurable performance commitments, responsibilities and consequences for non-compliance. It must describe in detail which services are covered, what "delivered" means and how KPIs will be measured for verifiable monitoring. This precision is not bureaucracy: it is the foundation that makes it possible to audit whether the carrier is actually complying or merely appearing to comply.
A well-constructed delivery SLA covers four fundamental areas:
- Service scope: which operations are included, whether transport, temporary storage, packaging or returns management. Without a defined scope, any dispute is open to interpretation.
- Responsibilities of each party: the carrier commits to timelines and conditions; the sending company commits to delivering correctly labelled and documented goods. Both parties have concrete obligations.
- Communication and incident resolution protocols: how and when delays, damage or losses are reported, and who has authority to make decisions in each scenario.
- Economic structure: penalties for non-compliance, bonuses for superior performance and service credits calculated against monthly KPI thresholds.
Penalty and bonus mechanisms based on monthly KPI thresholds such as OTIF promote alignment of interests and rapid correction. Without clear recovery protocols, penalties become fixed costs without improving the actual service. A good logistics agreement also recommends the use of SMART goals, tracking dashboards and continuous improvement plans for day-to-day operational management.
Professional tip: Before signing any SLA with a carrier, require that the contract includes the exact calculation formula for each KPI. An SLA without a formula is an SLA without teeth.
How are OTIF and OTD measured in transport SLAs?
The two most widely used metrics in logistics service level agreements are OTD (On-Time Delivery) and OTIF (On Time In Full). They answer different questions and, used together, provide a complete picture of carrier performance.
| Metric | What it measures | Main limitation |
|---|---|---|
| OTD | Delivery punctuality within the agreed timeframe | Does not verify whether the order arrived complete |
| OTIF | On-time delivery AND with full quantity | Requires a precise definition of tolerances to be auditable |
The OTD indicator measures deliveries made within the committed timeframe, focusing on punctuality, and requires a single date or window and a clear tolerance. A carrier can have a 95% OTD and still systematically deliver incomplete orders, generating customer complaints that the numbers do not reflect.
The OTIF metric combines on-time and complete delivery, and is the most widely used measure of overall compliance in logistics. A shipment meets OTIF only if it arrives within the timeframe and with the full agreed quantity. Its definition depends on the agreed tolerances: if the contract establishes a 2% quantity tolerance, an order with a 1.5% shortage may count as fulfilled.
Combining OTIF and OTD helps provide a complete view of performance and avoids rewarding punctuality alone while ignoring incomplete deliveries. In practice, an e-commerce company that only measures OTD may be rewarding a carrier that arrives on time but with damaged boxes or partial orders.
Professional tip: Include the monthly calculation of both metrics separately in the SLA. If you only negotiate one, choose OTIF: it is more demanding and more representative of the real end-customer experience.
Why are traceability and evidence key to auditing the SLA?
The difference between meeting an SLA and appearing to meet it lies in the evidence. Without clear time windows, established tolerances, and a precise definition of "complete" backed by digital evidence, OTIF and OTD indicators lack auditability and end up in frequent disputes. This is the point where logistics agreements most often fail in practice.
The types of valid evidence that the SLA must specify include:
- Recipient signature: the most traditional form, but one that requires defining whether a digital signature carries the same weight as a physical one.
- Geolocated photograph: increasingly used by carriers such as GLS, SEUR or MRW to certify that the package arrived at the correct address.
- Delivery documentation (delivery note or POD): the Proof of Delivery is the standard in B2B transport and must be linked to the order number.
- Tracking system record: the status update on the carrier's platform, with a verifiable timestamp.
The documentary closure must include at least the signature, documentation or evidence previously agreed upon for the delivery to be considered fulfilled and auditable. Many companies make the mistake of not properly managing this closure, which generates frequent disputes and blocks continuous improvement. Without valid evidence, the carrier can claim it delivered and the customer can claim they did not receive it, and neither party has documented proof.
Time windows are also part of traceability. An SLA that says "delivery within 24 hours" without specifying whether that includes weekends, public holidays, or whether the window starts from collection or from order confirmation, is not a functional SLA. Defining these parameters precisely in the contract with the carrier in Spain avoids 80% of the most common operational disputes.
How to manage incidents and communication within a delivery SLA?
An SLA limited to delivery metrics is insufficient if it does not establish maximum response times to react to and correct deviations. Logistics SLAs must include incident management commitments, notification and recovery timeframes, as well as communication channels and protocols between the parties. This complements metrics such as OTIF and enables damages or delays to be handled effectively.
A well-designed incident management protocol follows these steps:
- Detection and classification: the tracking system identifies a deviation (delay, damage, loss) and classifies it by severity. Not all incidents have the same impact or the same required resolution time.
- Early notification: the carrier has a maximum timeframe to communicate the incident to the sending company, generally between 2 and 4 hours from detection. This timeframe must be written into the SLA.
- Recovery plan: the agreement must specify what actions the carrier takes to correct the failure: same-day redelivery, reassignment to another vehicle, or direct compensation to the customer.
- Escalation: if the incident is not resolved within the agreed timeframe, the contract must define who assumes responsibility and what compensation mechanism is activated.
- Closure and record: every incident must be documented with its cause, resolution time, and action taken. This record feeds into the monthly SLA compliance reports.
The proactive implementation of early alerts and reaction plans within the SLA makes it possible to meet demanding targets from the initial stage without increasing operational costs. Moving from end-of-day monitoring to real-time alerts reduces redeliveries, improves the customer experience, and protects the operating margin. For companies with high shipment volumes, this change can represent a significant reduction in reverse logistics costs. You can find more resources on this approach on the logistics blog of Jetsend.
Key Points
Delivery SLAs by carrier only generate value when they combine auditable metrics, verifiable digital evidence, and incident response protocols.
| Point | Details |
|---|---|
| Precise contractual definition | The SLA must specify scope, KPI formulas, and what counts as a valid delivery. |
| Combined OTIF and OTD metrics | Using both metrics gives a complete view of the punctuality and completeness of each shipment. |
| Mandatory digital evidence | Signature, photo, or POD must be defined in the contract for the delivery to be auditable. |
| Incident protocols with deadlines | Each failure must have a maximum notification time and a written recovery plan. |
| Early alerts over reactive monitoring | Detecting deviations in real time reduces redeliveries and costs without increasing operations. |
What Nobody Tells You About Delivery SLAs
I have reviewed dozens of logistics contracts over the past few years, and the pattern that repeats most often is not the absence of SLAs, but the presence of empty SLAs. Documents that say "delivery within 48 hours" without defining when those 48 hours start counting, what happens if the recipient is not available, or what evidence proves that the delivery took place. These are contracts that exist to provide peace of mind, not to manage operations.
The most costly mistake I see in mid-sized companies is negotiating the shipping price down to the last detail and then signing the SLA without reading it. Later, when the carrier has a bad month with 15% delays, there is no contractual mechanism to claim anything. Penalties were not defined, evidence was not enforceable, and the SLA ends up being a document with no consequences.
My concrete recommendation: before renewing any contract with a carrier, ask for the OTIF history for the last six months. If the carrier cannot provide it, that already tells you everything you need to know about their management capability. A provider that measures its own performance rigorously is a provider worth negotiating with. One that does not measure, does not improve.
- Yurii
How Jetsend Helps You Manage Your Delivery SLAs
Managing delivery SLAs with multiple carriers is complex when done manually. Jetsend allows you to compare carriers in Spain in a single click, with access to competitive rates and centralized tracking from an intuitive dashboard. The platform facilitates real-time shipment monitoring, label printing, and returns management, all from one place. For companies looking to meet their service level agreements without increasing operational workload, Jetsend is the most direct starting point. In 2025, its users accumulated savings of up to €1.4M in shipping costs, proving that logistics efficiency and SLA control are not contradictory goals.
FAQ
What is a delivery SLA by carrier?
A delivery SLA by carrier is a formal contract that establishes measurable performance commitments between a company and its logistics provider, including deadlines, delivery conditions, tracking metrics, and consequences for non-compliance.
What is the difference between OTD and OTIF?
OTD measures whether the delivery occurred within the agreed timeframe, while OTIF measures whether the delivery was on time and with the complete quantity. OTIF is more demanding and better represents the actual experience of the end customer.
What evidence should a delivery SLA require?
The SLA must specify what type of evidence validates a delivery: recipient signature, geolocated photograph, delivery note, or a record in the carrier's tracking system with a verifiable timestamp.
What happens if the carrier does not meet the SLA?
If the SLA includes well-defined penalties, non-compliance triggers service credits or financial compensation calculated against monthly KPIs. Without written penalties, non-compliance has no automatic contractual consequences.
How often should delivery SLAs be reviewed?
SLAs should be reviewed at least every six months, or after any significant change in shipment volume, geographic coverage, or carrier performance. Periodic review allows tolerances and metrics to be adjusted to the current operational reality.
