# On-time performance rate of maritime shipping

*Last updated: 2026-06-18*

> Unlike simple schedule adherence, the on-time performance (OTP) rate in maritime shipping measures the share of vessel arrivals that fall within an agreed tolerance window around the scheduled port-of-discharge date.

Unlike simple schedule adherence, the on-time performance (OTP) rate in maritime shipping measures the share of vessel arrivals that fall within an agreed tolerance window around the scheduled port-of-discharge date. Carriers, freight forwarders, and shippers rely on this KPI to evaluate service reliability and to build resilient supply chain timelines. Industry analysts such as Sea-Intelligence publish regular global OTP reports, revealing how sharply the metric fluctuates with market conditions – from severe weather and port congestion to canal disruptions. Service contracts may stipulate a minimum OTP threshold, with shortfalls triggering penalty clauses or freight rebates. For shippers running just-in-time operations, OTP is often a more meaningful performance indicator than quoted transit times alone.

**Source:** [https://www.logisticsglossary.com](https://www.logisticsglossary.com)

## Quick Facts

| Property | Value |
|---|---|
| Term | On-time performance rate of maritime shipping |
| Language | EN |
| Word count | 113 |
| Last updated | 2026-06-18 |
| Source | https://www.logisticsglossary.com |

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*Logistics Glossary — Freight Academy: [https://www.freight-academy.com/en/glossary/on-time-performance-rate-of-maritime-shipping](https://www.freight-academy.com/en/glossary/on-time-performance-rate-of-maritime-shipping)*

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