---
title: "PSS (Peak Season Surcharge)"
description: "PSS (Peak Season Surcharge) is a variable surcharge that carriers may apply during times of peak demand. It may be applied at any time of year but tends to be more common before the fall/winter holidays and before Chinese New Year."
language: en
canonical: https://www.flex.thisisbrew.com/glossary/peak-season-surcharge/
lifecycle: live
dateModified: 2026-08-20T06:44:11Z
topics:
  - "Market Updates"
  - "Peak Season"
---

# PSS (Peak Season Surcharge)

PSS (Peak Season Surcharge) is a variable surcharge that carriers may apply during times of peak demand. It may be applied at any time of year but tends to be more common before the fall/winter holidays and before Chinese New Year.

## What is PSS?

PSS (Peak Season Surcharge) is a variable surcharge that carriers may apply during times of peak demand. PSS may be applied at any time of year, but tends to be more common before the fall/winter holidays and before [Chinese New Year](https://www.flex.thisisbrew.com/help/chinese-new-year-import-export/).

Carriers announce PSS as an additional fee on top of the base rate, though it may be canceled or mitigated at a lower rate. PSS functions similarly to GRI.

Back to the [full glossary](https://www.flex.thisisbrew.com/glossary/).

---

*This is a markdown version of [https://www.flex.thisisbrew.com/glossary/peak-season-surcharge/](https://www.flex.thisisbrew.com/glossary/peak-season-surcharge/) for AI/LLM consumption.*