Freight Surcharge Decoder — GRI vs PSS

If you've received a freight quote during peak season, you've likely seen both a GRI (General Rate Increase) and a PSS (Peak Season Surcharge) on the same invoice. They sound similar, but they serve different purposes and are triggered by different market conditions. This guide explains the key differences and how to manage both.

What Is GRI?

General Rate Increase (GRI) is a scheduled, announced rate hike applied across a carrier's entire network or a specific trade lane. Carriers typically issue GRIs 30 days in advance, and they apply to all shippers equally. Think of it as a base freight rate increase — it's not tied to any specific event, but rather reflects the carrier's need to restore profitability or cover rising costs.

GRI Timing Patterns

• January 1 — most common annual GRI window across all major alliances
• Mid-year (July) — secondary GRI cycle when market conditions warrant
• Post-crisis recovery — carriers may issue unscheduled GRIs after prolonged rate depression

What Is PSS?

Peak Season Surcharge (PSS) is a temporary surcharge imposed during periods of exceptionally high demand — typically before major consumer holidays (Christmas, Chinese New Year) or when port congestion creates capacity shortages. Unlike GRI, PSS is not permanent and is supposed to be removed when demand normalizes.

PSS rates vary widely by route and carrier, ranging from $100 to $800 per 20ft container during peak periods.

When PSS Typically Triggers

• Before Chinese New Year (January–February)
• Before Q4 holiday season (September–December)
• After port congestion or blank sailings

Key Differences

Dimension	GRI	PSS
Purpose	Base rate increase	Temporary demand surcharge
Duration	Permanent (until next GRI)	Temporary (weeks to months)
Announcement	30 days advance notice	Often 5–14 days notice
Applicability	All shippers, all cargo	May vary by lane or cargo type
Frequency	1–4 times per year	Tied to seasonal peaks

Why They Often Appear Together

Carriers frequently layer PSS on top of GRI when market conditions are exceptionally strong. During the 2021–2022 supply chain crisis, shippers saw GRI increases of $400/40ft plus PSS of $600/40ft on Asia–North Europe routes — a combined $1,000 surcharge on top of the base rate.

How to Manage GRI + PSS Exposure

• Lock in annual rates before peak season announcement windows
• Book early — carriers offer better rates for advance bookings before PSS kicks in
• Monitor carrier announcements — GRI notices are public; subscribe to carrier rate bulletins
• Diversify carriers — not all carriers announce GRIs on the same date or at the same level