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Last updated: 25 August 2026 (revision 2)
Last verified: 25 August 2026.
The fee itself is rarely what costs you the client. What costs you the client is a surprise — a surcharge that shows up on an invoice with no warning, no explanation, and no sense that you saw it coming and had their back. Right now, with CMA CGM, MSC, Hapag-Lloyd, and ONE all charging Panama Canal-related fees on overlapping but not identical timelines — and two of them raising in September — forwarders are having this conversation with clients constantly. This guide gives you the timing, the templates, and the framing to have it well.
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A customer who gets a surcharge notice two days before their cargo ships reads it as "you didn’t tell me" — even if the underlying fee is entirely outside your control. A customer who gets the same notice three weeks in advance, with a one-line reason attached, reads it as "you’re on top of this." Same fee, same amount, completely different relationship outcome.
The goal of every template and framing choice below is the same: make it obvious that the surcharge originated with the carrier and the Panama Canal Authority, not with you, and that you told them as early as you credibly could.
Whether you can pass a surcharge through at all depends on the rate agreement you have with that client. A fixed all-in rate for a defined period may not permit a mid-term pass-through; a floating or index-linked arrangement usually does, and many contracts name specific surcharge categories that are passable and others that are not.
This question sits upstream of every template in this guide. Sending a well-crafted notice about a charge you have no contractual right to pass on is worse than sending nothing — it invites a dispute you will lose. Check the clause first, and where it is ambiguous, raise it as a conversation rather than an invoice line.

These are starting points — adjust tone and specifics to your house style and the client relationship. Each is deliberately short; a surcharge notice that reads like a legal disclaimer gets skimmed, not trusted.
Template 1: Advance Notice (3–4 weeks out)
Template 2: Close-to-Effective-Date Reminder (3–5 days out)
Template 3: Offering a Routing Alternative
Template 4: When a Client Pushes Back
Vague language ("carrier costs are rising") reads as evasive. Specific, sourced language reads as credible. A few ways to make the explanation concrete without turning the email into a white paper:

Even when a client can’t or won’t switch routings, offering to look is itself a trust-building move — it signals you are actively managing their cost, not passively passing fees through.
Sending the right message to the right client at the right moment depends on being able to filter your book quickly. A few practical filters worth setting up before the next surcharge lands, rather than during it:

1- Can I always pass a carrier surcharge through to my client?
No — it depends on your rate agreement. A fixed all-in rate for a defined period may not permit a mid-term pass-through, while floating or index-linked arrangements generally do, and some contracts name which surcharge categories are passable. Check the clause before you send a notice; a charge you have no contractual right to pass on is a dispute waiting to happen, not a communication problem.
2- How far in advance should I tell clients about a carrier surcharge?
As soon as the carrier publishes it — typically several weeks before the effective date. CMA CGM, for example, announced its US$500/TEU Panama Canal rate on 12 August for a 10 September effective date. Passing that notice along immediately, rather than waiting, is what turns a surprise fee into a planned one.
3- What if a client asks why the surcharge is so high?
Explain the mechanism briefly and specifically: the Panama Canal Authority has reduced the maximum vessel draft and, from September, is also cutting daily transit slots, so less cargo moves through per sailing and the cost per container rises — which the carrier passes through as a surcharge. Where possible, offer to share the carrier’s own published notice rather than only your summary of it.
4- Should I absorb part of the surcharge to keep a client happy?
That’s a business decision specific to your margins and the relationship, not something with a universal right answer. What is worth avoiding regardless is presenting an absorbed cost as if it were the full carrier fee — if you are softening the number, say so, since a client who later sees the full carrier rate elsewhere will feel misled.
5- How do I handle a surcharge whose exact basis (per TEU vs per container) is unclear?
Say so plainly rather than guessing. Several carriers’ 2026 Panama Canal surcharge notices don’t specify whether a 40ft container is charged once or twice under a "per TEU" rate. Tell the client you’re confirming with the carrier rather than quoting a number you might have to revise.
6- Is it worth offering an alternative routing even if the client probably won’t switch?
Yes, if it’s genuinely relevant to their lane — the offer itself signals active account management even when declined. It is not worth it for a client whose cargo has no realistic alternative, where the offer reads as filler rather than help.
See also: Panama Canal Surcharges 2026: Full Carrier Guide and CMA CGM vs MSC vs Hapag-Lloyd: Panama Canal Fee Comparison for the underlying rate data referenced in the templates above.
Every template on this page assumes you already know which clients are affected and when the rate changed. That is the part that actually breaks. When the rate lives in one system and the client list in another, the notice depends on someone remembering — and on a busy week, nobody does. Shipthis keeps rate management and CRM in the same platform, so the client list you need is one filter away from the rate that changed.
Want to see it on your own book? Book a demo and ask to see a mid-month surcharge change alongside the list of accounts exposed to it. Or start with the numbers — Shipthis pricing is $89 per user per month, every module included.
Related reading: Panama Canal Surcharges 2026: Full Carrier Guide · Why Panama Canal Draft Restrictions Raise Freight Costs · CMA CGM vs MSC vs Hapag-Lloyd: Panama Canal Fee Comparison