You booked at one number. The confirmation, or the invoice, showed another. Before you assume the quote was a bait-and-switch, it's worth knowing that a freight quote is a snapshot of a specific shipment at a specific moment — and a handful of things that happen between that moment and departure can legitimately move the price. The trouble is most shippers were never told which things those are, so every change reads as suspicious.
There's good news and bad news here. The good news: the list of legitimate reasons a quote can change is short, and every one of them traces back to something concrete you can check. The bad news: if your forwarder can't point to which one applies, that's a real problem worth raising — a quote shouldn't drift for no reason.
What actually makes a freight quote change after booking?
A quote changes after booking for one of four reasons: the cargo details changed, a time-sensitive surcharge moved between quote and shipment, the scope of the booking expanded, or a new charge appeared that no quote could have priced in advance because it depends on what happens after the container or airway bill moves. Anything outside those four categories isn't a legitimate quote change — it's an error worth querying.
Knowing which bucket a change falls into tells you whether to accept it, ask for documentation, or push back.
Reason 1: Your cargo details changed after you booked
The base freight rate — OFR for ocean, AFR for air — is priced against a specific weight, volume, and equipment type. If the actual cargo differs from what was declared at quote time, the rate recalculates against the real numbers, not the estimated ones.
This is the most common driver of a changed number, and it's rarely a surprise once you trace it:
- Weight or volume grew. LCL is priced per CBM or per weight/measure, whichever is greater — a shipment that comes in heavier or bulkier than declared shifts the pricing basis, not just the total.
- Chargeable weight for air moved. Air freight prices on the greater of actual weight and volumetric weight (roughly a 1:6000 volumetric ratio). A packing change after quoting — different cartons, different palletization — can push chargeable weight up even if actual weight stayed flat.
- Container size changed. A 20GP quote doesn't carry over to a 40HC booking. Different equipment, different rate.
The fastest way to confirm whether this is what happened: check the cargo figures on your original quote against what was actually declared at booking. The free cargo calculator computes CBM, gross weight, and chargeable weight from your carton or pallet dimensions, so you can verify the numbers independently rather than taking either figure on faith.
Reason 2: Time passed, and a surcharge moved with it
Bunker and fuel surcharges (BAF/FSC) track published index changes and are not locked for as long as the base freight rate. A quote held open for several weeks, or a shipment that departs later than originally planned, can pick up an index move that has nothing to do with your cargo.
Every quote carries an implicit or explicit validity window — commonly measured in days, not weeks — because carriers themselves only guarantee base rates for a limited period. Once that window closes, a re-quote may show a different BAF, FSC, or in some markets a peak season surcharge (PSS) tied to capacity conditions on the lane, none of which the original forwarder controlled or could lock indefinitely.
| OFR / AFR (base freight rate) | Should match the quote unless cargo details changed |
|---|---|
| BAF / FSC (fuel surcharge) | Can move if published indexes change before departure |
| THC (terminal handling) | Set by the terminal; stable unless port tariffs change |
| PSS (peak season surcharge) | Can be added on capacity-constrained lanes near booking |
If a surcharge moved, ask for the index reference or effective date. A legitimate surcharge change is traceable to a published rate; one that isn't should be questioned.
Reason 3: The scope of the booking grew
A quote only prices what was requested at the time. If you add a service after booking — trucking that wasn't in the original scope, customs brokerage, cargo insurance, a special-cargo surcharge for dangerous goods — the total rises because the shipment now covers more ground, not because the original pricing was wrong.
This shows up most often on move type. A port-to-port quote leaves origin trucking, export documentation, import trucking, and final-mile delivery outside the number entirely — those costs don't vanish, they simply weren't priced yet. If you later ask for door-to-door service, or add customs brokerage that wasn't part of the original request, the new total reflects a bigger job, not a broken promise. The how shipping works guide breaks down what each of the four move types actually includes at origin and destination, which is worth checking before you assume a quote should have covered something it never claimed to.
Cargo insurance follows the same logic: it's quoted and invoiced as its own line, with terms set by the insurer rather than bundled into the freight total, so adding it after the fact is a scope change, not a repriced freight rate.
Reason 4: Charges that were never on the quote to begin with
Some charges can't appear on any freight quote, no matter how good the forwarder, because they depend entirely on what happens after the shipment moves. Demurrage, detention, storage, exam fees, and customs duties all fall into this category — their absence from your original quote wasn't an oversight.
- Demurrage — a carrier charge for a loaded container sitting inside the port past its free days, whether an import wasn't collected in time or an export was gated in too early.
- Detention — a carrier charge for keeping the container outside the terminal past the free return window, once it's been picked up but the empty box isn't returned on schedule.
- Storage (STG) — a separate terminal-levied charge that can run alongside demurrage, triggered by cargo sitting beyond a free period.
- Exam fees — if customs selects the shipment for a physical exam, the exam, any re-devanning, and extended dwell time land on the invoice with no way a quote could have anticipated them.
- Duties and taxes — assessed by customs at entry, based on declared value and tariff classification. No accurate freight quote predicts a future duty amount, because customs itself hasn't assessed it yet at quoting time; a forwarder's operators and its customs-brokerage partners can flag likely classification questions in advance, but the number is set at the border, not on paper beforehand.
None of these belong on a comparison between "what I was quoted" and "what changed" — they were never part of the quote's scope, on any forwarder's paperwork, at any point.
How to tell if a change is legitimate
Run through this before assuming the worst:
- Did the cargo details change? Compare declared weight/volume/equipment on the quote against what was actually booked.
- Did time pass? Check the quote's validity window against your actual departure date — a surcharge move after expiry is normal; one within the validity window is not.
- Did the scope grow? Confirm whether you (or someone on your team) added a service — trucking, brokerage, insurance — after the original quote.
- Is the new charge one that no quote could have included? Demurrage, detention, storage, exam fees, and duties fall outside any quote by definition.
- If none of the above apply, ask for a written explanation. A forwarder should be able to point to the specific line and the specific reason it moved. If they can't, that's the actual problem — not the fact that a number changed.
How Holo Cargo helps
Holo Cargo quotes are itemised by section — origin, freight, and destination — so if a line does move, you can see exactly which one and cross-check it against the reasons above rather than guessing from a single total. What we quote on those charges is what lands on the invoice; anything added afterward, like demurrage or a scope change, comes with a clear explanation tied to what actually happened on the shipment.
