Reefer container rates: why perishable freight prices on a different clock
Reefer capacity is finite, seasonal and directional in a way dry capacity is not. What drives the premium, when to fix, and why the dry-box index will not help you.
Key takeaways
- The binding constraint is the number of powered plugs on the vessel and in the yard, not deck space: reefer capacity does not loosen when the dry market goes quiet.
- Demand follows harvest calendars, so the tight weeks fall outside the July–October dry peak: a lane can be impossible in February and wide open in August.
- A reefer quote carries lines a dry quote does not — pre-trip inspection, plug-in, genset hire, cold treatment — so base ocean freight is a smaller share of the invoice.
- Benchmark against your own paid rates on that lane in the same week last season, and secure equipment before arguing about price.
A reefer booking fails for reasons a dry booking never does. The vessel has space, the terminal has room, and the carrier still declines — because every powered socket on that sailing is committed. That is the first thing to understand about reefer container rates: they price against a constraint with little to do with how full the ship is.
The result is a market on its own timetable, one that tightens while the dry trades are quiet and responds to rainfall in a growing region rather than to retail order books.
Plug capacity, not deck space, is the binding constraint
Every containership is built with a fixed number of reefer receptacles, concentrated in particular bays and tiers. That number is set at the shipyard and cannot be raised in service. It is a small fraction of total slots, and it caps how many refrigerated boxes a sailing can take however much steel is empty around them.
The same ceiling exists ashore. Terminals have a finite count of powered stacks, and each plugged box needs monitoring — temperatures logged, alarms answered, units restarted. Where a yard is running hot, reefer positions get rationed early, which is one reason congestion reaches perishable costs first.
Then the equipment. A refrigerated 40′ high-cube costs a multiple of a dry box, carries a compressor needing scheduled service, and gives up internal volume to insulation and machinery — roughly 67 cubic metres against 76 in a dry 40′ HC. The fleet is smaller and cannot be expanded quickly, so carriers allocate these boxes rather than dump them wherever a port runs short.
The season is agricultural, not retail
Dry peak season is a retail phenomenon: goods move ahead of Western holiday shelves, roughly July to October. Reefer peaks are set by when fruit comes off the tree.
Southern Hemisphere fruit dominates the northbound flow from about December through April — Chilean and Peruvian grapes, blueberries and stone fruit, Chilean and Argentine cherries, the cherry programme compressing violently into the weeks before Chinese New Year because the value of that crop depends on landing inside the window. Southern African citrus builds a second peak from roughly May to September. Bananas from Ecuador and Central America run all year and form the base load under everything else.
Two things follow. A corridor can be tightest in the weeks the dry market is softest, so a carrier’s general rate direction tells you nothing about your booking. And harvest timing moves with weather: a fortnight of rain does not reduce volume, it compresses it.
The directional imbalance is sharper than on dry
Perishable trade is close to one-way. Fruit leaves Valparaíso, Callao and Cape Town; very little refrigerated cargo comes back. On a dry lane an imbalance is a matter of degree and the backhaul still earns something. On a reefer lane the return is often empty repositioning, and the cost of getting the box home sits in the headhaul rate.
That cost is lumpy: empties must be moved, cleaned, tested and staged at origin depots ahead of the picking curve, so the carrier spends on your season before earning from it. It also explains why reefer boxes are sometimes offered on the return leg for non-perishable cargo at close to dry rates — a loaded repositioning move beats an empty one.
What actually makes up a reefer quote
Comparing a reefer number to a dry number on the same lane is not like-for-like: the two are built from different parts.
| Cost line | Dry 40′ HC | Reefer 40′ HC | What drives it |
|---|---|---|---|
| Base ocean freight | Yes | Yes, at a premium | Plug scarcity on the sailing |
| Terminal handling | Yes | Yes, higher | Separate reefer tariff |
| Plug-in and monitoring | No | Yes, both ends | Per day; free time is short |
| Pre-trip inspection (PTI) | No | Yes | Powered test before release |
| Genset hire | No | On inland legs | Own power source and fuel |
| Cold treatment or controlled atmosphere | No | Where required | Probes, supervision, longer transit |
| Cargo insurance | Standard | Higher | Value and total-loss exposure |
| Detention and demurrage | Standard clock | Less free time, plus power | Scarce position, energy drawn |
Take a lane where the dry 40′ HC is quoted at $1,800 and the reefer at $3,400. Rather than argue over a $1,600 premium, establish which rows sit inside the $3,400 and which arrive later as separate invoices — the discipline that applies to any surcharge on an ocean bill.
Cargo-side requirements that move the number
Controlled atmosphere (CA) — managing oxygen and carbon dioxide inside the box to slow ripening — carries a per-container premium and restricts you to equipment fitted for it, which tightens availability before it raises price. Cold treatment, where cargo is held at a specified pulp temperature for a set number of days to meet a phytosanitary requirement, is a condition of market access rather than a service choice: it needs calibrated probes, supervised loading and an unbroken record, and a failed record can mean refusal at the border.
A temperature excursion is not a freight problem
When a set point drifts, the exposure is the cargo, not the container: one rejected load can exceed a season of freight on that lane. Agree in advance who monitors, at what interval, and what happens when an alarm fires at a transhipment port at three in the morning.
Why a dry-box index will not track your reefer costs
Most published container benchmarks sample dry cargo. Their movements reflect dry capacity discipline, blank sailings and dry demand — none of which governs plug availability. A dry index can fall through a quarter while reefer rates on the identical port pair firm, because Southern Hemisphere volumes are peaking and the sockets are full. Reefer is also thinner and more contractual, so any published spot sample is smaller and noisier. The cautions in our guide to what a container freight rate index measures apply with extra force here.
Three better reference points. Your own paid rates on that lane in the same week last season, adjusted for crop volume. The carrier’s seasonal tariff, which at least prices the same equipment. And plug availability itself — when carriers start declining or rolling reefer bookings, price follows within weeks. The lane-level rate explorer gives the dry baseline under a corridor; measure the gap to reefer rather than assume it.
Fixing versus staying on spot around a known harvest window
Perishable shippers have an advantage most dry shippers lack: the demand curve is known months ahead, within the error bars of the weather. That argues for fixing, but with the emphasis in an unusual place.
Fix the equipment and the weekly allocation first, the rate second. A keen number with no committed plugs is worthless in week three of a cherry programme. Negotiate a weekly profile that follows the picking curve rather than a flat season total — the contract clauses that matter more than the rate carry more weight here, because there is no substitute equipment.
Stay on spot for the shoulders. The weeks either side of a peak are where spot is loosest and a flat seasonal rate looks worst; committing the core and buying the edges usually beats fixing the season at one number. Where a corridor is exposed to disruption, take that risk in volume rather than price, and watch the signals in seeing port congestion coming three weeks early.
What to put to your carrier before you book
- How many reefer plugs does this service have, and what is my allocation by week rather than by season?
- Which of PTI, plug-in and inland genset sit inside the quoted rate, and what are the tariffs for the rest?
- How much free time on a plugged box at each end, and what does power cost after it expires?
- Who monitors temperature in transit and at transhipment, and how is an alarm escalated to me?
- If you cannot supply equipment in a committed week, what happens — rollover, alternative sailing, or nothing?
- On cold treatment lanes, who calibrates the probes and who carries the exposure if the record fails?
Get those answered in writing before the first pick. Once the fruit is on the packhouse floor, they are settled in the carrier’s favour.
Frequently asked questions
Why are reefer container rates higher than dry rates on the same lane?
Because a reefer moves against a scarcer resource and carries cost lines a dry box does not. A vessel has a fixed number of powered reefer sockets, far fewer than its container slots, and the boxes themselves cost several times a dry equivalent to buy, service and reposition.
On top of the ocean freight you pay for pre-trip inspection, plug-in and monitoring at both terminals, and often genset hire on inland legs. The premium is a stack of charges, not one line.
When is reefer capacity tightest?
Reefer capacity peaks with harvests, not with retail restocking. The heaviest northbound pressure runs from roughly December to April as Southern Hemisphere fruit from Chile, Peru, Argentina and South Africa moves to Europe, North America and Asia, with a sharp spike around Chinese New Year for Chilean cherries.
Southern African citrus adds a second peak from about May to September. Both sit outside the classic July–October dry-box peak season.
Does a container freight rate index cover reefer rates?
Most headline container indices measure dry cargo only, so they will not track what you pay for refrigerated freight. A dry benchmark can fall through a quarter while reefer rates on the identical port pair are rising, because the two are constrained by different things.
Check the methodology before assuming coverage. If reefer is included at all, confirm the equipment type, the season sampled and whether plug charges sit inside or outside the quoted figure.
How far ahead should I book reefer equipment for a harvest window?
Secure equipment before you settle the rate, and start the conversation well before the first pick — for a large seasonal programme that usually means two to three months out, longer if your origin depot is thinly stocked. Empty positioning, not vessel space, is the long pole.
Agree a weekly equipment profile against your expected picking curve rather than a single season total.
What is a pre-trip inspection and who pays for it?
A pre-trip inspection (PTI) is a powered test of the refrigeration unit, controls and sensors before the box is released to a shipper. It is standard practice for perishable bookings, and the cost is usually recovered from the shipper, either as a named charge or absorbed into the all-in rate.
Ask which, because an all-in rate that quietly excludes PTI and plug-in is not comparable to one that includes them.