COA vs Spot: What to Consider Before You Choose

A plain-English guide to flexibility, freight cost stability and the reality of your cargo flow.

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Choosing between spot shipments and a COA sounds simple. One gives you flexibility. The other gives you more structure.

In practice, the right choice depends on many moving parts: your cargo flow, timing, seasonality, market volatility, production needs, port conditions and risk exposure. That is why the question should rarely be answered on paper alone. It should be discussed in relation to the actual cargo you need to move.

- COA vs spot is easy to explain, but difficult to decide. The right setup depends on the cargo flow, timing, market exposure and what the customer needs to secure, says Kristian D. Kristensen, Managing Director, partner at Holst.

This article gives you a simple first overview. Not a final answer — but a useful starting point before you speak with Holst.

What COA and spot mean

Spot is a one-off shipment: one cargo, one fixture, based on the current market. It is flexible and often useful when volumes are irregular, timing changes, or the underlying commodity deal is not yet fixed.

COA stands for Contract of Affreightment. It is a framework agreement covering multiple shipments over a period of time. You agree the main commercial structure up front — such as volume, timing logic, nomination windows and freight terms — and then call off shipments as needed.

In simple terms:

Spot gives flexibility.
COA can give structure, planning and more predictable freight costs.

But the real question is not only which model sounds better. The real question is: What does your cargo flow look like?

Start with the cargo flow

Before you can decide between spot, COA or a hybrid setup, you need to understand how the cargo actually moves.

Important questions to ask yourself include:

Is the cargo flow predictable or irregular?
Are shipments evenly spread during the year?
Are volumes concentrated in summer, winter or specific market periods?
Is the cargo business-critical for production?
Do you need to secure more predictable freight costs?
Are you exposed to oil price changes, war risk or other geopolitical disruptions?
How much flexibility do you need if timing or volumes change?

For a production company with a stable and critical flow, a COA may help secure freight planning and reduce exposure to sudden market swings. For a company buying or selling opportunistically, spot may give the flexibility needed to act when the commercial opportunity is there.

In many cases, the best answer is not either/or. A hybrid setup can combine a structured baseline with spot shipments when extra flexibility is needed.

Common pitfalls

Both COA and spot can fail if the setup does not match reality.

COA pitfalls

Unclear timing or nomination windows: If timing is too tight or too vague, the agreement can become difficult to execute.
Over-commitment: If you commit to more volume than you can actually move, the structure can work against you.
Seasonality not considered: A cargo flow that looks stable on paper may be concentrated in certain periods, where market conditions are very different.
Mismatch between contract and actual cargo flow: A COA should reflect how the cargo really moves — including ports, timing, parcel sizes and operational constraints.

Spot pitfalls

Capacity risk: If the market tightens when you need to move, availability can become a challenge.
Oil price volatility: Fuel prices can change the economics of freight quickly.
Geopolitical risk: War, sanctions, restrictions or disruption can affect routes, availability and pricing.
Decision pressure: When cargo needs to move quickly, the time to evaluate options becomes shorter.

How Holst can help

Holst helps customers evaluate the full transport setup before deciding between COA, spot or hybrid.

That means looking at the cargo flow, timing, seasonality, route, port conditions, vessel availability, freight market exposure and operational risk. We help turn the relevant scenarios before a decision is made — so the chosen setup fits the real need.

- Our role is to help the customer see the scenarios before deciding. Sometimes COA is right. Sometimes spot is right. Often the answer depends on timing, cargo flow and what risk the customer can accept, says Kristian D. Kristensen.

The goal is not to force a standard model onto every customer. The goal is to understand what you need to move, when you need to move it, and what structure gives the best balance between flexibility, stability and risk.