Reaction Profitability Guide

Reaction profitability in EVE Online is one of those areas that looks simple on the surface—“buy moon materials, react them, sell the output”—but becomes significantly more complex once you account for supply chains, market spreads, taxes, and logistics.

A reaction can be “profitable” on paper while still losing ISK in practice. The difference comes down to whether you are calculating real economic profit or just output price minus input price.

This guide breaks down how reaction profit actually works and how industrialists evaluate whether a reaction chain is worth running.

What “Profitability” Actually Means in Reactions

Reaction profitability is not just:

Output value − Input value

It is:

Output value − (Inputs + Taxes + Fuel + Logistics + Opportunity Cost + Market friction)

If you ignore any of these, your calculations will be incomplete.

Step 1 – Calculate True Input Costs

Your first step is determining the real cost of materials going into the reaction.

Inputs include:

Moon goo (raw materials)
Gas (for biochemical chains)
Purchased reaction materials (if mid-chain sourcing)
Delivery costs of materials to structure

Common mistake:

Using Jita sell price instead of buy orders.

This immediately:

Inflates your costs
Makes reactions look less profitable than they are
Hides real margins

Step 2 – Understand Output Value

Output value depends heavily on:

Jita sell price (benchmark)
Regional demand
Trade volume (liquidity)
Competition in your chosen hub

Important concept:

High price does NOT mean high profitability

If an item:

Sells slowly it may be worse than a lower-value item with fast turnover.

Step 3 – Include Structure Costs

Every reaction job consumes infrastructure value.

These include:

Structure fuel costs
Reaction service fees
Corp/alliance taxes
System upgrades (if applicable)

Why this matters:

Even a small per-cycle fee becomes significant when:

Running dozens of reactors
Operating continuously
Scaling into reaction farms

Step 4 – Factor in Taxes and Market Fees

Once your reaction is complete, you still lose ISK when selling.

Fees include:

Broker fees (listing orders)
Sales tax (on completed sale)

Impact:

Low-margin reactions can become:

Break-even
Or even loss-making

after fees are applied.

Step 5 – Logistics Cost (Often Ignored)

Reaction profitability is heavily influenced by movement of goods.

Costs include:

Hauling time
Fuel (for jump freighters or structures)
Gank risk (insurance-equivalent cost)
Time delay between production and sale

Key insight:

If logistics is inefficient, your reaction is less profitable even if prices are good.

Step 6 – Opportunity Cost of Capital

Every ISK used in reactions is locked until:

Inputs are processed
Outputs are sold

During that time, ISK cannot be used elsewhere.

Example:

2B ISK locked in reaction chain
Could instead be used for trading or flipping

That lost potential is part of your real cost.

Step 7 – Calculate Per-Cycle Profit

Now bring everything together.

Formula:

Profit per cycle = Output value
− Input cost
− Taxes
− Structure fees
− Logistics cost
− Opportunity cost (optional but important)

What this reveals:

Some reactions that look profitable are not worth running
Some low-margin reactions scale extremely well
Profit is often volume-driven, not per-unit driven

Step 8 – Evaluate ISK per Hour (Critical Metric)

Reactions should always be evaluated as:

ISK per hour per reactor

Not:

Profit per batch
Profit per unit
Total output value

Why ISK/hour matters:

Because reactors:

Run continuously
Consume fixed time cycles
Scale linearly

Types of Reaction Profitability

1. High-Margin / Low Volume

Rare materials
Strong price per unit
Slower turnover

✔ Good for small farms

⚠ Sensitive to price drops

2. Low-Margin / High Volume

Common moon materials
Tight spreads
Massive scaling potential

✔ Best for reaction farms

✔ Stable long-term income

3. Chain-Dependent Profit

Composite reactions
Multi-step production
Higher complexity

✔ Highest potential profit

⚠ Highest risk and complexity

Market Factors That Affect Profit

1. Jita Price Compression

Jita often sets the “true” value of materials.

2. Regional Price Spreads

Some regions offer higher margins due to scarcity.

3. Supply Chain Disruptions

Wars or moon control changes can spike profits.

4. Overproduction

Too many players reacting the same material reduces margins.

Common Profit-Killing Mistakes

1. Using sell orders for inputs

Overinflates cost structure.

2. Ignoring tax impact

Margins disappear after sale.

3. Running unbalanced reaction chains

One bottleneck breaks entire profit flow.

4. Overbuilding infrastructure

Idle reactors = wasted ISK.

5. Not scaling correctly

Small setups hide inefficiencies that become losses at scale.

How to Improve Reaction Profitability

1. Use buy orders for inputs

Reduces baseline material cost.

2. Focus on high-turnover materials

Liquidity matters more than raw margin.

3. Minimise logistics distance

Shorter routes = higher effective profit.

4. Run continuous cycles

Idle time = lost ISK/hour.

5. Specialise reaction chains

Avoid spreading across too many markets.

Advanced Profit Strategy: Chain Optimisation

Instead of evaluating single reactions, evaluate full chains:

Example chain:

Moon Goo → Simple Reaction → Composite Reaction → Market

Optimise:

Input cost at first step
Efficiency at every transformation stage
Final market liquidity

Final Summary

Reaction profitability in EVE Online is determined by far more than simple input vs output pricing. True profit requires accounting for material sourcing costs, structure fees, taxes, logistics, and opportunity cost. Even seemingly profitable reactions can become inefficient once these hidden factors are included.

The most successful industrialists evaluate reactions not as isolated jobs, but as part of a continuous ISK-per-hour system, optimised for scale, stability, and market flow.

In EVE industry, profit is never just about what you produce—it is about how efficiently you convert time, materials, and infrastructure into ISK.