In Inox Air Products Pvt. Ltd. case, the Tamil Nadu Appellate Authority for Advance Ruling clarified the GST classification of bundled oxygen supply arrangements involving installation of tanks, pipelines, and continuous delivery systems. The issue was whether such arrangements constitute a supply of goods or services. Applying Sections 2(30), 2(90), and 8 of the GST law, the authority held that the transaction qualifies as a composite supply where various elements are naturally bundled. The crucial test was identifying the principal supply, which was determined to be oxygen (goods), as this was the primary objective of the customer. Infrastructure such as tanks and pipelines was held to be incidental. Consequently, the entire transaction was classified as a supply of goods and taxed accordingly. The ruling emphasizes that classification depends on the substance of the transaction and not the mode or complexity of delivery.
Let me start with a simple question…
Suppose you’re running a hospital.
You don’t want the headache of handling oxygen cylinders every day. So, you enter into an arrangement with a supplier. They install a big storage tank in your premises, connect pipelines, and oxygen flows directly whenever required.
Now pause and think:
Are you buying oxygen (goods)?
Or are you paying for a facility/service?
This is not just a theoretical doubt. This exact issue reached the Tamil Nadu Appellate Authority in the case of Inox Air Products Pvt. Ltd.
What was actually happening in this case?
Inox was doing something quite common in industrial practice:
- Installing cryogenic tanks at customer sites
- Supplying gases like oxygen continuously
- Delivering through pipelines
- Charging based on consumption
So, it wasn’t just a “sale across the counter.” It was a bundled arrangement.
And that’s where GST complications begin.
The real confusion
From a practical lens, the department initially thought:
“This looks like a service… you’re installing infrastructure, maintaining systems, ensuring continuous supply.”
And honestly, that’s not an unreasonable view.
Because when you see:
- Tanks
- Pipelines
- Continuous monitoring
…it feels like a service.
But GST law doesn’t run on feelings it runs on legal characterization.
Section 7 Supply exists?
No debate here.
There is consideration, business activity so yes, supply exists.
Now the real question: What kind of supply?
This is where Section 2(30) (Composite Supply) comes in.
Think of it like this:
When multiple things are supplied together, and they are naturally bundled, we don’t split them we treat them as one.
Then comes the most important concept: Principal Supply (Section 2(90))
Ask yourself:
What is the main thing the customer wants?
Everything else is just supporting it.
Section 8 The final tax rule
Once you identify the principal supply:
The entire transaction follows that classification.
So what did the AAAR do differently?
Instead of getting distracted by the infrastructure, the AAAR asked a very grounded question:
“Why is the customer entering into this arrangement in the first place?”
And the answer was crystal clear:
The customer wants gas (oxygen)
Not tanks
Not pipelines
Not engineering services
Those are just means to an end.
And that changed everything…
AAAR held: This is a Composite Supply
Because:
- Supply of gas
- Tank installation
- Pipeline connectivity
…are all naturally bundled and supplied together.
Next step: Identify the principal supply
And here comes the key takeaway:
The principal supply is gas (goods)
Everything else is incidental.
Final outcome
Applying Section 8:
Entire transaction = Supply of goods
Tax accordingly as goods
Example 1: Coffee at a café
You go to a café.
- You sit in a nice place
- AC is running
- Music is playing
But what are you paying for?
Coffee
Same logic applies here.
Example 2: Oxygen supply
- Tank installed
- Pipeline running
- System maintained
But what is the hospital paying for?
Oxygen
Not the “experience” of oxygen delivery.
Example 3: When it would be a service
Now flip the situation:
- Only tank is given on rent
- No gas supplied
That becomes leasing service
So, context matters.
A very important takeaway for professionals
This case quietly reinforces a powerful GST principle:
Don’t get carried away by the mode of delivery
Just because something is:
- Automated
- Continuous
- Infrastructure-heavy
…doesn’t make it a service.
Always ask this one question
“What is the customer really paying for?”
If you get this right, classification becomes much easier.
Why this ruling matters in real life
This is not just about oxygen.
This logic applies to:
- Industrial gases
- LNG supply
- Water supply systems
- Even certain energy distribution models
Anywhere delivery mechanisms are complex, but the underlying supply is tangible.
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