The Old Machine They Sold for Scrap: How Section 18(6) Turned a Fixed Asset Sale Into a GST Bill

A textile-components manufacturer in Coimbatore, run by two brothers, had bought a CNC cutting machine four years ago for Rs 10 lakh plus Rs 1.8 lakh GST. They had claimed the full Rs 1.8 lakh as input tax credit (ITC) at the time, which was perfectly legal.

By year four, the machine was tired and slow. A local buyer offered them Rs 3 lakh for it. The brothers raised a simple sale receipt, deposited the money, and moved on. In their mind, this was an old asset being disposed of, not a real "sale" of goods.

Eight months later, during a routine scrutiny of their returns, an officer flagged something: the outward supply of a capital asset had not been reported correctly, and GST on it appeared understated. That single oversight snowballed into a demand with interest.

The GST Problem They Faced

The brothers made two classic mistakes.

First, they treated the machine sale as "not a supply." But under GST, when you sell business assets on which ITC has been claimed, it is very much a taxable supply. Selling capital goods is not exempt just because the item is old.

Second, they did not understand Section 18(6) of the CGST Act. This section says that when you supply capital goods or plant and machinery on which ITC was availed, you must pay an amount equal to the higher of two figures:

• the ITC taken on that asset, reduced for the period it was already used, or
• the tax on the actual transaction (sale) value.

The idea is simple. The government allowed you full credit assuming you would use the asset in your business for its useful life. If you dispose of it early, part of that credit has to come back.

How They Solved It Correctly

With help from their CA, they reworked the numbers using Rule 44(6) read with Rule 40(2). GST law treats the useful life of capital goods as five years (60 months).

Here is the calculation they should have done:

• Original ITC claimed: Rs 1.8 lakh
• Useful life: 60 months
• Actual usage: 48 months
• Remaining life: 12 months
• ITC to reverse (pro-rata): Rs 1.8 lakh divided by 60, multiplied by 12 = Rs 36,000

Now compare this with tax on the sale value. Sale price was Rs 3 lakh; at 18% that is Rs 54,000.

Since Section 18(6) requires the higher amount, they were liable to pay Rs 54,000, not the Rs 36,000 reversal figure. The correct step was to raise a tax invoice (not a plain receipt) showing Rs 3 lakh plus Rs 54,000 GST, report it as an outward supply in GSTR-1, and pay the tax in GSTR-3B.

Because they had missed it, they paid the Rs 54,000 with interest under Section 50, but avoided a bigger penalty by voluntarily correcting the position before adjudication concluded.

The Key Lesson for Readers

The disposal of any business asset on which you claimed ITC is a taxable event. This applies to machinery, laptops, office furniture, air conditioners, and even a delivery van (subject to separate rules for motor vehicles).

Remember these practical points:

• Always issue a proper tax invoice for asset sales, not a receipt or challan.
• Calculate both figures under Section 18(6) and pay the higher one.
• Use 60 months as the standard useful life for the pro-rata reversal.
• If you scrap an asset for near-zero value, you may still owe the reversal amount, so plan disposals carefully.
• Report the sale in your outward supplies; do not hide it as a non-GST entry.

A quiet asset sale is exactly the kind of transaction scrutiny officers look for, because the ITC trail already exists in the system.

How GSTClear Helps

GSTClear flags capital goods that were purchased with ITC and reminds you at the point of sale to apply Section 18(6). Our platform runs both calculations automatically, tells you the higher liability, generates a compliant tax invoice, and maps the entry to the correct fields in GSTR-1 and GSTR-3B. No more surprise demands during scrutiny.

If you are planning to sell old machinery, vehicles, or equipment, let GSTClear compute your exact liability before you finalise the deal. Start your free compliance check today and keep every asset sale audit-ready.

FAQ

Do I have to pay GST if I sell an old asset at a loss?

Yes. Under Section 18(6), you pay the higher of the pro-rated ITC reversal or the tax on the sale value. Even a loss-making sale usually attracts the reversal amount, unless no ITC was ever claimed on that asset.

What if I never claimed ITC on the asset?

If no input tax credit was availed at purchase, the special reversal under Section 18(6) does not apply. However, the sale value may still be taxable as an outward supply depending on your registration and the nature of the goods.

What useful life should I assume for capital goods?

GST rules treat the useful life as five years, that is 60 months, from the invoice date. The remaining months are used to compute the pro-rata credit that must be reversed on disposal.