An occasional sale of a personally owned car by an individual outside business is ordinarily not a taxable business supply. A registered dealer or business can have GST liability. For qualifying old and used motor vehicles where input tax credit was not availed, Notification 8/2018 provides concessional valuation/rate treatment and tax is effectively charged on the positive margin; a negative margin is ignored.
Start with the law effective on the transaction date
This article was checked against official GST material available on 2026-07-29. Rates, exemptions, thresholds and portal steps can change. Match the exact supply, HSN/SAC, parties, state, place of supply and effective date to the implementing notification.
Do not file from a secondary headline alone. Keep the notification, classification working, invoices and reconciliations supporting the treatment.
When GST applies
First identify the seller. A one-off disposal by a private owner is different from a dealer’s inventory sale or a registered business disposing of a business asset. Family relationship alone is not a blanket exemption; the real question is whether the transaction is a supply in the course or furtherance of business and whether Schedule I applies.
Margin scheme conditions
For qualifying old and used vehicles, the notified margin is generally selling price minus purchase price. Where depreciation under section 32 of the Income-tax Act was claimed, margin is generally selling price minus depreciated value. The notification excludes cases where input tax credit was availed.
Rate and cess
The 2018 notification used a concessional combined GST treatment for covered vehicles and exempted compensation cess. Because the September 2025 rate rationalisation changed several vehicle entries, sellers should match the exact vehicle and transaction date to the current notification rather than copy an old 18% headline.
Worked calculation
If a qualifying dealer bought a car for ₹8,00,000 and sells it for ₹10,00,000, the statutory margin is ₹2,00,000. Apply the verified current rate to ₹2,00,000. If sold for ₹7,50,000, the negative margin is ignored; it does not create a refund or offset against another vehicle.
Invoice and records
Keep purchase agreement, seller identity, RC, payment trail, refurbishment invoices, prior ITC evidence, depreciation schedule and sale invoice. The invoice should identify the vehicle and disclose tax consistently with the chosen valuation method.
Mistakes to avoid
Do not call every family transfer exempt, apply margin valuation after taking vehicle ITC, pool profits and losses across cars, or confuse RC-transfer compliance with GST. Dealers should separately check TCS, e-way bill and state motor-vehicle documentation.
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Request GST supportFrequently asked questions
Does an individual pay GST when selling a family car?
Ordinarily no where it is a personal, non-business disposal.
Is GST always 18% on used cars?
Do not assume so; verify the current notified rate for the vehicle and date.
Can a loss-making car sale create negative GST?
No. A negative margin is ignored under the qualifying scheme.
What if ITC was claimed?
The concessional used-vehicle notification may not apply; obtain transaction-specific advice.
Are family sales automatically exempt?
No blanket family exemption exists; analyse whether there is a taxable business supply.
Is RC transfer enough?
No. RC transfer, income-tax records and GST documentation are separate matters.
