AI Overview
What is the Kostak rate? Kostak rate is the fixed price paid for an entire IPO application in the grey market, regardless of whether the seller receives allotment. The buyer pays the Kostak amount upfront and takes on all allotment and listing risk. The seller locks in a small guaranteed profit. Kostak is part of India’s unregulated grey market it operates outside SEBI’s framework with no legal enforcement. It is not the same as GMP (which is per share) or Subject to Sauda (which requires allotment).
Introduction: What Happens When You Sell Your IPO Application?
Most IPO investors apply and then wait for allotment results. But in India’s informal grey market, some investors sell their IPO applications before allotment is announced locking in a fixed profit regardless of whether they receive shares.
The price at which they sell their application is called the Kostak rate.
Understanding Kostak helps you make an informed decision about whether it makes sense to participate in grey market transactions and what the risks are.
What is Kostak Rate? The Clear Definition
Kostak rate is the fixed amount a grey market buyer pays for an IPO applicant’s entire application, regardless of allotment outcome.
The word “Kostak” is believed to derive from the Gujarati trading community vocabulary it has been used in Indian grey market circles for decades.
When you sell your application at the Kostak rate:
- You receive the agreed Kostak amount in cash
- You hand over the “right” to your application to the buyer
- If you receive allotment, you transfer the shares to the buyer
- If you do not receive allotment, the deal is over you keep the Kostak, the buyer loses what they paid
The critical point: Kostak is paid regardless of allotment. This is what distinguishes it from Subject to Sauda.
Kostak Rate Example
Scenario:
- IPO: XYZ Ltd, Price band ₹150 to ₹180, Lot size 75 shares
- Minimum investment: 75 × ₹180 = ₹13,500 per lot
- Kostak rate: ₹1,200 per application (for 1 lot at retail)
- GMP on the same day: ₹60 per share (expected listing at ₹240)
What happens:
You apply for 1 lot (₹13,500 blocked in your account). A grey market buyer agrees to pay you ₹1,200 for your application.
Scenario A You receive allotment:
- Shares credited to your demat: 75 shares
- You transfer 75 shares to the buyer
- Buyer pays: ₹1,200 (Kostak) + ₹13,500 (reimburses your blocked amount)
- You net: ₹1,200 profit
- Buyer nets: (75 × ₹240 listing price) – ₹13,500 (cost) – ₹1,200 (Kostak) = ₹75 × ₹60 – ₹1,200 = ₹4,500 – ₹1,200 = ₹3,300 profit (if listing is at GMP)
Scenario B No allotment:
- Nothing happens with shares
- The ₹13,500 ASBA block is released to your account
- You keep the ₹1,200 Kostak payment
- Buyer loses ₹1,200
Kostak vs GMP vs Subject to Sauda: The Key Differences
| Feature | GMP | Kostak | Subject to Sauda (STS) |
| What is it? | Per-share price premium | Fixed price per application | Conditional price per allotted lot |
| Allotment required? | Yes (for share delivery) | No | Yes |
| Risk to seller | None (once deal closes) | None | None (no allotment = deal cancelled) |
| Risk to buyer | Listing performance | Allotment + listing | Listing performance only |
| Expressed as | ₹ per share | ₹ per application | ₹ per lot |
| Timing | Pre/post subscription | Post subscription | Post subscription |
Why Kostak is lower than STS: Kostak includes allotment risk the buyer may pay you and then not receive any shares. STS only activates on allotment, so the buyer avoids allotment risk. This means the STS rate for the same IPO is always higher than the Kostak rate.
Who Uses Kostak Transactions?
Sellers (applicants):
- Investors who want guaranteed small profit rather than uncertain listing gain
- Applicants with low confidence in the IPO’s listing performance
- Investors who need their capital freed up quickly for the next IPO
Buyers:
- Grey market operators and traders who believe the IPO will list at a strong premium
- HNI investors who want exposure to more application entries than they can personally submit
- Operators building positions across multiple applications for large-scale grey market activity
Is Kostak Trading Legal in India?
This is the most important question and the honest answer is nuanced.
The grey market itself operates entirely outside SEBI’s regulatory framework. SEBI does not regulate, endorse, or prohibit grey market activity explicitly. The Income Tax Act and other financial laws do not specifically address Kostak transactions.
The practical legal reality:
- Tracking and monitoring Kostak rates as information is completely fine
- Participating in Kostak transactions is legally murky grey market dealings are informal, unregulated, and carry zero legal protection
- There is no recourse if a counterparty defaults no court will enforce a Kostak agreement
- Income earned through Kostak transactions is taxable as income in India and should be declared
Our position at iposhareprice.com: We report Kostak rates as market intelligence and educational information only. We do not facilitate, encourage, or participate in grey market trading of any kind.
Risks of Participating in Kostak Transactions
- Counterparty risk: If the buyer refuses to pay after allotment, there is no legal recourse. The entire transaction is based on personal trust.
- Tax implications: Kostak income is taxable. Undisclosed grey market income can attract IT scrutiny.
- Reputation risk: Participating in grey market dealings outside regulated channels can attract attention from market regulators in ongoing enforcement campaigns.
- Application rejection risk: If your application is rejected after entering a Kostak deal, complications arise with the buyer who expected a valid application.
Frequently Asked Questions
What is the typical Kostak rate range?
Kostak rates vary widely by IPO quality, GMP, and subscription expectations. For a high-demand Mainboard IPO with ₹50–₹80 GMP, Kostak rates might range from ₹500 to ₹3,000 per retail application. For SME IPOs with very high GMP, Kostak can be significantly higher.
Is Kostak the same as GMP?
No. GMP is the per-share premium in the grey market. Kostak is the fixed price for an entire application regardless of allotment. They are related but different concepts.
Can I participate in Kostak without a demat account?
Theoretically yes, since Kostak for “no allotment” scenarios does not require shares. But practically, you need a demat account to apply for an IPO in the first place.
Where are Kostak rates quoted?
On grey market intelligence websites including InvestorGain and IPOWatch, which report Kostak along with GMP data. Also on our IPO GMP Today page.
Summary
- Kostak rate = fixed payment per IPO application, regardless of whether allotment happens
- The seller gets guaranteed small profit; the buyer takes allotment and listing risk
- Kostak is always lower than Subject to Sauda (which requires allotment)
- Grey market transactions including Kostak are unregulated with no legal protection
- Kostak income is taxable; participation carries counterparty and legal risks
