Home › Calculators › Kostak vs GMP Calculator

Kostak vs GMP Calculator

Compare the grey-market kostak price with the per-share GMP to see which IPO application resale deal gives you the higher profit.

Calculator

Results update instantly — all calculations run privately in your browser. Nothing is sent to any server.

How this calculator works

Kostak profit = the flat kostak price quoted for the whole applicationGMP profit = GMP per share × lot sizeThe calculator shows which is higher and by how much

More IPO calculators

IPO GMP Listing Gain CalculatorIPO Break-Even Price CalculatorIPO Brokerage & STT Calculator (Net Profit)IPO Profit Tax Calculator — STCG & LTCGIPO Lot Size & Investment CalculatorMulti-PAN IPO Lot Optimizer

FAQs

What is kostak in IPO?

Kostak is the grey-market price for selling your entire IPO application (one lot) before listing, regardless of per-share GMP.

Which is better, kostak or GMP?

It depends on lot size and the quoted kostak. This calculator compares both so you can pick the higher payout.

Disclaimer
Disclaimer: DostIpo is not a SEBI-registered investment adviser or research analyst. All data here is for information only, not investment advice or a recommendation to invest. GMP is an unofficial estimate. Market investments are subject to risks; read the RHP and consult a SEBI-registered adviser before investing.

Last updated: 29 Aug 2026, 22:13 IST