How Much Should You Invest in an IPO Application?

Two large IPOs are open for subscription this week, and the grey market is buzzing about them. Before you decide how much to invest in IPO applications, look at your own numbers first, not the grey market premium (GMP) chatter.

One issue is worth Rs 22,561.57 crore and opens on 17-Sep, closing on 21-Sep. It is entirely an offer for sale of 12.64 crore shares, so the proceeds go to existing shareholders, not the company. GMP signals point to roughly an 11 percent listing gain, though nothing about that number is locked in until shares actually list.

The second is smaller, at Rs 1,000 crore, with a price band of Rs 79 to Rs 84 and an opening date of 16-Sep. GMP signals here suggest a potential listing gain of 27 to 29 percent, and this company plans to use proceeds for debt repayment, capacity expansion and acquisitions. This piece is not about either issue specifically. It is about a question every salaried investor faces every time an IPO opens: how much of my savings should actually go in?

How Much of Your Savings Should Go Into One IPO Application?

A sensible starting rule is to cap any single IPO application at 5 to 10 percent of your liquid net worth, and total IPO exposure across all open issues at 15 percent. Liquid net worth means money sitting in savings accounts, fixed deposits and liquid mutual funds, not your PF balance or the equity you already hold.

If your liquid savings add up to Rs 6 lakh, that caps one application between Rs 30,000 and Rs 60,000. If you earn Rs 12 lakh a year and have built Rs 3 lakh in liquid reserves, the same rule caps you at Rs 15,000 to Rs 30,000 per application. Clearly, the rupee number should scale with what you actually hold in cash, and not to how exciting the IPO looks on financial news.

This cap exists for a reason most retail investors underestimate: allotment in a hot IPO is a lottery, not a guarantee. Oversubscription in the retail category can run into double or triple digits, and most applicants get nothing at all. Sizing your application as if you will definitely get shares is where the real mistake begins.

Why the Grey Market Premium Is Not a Guaranteed Return

GMP is an unofficial estimate of listing-day demand, quoted in an unregulated market before shares trade on the exchange. It moves daily, driven by sentiment as much as fundamentals. A GMP indicating an 11 percent or a 27-29 percent gain is a signal, not a promise.

Treat GMP like a weather forecast. It helps you plan, but you still carry an umbrella because the sky can change. In fact, several IPOs with strong double-digit GMP have opened flat, or below the issue price, once trading began.

What Happens to Your Money While the IPO Application Is Pending?

Your application money isn’t taken out of your account immediately. Under the ASBA process, banks block the amount in your account for the entire bidding window plus a few working days until allotment is finalised, typically 6 to 10 days in total. That money earns no separate return during this period beyond the interest your savings account already pays.

Ten days may sound short, but stack Rs 50,000 across two or three simultaneous applications, and you have parked a meaningful sum. Run the numbers on a fixed deposit calculator to see what that same amount earns in ten guaranteed days instead.

The opportunity cost is small in absolute rupee terms for one IPO. Having said that, investors who chase every mainboard issue that opens end up with locked money almost permanently, and that adds up over a full year.

How Should You Split Your Application Money Across Multiple IPOs?

When two IPOs open in the same week, resist the urge to apply for the maximum retail limit in both. Split your allocated IPO budget, not your entire portfolio, across the issues that fit your risk comfort and holding intent. A trader chasing a quick listing gain and a long-term investor evaluating business quality need very different position sizes.

Liquid net worth	Per-IPO cap (5-10%)	Total IPO cap (15%)
Rs 2 lakh	Rs 10,000 – Rs 20,000	Rs 30,000
Rs 6 lakh	Rs 30,000 – Rs 60,000	Rs 90,000
Rs 12 lakh	Rs 60,000 – Rs 1,20,000	Rs 1,80,000

Notice this total cap is not additive across every issue open that month. If three IPOs open together, you divide the same 15 percent ceiling between them, rather than tripling it.

What Is the Real Cost of Locking Money in an ASBA Application?

Beyond the blocked-funds period, think about what else that money could be doing. Rs 50,000 invested through a monthly SIP over the long term compounds meaningfully, while the same amount sitting in an IPO application queue earns nothing extra even if you get an allotment and sell at a listing gain. Use a lumpsum calculator to compare a one-time equity investment against repeated IPO applications over a year, and the gap becomes obvious.

There is also a tax angle. Gains from selling allotted shares on listing day are short-term capital gains, taxed at your applicable short-term rate, not the lower long-term rate. Indeed, that is one more reason GMP overstates what you actually pocket. If IPO gains recur through your year, fold them into your overall tax planning.

No wonder disciplined investors treat IPO applications as a small, capped side allocation rather than a core strategy. If you want steady, rules-based equity exposure instead of allotment lotteries, a quality-and-momentum approach such as the GEM strategy buys into businesses that have already proven themselves in the market, rather than betting on day-one sentiment.

How Do You Decide When Not to Apply at All?

Skip the application if it pushes your blocked funds above the 15 percent ceiling, or if you need that money within a month for a known expense.

Of course, an OFS-heavy issue, where existing shareholders cash out rather than the company raising fresh capital, deserves a more cautious read than one funding expansion or debt repayment.

Frequently Asked Questions on IPO Application Sizing

Is it safe to apply for the maximum retail limit in an IPO?
Not automatically. The maximum retail limit is set by SEBI rules for the category, not by your personal finances. Size your application to your liquid net worth cap, even if that is below the maximum allowed.

Does a high GMP mean the IPO will definitely list at a profit?
No. GMP is an informal, unregulated indicator that can swing sharply in the days before listing. A high GMP raises the odds of a strong listing but guarantees nothing.

How long is my money blocked when I apply through ASBA?
Typically 6 to 10 working days, spanning the bidding window and the allotment process, until unblocked funds are released back for non-allottees.

Should I borrow money to apply for an IPO with a high GMP?
No. Borrowed money carries interest cost whether or not you get allotted shares, and allotment itself is uncertain. Apply only with surplus liquid savings.

What should I do if I do not get an allotment?
Nothing dramatic. Funds are unblocked automatically within a few working days, and that same amount can go into a planned SIP or a fixed deposit instead.

What Should You Do This Week?

To sum up, work out your liquid net worth first, apply the 5 to 10 percent single-issue cap and the 15 percent total cap, and remember that GMP is a mood indicator, not a return guarantee. Whichever of this week’s issues interests you, size the application to your own balance sheet, not to the excitement in the grey market.