When two people make equal bids for the same number of shares in the same sale, one gets an allocation and the other receives a return. Nothing personal decides that outcome — it comes down to a fairly mechanical process running quietly behind the scenes.
The Basic Math Behind Every Allocation
Picture a company offering 7,00,000 shares with a lot size of 70 shares each. Simple division shows that only 10,000 investors can receive at least one lot, no matter how much total demand shows up. That single number — shares divided by lot size — sets a hard ceiling on how many people can walk away with shares, regardless of how many actually applied.
When Supply Actually Matches Demand
Sometimes the total number of bids comes in at or below the number of available shares. When that happens, every valid applicant simply receives what they asked for, since there’s no scarcity to manage. This is relatively rare for popular listings, but it does happen, particularly with less closely watched issues.
Two Very Different Outcomes When Demand Outpaces Supply
Once demand exceeds supply, the far more common situation, the registrar chooses between two approaches depending on severity. Every application gets the basic lot in a minor oversubscription, and any leftover shares are split equally among those who make higher bids. A chance draw determines who gets shares at all in cases of substantial oversubscription, thus an otherwise valid application may nevertheless receive nothing.
Who Actually Runs This Process
| Registrar | Track Record |
|---|---|
| KFin Technologies | Handled over 225 IPOs and counting |
| Bigshare Services | Managed 300+ IPOs to date |
| MUFG Intime (Link Intime) | A leading name in mainline IPO allotment |
| Cameo Corporate Services | Specialises in registrar and transfer agent work |
These firms verify applications, run the lottery or proportional allocation, and publish results on their own websites once the process concludes.
Why Two Identical Bids Can End Up Differently
Results can differ for non-lucky reasons even when two candidates bid for the same amount of shares. An incorrect PAN, mismatched Demat details, or an invalid application gets rejected before the lottery even runs, regardless of how favourable the odds looked otherwise. Getting the basics right matters just as much as understanding how IPO allotment mechanics work in the first place.
A Practical Playbook For Better Odds
A few habits genuinely improve the odds of a favourable IPO allotment outcome:
- Spread bids across multiple smaller applications instead of one large one, since SEBI treats retail applications equally up to ₹2,00,000
- Apply through separate Demat accounts held by family members, since each entry counts independently
- Keep accounts open with more than one broker to widen access across different issues
- Stay consistent — applying regularly across several offerings improves familiarity and, over time, overall odds
Watching What Comes Next
Getting better at this comes partly from staying engaged with the broader IPO calendar rather than reacting to just one issue at a time. Checking a running list of upcoming IPO options on a platform like AngelOne makes it easier to plan applications well ahead of each subscription window. Comparing lot sizes and expected demand across the upcoming IPO pipeline also helps set realistic expectations before applying.
Setting Realistic Expectations
IPO allotment will always involve some element of chance once an issue gets oversubscribed, but understanding the mechanics behind it turns a confusing outcome into something explainable. Watching the upcoming IPO pipeline and applying thoughtfully remains the most practical way to improve the odds over time.
