On 11 December 2025, Sportstar published a walk-through of the rule book that governs injury replacements after the IPL auction, and the rules it set out have become the reference for how franchises navigate a season-ending absence. The headline is short: a franchise can sign an injury replacement after the auction only when the replaced player has been officially ruled out for the season by a BCCI-approved medical team. The medical ruling must be made before the franchise plays its 12th league match, and once a player has been replaced, that player cannot return to the same franchise in the same season.
The rule book is not a one-page document. It is built around the auction itself, the Registered Available Player Pool that runs alongside it, the salary cap, and the squad-size and overseas-player limits that every franchise has to clear. What the December 2025 explainer clarified, line by line, is how those moving parts fit together when a franchise loses a player in the first half of the league stage. It is the cleanest public summary of the framework that has been in force since the 2023 cycle, and it is the document teams' medical and administrative staff work against when they file a replacement request.
What the rule book actually says
The replacement framework is built around three conditions. The first is the medical ruling. The replaced player must be ruled out for the remainder of the season by a BCCI-approved medical team, and the medical certificate sits at the centre of the franchise's replacement request. The second is the timing. The medical ruling must come before the franchise plays its 12th league match; after that window, the franchise cannot sign a replacement under the injury-replacement rule, regardless of how serious the injury is. The third is the pool. The replacement has to come from the Registered Available Player Pool, which is the same pool that includes players who entered the auction but went unsold.
The two parts of the rule that the franchises work against most often are the BCCI medical approval and the 12-match window. The medical approval is what turns a private assessment into a league-recognised ruling; without a BCCI-approved medical ruling, even a player with a confirmed ACL tear cannot be replaced under the framework. The 12-match window, in practice, runs roughly to the middle of the league stage, because most IPL seasons play 14 league matches per franchise in the home-and-away structure that has been in place since 2022. The window exists, in effect, to prevent a franchise from leaning on the replacement rule to reset its squad during the back half of the season.
Where the replacement comes from
The replacement must come from the Registered Available Player Pool. That pool is not a back-channel list that franchises build themselves. It is the league-managed pool of players who entered the auction but went unsold, plus any additions that the BCCI clears through its registration process during the season. When a franchise needs a replacement, it nominates a player from the pool, the BCCI confirms the player's registration, and the contract is signed at the same value or below the contract of the player being replaced.
The contract cap is the most important practical constraint. A replacement cannot be paid more than the outgoing player's contract. If a franchise lost a player bought at INR 8 crore in the auction, the replacement's contract has to sit at INR 8 crore or below. That rule by itself does a lot of the equity work inside the framework: it prevents an injury from becoming a financial workaround to upgrade a slot, and it keeps the replacement market in the same pricing band as the auction that just finished.
The pool itself is structured so that the marginal names from the auction are the first port of call. Marquee players who went unsold are rare in any IPL auction, but they do appear — think of the franchises that build the long tail of the squad out of allrounders and bowlers who did not find a buyer in the main auction. Those players are exactly the cohort the replacement rule was designed to absorb, and the rule book treats the pool as the natural reservoir for the role.
How the salary cap, squad size and overseas limits interact
A replacement signing does not change the franchise's salary cap. The cap is set at the start of the season and is calculated against the original squad, and the replacement's contract is treated as a continuation of the existing cap rather than an addition. That is the second crucial piece of the framework: the replacement is, in cap terms, an in-place swap, not a new budget line.
What the signing does have to satisfy is the squad-size and overseas-player limits. The squad-size cap stands at 25 players in the current cycle, and the overseas-player limit at eight. A replacement signings pushes the franchise back inside the size and overseas ratios, and a franchise that has already used all of its overseas slots cannot bring in an overseas replacement unless it releases an overseas player. The cap does not move, but the structural limits do, and that is where most of the actual negotiation happens inside franchise back offices.
The practical impact is that the replacement signings cluster in the early part of the window, when the franchise has the most flexibility. A franchise that picked up its full eight overseas players at the auction can only swap one overseas for another overseas, and the swap is constrained by the contract cap. A franchise that has cap room but is full on squad size has to release a player to make room. The framework is permissive on the headline question and tightly constrained on the operational details.
The international-duty carve-out that came before
The December 2025 explainer also set out the parallel rule that the previous season had run for international-duty absences. Players who left mid-season for an ICC event or a bilateral international commitment were, in the most recent cycle, temporarily replaced by a franchise, and the temporary replacement ran for the duration of the original player's international duty. The framework specified that the temporary replacement could not be retained by the franchise once the original player returned. The temporary replacement went back into the Registered Available Player Pool and had to enter the next auction again to be picked up.
That carve-out is a different mechanism from the season-ending injury replacement. It runs on a different timetable, it does not require a BCCI medical ruling, and it explicitly does not roll over into the next season. The league's reason for treating the two as separate streams is the difference in the player's status: an injured player is, by definition, gone for the season, while a player on international duty is, by definition, coming back. The rule book keeps the two flows separate because the consequences for the squad are different, and the safeguard against retention is the simplest part of the temporary-replacement framework.
What the franchise paperwork looks like
Behind the rules, the operational pitch is narrow. A franchise that wants to sign an injury replacement files a written request with the BCCI, attaches the BCCI-approved medical ruling, identifies the player from the Registered Available Player Pool that it intends to sign, and confirms the contract value against the outgoing player's contract. The BCCI's operations team then confirms the registration, the contract is signed, and the replacement is added to the squad.
The documentation is the same framework that the BCCI has used to register every other squad signing under the auction, and the league's compliance team treats the medical ruling as the load-bearing part of the file. A replacement signed without a BCCI-approved medical ruling lapses as soon as the BCCI reviews the file; the framework does not allow a franchise to file a replacement on the basis of a club doctor's note alone. The BCCI medical board is the gatekeeper, and the timing rule — before the 12th league match — is the second gatekeeper.
Why the 12-match window matters in practice
The 12-match window is the most underappreciated part of the rule book. The standard IPL league stage runs 14 matches per franchise under the home-and-away structure, which means the replacement window closes roughly two matches before the end of the league stage. The window is engineered to give the franchise room to integrate the replacement into the XI before the back end of the season, and to ensure that the replacement has enough cricket in the league to be a real input to the playoff push rather than a name on the squad sheet.
For the 2026 cycle, the practical implication is that any franchise with a serious injury to a first-XI player has to make the replacement call inside the first 11 matches. That timeline has been visible in the way franchises have used the rule in past cycles: the replacement signings cluster in the first half of the league stage, and franchises that lose a player in the back half of the league stage typically run with their existing squad rather than burn the framework.
What this means for the next injury call
The next time a franchise loses a player to a season-ending diagnosis, the path is clear. The medical team files the BCCI-approved medical ruling, the franchise identifies a replacement from the Registered Available Player Pool, the contract sits at or below the outgoing player's contract, and the request is filed before the 12th league match. The replacement cannot be retained if the original player is, against the medical ruling, fit to return mid-season: the rule book treats the medical ruling as final for the cycle.
For fantasy players and editorial coverage, the points to watch are the franchise's outstanding overseas count, the remaining cap room, and the strength of the Registered Available Player Pool at the relevant role. The replacement will not be a marquee name — the auction has already cleared the marquee pool — but the replacement can still be a meaningful fantasy upgrade when the right role is open. The IPL injury-replacement framework is, in that sense, an extension of the auction rather than a parallel system, and the rule book is designed to keep it that way. The complete IPL teams dossier, with the squad that each franchise has signed for the 2026 cycle, is the natural next stop for readers who want to see the framework in action: all ten IPL franchises, with squad depth, form and fixtures.