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Summary: A complete guide to how the RBI’s Liquidity Adjustment Facility works, covering the LAF corridor, SDF, MSF, repo and reverse repo operations, and what it means for India’s monetary policy today.
Every time the RBI tweaks the repo rate, whether it’s a cut or a hold, the headlines inevitably zoom in on the number: __ basis points here, a pause there. But what’s really going on behind that single number? The central bank has this entire system, the Liquidity Adjustment Facility (or LAF for short), that it uses to manage the flow of money through India’s banking system on a daily basis. To truly grasp how monetary policy works, from the RBI’s policy room to your bank’s lending desk and ultimately, to the economy, you need to understand the LAF: its inner workings, the tools it uses, and the recent changes it’s undergone.
The LAF was introduced in 2000, after the Narasimham Committee on Banking Sector Reforms (1998) recommended it, and its main purpose is to help scheduled commercial banks manage their overnight liquidity needs. Fast forward to the past two decades, and the LAF has undergone some significant changes, the most notable one being the structural shift in April 2022 [1], which completely changed its floor mechanism.
What the LAF Does and Why It Exists
Think of the banking system as a giant pool of money. On any given day, some banks have more than they need (surplus liquidity), and some are running short (deficit liquidity). The LAF is the mechanism through which the RBI either lends money to banks facing a shortfall or absorbs excess money parked by banks sitting on surpluses.
It’s not just about keeping things running smoothly, though; the RBI’s got a bigger goal in mind. The RBI’s primary operating target for monetary policy is the Weighted Average Call Rate (WACR). It’s the rate at which banks lend to each other overnight. The LAF corridor is designed to keep this rate, the overnight interbank rate, pretty close to the policy repo rate. Every single tool in the LAF toolbox is geared towards keeping that one rate anchored.
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The LAF Corridor: Ceiling, Floor, and What Sits Between Them
The LAF corridor is the range within which short-term market rates are expected to fluctuate. It has three reference points: a floor, a midpoint, and a ceiling.
As of June 2026, the LAF corridor spans 50 basis points. The Standing Deposit Facility (SDF) rate, currently at 5.00%, acts as the floor; the policy repo rate, sitting at 5.25%, is the midpoint; and the Marginal Standing Facility (MSF) rate, at 5.50%, forms the ceiling. Since the February 2026 rate decision, this corridor has remained symmetric.
Here’s the logic: If overnight market rates start to dip below the SDF rate, banks will just opt to park their excess funds with the RBI at that rate instead of lending at a lower rate in the interbank market, acting as a natural floor on rates. On the other hand, if overnight rates start to rise above the MSF rate, banks will likely borrow directly from the RBI at that rate rather than pay more in the market. And that’s how you get a hard ceiling.
| Rate | Level (June 2026) | Role |
| MSF Rate | 5.50% | Ceiling of the LAF corridor |
| Policy Repo Rate | 5.25% | Midpoint/policy signal |
| SDF Rate | 5.00% | Floor of the LAF corridor |
| Fixed Reverse Repo Rate | 3.35% | Inactive; no longer the operative floor |
Source: RBI MPC Resolution, June 5, 2026
Every time the MPC changes the repo rate, the MSF rate (Repo + 25 bps) and SDF rate (Repo − 25 bps) adjust automatically, maintaining the symmetry of the LAF corridor.
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Repo and Reverse Repo Operations: The Classic Instruments of the LAF
The LAF’s foundation is built on two key instruments: the repo and its counterpart, the reverse repo.
Repo, or Repurchase Agreement, is when banks are looking for short-term funds, and they turn to the RBI, offering up eligible government securities as collateral, with a promise to repurchase them the very next day at a slightly inflated price, the difference being the repo rate, which essentially pumps liquidity into the system. Importantly, banks can’t use securities that are already locked away in their mandatory SLR quota for standard repo operations; those are set aside for a different purpose altogether.
On the other hand, you have the Reverse Repo, which acts as the RBI’s way of soaking up excess liquidity from banks by temporarily selling them securities, borrowing their cash, and agreeing to buy them back. In return, banks earn the reverse repo rate for lending their surplus funds to the RBI.
In reality, the RBI doesn’t always stick to fixed rates when using these instruments. It has got Variable Rate Repo auctions, which typically have maturities ranging from 1 to 14 days, allowing banks to competitively bid for funds, with the cut-off rate being determined by the market rather than being fixed administratively. And, of course, there’s the equivalent on the absorption side: the Variable Rate Reverse Repo. As part of the RBI’s revised liquidity management framework, announced back in September 2025, it decided to discontinue the 14-day VRR/VRRR as its primary operation, opting instead to focus on 7-day operations for a bit more agility.
SDF (Standing Deposit Facility): The New Floor of the LAF Corridor
This change to the LAF is huge and is often overlooked.
Before April 2022, the fixed reverse repo rate was the floor of the LAF corridor, which had its drawbacks. If the RBI wanted to soak up excess liquidity, it had to offer government securities as collateral to banks, but what if it ran out of eligible securities to pledge? This created a real headache during periods of extreme liquidity surplus.
Then, in April 2022, the SDF came along, replacing the fixed reverse repo as the floor of the LAF corridor. The key difference: The SDF doesn’t require banks to put up collateral when they park their funds with the RBI. It’s available every day of the year, after market hours, making it a super flexible tool for absorbing liquidity.
The SDF also helps with financial stability. By ditching the “collateral constraint,” the central bank can absorb surplus capital without worrying about running out of government securities, like during the post-demonetization phase in 2016.
The fixed reverse repo rate is still around, but it’s pretty much inactive now. Take note: the SDF rate is the one to watch for short-term rate dynamics, not the fixed reverse repo rate.
MSF (Marginal Standing Facility): The Ceiling of the LAF Corridor
If the SDF is like the floor, then the Marginal Standing Facility is basically the ceiling, serving as a legitimate safety net for banks that are really struggling.
The MSF was rolled out back in May 2011 to get a handle on liquidity and keep overnight interest rates from fluctuating. It serves as an emergency loan option for scheduled commercial banks when they’re dealing with a liquidity crisis and can’t get what they need from other banks. What sets it apart from the standard repo window is the collateral: banks can borrow through the MSF by dipping into their SLR portfolio, up to a certain point (2% of NDTL), which is beneficial because they can use securities that would normally be tied up in regulatory requirements.
Banks can access the MSF on all working days (except Saturdays) between 5:30 pm and 7:30 pm, after they’ve wrapped up their day-to-day operations. The minimum borrowing amount is ₹1 crore, with ₹1 crore increments thereafter.
The MSF rate, which is 25 bps above the repo rate, acts as a hard ceiling for overnight market rates. No bank in their right mind would pay more in the interbank market when they can just borrow from the RBI through the MSF window at a better rate.
How the LAF Translates Into Real-World Impact
The LAF is so much more than just the central bank’s plumbing system, having real, direct consequences for borrowers, investors, and businesses.
- Loan pricing: When the repo rate takes a dive, banks’ marginal cost of funds drops too, and that eventually trickles down to MCLR and repo-linked lending rates (RLLR). So, in response to the cumulative 100 bps repo rate cut cycle (back in 2025), scheduled commercial banks ended up lowering their 1-year median MCLR by 60 bps, and weighted average lending rates on fresh loans fell by 95 bps.
- Bond yields: LAF operations have a direct influence on short-term money market rates, which, in turn, kind of set the tone for longer-duration G-Sec and SDL yields.
- Banking system profitability: When the RBI is in absorption mode, using SDF/VRRR, banks actually earn the SDF rate on their surplus funds. But when it is in injection mode, banks have to pay the repo rate to borrow, and that can squeeze their NIMs if lending rates haven’t adjusted yet.
- Monetary policy transmission: If the WACR stays close to the repo rate, that’s a good sign that transmission’s working as it should. But if there’s a wide, persistent gap between the two, that’s a signal that the LAF’s under stress, either from structural liquidity surpluses or a credit crunch, which isn’t ideal.
Frequently Asked Questions
They’re both used to absorb liquidity, but the SDF doesn’t require the RBI to put up collateral for banks, which makes it way more flexible. And the reverse repo rate is pretty much inactive now; it’s not the benchmark it used to be. The SDF rate is what really matters when trying to figure out where overnight rates are headed.
No. The LAF is an interbank facility: Only scheduled commercial banks and select financial institutions with current and SGL (Subsidiary General Ledger) accounts with the RBI are eligible. The impact on retail borrowers is indirect, through lending and deposit rate transmission.
Normally, that portfolio is set aside as a safety net, but in a real emergency, the MSF permits its use to get some overnight liquidity, with an assurance of a payback of those securities the next day.
Repo and SDF operations happen every day, like clockwork. It also holds variable-rate auctions, either weekly or as needed. The MSF tends to get used more during stress events or when there’s a liquidity crunch.
The Weighted Average Call Rate is the rate at which banks lend to each other overnight, basically the interbank market rate. The RBI aims to keep the WACR close to the repo rate, which is the main goal of the entire LAF framework.
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