small finance bank guide: RBI licensing, PSL & SFB exam prep
A small finance bank is a specialised, RBI-licensed differentiated bank created to deepen financial inclusion by serving the unserved and underserved sections of the economy. For candidates preparing for the IIBF Small Finance Bank (SFB) certificate exam, understanding the small finance bank framework — its RBI licensing guidelines, target segment, priority sector obligations, branch norms and capital requirements — is the single most scoring area. This guide walks through every concept you need, mapped to the way the SFB exam actually tests it, so you can revise the regulatory architecture with confidence and avoid the traps that commonly cost marks.
What Is a Small Finance Bank and Why RBI Created It
A small finance bank is a niche bank set up under the RBI's 2014 guidelines (revised by the on-tap licensing framework of 2019) with the explicit objective of taking basic banking services — deposits and credit — to segments the formal system has historically missed. The defined target segment includes small and marginal farmers, micro and small enterprises, the unorganised sector, low-income households and migrant labour. Unlike a payments bank, a small finance bank can both accept deposits and lend, which makes it a full-service bank for its niche.
The legal foundation rests on the Banking Regulation Act, 1949 and the RBI Act, 1934, and licensing flows from Section 22 of the Banking Regulation Act. The regulator's intent was to promote financial inclusion through entities with deep last-mile reach, often built on the rails of existing microfinance institutions (MFIs), NBFCs and local area banks. For the exam, remember the headline: a small finance bank exists to serve the unserved and underserved, and every operating rule — PSL, branch location, ticket size — flows from that mandate. You can drill these definitions further on our CAIIB course material, which covers differentiated banking in depth.
RBI Licensing Guidelines and Eligibility
The RBI licensing guidelines for a small finance bank set clear eligibility and structural conditions. Eligible promoters include resident individuals and professionals with at least 10 years of banking and finance experience, plus existing NBFCs, microfinance institutions and local area banks that are owned and controlled by residents. The promoter must demonstrate a sound track record and fit-and-proper credentials, assessed by an RBI Standing External Advisory Committee.
- Minimum paid-up capital: The net worth requirement is Rs 200 crore (raised from the earlier Rs 100 crore under the 2019 on-tap framework; urban co-operative banks transitioning to SFBs have a phased Rs 100 crore initial floor rising to Rs 200 crore).
- Promoter holding: A minimum of 40% of paid-up equity capital initially, to be locked in for five years, then progressively diluted to 15% within 15 years.
- Foreign shareholding: Governed by the FDI policy for private sector banks.
- Prudential norms: A small finance bank must maintain a minimum capital adequacy ratio (CRAR) of 15% of risk-weighted assets, comply with CRR and SLR, and is subject to the full prudential and inspection regime applicable to commercial banks.
A crucial transition rule: a small finance bank is required to list on the stock exchanges within three years of reaching a net worth of Rs 500 crore. These numbers are favourite exam targets, so memorise them precisely. Test yourself on capital and licensing questions using our SFB mock tests before moving on. The authoritative source is the regulator itself — see the RBI guidelines on small finance banks for the exact circular language.
The 75% PSL and 25% Unbanked-Rural Branch Mandates
Two operating conditions define a small finance bank more than anything else, and the SFB exam returns to them repeatedly. First, the priority sector lending (PSL) requirement: a small finance bank must extend at least 75% of its Adjusted Net Bank Credit (ANBC) to the priority sector, against the 40% required of universal commercial banks. This high floor forces the bank to keep its lending squarely within the inclusion mandate.
Second, the small ticket focus: at least 50% of the bank's loan portfolio must consist of loans and advances of up to Rs 25 lakh. This ensures the credit reaches micro and small borrowers rather than large corporates. Third, the branch rule — a small finance bank must open at least 25% of its branches in unbanked rural centres (population up to 9,999 as per the latest census), reinforcing physical last-mile reach.
There are no restrictions on the area of operations; a small finance bank can operate pan-India from day one. It can also undertake non-risk-sharing financial services such as distribution of mutual funds, insurance and pension products with prior approval, and may become an authorised dealer in forex. For revision, lock in the trio — 75% PSL, 50% sub-Rs-25-lakh loans, 25% unbanked-rural branches — as a single mnemonic block. You can reinforce these thresholds through quick drills on our match-the-norm game, which pairs each rule with its exact percentage.
MFI-to-SFB Transition, CASA Building and Strategic Challenges
A large share of today's small finance banks began life as microfinance institutions. The MFI-to-SFB transition is a recurring exam theme because it captures the strategic tension at the heart of the model. As an MFI, the entity relied almost entirely on borrowed funds and lent through the joint-liability group model. On becoming a small finance bank, it gains the ability to mobilise public deposits — a cheaper, more stable funding base — but must simultaneously build branch infrastructure, technology, treasury and compliance capabilities it never previously needed.
The biggest post-conversion challenge is CASA building. CASA (Current Account and Savings Account) deposits are low-cost funds, and a healthy CASA ratio lowers the cost of funds and protects the net interest margin. A newly converted small finance bank typically starts with a near-zero CASA base and must aggressively raise its share by offering competitive savings rates, digital onboarding and granular outreach. Other transition challenges include managing concentration risk in microfinance, diversifying the asset book beyond group loans, meeting CRR/SLR for the first time, and absorbing the higher compliance cost of being a scheduled bank.
For the exam, connect the dots: the same inclusion mandate that drives the 75% PSL rule also explains why deposit mobilisation and CASA building are hard but essential. A candidate who can explain why each norm exists — not just the number — scores in the application-based questions. Deepen this with the financial-inclusion modules in our JAIIB course and keep current with regulatory updates via IIBF news and the RBI rates tracker.
Frequently Asked Questions
What is a small finance bank in simple terms?
A small finance bank is an RBI-licensed differentiated bank that accepts deposits and lends, with the specific mandate of serving the unserved and underserved — small farmers, micro and small enterprises, low-income households and the unorganised sector. Unlike a payments bank, it can give loans, making it a full-service bank for its niche segment.
What are the key RBI norms for a small finance bank?
The core norms are: minimum net worth of Rs 200 crore, CRAR of 15%, at least 75% of Adjusted Net Bank Credit to the priority sector, a minimum 50% of the loan book in loans up to Rs 25 lakh, and at least 25% of branches in unbanked rural centres. Promoter holding starts at 40% and dilutes to 15% over 15 years.
Why is the PSL requirement 75% for a small finance bank?
The 75% priority sector lending floor — nearly double the 40% required of universal banks — exists to ensure the small finance bank stays focused on financial inclusion. It compels credit to flow to small and marginal borrowers in agriculture, MSME and weaker sections rather than to large corporates, keeping the bank aligned with its licensing objective.
How does an MFI become a small finance bank?
An eligible microfinance institution applies under the RBI on-tap licensing framework, meets the Rs 200 crore net worth and fit-and-proper criteria, and converts. Post-conversion it must build a deposit franchise (especially low-cost CASA), set up branches with 25% in unbanked rural areas, meet CRR/SLR, and comply with full prudential and inspection norms as a scheduled bank.
The small finance bank framework rewards candidates who memorise the exact thresholds and understand the inclusion logic behind them. Revise the licensing capital, the 75% PSL rule, the 25% rural-branch mandate and the CASA-building challenge together, then prove your readiness under timed conditions. Put it all to the test with our IIBF SFB practice tests — they mirror the real exam pattern and flag exactly which norms you still need to drill before exam day.
Take a free mock test, download chapter PDFs, or watch a video class — all included on iibf.store.
