Startup Deep Dive : ESAF Small Finance Bank — how a Kerala microfinance lender swung from profit to a Rs 521 crore loss in one year

In FY24, ESAF Small Finance Bank earned a profit of ₹426 crore; one year later it reported a loss of ₹521 crore. The same lender that raised ₹463 crore in a November 2023 IPO, and once ran net interest margins near 10%, watched its microfinance book turn on it inside a single financial year.

ESAF is the story of a Kerala NGO that grew into a listed bank on the back of tiny, unsecured loans to rural women, and then discovered that the very concentration which powered its rise could reverse just as fast. Its recovery, still unfinished, is now a bet on secured lending, gold and MSME credit rather than the microfinance model it pioneered in the state.

Quick facts

What they do

ESAF Small Finance Bank is a Kerala-headquartered small finance bank that started life lending very small sums to rural and semi-urban women, and has since broadened into a fuller retail bank. It takes deposits from the public and lends to underbanked customers who large private banks have historically skipped. Its core products span micro loans, gold loans, MSME and retail loans, agricultural credit and everyday deposit accounts, delivered through branches, business correspondents and a doorstep model in villages.

• Customer base of about 89.41 lakh (8.94 million) reported around the first half of FY25 (company disclosure).
• Total business (deposits plus advances) of ₹41,576 crore, up 12.3% year-on-year (Q3 FY25 disclosure).
• Network spanning 24 states and 2 union territories, with over 700 branches, concentrated in Kerala and Tamil Nadu (company and Wikipedia).

The origin

The founding insight was old and stubborn: the poor are bankable if you go to them. K. Paul Thomas set up the Evangelical Social Action Forum, or ESAF, as an NGO in Thrissur in 1992, aimed at the unemployed youth and the underprivileged of central Kerala. Inspired by the Grameen Bank experiment in neighbouring Bangladesh, ESAF began extending interest-free and then micro loans from 1995, making it one of India’s earliest microfinance institutions and, by its own account, the first microfinance operation in Kerala.

For two decades ESAF operated as a microfinance lender, building trust with women’s self-help groups one weekly repayment at a time. When the Reserve Bank of India opened a new category of small finance banks in 2015, ESAF was among the ten applicants granted an in-principle licence. It incorporated the bank as a public limited company on 5 May 2016, received its small finance bank licence on 18 November 2016, and began banking operations on 10 March 2017 — the first small finance bank headquartered in Kerala.

The struggle years

ESAF’s history is a sequence of shocks absorbed by a thin, unsecured, geographically concentrated book. Microfinance is a business where a single flood, epidemic or political event can freeze repayments across an entire district at once, and ESAF has lived through several.

• 2018 Kerala floods: the state’s worst floods in a century hit ESAF’s home market, disrupting borrower incomes and collections in its densest lending geography.
• 2020–21 COVID-19: the pandemic and repeated lockdowns cut cash flows for informal-sector borrowers, forcing moratoriums and higher provisioning across the microfinance sector, ESAF included.
• An earlier IPO that did not happen: ESAF received SEBI approval in March 2020 for a roughly ₹976 crore IPO, but shelved the plan amid the pandemic-hit market before returning with a smaller offer in 2023.
• FY25 microfinance stress: sector-wide over-leverage of microfinance borrowers and rising delinquencies pushed slippages up sharply, tipping ESAF into losses from the second quarter of FY25 (company results and press coverage).

The turning point

The defining event is not a single triumphant round but a reversal: FY25, when the microfinance engine that built ESAF went into reverse. On one side of the line, FY24 closed with a net profit of ₹426 crore, deposits of ₹19,868 crore and a gross NPA ratio of about 4.8%. On the other side, FY25 closed with a net loss of ₹521 crore, gross NPAs at 6.9% of advances as of 31 March 2025, and net interest margin compressed to 8.5% from 9.9% a year earlier.

The trigger was industry-wide microfinance stress, as borrowers who had taken loans from multiple lenders struggled to repay. ESAF’s net interest income fell 13.4% to ₹2,052 crore in FY25 even as total income edged up, because provisions against bad loans swallowed the difference and more. That single year forced a strategic rethink: pivot the balance sheet away from unsecured microfinance and towards secured lending.

The money behind it

ESAF’s capital story runs from private social-impact investors to a public listing that, so far, has disappointed public-market buyers.

• November 2023 IPO: the bank raised ₹463 crore (about $48 million at $1 ≈ ₹96.0) at a final price of ₹60 per share, comprising a fresh issue of ₹390.7 crore and an offer for sale of ₹72.3 crore.
• Listing: shares listed on the NSE and BSE on 10 November 2023, initially at a premium to the ₹60 issue price.
• Post-crisis re-rating: by 25 September 2026 the share traded around ₹42.9, well below the ₹60 IPO price, for a market capitalisation of roughly ₹2,212 crore (Screener).
• Pre-IPO backers: ESAF’s cap table has featured development-finance and impact investors alongside the founding ESAF entities as promoters; the founder-linked group remains the anchor shareholder.

The IPO proceeds were aimed at augmenting the bank’s Tier-1 capital base to support future lending. Capital adequacy stood at a comfortable 21.8% as of 31 March 2025, down from 23.3% a year earlier but well above the regulatory minimum — a cushion that matters when loan losses are rising.

How it makes money

ESAF is a spread business: it borrows cheaply through deposits and lends at higher rates to underserved customers, keeping the difference as net interest income. The economics look like this:

• Money in: interest on advances (micro loans historically carried the highest yields), plus fees and gold-loan income. Net interest income was ₹2,052 crore in FY25 (down 13.4% year-on-year).
• Money out: interest paid to depositors, operating costs of a high-touch rural network, and credit costs — the provisions for loans that go bad, which is where FY25 broke.
• Where the margin sits: in the yield gap. Unsecured microfinance offered fat margins (NIM near 9.9% in FY24) but at high credit risk; secured lending earns less but is steadier.
• The part people get wrong: a high net interest margin is not the same as high profit. In FY25 ESAF still ran an 8.5% NIM yet posted a loss, because provisioning, not the headline spread, decides the bottom line for a microfinance-heavy bank.
• Deposit mix: the low-cost CASA (current and savings) ratio was 24.8% as of March 2025 — modest, meaning ESAF still relies heavily on costlier term deposits.

The numbers

Three clean years of growth, then a sharp break. Figures below are in ₹ crore, from Screener and the bank’s results.

Other reported metrics that frame the FY25 break:

• Advances: roughly ₹18,030 crore in FY25, down about 1.4% from ₹18,290 crore in FY24 (Equitymaster) — the loan book actually shrank as ESAF pulled back on microfinance.
• NIM: 8.5% in FY25 versus 9.9% in FY24 (Equitymaster / ICICI Direct).
• Gross NPA: 6.9% as of 31 March 2025, up from about 4.8% a year earlier; it later moderated to 5.64% by 31 December 2025 (company and press).
• Capital adequacy: 21.8% as of 31 March 2025 (down from 23.3%).
• Return on equity: negative in FY25 as the loss flowed through — a reversal from the double-digit returns of FY23–FY24.

Where the money comes from

ESAF’s revenue has historically leaned on one product and two states, and that concentration is exactly what it is now trying to unwind.

• Product concentration: microfinance dominated the loan book for most of ESAF’s life; the secured share of gross advances was only about 45% in December 2024.
• The deliberate shift: the secured share rose to 63% by December 2025, with management targeting about 70% secured by March 2027 under a “MARG” strategy (MSME, Agri, Retail, Gold), and capping the unsecured book at 30–35% long term.
• Geographic concentration: Kerala and Tamil Nadu account for a large share of the book, which is why state-level floods or microfinance stress hit ESAF harder than a nationally diversified bank.
• The surprise: deposits kept growing right through the crisis — up 17.2% in FY25 to ₹23,276 crore even as the loan book shrank — showing depositor confidence held even while the lending side buckled.

The risks

ESAF’s risks are structural, not cosmetic, and the bank discloses most of them.

• Microfinance credit risk: unsecured group loans have no collateral to fall back on, so a regional income shock translates almost directly into slippages and provisions — the mechanism that produced the FY25 loss.
• Geographic concentration: heavy exposure to Kerala and Tamil Nadu means a state-specific event (flood, political action on lending, local downturn) can impair a disproportionate share of the book at once.
• Margin compression during the pivot: secured loans (gold, MSME, mortgages) yield less than microfinance, so the shift towards a 70% secured book is likely to keep net interest margins below the old ~10% highs even after credit costs normalise.
• Execution risk on the turnaround: the return to profit is fragile — a ₹7 crore net profit in Q3 FY26 followed a ₹116 crore loss in Q2 FY26 — so the recovery still has to prove it is durable rather than a single good quarter.

The takeaway

ESAF’s arc carries one transferable lesson: the concentration that makes a lender profitable in good years is the same concentration that can sink it in bad ones. A single product (unsecured microfinance) in a couple of states produced margins near 10% and steady profits for years — until a sector-wide stress event turned that focus into a ₹521 crore loss inside twelve months. The fix is not clever financial engineering but boring diversification: more secured lending, more products, wider geography, accepting thinner margins for steadier ones. For any business built on a high-return, high-concentration model, ESAF is a reminder that the question is not whether the shock comes, but whether the balance sheet is broad enough to absorb it when it does.

Frequently asked questions

Is ESAF Small Finance Bank listed on the stock market?

Yes. ESAF Small Finance Bank listed on both the NSE and BSE on 10 November 2023, after an IPO that raised ₹463 crore at a final issue price of ₹60 per share. It trades under the ticker ESAFSFB (BSE code 544020).

Why did ESAF Small Finance Bank report a loss in FY25?

ESAF posted a net loss of ₹521 crore in FY25, reversing a ₹426 crore profit in FY24, because of industry-wide stress in microfinance. Rising delinquencies among over-leveraged borrowers forced heavy provisioning, and the loss began from the second quarter of FY25.

Where is ESAF Small Finance Bank headquartered and when did it start?

The bank is headquartered in Mannuthy, Thrissur, Kerala. It traces its roots to the ESAF NGO founded in 1992 and microfinance from 1995; the bank itself was incorporated on 5 May 2016 and began operations on 10 March 2017.

Who founded ESAF Small Finance Bank?

It was founded by Dr. K. Paul Thomas, who set up the Evangelical Social Action Forum in 1992 and remains the bank’s Managing Director and CEO. He co-founded the broader ESAF movement with Mereena Paul.

How is ESAF trying to recover after the FY25 loss?

ESAF is shifting from unsecured microfinance to secured lending — gold, MSME, agriculture and retail loans. Its secured share rose to 63% of advances by December 2025 from 45% a year earlier, and it returned to a small ₹7 crore profit in the third quarter of FY26.

Sources

Figures are as of September 2026. Currency converted at $1 ≈ ₹96.0 as of 18 September 2026 (Trading Economics).

• Screener, ESAF Small Finance Bank financial summary (September 2026)
• Equitymaster, ESAF Small Finance Bank 2024-25 Annual Report Analysis (2025)
• ICICI Direct, ESAF Small Finance Bank quarterly results analysis (2026)
• Business Standard, ESAF SFB and RBI small finance bank licence coverage (2016–2025)
• Wikipedia, ESAF Small Finance Bank (September 2026)
• Chittorgarh / Zerodha IPO data, ESAF Small Finance Bank IPO (November 2023)
• AlphaStreet / Devdiscourse, ESAF Small Finance Bank Q3 FY26 results (December 2025)
• Trading Economics, USD/INR reference rate (September 2026)

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