- Indian Overseas Bank is a government-owned universal bank that has spent nearly nine decades turning a simple idea - making banking accessible - into a granular, deposit-funded lending machine. Founded in 1936 in Chennai to serve underserved communities and finance international trade, it was nationalised in 1969 and is now 92.44% owned by the Government of India. The recurring approach is to gather a vast pool of stable, low-cost retail deposits and lend them out in small, diversified slices across agriculture, retail, and small business, while running one of the most digitally advanced operations among India’s public sector banks.
Business segments
Three engines built on a single deposit foundation - a dominant priority-sector lending franchise that funds farmers, households and small enterprises, a selective corporate book that takes only the safest exposures, and a treasury that manages the resulting liquidity - all fed by a granular retail deposit base that keeps the cost of funds low.
1. RAM lending: where the bank puts its money to work
Nearly four out of every five rupees the bank lends goes to retail, agriculture or MSME borrowers - a deliberate bet on granular, diversified credit that keeps risk spread thin.
- Agriculture is the single biggest book - farm loans make up 35% of domestic advances at Rs. 1,03,821 crores, more than triple the mandatory 18% priority-sector threshold, with small and marginal farmers alone receiving 23.77% of adjusted net bank credit against a 10% norm.
- Retail loans grew two-and-a-half times in four years - the Rs. 91,086 crore portfolio spans home loans (the largest chunk at Rs. 34,948 crores), vehicle loans, personal loans, and specialised products like green home loans and women-only vehicle finance with zero processing fees.
- MSME lending runs on cluster knowledge and digital pipes - the bank has identified 33 industry clusters for specialised financing and is integrated with four TReDS platforms for invoice discounting, so small suppliers get paid faster without waiting for corporate buyers.
- Financial inclusion is built into the operating model - the bank has credit-linked over a million self-help groups cumulatively, supports 50,000 street vendors through the PM Swanidhi scheme, and runs 14 rural training institutes in Tamil Nadu that consistently beat national settlement averages.
2. Corporate and wholesale banking: capital-light and safety-first
The corporate book is deliberately compact - 17% of domestic advances - and skewed toward government-backed, top-rated, and onward-lending exposures where credit risk is lowest.
- Only the safest names get on the book - the strategy targets AAA/AA rated accounts, PSU and government-guaranteed exposure, and structured lending to housing finance, MSME and vehicle finance companies rather than direct industrial credit.
- One department handles credit requirements above Rs. 40 crores for borrowers other than agriculture, retail, and MSME - the bank merged its mid-corporate and large-corporate groups into a single Corporate Credit Department, simplifying decision-making for larger borrowers.
3. Treasury and investments: the balance-sheet shock absorber
A Rs. 1,19,810 crore investment portfolio, overwhelmingly in government securities, sits on top of a deposit franchise that consistently runs a surplus - giving the bank liquidity buffers well beyond regulatory requirements.
- Government bonds dominate the book - SLR securities account for Rs. 88,552 crores of the domestic portfolio, held largely to maturity, so the bank earns a steady carry without mark-to-market noise on the bulk of its investments.
- Capital strength is a competitive advantage - a CRAR of 19.78% against a regulatory floor of 11.50%, with a CET1 ratio of 16.94%, means the bank can absorb shocks and grow without turning to the government for fresh equity.
- Asset quality has been scrubbed clean - gross NPA of 1.42%, net NPA of 0.21%, and a provision coverage ratio of 97.50% mean legacy bad loans are no longer a drag, and the bank has already set aside Rs. 1,750 crores specifically for expected credit loss requirements.
The deposit engine that funds everything
A Rs. 3,68,191 crore deposit franchise where 94% comes from stable CASA and retail term deposits - giving the bank one of the lowest-cost funding bases among Indian public sector lenders.
- CASA is the moat - current and savings accounts make up 41% of total deposits at Rs. 1,50,936 crores, and the bank adds 3-4 new CASA customers per branch per day across its 3,336-branch network, onboarding approximately 65 lakh new CASA customers over FY2023-24 and FY2024-25.
- Retail term deposits provide the ballast - at Rs. 1,83,601 crores, these are the single largest funding block, and products like the auto-sweep SB-Max account and step-up recurring deposits are designed to keep savers inside the ecosystem rather than shopping for rates.
- Government business adds sticky float - the bank collects direct and indirect taxes, handles the Tamil Nadu state treasury, services central government pensions through a dedicated processing centre, and runs small-savings schemes, all of which bring low-cost, long-duration balances.
Digital backbone
A technology stack that processes 98.38% of transactions digitally, with UPI alone driving nearly 90% of the digital mix - making the branch network a distribution channel rather than a transaction-processing burden.
- Core systems are modern and redundant - the bank runs on Finacle 10.2.25 (the second PSB to adopt this version) across a four-way data centre setup with zero-data-loss replication, a Tier-3 primary centre in Chennai, and a private cloud platform upgraded to VMware VCF 9.0.
- Digital lending is automated end-to-end - the Loan Origination System covers over 90 RAM schemes with near-100% adoption, and the bank is among the top 2 PSBs on the Unified Lending Interface platform, having disbursed roughly Rs. 5,700 crores across 2.6 lakh accounts.
- Mobile is the primary branch - 129.58 lakh users are registered on the IOB Connect app, which handles everything from biometric login and UPI to ASBA applications and voice-assisted banking in ten regional languages, with 15,000 new users enrolling daily.
- Robots handle the repetitive work - UiPath-based robotic process automation runs campaign management, batch processing, reconciliation and automated complaint handling, freeing staff for customer-facing work.
Group structure and partners
A government-controlled bank with a 92.44% sovereign shareholder, a regional rural bank in Odisha, and minority stakes in an insurer and a new credit-rating venture.
- The Government of India owns nearly the entire bank - 92.44% as of March 2026, with LIC holding roughly 3%, making IOB effectively a sovereign-backed funding vehicle.
- Odisha Gramya Bank extends rural reach - IOB sponsors this regional rural bank with a 35% stake, giving it indirect access to 549 branches across 13 districts of Odisha and a Rs. 17,738 crore business mix without carrying the operating cost on its own books.
- Universal Sompo General Insurance is the bancassurance play - an 18.06% equity stake in this non-life insurer, alongside a corporate agency arrangement dating back to 2008, lets IOB earn fee income by distributing general insurance products through its branch network.
- A new credit-rating subsidiary is in the works - in May 2025, the bank agreed to take a 26% stake in ACER Credit Rating Pvt. Ltd. for Rs. 6.50 crores, adding ESG ratings and financial instrument appraisal to its capabilities.