A rate offer is not a pricing decision — it is an NIM commitment. An institution that offers 9.60% to acquire a borrower without modelling the expected credit cost, the funding cost at current rates, the processing cost of this loan type, and the expected prepayment behaviour is not pricing — it is guessing. The Risk-Based Pricing Agent AI runs a margin simulation for every rate offer before it is made, confirming that the rate produces an acceptable net interest margin even at the expected loss rate for this specific borrower profile.
The margin components that the pricing model must balance
The net interest margin (NIM) on a retail loan is not the difference between the rate and the cost of funds. It is that difference, reduced by the expected credit cost (the probability of default multiplied by the loss given default), further reduced by the processing and operational cost of the loan, and adjusted for the prepayment risk that shortens the life of high-rate loans. A pricing model that only looks at the rate-to-cost-of-funds spread will consistently underprice credit risk and overprice competitive risk — both errors cost the institution.
The four margin components that the Pricing AI models for each offer are: funding spread (the rate offered minus the institution's cost of funds at the current tenor), expected credit cost (probability of default for this borrower's risk tier multiplied by the expected loss given default), operational cost allocation (processing, collection, documentation, and compliance cost amortised over the expected loan life), and prepayment risk adjustment (higher-rate borrowers who prepay when rates fall reduce the institution's realised margin below what the original rate implied). All four are computed before the offer is generated.
The margin simulation: three rate scenarios for a single borrower
The four margin components: how each is computed
The expected credit cost is computed from the borrower's risk tier and the institution's historical loss rate for that tier. For a CIBIL 720–739 salaried home loan borrower, the institution's portfolio data shows a 0.72% annualised credit cost (0.68% used above, adjusted for this borrower's specific profile including their income trend). This is not a generic industry figure — it is the institution's own loss history for this specific risk cell, updated quarterly.
The operational cost allocation is the total cost of originating, servicing, and collecting a loan of this type and tenure, divided by the expected outstanding balance over the loan life. For a ₹28 lakh home loan at 9.75% over 20 years, the origination cost (legal, processing, KYC, technology), the annual servicing cost (statement generation, NACH management, annual review), and the expected collection cost (based on portfolio delinquency rate) total approximately ₹1.18 lakhs over the loan life — amortised to approximately 0.42% of the outstanding balance annually.
Prepayment risk is the risk that the borrower refinances to a lower rate (or takes a better offer from a competitor) before the expected loan tenure ends. Higher-rate borrowers are more likely to prepay when rates fall, which cuts the institution's realised margin on those loans. The prepayment adjustment accounts for this expected income reduction, which is higher for Scenario C (10.10%) and lower for Scenario B (9.75%) because a competitive rate is less likely to trigger a refinance.
The NIM floor is not a constraint on pricing — it is the definition of viable pricing
Every institution has a cost of funds, a cost of credit, and a cost of operations. The sum of those three costs defines the minimum rate at which a loan is economically viable. An offer below that minimum — made to match a competitor, to hit an acquisition target, or to avoid losing a borrower — is not a competitive pricing decision. It is a cross-subsidisation decision: this loan is being partially funded by the margin on other loans in the portfolio. The Risk-Based Pricing Agent AI models all three costs for every offer before it is made, and does not generate an offer that falls below the NIM floor — even when the resulting rate is above the best available competitor rate. The institution that prices correctly sustains its margins across credit cycles. The institution that prices to win at any rate does not.