Indian Railway Finance Corporation Ltd. makes a corporate announcement

IRFC’s weighted average cost of incremental borrowing increased to 6.55% in FY26 from 5.03% in FY25, a 1.52 percentage-point rise. The FY26 figure is also reported as the weighted average cost of funds, while the comparative rates appear as the capitalisation rates used for railway infrastructure projects.^{[1] [2]}

The lease-pricing mechanism with the Ministry of Railways is designed to preserve the spread: the lease rental rate and implicit rate of return are set with reference to the average cost of annual incremental borrowings plus a margin.^[3] For rolling-stock leases, the same cost-plus formulation is specified for the lease rental rate and IRR.^[4]

Interpretation: the 1.52 pp rise in borrowing cost should, under the contractual cost-plus framework, be passed through into lease pricing rather than automatically compressing IRFC’s spread. This is consistent with IRFC’s broader cost-plus lease model, which is intended to maintain a net interest margin.^[5] However, the absolute margin over the borrowing cost is not quantified in the cited disclosures.

One important qualification is that no fresh disbursement was made to the Ministry of Railways from FY23 onward, and IRFC states that the weighted average cost of capital and margin had been finalised for disbursements up to FY23.^[2] Therefore, FY26’s 6.55% is best viewed as the current borrowing-cost benchmark; it does not demonstrate a newly originated MoR lease spread in FY26.

The latest Q1 FY27 filing discloses lease receivables of Rs 1,64,768.83 Crores relating to Project EBR IF 2019-20, Project EBR IF 2020-21 and Project EBR-S. However, the amount was recognised with effect from 24 March 2026, and the related lease agreement was still under execution at 30 June 2026; therefore, it should not be treated as a Q1 FY27 acquisition or as a separately disclosed “rolling stock asset” addition. ^[6]

Balance-sheet impact as of 30 June 2026:

• Loan book/AUM: Rs 4.79 lakh Crores, compared with Rs 4.85 lakh Crores at 31 March 2026 — a decline of approximately Rs 6,000 Crores, or 1.24%, rather than an increase equal to the lease-receivable amount. ^[7]
• Outstanding debt: Rs 4,37,028.79 Crores versus Rs 4,36,470.39 Crores at 31 March 2026, an increase of Rs 558.40 Crores. ^[8]
• Debt-to-equity ratio: 7.43x versus 7.69x at 31 March 2026, a reduction of 0.26x. ^[8]

The reduction in leverage reflects the stronger increase in net worth — to Rs 58,791.95 Crores from Rs 56,748.76 Crores — offsetting the modest rise in outstanding debt. ^[8]

Bottom line: the latest filing supports a disclosed lease-receivable value of Rs 1,64,768.83 Crores, but not a current-quarter rolling-stock acquisition of that amount. The reported loan book actually contracted sequentially, while debt-to-equity improved from 7.69x to 7.43x.

Current annualized NIM was 1.48% in Q1 FY27, but a precise comparison with the historical five-year average cannot be made because a complete five-year annual NIM series is not reported in the cited disclosures. The current figure is 2 bps below FY26’s 1.50% ^[9]. A third-party historical data point puts FY25 NIM at 1.37%, implying current NIM is 11 bps higher than FY25 ^[10]. Earlier disclosed annualized readings were 1.64% in H1 FY22 and 1.62% in Q3 FY22, but these are interim rather than full-year measures ^{[11] [12]}.

What can be attributed

• Cost of market borrowings: Funding-cost pressure is visible, but its precise NIM contribution is not quantifiable. FY26 weighted average cost of funds was 6.55% ^[13], versus FY25 average cost of incremental medium- and long-term borrowings of 7.07% ^[14]. These are not identical definitions, so the 52 bps difference should not be treated as a clean NIM bridge. In Q1 FY27, finance costs rose 25.3% YoY to Rs 6,421 Crores, which is consistent with pressure from the liability side ^[15].
• Lease rental structure: IRFC’s lease rental rate and implicit return are set with reference to the average cost of incremental borrowings plus an agreed margin, with variations adjusted at year-end ^[3]. Interest-rate and foreign-exchange variations are also adjusted through lease or pre-commencement lease income ^[4]. This makes the lease structure a cost-pass-through mechanism, rather than an independent driver that can be cleanly separated from borrowing costs.
• Current mix effect: In Q1 FY27, lease income rose 31.29% YoY to Rs 7,094.47 Crores, while interest income fell 23.37% YoY to Rs 1,147.56 Crores ^[16]. This indicates that asset mix and lease-income recognition materially shaped reported income, but it does not establish how many NIM basis points came from lease pricing.

Analyst read: The current 1.48% NIM reflects a combination of funding-cost pressure and asset/lease-income mix, but the two effects are mechanically linked under IRFC’s cost-plus model. Therefore, the attributable split is not disclosed and cannot be reliably calculated from the reported NIM, funding-cost figures and lease-income data alone. A company-provided NIM bridge separating funding cost, lease pass-through, margin, asset mix and recognition timing would be required.