Nisource (NI) Interest Expense (2009 - 2026)
Nisource (NI) recorded Interest Expense of $210.5 million in Q3 2026, up 17.1% from $179.8 million a year earlier and up 5.7% from the prior quarter.
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Analysis
Nisource (NI) Interest Expense (2009 - 2026) Analysis & Trends
On a TTM basis, Nisource's Interest Expense came in at $788.6 million as of Sep 30, 2026, up 34.0% year-over-year; for FY2025, it was $639 million, up 23.5% from FY2024.
- Annual Interest Expense has increased for four straight years, with a four-year compound annual growth rate of 17.0% (FY2021 to FY2025).
- Across earlier years, Interest Expense came in at $517.2 million in FY2024 (+5.6%), $489.6 million in FY2023 (+35.4%), $361.6 million in FY2022 (+6.0%) and $341.1 million in FY2021.
- The Q3 2026 figure is the highest quarterly Interest Expense in data going back to Q2 2009.
- On a year-over-year basis, Interest Expense has increased for seven consecutive quarters, with growth averaging 24.2% over the last eight quarters.
- Peak year-over-year performance for Interest Expense in the last five years was growth of 44.3% in Q1 2026, against a decline of 2.8% in Q4 2024 at the low end.
- Per Business Quant, the preceding three quarters came in at $199.2 million (Q2 2026), $191.6 million (Q1 2026) and $187.3 million (Q4 2025).
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Interest Expense (Qtr) |
|---|---|---|---|---|---|
| 1 | Enel Chile | 299.49 Bn | 296.88 Bn | - | - |
| 2 | Nextera Energy | 179.92 Bn | 166.66 Bn | - | - |
| 3 | Southern | 105.56 Bn | 96.61 Bn | 5.92 Bn | - |
| 4 | Duke Energy | 99.44 Bn | 95.69 Bn | 5.66 Bn | - |
| 5 | National Grid | 82.69 Bn | 64.32 Bn | - | - |
| 6 | American Electric Power | 68.52 Bn | 66.31 Bn | 4.75 Bn | - |
| 7 | Dominion Energy | 59.67 Bn | 57.66 Bn | - | - |
| 8 | Entergy | 52.06 Bn | 38.50 Bn | - | - |
| 9 | Sempra | 51.32 Bn | 50.45 Bn | 2.89 Bn | - |
| 10 | Nisource | 21.54 Bn | 21.23 Bn | 1.14 Bn | - |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Sep 30, 2026 | 210.50 Mn |
| Jun 30, 2026 | 199.20 Mn |
| Mar 31, 2026 | 191.60 Mn |
| Dec 31, 2025 | 187.30 Mn |
| Sep 30, 2025 | 179.80 Mn |
| Jun 30, 2025 | 139.10 Mn |
| Mar 31, 2025 | 132.80 Mn |
| Dec 31, 2024 | 137.00 Mn |
| Sep 30, 2024 | 134.60 Mn |
| Jun 30, 2024 | 129.30 Mn |
| Mar 31, 2024 | 116.30 Mn |
| Dec 31, 2023 | 141.00 Mn |
| Sep 30, 2023 | 129.20 Mn |
| Jun 30, 2023 | 110.50 Mn |
| Mar 31, 2023 | 108.90 Mn |
| Dec 31, 2022 | 101.80 Mn |
| Sep 30, 2022 | 91.60 Mn |
| Jun 30, 2022 | 84.50 Mn |
| Mar 31, 2022 | 83.70 Mn |
| Dec 31, 2021 | 87.60 Mn |
API Access
Nisource Interest Expense API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=interest-expense&ticker=NI&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "interest-expense", "ticker": "NI", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=interest-expense&ticker=NI&period=max&api_key=YOUR_API_KEY");
const data = await res.json();