ES · 10-Q · 2026Q3 · Full report

Interest Expense Increase

EVERSOURCE ENERGY · 2026-11-06 · Importance 23 · Surprise 24

Interest expense increased $157.4 million for the nine months ended September 30, 2026, including a $98.5 million increase attributable to long-term debt. Regulatory deferrals increased expense by $89.2 million, including $31.1 million of interest accrued on the FERC ROE regulatory liability during the first nine months of 2026. The increases were partly offset by a $42.0 million decrease in short-term notes payable expense.

Key facts

• Excluding the offshore wind charges, Eversource parent and other companies' losses increased $45.6 million in the first nine months of 2026, driven by a higher effective tax rate and higher interest expense.
• CL&P’s transmission-cost increase included a $48.2 million increase in regulatory deferrals, including accrued interest on the FERC ROE regulatory liability.
• NSTAR Electric’s transmission-cost increase included a $31.2 million increase in regulatory deferrals, including accrued interest on the FERC ROE regulatory liability.
• Eversource’s interest expense increased $30.6 million in the third quarter and $157.4 million in the first nine months of 2026.
• Long-term debt expense increased $29.3 million in the third quarter and $98.5 million in the first nine months of 2026.
• Interest expense from regulatory deferrals increased $12.4 million in the third quarter and $89.2 million in the first nine months of 2026; this includes FERC ROE regulatory-liability interest of $1.0 million and $31.1 million, respectively.