Borrowings and Other Financing Instruments (Tables)

6 Months Ended

Jun. 30, 2026

As of June 30, 2026, SPS had the following committed revolving credit facility available (in millions of dollars):

(a)Expires in December 2029.

(b)Includes outstanding commercial paper and letters of credit.

Money pool borrowings:


(Amounts in Millions, Except Interest Rates)	Three Months Ended June 30, 2026			Year Ended Dec. 31, 2025
Borrowing limit	$	100		$	100
Amount outstanding at period end	—			62
Average amount outstanding	97			31
Maximum amount outstanding	100			100
Weighted average interest rate, computed on a daily basis	3.68		%	4.19		%
Weighted average interest rate at period end	N/A			3.88

Commercial paper outstanding:


(Amounts in Millions, Except Interest Rates)	Three Months Ended June 30, 2026			Year Ended Dec. 31, 2025
Borrowing limit	$	600		$	600
Amount outstanding at period end	45			220
Average amount outstanding	111			97
Maximum amount outstanding	195			314
Weighted average interest rate, computed on a daily basis	4.08		%	4.51		%
Weighted average interest rate at period end	4.10			3.93