Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Contractual Obligation, Fiscal Year Maturity Schedule

As of December 31, 2025, the future minimum commitments related to these purchase contracts were as follows:

(In thousands)	2026		2027		2028		2029		2030		Thereafter
Coal(a)	$	15,564	$	8,207	$	6,349	$	—	$	—	$	—
Natural gas(b)		52,875		56,266		61,430		61,249		61,199		312,947
Purchase power(c)		5,980		5,795		258		—		—		—
Renewable energy(d)		7,369		3,403		3,434		1,385		1,413		36,370
Other		9,393		2,779		1,396		842		828		1,220
	$	91,181	$	76,450	$	72,867	$	63,476	$	63,440	$	350,537

(a)Total coal commitments for MGE's share of the Columbia and Elm Road Units, including transportation. Fuel procurement for MGE's jointly owned Columbia and Elm Road Units is handled by WPL and WEPCO, respectively, who are the operators of those facilities.

(b)MGE's natural gas transportation and storage contracts require fixed monthly payments for firm supply pipeline transportation and storage capacity. The pricing components of the fixed monthly payments for the transportation and storage contracts are approved by FERC but may be subject to change. MGE's natural gas supply commitments include market-based pricing.

(c)MGE has a purchase power agreement to help meet future electric supply requirements.

(d)Operational commitments for solar and wind facilities.

Other Commitments

MGE has several other commitments related to various projects. Payments for these commitments are expected to be as follows:

(In thousands)	2026		2027		2028		2029		2030		Thereafter
Other commitments	$	333	$	333	$	333	$	333	$	333	$	1,333