Regulatory matters

12 Months Ended

Dec. 31, 2023

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Regulatory matters

24. Regulatory matters

Payment of dividends by M&T’s banking subsidiaries is restricted by various legal and regulatory limitations. Dividends from any banking subsidiary to M&T are limited by the amount of earnings of the banking subsidiary in the current year and the preceding two years. For purposes of this test, at December 31, 2023, approximately $1.7 billion was available for payment of dividends to M&T from banking subsidiaries. M&T may pay dividends and repurchase stock only in accordance with a capital plan that the Federal Reserve has not objected to.

Banking regulations prohibit extensions of credit by the subsidiary banks to M&T unless appropriately secured by assets. Securities of affiliates are not eligible as collateral for this purpose.

M&T and its subsidiary banks are required to comply with applicable capital adequacy regulations established by the federal banking agencies. Failure to meet minimum capital requirements can result in certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a material effect on the Company’s financial statements. Pursuant to the rules in effect as of December 31, 2023, the required minimum and well capitalized capital ratios are as follows:

				Well
	Minimum			Capitalized
M&T (Consolidated)
CET1 to RWA		4.5	%
Tier 1 capital to RWA		6.0			6.0	%
Total capital to RWA		8.0			10.0
Leverage — Tier 1 capital to average total assets, as defined		4.0
				Well
	Minimum			Capitalized
Bank Subsidiaries
CET1 to RWA		4.5	%		6.5	%
Tier 1 capital to RWA		6.0			8.0
Total capital to RWA		8.0			10.0
Leverage — Tier 1 capital to average total assets, as defined		4.0			5.0

Capital regulations require buffers in addition to the minimum risk-based capital ratios noted above. M&T is subject to a SCB requirement that is determined through the Federal Reserve’s supervisory stress tests and M&T’s bank subsidiaries are subject to a 2.5% capital conservation buffer requirement. The buffer requirement must be composed entirely of CET1. In June 2023, the Federal Reserve released the results of its most recent supervisory stress tests. Based on those results on October 1, 2023, M&T's SCB of 4.0% became effective. Accordingly, at December 31, 2023 M&T is subject to a CET1 capital requirement of 8.5% (a sum of the SCB and the minimum CET1 capital ratio).

The capital ratios and amounts of the Company and its banking subsidiaries as of December 31, 2023 and 2022 are presented below:

(Dollars in millions)	M&T (Consolidated)			M&T Bank			Wilmington Trust, N.A.
December 31, 2023:
CET1 capital
Amount	$	16,908		$	17,667		$	583
Ratio(a)		10.98	%		11.53	%		263.48	%
Tier 1 capital
Amount	$	18,918		$	17,667		$	583
Ratio(a)		12.29	%		11.53	%		263.48	%
Total capital
Amount	$	21,533		$	19,884		$	584
Ratio(a)		13.99	%		12.97	%		263.85	%
Leverage
Amount	$	18,918		$	17,667		$	583
Ratio(b)		9.43	%		8.83	%		86.00	%
December 31, 2022:
CET1 capital
Amount	$	15,562		$	16,674		$	586
Ratio(a)		10.44	%		11.23	%		254.50	%
Tier 1 capital
Amount	$	17,573		$	16,674		$	586
Ratio(a)		11.79	%		11.23	%		254.50	%
Total capital
Amount	$	20,260		$	18,888		$	587
Ratio(a)		13.60	%		12.72	%		254.90	%
Leverage
Amount	$	17,573		$	16,674		$	586
Ratio(b)		9.23	%		8.77	%		85.73	%

(a)The ratio of capital to RWA, as defined by regulation.

(b)The ratio of capital to average assets, as defined by regulation.