Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2025

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Assumptions Used to Determine Fair Value of Options

The fair value of options was estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions for the fiscal years ended May 31:

	2025	2024	2023
Risk-free interest rate	4.3%	3.9%	2.8%
Dividend yield	1.1%	1.1%	1.1%
Expected volatility of Cintas' common stock	26.5%	26.9%	26.0%
Expected life of the option in years	5.5	5.5	5.5

Schedule of Stock Options Granted and Outstanding

The information presented in the following table relates primarily to stock options granted and outstanding under either the 2016 Plan or under previously adopted plans:

	Shares	Weighted Average Exercise Price
Outstanding, June 1, 2022 (6,303,996 shares exercisable)	20,349,608	$	57.66
Granted	2,316,584	116.23
Canceled	(6,840)	16.45
Forfeited	(650,392)	84.87
Exercised	(4,297,952)	36.30
Outstanding, May 31, 2023 (6,185,384 shares exercisable)	17,711,008	69.50
Granted	1,633,988	165.58
Canceled	—	—
Forfeited	(442,372)	102.84
Exercised	(3,653,592)	42.91
Outstanding, May 31, 2024 (5,543,968 shares exercisable)	15,249,032	85.73
Granted	1,050,217	222.76
Canceled	—	—
Forfeited	(622,472)	142.77
Exercised	(2,998,290)	53.30
Outstanding, May 31, 2025 (4,870,890 shares exercisable)	12,678,487	$	103.72

Schedule of Information Related to Stock Options Outstanding

The following table summarizes the information related to stock options outstanding at May 31, 2025:

		Outstanding Options			Exercisable Options
Range of Exercise Prices	Number Outstanding	Average Remaining Option Life	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$21.22 - $65.20	3,590,241	2.98	$	48.20	3,590,241	$	48.20
$65.21 - $97.22	3,315,369	5.81	88.27		1,180,993	82.84
$97.23 - $122.54	3,469,620	7.66	111.53		78,700	104.09
$122.55 - $226.50	2,303,257	9.47	200.75		20,956	129.13
$21.22 - $226.50	12,678,487	6.18	$	103.72	4,870,890	$	57.85

Schedule of Restricted Stock Awards Granted and Outstanding

The information presented in the following table relates to restricted stock awards granted and outstanding under either the Amended 2016 Plan or under previously adopted plans:

	Shares	Weighted Average Grant Price
Outstanding, unvested grants at June 1, 2022	3,346,436	$	82.99
Granted	751,000	117.53
Forfeited	(204,800)	96.15
Vested	(1,146,116)	66.91
Outstanding, unvested grants at May 31, 2023	2,746,520	98.01
Granted	692,776	168.39
Forfeited	(179,352)	108.20
Vested	(647,840)	75.46
Outstanding, unvested grants at May 31, 2024	2,612,104	122.58
Granted	428,098	224.94
Forfeited	(163,748)	158.26
Vested	(839,453)	100.95
Outstanding, unvested grants at May 31, 2025	2,037,001	$	155.77