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Employee Benefit Plans (Tables) | 12 Months Ended
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Aug. 30, 2025
Postemployment Benefits [Abstract] |
Components of Net Periodic Benefit Cost | The components of net periodic benefit cost for fiscal 2025, 2024 and 2023 are as follows (in thousands):
|  | UniFirst Plan |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Service cost |  | $ | 73 |  |  | $ | 74 |  |  | $ | 73 |  |  | $ | 390 |  |  | $ | 405 |  |  | $ | 486 |
Interest cost |  |  | 148 |  |  |  | 159 |  |  |  | 147 |  |  |  | 1,239 |  |  |  | 1,255 |  |  |  | 1,191 |
Expected return on assets |  |  | (91 | ) |  |  | (90 | ) |  |  | (101 | ) |  |  | — |  |  |  | — |  |  |  | — |
Amortization of prior service cost |  |  | 21 |  |  |  | 21 |  |  |  | 21 |  |  |  | — |  |  |  | — |  |  |  | — |
Amortization of actuarial gain |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (41 | ) |  |  | (116 | ) |  |  | — |
Other events |  |  | (10 | ) |  |  | — |  |  |  | (12 | ) |  |  | — |  |  |  | — |  |  |  | — |
Net periodic benefit cost |  | $ | 141 |  |  | $ | 164 |  |  | $ | 128 |  |  | $ | 1,588 |  |  | $ | 1,544 |  |  | $ | 1,677 |
Schedule of Obligations and Funded Status | The Company’s obligations and funded status as of August 30, 2025 and August 31, 2024 are as follows (in thousands):
|  | UniFirst Plan |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Projected benefit obligation, beginning of year |  | $ | 3,609 |  |  | $ | 3,549 |  |  | $ | 25,880 |  |  | $ | 25,119 |
Service cost |  |  | 73 |  |  |  | 74 |  |  |  | 390 |  |  |  | 405 |
Interest cost |  |  | 148 |  |  |  | 159 |  |  |  | 1,239 |  |  |  | 1,255 |
Actuarial loss (gain) |  |  | 3 |  |  |  | (28 | ) |  |  | (2,549 | ) |  |  | 465 |
Benefits paid |  |  | (37 | ) |  |  | (145 | ) |  |  | (1,481 | ) |  |  | (1,364 | )
Settlements |  |  | (792 | ) |  |  | — |  |  |  | — |  |  |  | — |
Projected benefit obligation, end of year |  | $ | 3,004 |  |  | $ | 3,609 |  |  | $ | 23,479 |  |  | $ | 25,880 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets, beginning of year |  | $ | 3,108 |  |  | $ | 2,986 |  |  | $ | — |  |  | $ | — |
Actual return on plan assets |  |  | 27 |  |  |  | 20 |  |  |  | — |  |  |  | — |
Employer Contributions |  |  | 168 |  |  |  | 247 |  |  |  | — |  |  |  | — |
Benefits paid |  |  | (37 | ) |  |  | (145 | ) |  |  | — |  |  |  | — |
Settlements |  |  | (792 | ) |  |  | — |  |  |  | — |  |  |  | — |
Fair value of plan assets, end of year |  | $ | 2,474 |  |  | $ | 3,108 |  |  | $ | — |  |  | $ | — |
Funded status (net amount recognized) |  | $ | (530 | ) |  | $ | (501 | ) |  | $ | (23,479 | ) |  | $ | (25,880 | )
Schedule of Amounts Recorded on Consolidated Balance Sheet | The amounts recorded on the Consolidated Balance Sheets as of August 30, 2025 and August 31, 2024 are as follows (in thousands):
|  | Pension Plans |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Deferred tax assets (liabilities) |  | $ | 4 |  |  | $ | (10 | ) |  | $ | (1,388 | ) |  | $ | (750 | )
Accrued liabilities |  |  | 530 |  |  |  | 501 |  |  |  | 23,479 |  |  |  | 25,880 |
Accumulated other comprehensive (loss) income |  |  | (11 | ) |  |  | 30 |  |  |  | 4,071 |  |  |  | 2,200 |
Schedule of Amounts Recognized in Accumulated Other Comprehensive Loss | As of August 30, 2025 and August 31, 2024, the amounts recognized in accumulated other comprehensive loss are as follows (in thousands):
|  | UniFirst Plan |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net actuarial gain |  | $ | 36 |  |  | $ | 113 |  |  | $ | 5,459 |  |  | $ | 2,950 |
Unrecognized prior service cost |  |  | (51 | ) |  |  | (73 | ) |  |  | — |  |  |  | — |
Accumulated other comprehensive (loss) income |  | $ | (15 | ) |  | $ | 40 |  |  | $ | 5,459 |  |  | $ | 2,950 |
Weighted Average Assumptions Used in Calculating Projected Benefit Obligation | The weighted average assumptions used in calculating the Company’s projected benefit obligation as of August 30, 2025 and August 31, 2024 are as follows:
|  | UniFirst Plan |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Discount rate |  |  | 5.1 | % |  |  | 4.8 | % |  |  | 5.4 | % |  |  | 4.9 | %
Rate of compensation increase |  | N/A |  |  | N/A |  |  |  | 5.0 | % |  |  | 5.0 | %
Weighted Average Assumptions Used in Calculating Net Periodic Service Cost | The weighted average assumptions used in calculating the Company’s net periodic service cost for fiscal 2025, 2024 and 2023 are as follows:
|  | UniFirst Plan |  |  | SERP |
|  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Discount rate |  |  | 4.8 | % |  |  | 5.1 | % |  |  | 4.3 | % |  |  | 4.9 | % |  |  | 5.2 | % |  |  | 4.4 | %
Expected return on plan assets |  |  | 3.5 | % |  |  | 3.5 | % |  |  | 3.5 | % |  | N/A |  |  | N/A |  |  | N/A |
Rate of compensation increase |  | N/A |  |  | N/A |  |  | N/A |  |  |  | 5.0 | % |  |  | 5.0 | % |  |  | 5.0 | %
Schedule of Expected Future Benefit Payments | The benefit payments, which reflect expected future service, are expected to be paid for the five fiscal years subsequent to August 30, 2025 and thereafter are as follows (in thousands):
|  | UniFirst Plan |  |  | SERP |
2026 |  | $ | 757 |  |  | $ | 1,738 |
2027 |  |  | 97 |  |  |  | 1,736 |
2028 |  |  | 157 |  |  |  | 1,673 |
2029 |  |  | 219 |  |  |  | 1,768 |
2030 |  |  | 198 |  |  |  | 1,557 |
Thereafter |  |  | 1,576 |  |  |  | 15,007 |
Total benefit payments |  | $ | 3,004 |  |  | $ | 23,479 |

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- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 + Details
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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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