Commitments and Contingencies and Derivative Financial Instruments	6 Months Ended
Mar. 27, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies and Derivative Financial Instruments	Commitments and Contingencies and Derivative Financial Instruments Derivative Financial Instruments The Company is exposed to interest rate risk under its variable rate borrowings and additionally, due to the nature of the Company's international operations, we are at times exposed to foreign currency risk. As such, we sometimes enter into foreign exchange hedging contracts and interest rate hedging contracts in order to limit our exposure to fluctuating foreign currencies and interest rates. During fiscal 2022, the Company entered into two treasury lock agreements with a total notional value of $500.0 million to manage its interest rate exposure to the anticipated issuance of fixed rate debt before December 2023. On February 13, 2023, the Company settled these treasury lock agreements and issued the 5.90% Bonds in the aggregate principal amount of $500.0 million, which resulted in the receipt of cash and a pre-tax gain of $37.4 million, which is being amortized to interest expense and recognized over the term of the 5.90% Bonds. See Note 12- Borrowings for further discussion relating to the terms of the 5.90% Bonds. The unrealized net gain on these instruments was $19.5 million and $20.9 million, net of tax, and is included in Accumulated other comprehensive loss as of March 27, 2026 and September 26, 2025, respectively. In fiscal 2020 we entered into interest rate swap agreements to manage the interest rate exposure on our variable rate loans. By entering into the swap agreements, the Company converted the variable rate based liabilities into fixed rate liabilities for a period of five to ten years. During the fiscal 2023 transition from LIBOR to SOFR, the terms of the swaps were amended accordingly and remained designated as cash-flow hedges in accordance with ASC 815, Derivatives and Hedging. As of March 27, 2026 and September 26, 2025, the Company has one ten-year outstanding instrument with a notional value of $200.0 million. The fair value of the interest rate swap at March 27, 2026 and September 26, 2025 was $20.0 million and $20.5 million, respectively, included within miscellaneous other assets on the Consolidated Balance Sheet. The unrealized net gain on the interest rate swap as of March 27, 2026 and September 26, 2025 was $15.2 million and $15.6 million, respectively, net of tax, and was included in Accumulated other comprehensive loss. Additionally, the Company held foreign exchange forward contracts in currencies that support our operations, including British Pound, Australian Dollar and other currencies, with notional values of $1.89 billion at March 27, 2026 and $491.9 million at September 26, 2025. The length of these contracts currently ranges from one to three months. The fair value of the foreign exchange contracts at March 27, 2026 was $2.8 million, of which $4.8 million is included within current assets and $(2.0) million is included within current liabilities on the Consolidated Balance Sheet as of March 27, 2026. The fair value of the contracts as of September 26, 2025 was $(0.3) million, of which $(2.3) million is included within current liabilities and $2.0 million is included within current assets on the Consolidated Balance Sheet as of September 26, 2025. Associated income statement impacts are included in Miscellaneous expense in the Consolidated Statements of Earnings for both periods. In addition, on January 5, 2026, in connection with the PA Consulting Transaction, the Company entered into a foreign exchange forward contract with a notional value of $1.31 billion to manage its exposure to fluctuations in foreign currency exchange rates arising from its obligation to deliver the cash portion of the initial consideration payable in such transaction. On March 12, 2026 the company entered into an additional hedge with a notional value of $60.1 million to offset the original hedged amount. These were subsequently settled on March 18, 2026 and a combined loss of $(20.5) million was recorded in Miscellaneous expense in the Consolidated Statements of Earnings as of March 27, 2026. The fair value measurements of these derivatives are being made using Level 2 inputs under ASC 820, Fair Value Measurement, as the measurements are based on observable inputs other than quoted prices in active markets. We are exposed to risk from credit-related losses resulting from nonperformance by counterparties to our financial instruments. We perform credit evaluations of our counterparties under forward exchange and interest rate contracts and expect all counterparties to meet their obligations. We have not experienced credit losses from our counterparties. Leases The Company’s right-of use assets and lease liabilities presented on the Consolidated Balance Sheets relate to real estate, project assets used in connection with long-term construction contracts, IT assets and vehicles. The Company’s lease obligations are primarily for the use of office space and are primarily operating leases. The respective components of lease expense are reflected in Selling, general and administrative expenses on the Consolidated Statements of Earnings for all periods presented. Contractual Guarantees, Legal Proceedings, Claims, Investigations and Insurance In the normal course of business, we make contractual commitments (some of which are supported by separate guarantees) and on occasion we are a party in a litigation or arbitration proceeding, such as the Consolidated JV Matter (see Note 18- Segment Information). The litigation or arbitration in which we are involved includes personal injury claims, professional liability claims and breach of contract claims. Where we provide a separate guarantee, it is strictly in support of the underlying contractual commitment. Guarantees take various forms including surety bonds required by law, or standby letters of credit ("LOC" and also referred to as “bank guarantees”) or corporate guarantees given to induce a party to enter into a contract with a subsidiary. Standby LOCs are also used as security for advance payments or in various other transactions. The guarantees have various expiration dates ranging from an arbitrary date to completion of our work (e.g., engineering only) to completion of the overall project. We record in the Consolidated Balance Sheets amounts representing our estimated liability relating to such guarantees, litigation and insurance claims. Guarantees are accounted for in accordance with ASC 460-10, Guarantees, at fair value at the inception of the guarantee. At March 27, 2026 and September 26, 2025, the Company had issued and outstanding approximately $253.4 million and $217.0 million, respectively, in LOCs and $3.0 billion and $2.8 billion, respectively, in surety bonds. Of the outstanding LOC amount, $0.3 million has been issued under the JSI Revolving Credit Facility and $253.1 million are issued under separate, committed and uncommitted letter-of-credit facilities. We maintain insurance coverage for most insurable aspects of our business and operations. Our insurance programs have varying coverage limits depending upon the type of insurance and include certain conditions and exclusions which insurance companies may raise in response to any claim that is asserted by or against the Company. We have also elected to retain a portion of losses and liabilities that occur through using various deductibles, limits, and retentions under our insurance programs. As a result, we may be subject to a future liability for which we are only partially insured or completely uninsured. We intend to mitigate any such future liability by continuing to exercise prudent business judgment in negotiating the terms and conditions of the contracts which the Company enters with its clients. Our insurers are also subject to business risk and, as a result, one or more of them may be unable to fulfill their insurance obligations due to insolvency or otherwise. Additionally, as a contractor providing services to the U.S. federal government, we are subject to many types of audits, investigations, and claims by, or on behalf of, the government including with respect to contract performance, pricing, cost allocations, procurement practices, labor practices, and socioeconomic obligations. Furthermore, our income, franchise, and similar tax returns and filings are also subject to audit and investigation by the Internal Revenue Service, most states within the United States, as well as by various government agencies representing jurisdictions outside the United States. Our Consolidated Balance Sheets include amounts representing our probable estimated liability relating to such claims, guarantees, litigation, audits, and investigations. We perform an analysis to determine the level of reserves to establish for insurance-related claims that are known and have been asserted against us, as well as for insurance-related claims that are believed to have been incurred based on actuarial analysis but have not yet been reported to our claims administrators as of the respective balance sheet dates. We include any adjustments to such insurance reserves in our consolidated results of operations. Insurance recoveries are recorded as assets if recovery is probable and estimated liabilities are not reduced by expected insurance recoveries. The Company believes, after consultation with counsel, that such guarantees, litigation, U.S. government contract-related audits, investigations and claims, and income tax audits and investigations should not have a material adverse effect on our consolidated financial statements, beyond amounts currently accrued. On January 2, 2026, Jacobs entered into the Implementation Deed with PA Consulting, pursuant to which (and certain related agreements) Jacobs UK Holdings Limited acquired from shareholders of PA Consulting, other than Jacobs and its affiliates, all of the remaining issued share capital of PA Consulting owned by such shareholders in the PA Consulting Transaction. The transaction was completed on March 20, 2026. Jacobs agreed to unconditionally and irrevocably guarantee, for the period between signing of and closing of the transaction, to the other parties the performance and observance by Jacobs UK Holdings Limited of all its obligations, commitments, undertakings and warranties under the Implementation Deed. For further information, refer to Note 15- PA Consulting Redeemable Noncontrolling Interests.

The Company is exposed to interest rate risk under its variable rate borrowings and additionally, due to the nature of the Company's international operations, we are at times exposed to foreign currency risk. As such, we sometimes enter into foreign exchange hedging contracts and interest rate hedging contracts in order to limit our exposure to fluctuating foreign currencies and interest rates.

During fiscal 2022, the Company entered into two treasury lock agreements with a total notional value of $500.0 million to manage its interest rate exposure to the anticipated issuance of fixed rate debt before December 2023. On February 13, 2023, the Company settled these treasury lock agreements and issued the 5.90% Bonds in the aggregate principal amount of $500.0 million, which resulted in the receipt of cash and a pre-tax gain of $37.4 million, which is being amortized to interest expense and recognized over the term of the 5.90% Bonds. See Note 12- Borrowings for further discussion relating to the terms of the 5.90% Bonds. The unrealized net gain on these instruments was $19.5 million and $20.9 million, net of tax, and is included in Accumulated other comprehensive loss as of March 27, 2026 and September 26, 2025, respectively.

In fiscal 2020 we entered into interest rate swap agreements to manage the interest rate exposure on our variable rate loans. By entering into the swap agreements, the Company converted the variable rate based liabilities into fixed rate liabilities for a period of five to ten years. During the fiscal 2023 transition from LIBOR to SOFR, the terms of the swaps were amended accordingly and remained designated as cash-flow hedges in accordance with ASC 815, Derivatives and Hedging. As of March 27, 2026 and September 26, 2025, the Company has one ten-year outstanding instrument with a notional value of $200.0 million.

The fair value of the interest rate swap at March 27, 2026 and September 26, 2025 was $20.0 million and $20.5 million, respectively, included within miscellaneous other assets on the Consolidated Balance Sheet. The unrealized net gain on the interest rate swap as of March 27, 2026 and September 26, 2025 was $15.2 million and $15.6 million, respectively, net of tax, and was included in Accumulated other comprehensive loss.

Additionally, the Company held foreign exchange forward contracts in currencies that support our operations, including British Pound, Australian Dollar and other currencies, with notional values of $1.89 billion at March 27, 2026 and $491.9 million at September 26, 2025. The length of these contracts currently ranges from one to three months. The fair value of the foreign exchange contracts at March 27, 2026 was $2.8 million, of which $4.8 million is included within current assets and $(2.0) million is included within current liabilities on the Consolidated Balance Sheet as of March 27, 2026. The fair value of the contracts as of September 26, 2025 was $(0.3) million, of which $(2.3) million is included within current liabilities and $2.0 million is included within current assets on the Consolidated Balance Sheet as of September 26, 2025. Associated income statement impacts are included in Miscellaneous expense in the Consolidated Statements of Earnings for both periods.

In addition, on January 5, 2026, in connection with the PA Consulting Transaction, the Company entered into a foreign exchange forward contract with a notional value of $1.31 billion to manage its exposure to fluctuations in foreign currency exchange rates arising from its obligation to deliver the cash portion of the initial consideration payable in such transaction. On March 12, 2026 the company entered into an additional hedge with a notional value of $60.1 million to offset the original hedged amount. These were subsequently settled on March 18, 2026 and a combined loss of $(20.5) million was recorded in Miscellaneous expense in the Consolidated Statements of Earnings as of March 27, 2026.

The fair value measurements of these derivatives are being made using Level 2 inputs under ASC 820, Fair Value Measurement, as the measurements are based on observable inputs other than quoted prices in active markets. We are exposed to risk from credit-related losses resulting from nonperformance by counterparties to our financial instruments. We perform credit evaluations of our counterparties under forward exchange and interest rate contracts and expect all counterparties to meet their obligations. We have not experienced credit losses from our counterparties.

The Company’s right-of use assets and lease liabilities presented on the Consolidated Balance Sheets relate to real estate, project assets used in connection with long-term construction contracts, IT assets and vehicles. The Company’s lease obligations are primarily for the use of office space and are primarily operating leases. The respective components of lease expense are reflected in Selling, general and administrative expenses on the Consolidated Statements of Earnings for all periods presented.

In the normal course of business, we make contractual commitments (some of which are supported by separate guarantees) and on occasion we are a party in a litigation or arbitration proceeding, such as the Consolidated JV Matter (see Note 18- Segment Information). The litigation or arbitration in which we are involved includes personal injury claims, professional liability claims and breach of contract claims. Where we provide a separate guarantee, it is strictly in support of the underlying contractual commitment. Guarantees take various forms including surety bonds required by law, or standby letters of credit ("LOC" and also referred to as “bank guarantees”) or corporate guarantees given to induce a party to enter into a contract with a subsidiary. Standby LOCs are also used as security for advance payments or in various other transactions. The guarantees have various expiration dates ranging from an arbitrary date to completion of our work (e.g., engineering only) to completion of the overall project. We record in the Consolidated Balance Sheets amounts representing our estimated liability relating to such guarantees, litigation and insurance claims. Guarantees are accounted for in accordance with ASC 460-10, Guarantees, at fair value at the inception of the guarantee.

At March 27, 2026 and September 26, 2025, the Company had issued and outstanding approximately $253.4 million and $217.0 million, respectively, in LOCs and $3.0 billion and $2.8 billion, respectively, in surety bonds. Of the outstanding LOC amount, $0.3 million has been issued under the JSI Revolving Credit Facility and $253.1 million are issued under separate, committed and uncommitted letter-of-credit facilities.

We maintain insurance coverage for most insurable aspects of our business and operations. Our insurance programs have varying coverage limits depending upon the type of insurance and include certain conditions and exclusions which insurance companies may raise in response to any claim that is asserted by or against the Company. We have also elected to retain a portion of losses and liabilities that occur through using various deductibles, limits, and retentions under our insurance programs. As a result, we may be subject to a future liability for which we are only partially insured or completely uninsured. We intend to mitigate any such future liability by continuing to exercise prudent business judgment in negotiating the terms and conditions of the contracts which the Company enters with its clients. Our insurers are also subject to business risk and, as a result, one or more of them may be unable to fulfill their insurance obligations due to insolvency or otherwise.

Additionally, as a contractor providing services to the U.S. federal government, we are subject to many types of audits, investigations, and claims by, or on behalf of, the government including with respect to contract performance, pricing, cost allocations, procurement practices, labor practices, and socioeconomic obligations. Furthermore, our income, franchise, and similar tax returns and filings are also subject to audit and investigation by the Internal Revenue Service, most states within the United States, as well as by various government agencies representing jurisdictions outside the United States.

Our Consolidated Balance Sheets include amounts representing our probable estimated liability relating to such claims, guarantees, litigation, audits, and investigations. We perform an analysis to determine the level of reserves to establish for insurance-related claims that are known and have been asserted against us, as well as for insurance-related claims that are believed to have been incurred based on actuarial analysis but have not yet been reported to our claims administrators as of the respective balance sheet dates. We include any adjustments to such insurance reserves in our consolidated results of operations. Insurance recoveries are recorded as assets if recovery is probable and estimated liabilities are not reduced by expected insurance recoveries.

The Company believes, after consultation with counsel, that such guarantees, litigation, U.S. government contract-related audits, investigations and claims, and income tax audits and investigations should not have a material adverse effect on our consolidated financial statements, beyond amounts currently accrued.

On January 2, 2026, Jacobs entered into the Implementation Deed with PA Consulting, pursuant to which (and certain related agreements) Jacobs UK Holdings Limited acquired from shareholders of PA Consulting, other than Jacobs and its affiliates, all of the remaining issued share capital of PA Consulting owned by such shareholders in the PA Consulting Transaction. The transaction was completed on March 20, 2026. Jacobs agreed to unconditionally and irrevocably guarantee, for the period between signing of and closing of the transaction, to the other parties the performance and observance by Jacobs UK Holdings Limited of all its obligations, commitments, undertakings and warranties under the Implementation Deed. For further information, refer to Note 15- PA Consulting Redeemable Noncontrolling Interests.