Note 4. Revenue

Revenue is recognized over time using the input method in accordance with ASC 606, measured by the percentage of cost incurred to date to the estimated total cost for each contract. This method is used because we believe expended cost to be the best available measure of progress on contracts.

Our contracts are primarily in the form of firm fixed-price and fixed-price per unit. A large portion of our contracts have scope defined adequately, which allows us to estimate total contract value upon the signing of a new contract. Upon signing a new contract, we allocate the total consideration across various contractual promises to transfer a distinct good or service to a customer. These are grouped into specific performance obligations. This process requires significant management judgement. Most of our contracts have a single performance obligation. For contracts with multiple performance obligations, we allocate the total transaction price based on the estimated standalone selling price, which is the total project costs plus a budgeted margin percentage, for each of the performance obligations.

Revenue is recognized when, or as, the performance obligations are satisfied. Our contracts do not include a significant financing component. Costs to obtain contracts are generally not significant and are expensed in the period incurred.

Estimating cost to complete of long-term contracts involves a significant amount of estimation and judgement. For long-term contracts, we use the calculated transaction price, estimated cost to complete the project, and the total costs incurred on the project to date to calculate the percentage of the project that is complete. The estimated costs to complete the project and the estimated transaction price can change due to unforeseen events that can either increase or decrease the margin on a particular project.

Our contract structures typically allow for variable consideration. A significant portion of this variable consideration comes in the form of change order requests and claims. Other variable consideration can include volume discounts, performance bonuses, incentives, liquidated damages, and other terms that can either raise or lower the total transaction price. We estimate variable consideration based on the probability of being entitled to collection of specific amounts. We include amounts that we believe we have an enforceable right to collect, based on our expected probability of success with specific claims or contractual rights. Our estimates of total variable consideration rely on all available information about our customer including historical, current, and forecasted information.

Many of our contracts require contract modifications resulting from a change in contract scope or requirements. Change orders are issued to document changes to the original contract. We can have approved and unapproved change orders. Unapproved change orders are contract modifications for which we or our customers have not agreed to terms, scope and price. Contract modifications are necessary for many reasons, including but not limited to, changes to the contract specifications or design from the customer, modification to the original scope, changes to engineering drawings, or other required deviation from the original construction plan. Contract modifications may also be necessary for reasons including, but not limited to, other changes to the contract which may be out of our control, such as rain or other weather delays, incomplete, insufficient, inaccurate engineering drawings, different site conditions from information made available during the estimating process, or other reasons. An unapproved change order may turn into a formal claim if we cannot come to an agreement with the owner but are contractually entitled to recovery of costs and profits for work performed. Costs incurred related to contract modifications are included in the estimated costs to complete and are treated as project costs when incurred. Unless the contract modification is distinct from the other goods and services included within the project, the contract modification is accounted for as part of the existing contract. The effect of any modifications on the transaction price, and our measure of the percentage-of-completion on specific performance obligations for which the contract modification relates, is recognized as a cumulative catch-up adjustment to revenue recognized. In some cases, contract modifications may not be fully settled until after the completion of work as specified in the original contract.

We review and update our contract estimates regularly on every construction project. Any adjustments in estimated profit, via changes in estimated revenues and estimated costs, on contracts is recognized under the cumulative catch-up method. Under this method, the cumulative impact of a revenue, cost, or profit adjustment is recognized in the period the updated estimates are identified, which may include a reversal of amounts recognized in prior periods. The input of actual costs is used in the percentage-of-completion formula that takes into account current changes in estimates that are treated on a prospective basis. Adjustments in contract estimates resulted in a decrease in gross profit of $13.4 million and $26.7 million for three and six months ended June 30, 2025, respectively. Adjustments in contract estimates resulted in a decrease in gross profit of $83.5 million and $108.5 million for the three and six months ended June 30, 2024, respectively.

If a contract is deemed to be in a loss position, the projected loss is recognized in full, including reversal of any previously recognized margin, in the period in which the change in estimate is made. Losses are recognized as an accrued loss provision on the consolidated balance sheets in the accrued liabilities caption. For contract revenue after the date that the loss is accrued, the accrued loss provision is adjusted so that the gross profit for the contract remains zero in future periods, subject to future adjustments to the overall expected profit or loss as determined at such time. As of June 30, 2025 and December 31, 2024, we had $11.6 million and $15.7 million, respectively, in accrued loss provisions.

We estimate the likelihood of collection during the bidding process for new contracts. Customers with a history of late or non-payment are typically avoided in the bidding process. We consider the necessity for write-down of receivable balances in conjunction with GAAP when evaluating our estimates of transaction price and estimated costs to complete our projects.

We bill our customers in conjunction with our contract terms. Our contracts have three main categories, (i) contracts that are billed based on a specific timeline, (ii) contracts that are billed upon the completion of certain phases of work, or milestones, and (iii) contracts that are billed as services are provided. Some of our contracts are billed following the recognition of certain revenue. This creates an asset on our consolidated balance sheets captioned “contract assets.” Other contracts’ schedules allow us to bill customers prior to recognizing revenue. These contracts create a liability on our consolidated balance sheets captioned “contract liabilities.”

We segregate our business into two reportable segments: Transportation and Civil. Our Chief Operating Decision Maker (“CODM”), the Chief Executive Officer, uses these segments in order to operate the business. Our segments offer different specialty infrastructure services. Our CODM regularly reviews our operating and financial performance based on these segments. Each of our reportable segments is composed of similar business units that specialize in specialty infrastructure projects that are unique.

Our business is managed using revenue and gross profit primarily. Our CODM regularly uses this information to review operating results, plan future bids, allocate resources, target customers, and plan future growth and capital allocations. To determine reportable segment gross profit, certain allocations, including allocations of shared and indirect costs, such as facility costs, equipment costs, and indirect operating expenses, were made.

Our Civil segment is comprised of Oscar Renda Contracting, Inc., Mole Constructors, Inc., Southland Contracting, Inc., Southland Holdings, LLC, Renda Pacific, LLC, Southland Renda JV, Southland RE Properties, Oscar Renda Contracting Canada, Southland Mole of Canada, Southland Technicore Mole joint venture, and Southland Mole of Canada/Astaldi Canada Design & Construction JV (“Southland Astaldi”). In November 2024, the Company dissolved the Southland Technicore Mole joint venture. This segment focuses on projects throughout North America that include the design and construction of water pipeline, pump stations, lift stations, water and wastewater treatment plants, concrete and structural steel, outfall, and tunneling.

Our Transportation segment is comprised of American Bridge, Heritage Materials, LLC, and Johnson Bros. Corporation. This segment operates throughout North America and specializes in services that include the design and construction of bridges, roadways, marine, dredging, ship terminals, and piers, and specialty structures and facilities.

Total assets by segment are not presented as our CODM, as defined by ASC 280, does not review or allocate resources based on segment assets. We do not have material intersegment revenue or gross profit. Joint ventures are classified into the segment with which the projects align.

Segment Revenue

Revenue by segment for the three and six months ended June 30, 2025 and 2024, was as follows:  

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Segment Cost of Construction

Cost of construction by segment three and six months ended June 30, 2025 and 2024, was as follows:

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Segment Gross Profit (Loss)

Gross profit (loss) by segment for the three and six months ended June 30, 2025 and 2024, was as follows:

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Revenue earned outside of the United States was 15% and 19% for the three months ended June 30, 2025 and 2024, respectively. Revenue earned outside of the United States was 15% and 23% the six months ended June 30, 2025 and 2024, respectively.