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Construction delays, change orders and cost overruns are contract events: respond promptly in writing, check the contract’s notice and approval rules, document what happened, and show how it affects time and cost. Do not treat a verbal discussion, an updated estimate or a revised schedule as a substitute for the notice and authorization the contract requires. The right to extra time or money depends on the contract, the facts and applicable law—not simply on the fact that the project is late or more expensive.
What should you do first when a construction project is delayed?
Start with the contract and its exhibits, then send a factual written notice and create a record of the event. Do this promptly: a notice may preserve your position, but it does not by itself establish who caused the delay or what it should cost.
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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →- Find the governing documents. Review the signed contract, general and supplementary conditions, drawings, specifications, schedule requirements, approved change procedures and any incorporated exhibits. Locate deadlines and required recipients for notices; who can authorize a change; how time extensions and differing site conditions are handled; what applies during suspension; payment terms; and the steps for resolving a dispute. The notice method may be as important as the notice content. Federal Acquisition Regulation Subpart 43.2 addresses written change orders and supplemental agreements for federal contracts; its rules are not a universal substitute for the terms of a private or nonfederal contract. See the FAR provisions on change orders.
- Notify the required party in writing. Identify the event, when it was discovered, the work affected, what is known about likely time or cost impacts, and that supporting records will follow. Follow the contract’s delivery instructions and retain proof of delivery. If the full impact is not yet known, say so rather than guessing; update the notice as the facts develop. Avoid accepting responsibility, waiving rights or agreeing to perform extra work on terms that have not been authorized.
- Give the event an ID and open a log. Record the date, location, people involved, related drawing or instruction, affected activity, actions taken and next steps. Link the entry to daily reports, photographs, RFIs, submittals, delivery tickets, labor and equipment records, invoices, meeting minutes and correspondence. Preserve original timestamps and versions.
- Check the schedule impact. Compare the approved baseline with schedule updates contemporaneous to the event. Identify the affected activity, its predecessors and successors, available float and whether the event actually moves contractual completion. FHWA guidance calls for evaluating critical-path schedules and documenting schedule effects when assessing time extensions; see its Construction Program Management and Inspection Guide, Appendix D.
- Keep the project controlled while entitlement is reviewed. Follow the contract’s requirements for continuing undisputed work, responding to directions and requesting a determination. Do not assume that a claim automatically suspends work or that every instruction authorizes extra compensation. If the instruction is unclear or the work is urgent, promptly ask for written direction through the designated contract administrator.
A useful first notice is specific but restrained. For example: “On [date], we identified [event] affecting [location/activity], as shown in [drawing, RFI or instruction]. We are assessing the schedule and cost effect and will provide supporting information as it develops. Please confirm the required direction and authorization process. We reserve our rights under the contract.” Tailor it to the contract and facts; this example is not a substitute for any required form, deadline or legal advice.
How do you prove that an event caused a delay?
Build a causal chain from the event to the affected work and then to completion. A late finish alone does not show which party caused it, whether the event affected the critical path, or whether a time extension is due.
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For each event, document four links:
- The event: What happened, when, where and how was it communicated? Identify the instruction, missing information, site condition, delayed delivery or other specific cause rather than using a broad label such as “coordination issue.”
- The affected work: Name the activity, location, drawing or specification, and the work that could not proceed as planned. Keep records showing when the constraint began and ended.
- The schedule connection: Use the baseline and relevant schedule updates to trace the activity’s logic, predecessors, successors and float. Show whether the event consumed float or delayed a path that controls contractual completion. Explain assumptions and distinguish a forecast impact from a measured one.
- The resulting time effect: Identify the period of impact and any overlap with other delays. If owner, contractor or third-party causes overlap, record them separately; the contract and governing law determine how concurrency and responsibility are treated.
Do not rely only on a revised completion date, a single schedule screenshot or a retrospective assertion that a project “lost” a certain number of days. Preserve the baseline and each relevant update, including the data date and the facts used to prepare it. FHWA’s guidance emphasizes critical-path evaluation and records supporting schedule effects. It is useful process guidance, but the contract controls the project’s required schedule format and entitlement rules.
Mitigation matters too. Record reasonable steps taken to reduce the effect—such as resequencing, considering alternate materials or adding shifts—along with the cost and schedule result of each step. A mitigation measure may reduce delay while increasing direct cost; show both effects rather than presenting only the apparent time saved. Also record constraints on mitigation, including required approvals or unavailable resources, rather than assuming that every proposed workaround was feasible.
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What should a construction change order include?
A complete change order states exactly what changes, what it costs, how it affects time, what assumptions apply and who has approved it. It should be clear enough that the parties can price, authorize, perform and later audit the changed work.
| Item | What to state or attach |
|---|---|
| Scope and reason | Describe the added, deleted or revised work; explain why the change is needed; identify responsibility for the change and the documents that prompted it. |
| Technical references | List applicable drawing and specification numbers and revisions, RFIs, instructions and other supporting documents. |
| Price basis | State whether the amount is lump sum, based on unit prices or time and materials. Show relevant labor, equipment and material quantities, rates, markups, assumptions and exclusions. |
| Time effect | State proposed schedule days and the basis for them. Address time-related overhead separately where applicable, and explain the schedule analysis rather than treating a requested number of days as self-proving. |
| Approval and funding | Identify required approvals, the approving authority, funding and any conditions on authorization. Confirm who may direct the work under the contract. |
| Administration | State the effective date, required records, payment treatment and how the approved change will be reflected in project documents, schedule and budget. |
FHWA’s change-order resource calls for documenting why a change is necessary, its scope impact, responsibility for cost or delay and who should pay. It also notes, “A change is normally negotiated with the contractor.” That is useful guidance, not a rule that overrides an individual contract or applicable law. The resource is available as the FHWA Companion Resource for Change Orders.
Before signing, check whether the document resolves only the described change or also releases other claims, revises completion dates, changes payment terms or affects previously submitted notices. Read exclusions, assumptions and quantity limits carefully. A change order that says “no time impact,” for example, should not be signed casually if schedule analysis is still underway and the contract’s form or language would settle that issue.
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Which change-order pricing method fits the work?
The best pricing basis depends on how well the scope and quantities can be defined. The contract may specify a method or order of precedence; do not choose a method that conflicts with it.
| Pricing basis | Most useful when | Main control to preserve |
|---|---|---|
| Lump sum | The changed scope is sufficiently defined to estimate a fixed total. | Make scope, assumptions, exclusions, quantities and schedule effect explicit so price certainty does not conceal unresolved work. |
| Unit prices | The change concerns measurable quantity adjustments and applicable unit prices are available. | Record how quantities will be measured and reconciled; separate changed quantities from unrelated scope. |
| Time and materials | Urgent work must begin before the final quantity or total price can be established, if the contract permits it. | Use daily tickets and records for labor, equipment and materials, and make review or audit requirements clear. |
Whichever basis is used, identify direct costs separately from time-related costs. Direct labor, materials and equipment are different from extended supervision, site overhead, escalation, financing or home-office overhead. The contract and governing law determine whether and how those categories may be recovered. Define the proposed categories and basis, avoid counting the same cost twice, and support amounts with source records rather than rounded totals alone.
Who pays for delay costs and overruns?
Responsibility depends on the contract, the cause of the event, the schedule effect, the available records and applicable law. A delay does not automatically make the owner liable, and a contractor’s overrun does not automatically prove contractor fault.
Analyze responsibility event by event. Tie each claimed impact to an instruction, drawing, site condition, delivery or other identifiable cause. Separate owner, contractor and third-party events, and identify overlapping periods rather than combining them into one undifferentiated delay. The contract and governing law control how concurrent causes are apportioned and whether a particular category of cost or time extension is recoverable.
Then separate the impact from the entitlement question. A cost may have been incurred, but the contract may require notice, authorization or a specified form of substantiation. A schedule impact may be visible, but it still needs a defensible connection to the contractual completion date. Conversely, a prompt notice does not itself prove causation or the amount claimed. Treat notice, responsibility, time impact and cost support as linked but distinct questions.
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For an emerging overrun, compare committed and forecast costs with the approved budget and the remaining work. Identify which amounts are approved changes, pending proposals, disputed costs or forecast risks. Maintain a change register that records status, responsible party or decision owner, decision date, proposed and approved amount, requested and approved time days, and any contingency draw. This does not decide contractual entitlement; it helps prevent an unresolved proposal from disappearing into the project’s general cost total.
What records should you keep for a disputed change or delay?
Keep a single indexed record that links the event, the work, its schedule effect and its costs. Complete, contemporaneous records are more useful than a large pile of documents assembled only after a dispute begins.
- Event and notice records: event log, notices, proof of delivery, instructions, meeting minutes, emails and responses.
- Technical records: drawings and revisions, specifications, RFIs, submittals, site reports, inspection records and photographs with dates and locations.
- Time records: daily labor and equipment hours, delivery tickets, schedule baselines and updates, and records of resequencing or mitigation.
- Cost records: estimates, invoices, payroll or labor records, material quantities, equipment logs and the pricing assumptions used for the proposal.
- Approval and negotiation records: proposed changes, written directives, approvals, correspondence, cost and schedule analyses, negotiation records and the final signed instrument.
FHWA identifies accurate time, labor, equipment and material records, cost estimates, schedule modifications and related correspondence as support for a proposed change. The Federal Transit Administration’s January 2025 Project and Construction Management Guidelines similarly identify change notices and orders, correspondence, cost, schedule and scope impacts, meeting minutes and negotiation records. The FTA guidance calls for updating contracts, drawings, specifications, schedules and budgets after a change. Those sources are public-project guidance; use them as a recordkeeping framework while following the contract’s actual requirements.
Reconcile the record. Daily labor entries should correspond with payroll records; equipment hours with equipment logs; quantities with tickets and invoices; and schedule narratives with the schedule updates. Preserve original files and timestamps, identify later corrections, and maintain a clear version history. A record that explains what changed and why is stronger than an unexplained spreadsheet total.
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Use one controlled workflow for every potential change, including small field requests. The aim is to prevent informal direction from becoming untracked work, while still allowing the team to respond to urgent conditions through the contract’s authorized process.
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- Log the issue. Assign an event or change ID and record its source, discovery date, affected work and decision owner.
- Send notice. Meet the contract’s notice requirements and state what is known, what remains under assessment and what response is requested.
- Clarify the technical scope. Use an RFI or other defined process to resolve what work is required; identify current drawing and specification references.
- Analyze cost and time. Price the defined scope using the permitted basis, document labor, material and equipment quantities, and analyze schedule and time-related effects.
- Negotiate or obtain written direction. Secure approval from the person authorized under the contract. If work is directed before price is settled, document the directive and applicable pricing and recordkeeping rules.
- Update project controls. Once approved, update the contract documents, drawings, specifications, schedule, budget and change register. FTA guidance specifically calls for updates to project documents, schedules and budgets after a change.
- Procure, perform and close out. Track actual quantities and costs against the approved basis, retain daily records and reconcile the final amount and time effect.
FHWA emphasizes that change documentation should support negotiation and approval. FTA guidance likewise emphasizes project record updates. A change register should make it possible to distinguish proposed, approved, rejected and disputed items at a glance; otherwise, a pending amount can be mistaken for an approved budget change or a settled entitlement.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What if the parties disagree about authorization or entitlement?
Preserve your position in writing, follow the contract’s process and keep undisputed work moving where required. A dispute should not be managed solely through informal conversations or a last-minute claim package.
First, identify the specific disagreement: whether the work is in scope, who caused the event, whether a time extension is due, what pricing basis applies, or whether the supporting amount is adequate. Ask the contract administrator for a written determination where the contract provides for one. Keep the notice, schedule analysis and cost records connected to the disputed issue.
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Next, use the dispute route named in the contract. Depending on the agreement and jurisdiction, that could involve negotiation, mediation, a dispute board, adjudication or litigation. Do not assume every route is available or that the same deadlines apply across contracts. The contract and applicable law govern. Consider getting qualified construction or legal advice where deadlines, significant amounts, release language or work stoppage are at stake.
Finally, continue to distinguish documented fact from claim. State what is known, what is estimated and what remains disputed. A notice preserves a position but does not prove cause or amount; schedule analysis and contemporaneous cost records are needed to support those parts of the case.
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What delay and cost-overrun statistics should you use?
There is no single authoritative, harmonized cross-sector percentage in the cited material for projects experiencing construction delays or cost overruns. The official sources here are procedural and contractual guidance, not a comparable survey, so a broad industry percentage would not establish what happened on a particular job.
For project decisions, use the project’s own approved baseline, contemporaneous updates, measured quantities, actual costs and documented forecast assumptions. Keep the baseline distinct from later approved changes, and identify whether a reported figure is actual, forecast or proposed. That makes the project’s position more useful than an unsourced sector-wide average.
Frequently Asked Questions
Does a contractor have to start extra work after a verbal instruction?
The answer depends on the contract, who gave the instruction and any applicable law or emergency provision. Ask promptly for written confirmation from the authorized representative, and document any work already performed and the basis on which it was directed.
Does sending a delay notice mean the claim is approved?
No. A notice records the event and can preserve a contractual position, but it is not a finding that another party caused the impact or that a requested amount is payable. Entitlement and quantum still require contract analysis and supporting schedule and cost evidence.
Should a pending change order be included in the approved project budget?
Track it separately from approved changes, committed costs and forecast risks so readers of the cost report can see its status. Follow the project’s budget-control rules for contingency and approvals rather than treating a proposal as authorized funding.
What if the project schedule has no reliable baseline?
Preserve every available schedule version, progress update and contemporaneous record, and make the limitations clear rather than presenting a retrospective reconstruction as an approved baseline. Ask the contract administrator how schedule impacts should be assessed under the contract.
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