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Missed change orders and unbilled extra work become profit leaks when a field request is not converted into an owned record, contract-compliant authorization, cost-and-time backup, and a line in the next payment application. Fix the handoffs: log every possible change when it appears, assign one person to move it, price it against the executed contract, preserve contemporaneous records, and reconcile the change log to commitments, invoices, schedule-of-values lines, and billing before each cutoff.
This system works for a prime contractor, subcontractor, owner’s representative, or design firm, but the authorization and payment rights always come from the actual contract and applicable law. The workflow below shows what to capture, who should act, how to bill work that is still unsettled, and where to escalate before exposure grows.
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The usual failure is not an arithmetic error on an invoice. It is a broken information flow: someone requests a deviation in the field, a crew performs it, and the project team never creates a complete chain from direction to authorization to billing. By month end, the original request may be buried in a text message, the labor is mixed into base-scope hours, a subcontractor invoice arrives without an upstream change number, and accounting has no defensible amount to include in the application for payment.
Typical leak points include:
- Unclear scope baseline: The team cannot point to the drawing, specification, allowance, RFI answer, or subcontract exhibit that defines the original work.
- Unrecorded direction: A superintendent hears “just take care of it,” but no one records who gave the direction, when, where, or whether that person had authority.
- Late pricing: Hours, material receipts, equipment time, and subcontractor quotes are collected weeks after the work, when evidence is incomplete.
- Approval confusion: A potential change is treated as approved, or an approved change is left out of the schedule of values and pay application.
- Downstream mismatch: A trade’s change cost is paid or committed, but the prime’s owner-facing change is unpriced, unapproved, or never billed.
- Cutoff blindness: The open-change list is not reconciled to daily reports, meeting minutes, invoices, commitments, and prior applications before billing closes.
Use a control system that makes each possible change visible from discovery through closeout. AIA guidance recommends agreeing early on who tracks RFIs, change orders, and payment applications, as well as the information and billing procedures used on the project (AIA’s project-cost management guidance).
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What should you establish before work starts?
Read the executed prime contract, every relevant subcontract, and incorporated exhibits before designing the log. Do not copy a generic change-order process into a project whose contract uses different forms, notice periods, markup rules, or approval authority.
Create a one-page responsibility map that names:
- Who may direct a change for the owner, architect, general contractor, or trade contractor.
- Who receives a field request and opens the potential-change record.
- Who prepares pricing, obtains subcontractor or supplier backup, and checks labor and equipment rates.
- Who issues notices and routes a change order, construction change directive, field authorization, or other contract instrument.
- Who updates the budget, commitments, schedule of values, and payment application.
- Who reviews aging, disputes, and items approaching a notice or claim deadline.
Set calendar dates for the monthly cost cutoff, subcontractor invoice deadline, owner pay-application deadline, and internal review. Define the required file evidence: daily reports, time sheets, delivery tickets, photos, marked-up drawings, RFI correspondence, meeting minutes, quotations, signed tickets, and schedule updates. At the kickoff meeting, walk field supervision, project management, accounting, client representatives, and subcontractors through one example from request to billing.
How do you record a possible change the moment it appears?
Open a numbered potential-change record as soon as a condition might alter scope, cost, or time. Identification is a forecasting and control step; it is not an admission that the customer owes the amount.
Use a mobile form, shared register, or paper field notebook that can later be entered into the project system. The initial record should contain:
| Field | What to capture | Why it matters |
|---|---|---|
| Change number and owner | Unique ID, project, responsible person, next-action date | Prevents duplicate records and orphaned follow-up. |
| Source of request | Name, company, role, date/time, location, and communication method | Shows who asked and preserves the direction trail. |
| Original scope | Drawing, specification, subcontract clause, allowance, or schedule-of-values item | Defines the baseline against which extra, deleted, or substituted work is measured. |
| Requested work | Plain-language description, quantities, exclusions, assumptions, and affected areas | Gives estimators and approvers the same scope. |
| Evidence links | RFI, sketch, email, photo, field ticket, meeting minute, or directive | Creates an auditable source record. |
| Immediate impact | Expected labor, material, equipment, subcontract, cost, and schedule effect | Allows forecasting before the final price is known. |
| Status | Potential, pricing, submitted, approved, directed-unpriced, rejected, withdrawn, billed, paid, or disputed | Separates workflow state from financial recovery. |
Record contemporaneously, even when details are incomplete. Add corrections as dated entries rather than silently overwriting the original note. AIA’s scope-creep guidance emphasizes identifying who asked, pricing cost and schedule, directing work in writing, and recording events as they happen (AIA Contract Documents’ scope-dispute guidance).
What is the difference between a potential change, a change order, and a construction change directive?
A potential change (also called a change event) is an internal record of a condition that may affect scope, cost, or time. A change order is the written instrument used when the parties agree on the changed work and its price and/or time adjustment. A construction change directive (CCD) is a contract mechanism that can direct changed work when it must proceed before price or time is settled; its use and payment consequences depend on the executed contract.
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AIA Contract Documents states, “A change order requires agreement among the owner, architect/engineer, and contractor.” Its construction-administration guide describes a CCD separately for time-sensitive or unsettled changes. That distinction does not create a universal right to perform, bill, or stop work. Check who can issue each instrument, the required form, notice method, pricing basis, and dispute procedure in your contract.
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Keep these statuses separate in the register:
- Potential: Logged for investigation or pricing; no approval implied.
- Submitted: A price and schedule proposal has been sent under the required process.
- Approved change order: The required parties have executed the agreement.
- Directed, unpriced work: Work is proceeding under a valid directive or other written contract authority while compensation remains unsettled.
- Rejected, withdrawn, or disputed: The disposition and any notice or claim deadline are recorded, not erased.
Design firms should also distinguish additional design services from construction changes. An amendment or supplemental-services document may be the proper instrument for design scope; a construction change order is not automatically a substitute.
How should you price a change without giving away margin?
Build the price from the contract’s required basis and maintain a clear bridge from estimate to actual cost. Start with a concise scope narrative, then show quantities, labor classifications and hours, wage or billing rates, materials, equipment, subcontractor quotations, credits for deleted work, and the permitted overhead, profit, insurance, bond, or other markups. State assumptions, exclusions, escalation treatment, and whether taxes or freight are included.
Request subcontractor and supplier quotes early enough to meet the upstream submission deadline. Give each quote the same change number and scope description used in the prime record. If a trade begins work before its quote is finalized, require daily tickets and a written reservation of rights consistent with the subcontract.
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Price schedule effects separately from dollars. Identify affected activities, expected start and finish, float consumed, resequencing, access constraints, procurement lead times, and any effect on a milestone or completion date. A cost proposal that omits time can leave the contractor unable to support a later time extension or impact claim.
Use a revision history. When quantities, rates, or assumptions change, preserve the prior submission, explain the variance, and obtain the required review rather than replacing evidence. A potential change can have a forecast amount, submitted amount, approved amount, incurred cost, billed amount, paid amount, retainage, and remaining exposure at the same time; do not collapse those values into one field.
What should you do when work must proceed before the price is agreed?
First confirm that the person giving the direction has authority and that the contract provides a mechanism for proceeding. Seek a written change order where possible. If delay threatens safety, critical work, or the project schedule and the contract permits a directive, obtain the directive in the required form and state that price and time remain to be determined.
Once directed work starts, keep contemporaneous time-and-material records. Federal Transit Administration contract-administration guidance says that when construction proceeds before compensation is agreed, time and materials should be documented and the price settled as soon as practicable (FTA contract-administration guidance). Record:
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- Daily labor by person or classification, hours, and applicable rate.
- Materials received and installed, with delivery tickets, invoices, waste, and returns.
- Equipment identification, operating hours, standby hours, and rate basis.
- Subcontractor and supplier tickets, signed by the authorized representative when required.
- Photos, sketches, measurements, weather or site conditions, and affected locations.
- Daily narrative linking the work to the directive and noting any delay, access issue, or concurrent activity.
Submit interim records at the contract’s frequency. Do not wait for closeout to announce that the work was extra. If the other party refuses to issue a required directive, follow the contract’s notice, claim, escalation, and suspension provisions and obtain qualified construction counsel for a material dispute.
How do you connect approved changes to billing?
Make every approved change and eligible directive visible in the billing ledger. Add a separate schedule-of-values line or sub-line where the project’s format allows, using the change number in the description. Keep base-scope completion percentages separate from change work so a project cannot appear more complete simply because extra work has been folded into an old line.
For each change, track at least:
- Contract or directive reference and approved or authorized amount.
- Work completed this period and cumulative completed value.
- Amount requested, previously billed, retainage, paid amount, and balance.
- Unapproved exposure, incurred cost, committed cost, and forecast-to-complete.
- Linked subcontractor commitment, invoice, and upstream recovery status.
The American Bar Association’s discussion of payment clauses notes that AIA A201-2017 §9.3.1.1 can permit payment-application requests for certain change work authorized by construction change directives or interim architect determinations before inclusion in a change order. That is a provision of a specific contract form, not a universal entitlement. Read the incorporated payment clauses and follow their documentation rules (ABA commentary on customizing payment clauses).
Before submitting the application, compare the prime-side change list with subcontractor invoices and commitments. A downstream invoice should not become an unrecoverable cost simply because the corresponding owner-facing item is still missing, misclassified, or past a notice deadline.
How do you reconcile the change log at every billing cutoff?
Run a formal reconciliation before each internal and owner cutoff. Export the open-change register and compare it with:
- Daily reports, foreman logs, field tickets, photos, and installed quantities.
- RFIs, sketches, meeting minutes, emails, directives, and executed change instruments.
- Purchase orders, subcontract commitments, supplier invoices, and time sheets.
- Budget and cost-to-complete reports, including uncommitted and incurred costs.
- Schedule-of-values lines, current and prior payment applications, retainage, and cash receipts.
For every mismatch, assign a person and a dated next action. Examples include “obtain signed ticket by Tuesday,” “submit revised quotation before the owner cutoff,” “add approved CO-017 to pay application line 32,” or “issue contractual notice before the claim deadline.” Require the project manager and finance lead to sign off that the reconciliation is complete.
At closeout, classify every record as approved, rejected, withdrawn, billed, paid, disputed, or still reserved. Preserve notices, backup, and unresolved claims according to the contract’s retention requirements. Do not delete a rejected or withdrawn item; its history may explain a cost variance or later settlement.
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How can you stop approvals from aging unnoticed?
Use an aging dashboard that highlights unpriced, unsubmitted, unapproved, unbilled, and unpaid changes separately. Sort by days since discovery, dollars at risk, work already performed, notice deadline, and customer or trade dependency. A $2,000 unpriced request that is two days old is a different management problem from a $200,000 directive with 45 days of labor already incurred.
Set escalation thresholds in the responsibility map. For example, require project-lead review after a defined number of days, executive or commercial review when exposure exceeds a project-specific amount, and counsel review when a notice, claim, suspension, or payment right may be affected. The thresholds must be configured to the contract and risk profile rather than copied as universal rules.
Payment clauses deserve special attention. The ABA’s Spring 2026 analysis describes how delayed processing of outstanding changes can strain cash flow and why parties negotiate protections for unsettled work. Review notice, pay-if-paid or pay-when-paid language where applicable, claim deadlines, disputed-work procedures, and any right to suspend before deciding whether to continue or stop work.
Should you use a paper logbook, spreadsheets, or software?
A small crew can use a numbered field notebook or change-order logbook to create a contemporaneous record, provided someone transfers each entry into the project’s cost and billing system. Paper is a supplement, not a legal form, approval, or invoice. A spreadsheet can work for a limited number of changes if it has controlled IDs, permissions, linked evidence, revision history, and a reliable handoff to accounting.
Software becomes more valuable as projects add trades, locations, directives, and billing layers. Evaluate a system against the workflow, not the feature count:
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- Source linkage: Can the record retain the RFI, drawing, email, ticket, and written direction?
- Cost and time: Are labor, materials, equipment, subcontractor quotes, commitments, and schedule effects distinct?
- Routing and aging: Can the system assign an owner, approval path, deadline, and escalation status?
- Financial integration: Does it connect contracts, budget, commitments, schedule of values, and pay applications without rekeying?
- Collaboration: Can subcontractors submit backup while the prime retains review and approval controls?
- Audit and export: Are revisions, approvals, notices, and reports exportable for a dispute or audit?
- Configuration: Can fields and workflows match the executed contract rather than forcing a generic process?
- Implementation burden: Can field and accounting staff use it consistently, and is the total cost justified by project volume?
Vendor materials describe platforms that combine change-event logs, requests for quotation, potential change orders, cost tracking, and budget links; those descriptions show possible workflow capabilities, not proof of savings. Configure any platform to the project’s actual authorization and billing clauses, and retain an independent export of critical records.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What roles should own the handoff?
Assign one accountable owner for each stage, even when several people contribute. A practical division is:
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- Field supervisor: identifies the condition, records direction and daily evidence, and avoids performing clearly out-of-scope work without required authorization unless an emergency or valid directive applies.
- Project manager: confirms scope baseline, routes notices, coordinates pricing, negotiates the change, and updates schedule impacts.
- Estimator or commercial manager: builds the price, checks markups and credits, and maintains revision history.
- Project accountant: links approved values and eligible directive work to commitments, schedule-of-values lines, applications, retainage, and receipts.
- Subcontract administrator: matches trade changes to upstream recovery and verifies backup before payment.
- Executive or counsel reviewer: handles material disputes, missed notices, suspension questions, and settlement strategy.
Use a short weekly review for new and aging changes and a formal monthly reconciliation for billing. The meeting should end with a named owner and next date for every open item, not merely a discussion of totals.
What metrics reveal a change-order control problem?
Track leading indicators before margin disappears:
- Days from discovery to first written record.
- Days from discovery to price submission and from submission to decision.
- Value of work performed before written authorization.
- Unpriced and unapproved exposure as a percentage of contract value and forecast cost.
- Approved changes not yet added to the schedule of values or payment application.
- Subcontractor invoices without a matching upstream record.
- Changes first identified during month-end reconciliation rather than in the field.
- Recovery rate by status: approved, billed, paid, disputed, or written off.
Review trends by project, superintendent, client, designer, and cause category. A high count of design-driven changes may indicate a coordination problem; a high count of late field discoveries may indicate weak scope review or RFI closure. A Government of Canada contract-administration page reports that a 2019 Office of the Auditor General of Toronto audit attributed 51% of change orders to design errors and omissions. That figure is from one municipal audit, not an industry-wide rate, and should be used as a prompt to examine design coordination rather than as a benchmark.
How do you implement the system on an active project?
- Day 1–2: Read the contract. Extract change definitions, authority, notices, deadlines, pricing and markup rules, schedule notices, payment support, disputed-work provisions, and suspension language.
- Day 3: Build the register. Create IDs, required fields, statuses, evidence links, owners, next-action dates, and approval roles.
- Day 4–5: Inventory exposure. Interview field leaders and subcontractors; enter every open request, directive, field condition, and unbilled extra with its earliest known date.
- Week 2: Reconstruct evidence. Match each item to daily reports, RFIs, drawings, photos, tickets, commitments, and invoices. Flag missing notices immediately.
- Week 3: Price and route. Obtain quotes, calculate labor/material/equipment and schedule effects, issue required submissions, and seek written authorization.
- Week 4: Repair billing. Add approved and contract-eligible directive work to schedule-of-values and pay-application workflows; reconcile prior billings and retainage.
- Every week thereafter: Review aging and exposure with the project lead and finance. Escalate items approaching notice or claim deadlines.
- Every cutoff and at closeout: Reconcile the register to field, cost, commitment, invoice, schedule, and payment records; preserve the final disposition and backup.
If the backlog includes a material disputed amount, missed notice, or threatened suspension, consult qualified construction counsel in the relevant jurisdiction. No generic workflow can replace the executed contract.
What is the practical rule for protecting profit?
Treat every possible change as a controlled financial event before it becomes installed work. Capture it immediately, assign an owner, obtain contract-compliant direction, price cost and time with contemporaneous evidence, connect the approved value to billing, and reconcile it at every cutoff. The discipline is simple to state but depends on consistent handoffs between field, project management, subcontract administration, and accounting.
Frequently Asked Questions
Can I bill an unsigned change order on a construction project?
Sometimes, but only when the executed contract authorizes payment for the type of directive, interim determination, or other written instruction involved. Check the incorporated payment clause, required backup, notice rules, and approval authority before including it in an application; an unsigned proposal alone is not a universal right to payment.
What should I do if the owner tells me verbally to perform extra work?
Record the request immediately with the speaker, date, location, scope, and witnesses, then request written confirmation from an authorized representative. Follow the contract’s notice and directive procedure, and preserve daily labor, material, equipment, and schedule records while seeking a formal instrument.
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Keep them for at least the retention period required by the prime contract, subcontracts, funding rules, and applicable law, including any longer period triggered by a claim, audit, warranty, or litigation hold. Preserve the original direction, revisions, notices, tickets, approvals, invoices, and payment history together.
Who should approve a subcontractor’s change before it is paid?
The person designated by the subcontract and your internal responsibility map should verify scope, authority, backup, rates, markups, and upstream recovery status. Accounting should not treat a trade invoice as an approved change merely because the work is complete or the invoice is due.
What is the fastest way to find unbilled extra work at month end?
Compare the open-change register with daily reports, RFIs, meeting minutes, field tickets, purchase orders, subcontractor invoices, and schedule-of-values lines. Search specifically for work descriptions or locations that do not match base-scope items, then assign an owner and next action before the billing cutoff.
