What counts as an allowable cost?

Allowable costs must be defined in the contract and typically include direct labor, materials, subcontractor invoices, equipment rental, and permits. Exclusions should be explicit to avoid audit disputes; require original receipts and payroll records as supporting evidence.

How are change orders handled?

Require written change orders before changed work proceeds. Each change order should state scope, cost method, schedule impact, and required approvals; this prevents retroactive claims and preserves the agreed fee calculation.

Can the contract be signed electronically?

Yes. Electronic signatures are enforceable under the ESIGN Act (15 U.S.C. §7001) and state UETA statutes where adopted. Ensure the eSignature process captures intent, consent, attribution, and retention for legal validity.

What records are required for audits?

Maintain invoices, payroll, timecards, subcontractor agreements, material delivery receipts, and bank records. Specify in the contract the audit period and the format for producing records to the owner or an independent auditor.

How to limit owner exposure to cost overruns?

Use a guaranteed maximum price (GMP) addendum, set caps on reimbursable costs, require prior approval for major purchases, and include regular cost reporting to detect trends early.

What happens on contract termination?

Define termination compensation: allow payment for allowable costs incurred plus fee for work performed, specify return of unearned advance funds, and outline final accounting and audit rights for a defined post-termination period.

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Cost Plus Construction Contract

Cost Plus Construction Contract

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What a Cost Plus Construction Contract Is

A Cost Plus Construction Contract is a written agreement in which the owner agrees to reimburse the contractor for actual project costs plus an additional fee or percentage for overhead and profit. The contract typically defines allowable cost categories (labor, materials, subcontractor fees, equipment, permits), the contractor's fee structure (fixed fee, percentage markup, or cost-plus-with-a-guaranteed-maximum), invoicing cadence, audit rights, and procedures for change orders and dispute resolution. This form supports projects with uncertain scope, phased work, or fast starts where fixed-price estimates are impractical, and it establishes responsibilities for documentation, recordkeeping, and payment.

Why Parties Choose a Cost Plus Contract

Cost plus contracts provide transparency and flexibility when project scope or site conditions are uncertain. Owners benefit from open-book accounting and audit rights; contractors reduce bid risk and recover actual costs. The model can accelerate project starts and make change orders simpler to manage while shifting some cost-variability back to the owner.

Who Commonly Uses Cost Plus Contracts

Parties should confirm role-specific responsibilities (cost tracking, supporting documentation, insurance, bonding) in the contract before work begins.

Owners and developers who need schedule flexibility and transparency during design or site discovery.
General contractors managing multiple trades where final quantities are unknown at bid time.
Subcontractors or specialty trades performing variable scope work or early-phase procurement.

Core Elements to Include in a Professional Contract

A robust Cost Plus Construction Contract defines scope, cost rules, fee mechanics, documentation, change order procedures, and dispute resolution mechanisms to reduce future ambiguity.

Allowable Costs

List specific cost categories that are reimbursable (direct labor, materials, subcontractor invoices, equipment rental, permits) and exclude items such as owner-provided materials or contractor penalties.

Contractor Fee

Specify fee method (fixed amount, percentage of costs, or cost-plus with GMP), payment timing, and whether the fee applies to subcontractor pass-throughs or only direct costs.

Cost Documentation

Detail required backup (invoices, payroll records, receipts), accounting method, and acceptable formats to support reimbursement and audit rights.

Change Orders

Establish a written change order process including authorization, pricing method for changes, schedule impact evaluation, and record of approvals.

Audit and Access

Grant owner or third-party audit rights for a stated period; specify how disputes arising from audits will be resolved and cost adjustments handled.

Termination & Remedies

Define termination for convenience/default, payment upon termination (allowed costs plus fee), retainage, and dispute resolution mechanisms such as mediation or arbitration.

How to Complete the Contract, Step by Step

Follow these sequential steps to prepare an enforceable Cost Plus Construction Contract and reduce ambiguity before work begins.

01

Review Scope: Confirm project boundaries, phasing, exclusions, and baseline assumptions in writing.
02

Define Costs: List allowable cost categories, accounting methods, and required supporting documents.
03

Set Fee & Terms: Choose fee formula, payment schedule, retainage, and invoicing cadence.
04

Agree Change Orders: Document the change order approval workflow, pricing approach, and time impact procedures.

Typical Cost Plus Workflow from Execution to Closeout

A clear workflow ties contract language to on-site practice, invoicing, review, and final accounting.

Contract Execution: Parties sign finalized agreement and exchange insurance certificates and bonds if required.
Cost Tracking: Contractor records costs daily and categorizes them per the contract's definitions.
Invoicing & Review: Contractor submits periodic invoices with supporting docs; owner reviews and requests clarifications.
Audit & Closeout: Owner or auditor verifies records; final payment adjusts for any disallowed costs or agreed changes.

Online Workflow Settings to Configure for Cost Tracking

When using a digital platform, enable controls that mirror contract requirements and preserve auditability.

Field	Configuration
Signer Authentication	Use email+SMS or higher assurance for owner approvers
Document Templates	Include cost schedules, change order forms, and invoice templates
Conditional Fields	Show cost-breakdown fields only to contractor role
Archive & Retention	Export signed PDFs and store with versioning and audit trail

Technical and Integration Considerations for eSigning and Records

Ensure the platform you use supports export of signed records and retains metadata (timestamps, IP, signer attribution) for audits and compliance.

Integrations: Procore, NetSuite, and Google Workspace supported
File Formats: Accepts PDF, DOCX, and Excel exports
Authentication: Offers SMS, email, and advanced methods

Security and Compliance Essentials for Signed Contracts

In-Transit Encryption: TLS 1.2/1.3

At-Rest Encryption: AES-256

Audit Trail: Comprehensive signing metadata

Regulatory Certifications: SOC 2 Type II, ISO 27001

Health Data: HIPAA compliant (BAA required)

eSignature Law: ESIGN and UETA support

Key Risks and Contractual Exposure

Cost Overruns: Owner bears variable costs

Disallowed Costs: Poor definitions invite disputes

Audit Adjustments: Insufficient backup can reduce payments

Delay Claims: Ambiguous schedules create claims

Tax Consequences: Incorrect classification affects deductions

Termination Exposure: Termination payments can be contentious

Common Preparation Mistakes to Avoid

Using vague cost language that leaves room for inconsistent billing and later audit disputes.
Failing to require original invoices and payroll records, which weakens auditability and may trigger disallowed costs.
Neglecting to define the fee base clearly (e.g., whether subcontractor pass-throughs are fee-bearing).
Skipping a documented change-order approval process, which creates retrospective approval disputes and payment delays.

Real-World Use Cases

Examples illustrate how parties adapt Cost Plus contracts to practical project conditions.

Early-Phase Renovation

A developer hires a contractor on cost-plus to begin demolition before design completion

This rewards transparency with monthly invoicing
The owner retains audit rights and a negotiated fee cap to limit exposure while enabling fast mobilization.

Public Utility Repair

A municipality uses a cost-plus contract for urgent infrastructure repair

Contractor documents time and materials daily
The contract requires government audit access and federal compliance clauses for prevailing wages and bonding, speeding emergency repairs with oversight.

Key Timing and Processing Expectations

Establish and track payment, invoice submission, and audit timeframes in the contract to avoid disputes and statutory penalties.

Invoice Submission:

Specify monthly or milestone invoice dates and required backup documentation

Owner Review Period:

Set a firm review window (e.g., 14–30 days) for disputes or objections

Final Accounting:

Define the closeout period for final audit and adjustments after project completion

Statutory Notices:

Observe state preliminary notice or lien deadlines that affect rights

Record Retention:

Maintain records per retention timeline and jurisdictional requirements

eSignature Vendor Comparison for Signing and Tracking Contracts

Compare typical vendor starting prices and feature availability for document signing and secure recordkeeping. signNow appears first per platform comparison conventions.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting Price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free Trial	7-day free trial	Varies by plan	Varies by plan	Varies by plan	Varies by plan
Bulk Send	Yes	Yes	Yes	Yes	Yes
Audit Trail	Yes	Yes	Yes	Yes	Yes
Envelope Cap	No cap	100 envelopes/user/year	Varies by plan	Varies by plan	Varies by plan

Frequently Asked Questions About Cost Plus Construction Contracts

Answers to common legal, administrative, and eSigning questions encountered when preparing and managing cost-plus agreements.

Need help? Contact support

What counts as an allowable cost?
Allowable costs must be defined in the contract and typically include direct labor, materials, subcontractor invoices, equipment rental, and permits. Exclusions should be explicit to avoid audit disputes; require original receipts and payroll records as supporting evidence.
How are change orders handled?
Require written change orders before changed work proceeds. Each change order should state scope, cost method, schedule impact, and required approvals; this prevents retroactive claims and preserves the agreed fee calculation.
Can the contract be signed electronically?
Yes. Electronic signatures are enforceable under the ESIGN Act (15 U.S.C. §7001) and state UETA statutes where adopted. Ensure the eSignature process captures intent, consent, attribution, and retention for legal validity.
What records are required for audits?
Maintain invoices, payroll, timecards, subcontractor agreements, material delivery receipts, and bank records. Specify in the contract the audit period and the format for producing records to the owner or an independent auditor.
How to limit owner exposure to cost overruns?
Use a guaranteed maximum price (GMP) addendum, set caps on reimbursable costs, require prior approval for major purchases, and include regular cost reporting to detect trends early.
What happens on contract termination?
Define termination compensation: allow payment for allowable costs incurred plus fee for work performed, specify return of unearned advance funds, and outline final accounting and audit rights for a defined post-termination period.

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