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Project Management GMP Amendment

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PROJECT MANAGEMENT GMP AMENDMENT

This Guaranteed Maximum Price Amendment (the "Amendment") amends the original contract entitled dated between Client Name: and Service Provider: . This Amendment is effective as of .

Project Identification

Amendment Scope of Work

The parties agree the Scope of Work under the original Agreement is amended as follows. The Service Provider shall perform the additional work described below in accordance with the Agreement terms, unless expressly superseded by this Amendment.

Deliverables and Acceptance Criteria

The following deliverables are added or modified by this Amendment. Each deliverable is subject to the acceptance criteria set forth below. Acceptance shall be in writing and may not be unreasonably withheld.

Timeline and Milestones

Milestones (enter key milestones affected)

Target Date:

Target Date:

Target Date:

Budget, GMP Adjustment & Payment Schedule

All payments made under this Amendment shall be subject to the same conditions precedent, withholding, and rights of offset as set forth in the original Agreement unless expressly modified in writing herein.

Change Order and Authorization Process

Except as otherwise provided in this Amendment, any changes to scope, cost, or schedule must follow the Contract change order process. No additional work shall commence until a written change order has been fully executed by authorized representatives of both parties. If the parties agree to an emergency change required to avoid imminent harm, the Service Provider shall notify the Client in writing within two business days and shall obtain retroactive written approval as soon as practicable.

Acceptance Testing, Warranties and Deliverable Acceptance

Deliverables shall be subject to inspection and acceptance testing as set forth in the original Agreement and this Amendment. The Client shall provide written notice of acceptance or rejection within a reasonable period not to exceed ten (10) business days following delivery of each deliverable, unless otherwise set forth in an acceptance schedule above. Service Provider warrants that all work performed pursuant to this Amendment shall conform to agreed specifications and industry standards for a period of ninety (90) days from acceptance unless a different warranty period is provided in the Agreement.

Confidentiality

All confidential information exchanged in connection with this Amendment is subject to the confidentiality provisions of the original Agreement. Each party shall use confidential information solely for performance under this Amendment and shall protect such information with at least the same degree of care it uses to protect its own confidential information, but in no event less than reasonable care.

Indemnification and Liability

Each party's indemnification obligations under the original Agreement remain in full force and effect and apply to claims arising from the work performed under this Amendment. Except as expressly provided herein, no party shall be liable for consequential, incidental, or special damages, and any caps on liability in the original Agreement shall apply to this Amendment.

Governing Law

This Amendment shall be governed by and construed in accordance with the laws of without regard to conflict of law principles.

Notices

Notices required or permitted under this Amendment shall be sent to the addresses below or to such other addresses as either party designates in writing in accordance with the Agreement.

Miscellaneous

Except as expressly modified by this Amendment, all terms and provisions of the original Agreement remain unchanged and in full force and effect. In the event of any conflict between the terms of the original Agreement and this Amendment, the terms of this Amendment shall govern.

IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by their duly authorized representatives.

Client

Printed Name:

By:

Date:

Service Provider

Printed Name:

By:

Date:

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What the Project Management GMP Amendment Is

A Project Management GMP Amendment is a written modification to an existing construction or project management agreement that adjusts the Guaranteed Maximum Price (GMP), scope, schedule, or terms governing cost risk. It documents agreed changes to contract value and responsibilities, establishes new payment and milestone terms, and preserves the original contract’s baseline while creating an auditable record of negotiated adjustments among owner, contractor, and project manager.

Why a Formal GMP Amendment Matters

A clear, executed GMP amendment preserves cost certainty, assigns risks, and prevents disputes by recording scope changes, contingency use, and revised completion dates. It creates enforceable rights and a traceable decision history for owners, contractors, and lenders.

Why a Formal GMP Amendment Matters

Who Typically Prepares and Signs This Amendment

Each signer should have authority to bind their party; distribution typically goes to owner, contractor, architect, and the project file.

  • Owner representatives and project controls teams who authorize budget and scope adjustments for the project.
  • General contractors or construction managers responsible for updated cost estimates and schedule impacts.
  • Design professionals and project managers who confirm scope, milestones, and technical implications.

Typical Signatories and Their Roles

Project Manager

A project manager ensures the amendment aligns with the project schedule, change orders, and cost control procedures. They confirm technical impacts and communicate revised milestones to stakeholders, maintaining the project baseline and risk register during implementation.

Authorized Owner

An owner or owner representative with contract authority approves GMP adjustments and funding changes. Their signature confirms budget availability, acceptance of revised contingencies, and direction to proceed under the amended GMP terms.

Core Elements to Include in a Professional GMP Amendment

A well-drafted amendment is specific, measurable, and linked to the original contract; include references, amounts, dates, and responsibilities to prevent future disputes.

Reference Clause

Cite the original contract by title, date, and section to make the amendment legally part of the main agreement and avoid ambiguity about which provisions are modified.

Revised GMP Amount

State the previous GMP, the proposed adjustment, the new total GMP, and whether changes consume contingency or require new funding, including currency and rounding rules.

Scope Changes

Describe added or deleted work with sufficient detail or attached exhibits so cost and schedule impacts are traceable and measurable for change order accounting.

Schedule Adjustments

Specify new milestone dates, critical path impacts, and liquidated damages adjustments, plus responsibilities for acceleration or delay mitigation.

Payment Terms

Explain invoicing, retainage, milestone payments, and any holdbacks linked to the amended GMP, including submission and approval processes.

Risk Allocation

Document which party assumes new cost or performance risks, insurance changes, bonding adjustments, and indemnity modifications related to the amendment.

Required Amendment Data Elements

Contract Reference: Original contract ID
Parties: Owner and contractor names
GMP Figures: Old and new totals
Effective Date: MM/DD/YYYY
Scope Summary: Change description
Signatures: Authorized signers

Step-by-Step: Executing a GMP Amendment

Follow these steps to prepare, approve, and document a GMP amendment while preserving compliance and auditability.

  • 01
    Draft Amendment: Prepare text referencing original contract and describing changes.
  • 02
    Cost Verification: Attach supporting estimates, change orders, and pricing backup.
  • 03
    Review & Approval: Obtain approvals from finance, legal, and project leadership.
  • 04
    Execute and Distribute: Collect signatures and circulate executed copies to stakeholders.

Configuring an Online Amendment Workflow

Set up a digital workflow that enforces fields, signer order, and required attachments before execution.

Field Configuration
GMP Amount Fields Require numeric validation and two-step review
Attachment Field Require supporting estimates before final signature
Signer Order Owner first, contractor next, then architect
Audit Trail Enable IP, timestamp, and action logging

Where to Send the Executed Amendment

After execution, route copies to all parties, financial controllers, and the official project record.

  • Owner: File in contract administration and procurement systems
  • Contractor: Update internal cost control and job cost ledgers
  • Architect/Engineer: Document scope and drawing revisions
  • Project File: Store executed PDF in centralized project repository

Technical Considerations for Digital Execution

Ensure chosen tools meet contract retention, access controls, and any industry compliance needs before executing high-value amendments.

  • File Formats: PDF, DOCX supported
  • Integrations: Salesforce, NetSuite, signNow
  • Authentication: Email OTP, SMS, KBA options

Typical Timing and Notice Requirements

Track notice windows, payment dates, and permit milestones to ensure the amendment’s obligations align with project schedules.

Effective Date:

Date the amendment becomes enforceable

Notice Period:

Contract-specified days for claims or adjustments

Invoicing Milestones:

Dates tied to payment and retainage release

Permit Deadlines:

Dates to submit revised permit documentation

Record Filing:

Date copies are archived in project records

Common Preparation Mistakes to Avoid

  • Vague scope descriptions that create ambiguity and disputes over deliverables and pricing.
  • Failing to attach supporting cost backup, which undermines approval and auditability for budget controllers.
  • Using unsigned or improperly authorized signatures that risk unenforceability and contract noncompliance.
  • Not updating project schedules or procurement documents to reflect amended milestones and obligations.

Key Risks and Potential Consequences

Breach Claims: Contract damages risk
Payment Delays: Cashflow and lien exposure
Permit Noncompliance: Fines or work stoppage
Bonding Issues: Surety disputes possible
Tax Reporting: Incorrect records risk penalties
Record Gaps: Weakened enforceability

Practical Examples of GMP Amendment Usage

Two concise scenarios illustrate typical amendment triggers and outcomes.

Unforeseen Site Conditions

An excavation change required redesign and extra work

  • Added $250,000 to GMP after bids
  • The amendment documented scope, updated schedule by 30 days, and established milestone payments tied to new work.

Scope Reduction

Owner deferred selected finishes to reduce cost

  • GMP decreased by $120,000 after agreement
  • Amendment revised specifications, adjusted retainage schedule, and preserved contractor warranties for completed work.

eSignature Vendor Pricing Snapshot for Amendment Execution

Compare typical starting prices, trial availability, bulk send, audit trail, HIPAA support, and envelope caps across common eSignature providers.

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 Varies Varies Varies
Bulk Send Yes Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No
Envelope Cap No cap 100 env/user/yr Varies Varies Varies

Practical Tips for Accurate and Efficient Amendments

Adopt consistent processes to reduce errors and speed approvals when modifying GMP contracts.

Use Clear, Measurable Language
Define scope with measurable deliverables and attach drawings or exhibits so the amendment cannot be interpreted inconsistently during performance or audit.
Attach Supporting Documents
Include cost estimates, approvals, and change orders as exhibits to create an auditable trail and speed financial approvals.
Confirm Signatory Authority
Validate each signer has documented authority to bind their organization; obtain corporate resolutions if required for large sums.
Record Distribution
Distribute executed copies to project controls, finance, legal, and the official project repository for future reference.

Frequently Asked Questions about GMP Amendments

Answers to common questions on validity, e-signatures, notarization, revocation, and recordkeeping for GMP amendments.


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