Negotiating Payment Terms in Energy Performance Contracts: Shared Savings vs. Guaranteed Savings Models

21-Nov-25
7 mins
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Negotiating Payment Terms in Energy Performance Contracts: Shared Savings vs. Guaranteed Savings Models

Energy performance contracts have become a critical tool for organizations looking to reduce operating costs and meet sustainability goals without significant upfront capital investment. These agreements allow building owners and facility managers to implement energy efficiency improvements while the energy service company (ESCO) assumes much of the financial risk. However, the payment structure you choose can dramatically affect your project's success, cash flow, and long-term value.

Understanding the difference between shared savings and guaranteed savings models is essential for anyone responsible for negotiating these agreements. Each approach distributes risk, rewards, and responsibilities differently between your organization and the ESCO. The right choice depends on your financial position, risk tolerance, and operational priorities.

Understanding Shared Savings Models

In a shared savings arrangement, the ESCO typically finances the energy efficiency improvements and receives a percentage of the actual energy savings achieved over a specified contract period. This model transfers most of the performance risk to the ESCO, since their compensation depends directly on realized savings.

The ESCO usually covers the upfront costs of equipment, installation, and commissioning. In return, they receive an agreed-upon percentage of the savings, often ranging from 50% to 90%, for a contract term that typically spans 5 to 20 years. Your organization benefits from immediate energy cost reductions without capital expenditure, while the ESCO recovers their investment through the savings stream.

This payment structure works well when your organization has limited capital for energy projects or prefers to avoid debt financing. It also makes sense when you want the ESCO to remain highly motivated to ensure equipment performs optimally throughout the contract term, since their revenue depends on continued savings.

However, shared savings models require careful attention to measurement and verification protocols. You need clear baseline energy consumption data and agreed-upon methods for calculating savings. Without robust measurement systems, disputes can arise about whether savings targets have been met and how much the ESCO should be paid.

Guaranteed Savings Models Explained

Guaranteed savings contracts shift the financial structure significantly. Under this model, the ESCO guarantees a minimum level of energy savings, but your organization typically secures financing for the project through a bank, leasing company, or internal funds. The ESCO's guarantee means they must compensate you if savings fall short of the promised amount.

This approach appeals to organizations with access to capital or favorable borrowing rates. Since you finance the improvements directly, you retain all the energy savings from day one rather than sharing them with the ESCO. The ESCO receives payment for their design, installation, and project management services upfront or through a payment schedule, rather than through a percentage of ongoing savings.

The guaranteed savings model provides greater financial predictability. You know exactly what your debt service or payment obligations will be, and you can budget confidently knowing the ESCO has contractually committed to minimum savings levels. If equipment underperforms, the ESCO must make up the difference, protecting your ability to cover financing costs.

When negotiating guaranteed savings performance contracts, pay close attention to how the guarantee is structured. Some ESCOs limit their liability to the difference between guaranteed and actual savings, while others may cap their total financial exposure. Understanding these limits helps you assess the true value of the guarantee.

Key Negotiation Considerations for Both Models

Regardless of which payment structure you select, several contract terms require careful negotiation. The baseline period establishes your current energy consumption patterns and forms the foundation for all savings calculations. Ensure this period represents typical operations and accounts for any unusual circumstances that might skew data.

Measurement and verification protocols must be detailed and mutually agreed upon. These procedures determine how savings will be calculated, what data will be collected, and how often performance will be assessed. Industry standards like the International Performance Measurement and Verification Protocol provide useful frameworks, but you should customize them to your specific situation.

The contract term significantly affects your total cost and benefits. Longer terms may allow the ESCO to recover their investment at lower annual costs to you, but they also lock you into a relationship that may become less favorable as technology evolves or your operational needs change.

Consider including provisions for early termination or buyout options. These clauses give you flexibility if your circumstances change, though they typically require you to compensate the ESCO for unrecovered costs. When structuring complex arrangements involving contractors and subcontractors, reviewing templates like a Main Contractor And Subcontractor Agreement can help ensure all parties' obligations are clearly defined.

Risk Allocation and Performance Guarantees

Risk allocation differs substantially between the two models. Shared savings contracts place performance risk primarily on the ESCO, since they only profit when savings materialize. This alignment of interests can be advantageous, but it may also lead to conservative estimates and less aggressive efficiency measures.

Guaranteed savings models transfer more performance risk to the ESCO through their guarantee, but they place financing risk on your organization. You must ensure that debt service or payment obligations fit within your budget, even if savings slightly underperform in the short term.

Performance guarantees should address several scenarios:

  • What happens if savings fall short due to equipment failure or poor performance
  • How operational changes in your facility affect savings calculations
  • Whether the ESCO's liability extends to consequential damages or is limited to direct shortfalls
  • How disputes about savings calculations will be resolved

Financial and Tax Implications

The payment structure you choose affects your financial statements and tax position. Shared savings arrangements may be treated as operating expenses, keeping the project off your balance sheet. This can be attractive for organizations concerned about debt ratios or capital constraints.

Guaranteed savings models typically involve capital expenditures that appear on your balance sheet, though the assets may qualify for accelerated depreciation or tax credits. Consult with your financial advisors to understand how each structure affects your specific tax situation and financial reporting requirements.

Some organizations use financial instruments like an Open Bank Guarantee to secure the ESCO's performance obligations, particularly in guaranteed savings contracts. These instruments provide additional assurance that the ESCO can fulfill their guarantee if savings fall short.

Operational Flexibility and Control

Consider how each payment model affects your operational flexibility. Shared savings contracts often give the ESCO significant control over equipment operation and maintenance, since their revenue depends on optimal performance. This can be beneficial if you lack in-house expertise, but it may limit your ability to modify operations or integrate new systems.

Guaranteed savings models typically provide more operational control once the project is complete. After the ESCO has installed equipment and provided initial training, you assume responsibility for ongoing operation and maintenance. This gives you greater flexibility but also requires adequate internal capabilities.

Selecting the Right Model for Your Organization

Your choice between shared savings and guaranteed savings should reflect your organization's financial position, risk tolerance, and strategic objectives. Shared savings models work well when you have limited capital, prefer to transfer performance risk, or want the ESCO to remain engaged throughout the contract term.

Guaranteed savings models suit organizations with access to favorable financing, those wanting to retain all savings from the outset, or those with strong internal capabilities to operate and maintain energy systems. This structure also appeals to public sector entities that may have restrictions on revenue-sharing arrangements.

Some organizations negotiate hybrid structures that combine elements of both models. For example, you might secure financing for major equipment purchases while sharing savings from operational improvements, or structure payments that transition from shared savings to guaranteed savings after an initial period.

Whichever model you select, invest time in thorough due diligence before signing. Review the ESCO's track record, financial stability, and technical capabilities. Ensure contract terms clearly define all parties' obligations, including maintenance responsibilities, insurance requirements, and procedures for handling disputes.

Performance contracts represent significant long-term commitments that can deliver substantial benefits when structured properly. By carefully evaluating shared savings versus guaranteed savings models and negotiating terms that align with your organization's needs, you can implement energy efficiency improvements that reduce costs, meet sustainability goals, and provide lasting value.

When should you choose a shared savings model over guaranteed savings in energy contracts?

A shared savings model works best when your organization has limited upfront capital or prefers to minimize financial risk. In this structure, the energy service provider assumes most of the project costs and performance risk, making it ideal for organizations with tight budgets or uncertain cash flow. You should also consider shared savings when energy usage patterns are difficult to predict, as the provider shares in the actual savings achieved rather than guaranteeing a specific amount. This model suits organizations that value flexibility and want to align payment with real performance outcomes. However, keep in mind that while shared savings reduces your initial investment, you will typically share a larger percentage of energy savings with the provider over a longer contract period compared to guaranteed savings arrangements.

How do you structure baseline adjustments in performance contract payment terms?

Baseline adjustments account for changes in operating conditions that affect energy consumption but fall outside the contractor's control. Structure these adjustments by first establishing a clear baseline measurement period, typically 12 months of pre-installation energy use. Define specific triggers for adjustment, such as changes in facility square footage, operating hours, production volume, or weather conditions. Include a transparent calculation methodology that both parties can verify, often using industry-standard measurement and verification protocols. Set regular review intervals, typically annually, to assess whether adjustments are warranted. Document the adjustment process explicitly in your contract to prevent disputes and ensure accurate calculation of savings or guaranteed performance thresholds throughout the contract term.

What financial protections should you include when the energy service company finances your project?

When an energy service company finances your performance contracts, insist on robust financial protections to safeguard your organization. First, require clear performance guarantees backed by liquidated damages or payment reductions if promised energy savings are not achieved. Second, demand security instruments such as an Open Bank Guarantee to ensure the contractor can cover underperformance or default. Third, negotiate caps on your payment obligations and establish escrow accounts for disputed amounts. Include audit rights allowing independent verification of savings calculations, and require comprehensive insurance coverage naming your organization as an additional insured. Finally, ensure termination provisions permit exit with reasonable notice if savings targets consistently fail, protecting you from long-term financial exposure in underperforming arrangements.

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Written by

Will Bond
Content Marketing Lead

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