{"id":95465,"date":"2026-04-29T10:37:30","date_gmt":"2026-04-29T09:37:30","guid":{"rendered":"https:\/\/invoicefly.com\/?p=95465"},"modified":"2026-04-29T10:39:20","modified_gmt":"2026-04-29T09:39:20","slug":"contratos-de-construccion","status":"publish","type":"post","link":"https:\/\/invoicefly.com\/es\/academy\/construction-contracts\/","title":{"rendered":"Explicaci\u00f3n de los contratos de construcci\u00f3n: Gu\u00eda completa para contratistas"},"content":{"rendered":"\t\t
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A construction contract is the agreement that sets the ground rules for a building or renovation project. It defines the scope of work, the price, the timeline, and who\u2019s responsible for what from start to finish. A good contract also explains how changes are handled, when payments are due, and what happens if delays or disputes come up. For contractors, subcontractors, and small construction business owners, understanding the main types of construction contracts \u2014 and what to include in them \u2014 helps protect your margins, reduce risk, and keep projects running smoothly. <\/p>\n\n\n\n

In this guide, we\u2019ll walk through what construction contracts are, the most common types you\u2019ll see on real jobs, and how to choose the right structure for your next project.<\/p>\n\n\n\n

\"Contractor<\/figure>\n\n\n\n

What Are Construction Contracts?<\/strong><\/h2>\n\n\n\n

A construction contract is a formal agreement between a project owner and a contractor \u2014 or between a general contractor and a subcontractor \u2014 that defines the terms under which construction work will be performed and paid for. It’s the legal foundation of every project, large or small.<\/p>\n\n\n\n

Without a written contract, disputes over scope creep, payment delays, and incomplete work are far more likely and far harder to resolve. For contractors just getting started, our guide on how to start a construction company<\/a> covers the full business setup process, including the role contracts play in building a professional operation.<\/p>\n\n\n\n

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Why Construction Contracts Are Important<\/strong><\/h2>\n\n\n\n

Construction projects involve significant money, time, and risk. A properly written contract manages all three by defining scope clearly, establishing payment terms, allocating risk between parties, providing a formal change order process, and creating legal recourse if something goes wrong.<\/p>\n\n\n\n

The Small Business Administration<\/a> (SBA) emphasizes that understanding contract terms and having solid agreement documentation is essential for any contractor seeking government or commercial project work.<\/p>\n\n\n\n

\"Contractor<\/figure>\n\n\n\n

8 Most Common Construction Contract Types<\/strong><\/h2>\n\n\n\n

Here are the most common types of contracts used in construction.<\/p>\n\n\n\n

1. Cost-Plus Contract<\/strong><\/h3>\n\n\n\n

The owner pays the contractor’s actual costs \u2014 labor, materials, equipment \u2014 plus an agreed fee for overhead and profit. Works well when scope isn’t fully defined, but the owner carries more financial risk since the final cost isn’t fixed.<\/p>\n\n\n\n

2. Design-Build Contract<\/strong><\/h3>\n\n\n\n

One entity handles both design and construction. This reduces disputes between designers and builders, often shortens the timeline, and works best when the owner wants a single point of responsibility.<\/p>\n\n\n\n

3. Guaranteed Maximum Price (GMP) Contract<\/strong><\/h3>\n\n\n\n

A cost-plus arrangement with a ceiling. The contractor is reimbursed for actual costs plus a fee, but only up to a defined maximum. If costs exceed that ceiling, the contractor absorbs the overage. Common on larger commercial projects.<\/p>\n\n\n\n

4. Incentive Construction Contract<\/strong><\/h3>\n\n\n\n

Part of the contractor’s compensation is tied to performance targets, such as completing ahead of schedule or under budget. These contracts align the contractor’s financial interest with the owner’s goals but require clearly defined, measurable targets.<\/p>\n\n\n\n

5. Integrated Project Delivery (IPD) Contract<\/strong><\/h3>\n\n\n\n

Owner, designer, and contractor operate under a single multi-party agreement from the project’s earliest stages, sharing risk and reward based on overall outcomes. Most common on large, complex projects, less so in residential or small commercial work.<\/p>\n\n\n\n

6. Lump-Sum Contract<\/strong><\/h3>\n\n\n\n

A single fixed price for the entire scope of work. Straightforward, gives owners complete cost certainty, and puts the risk on the contractor if costs run over. Accurate estimating is critical before signing. Use our free construction estimate template<\/a> to build detailed job cost breakdowns first.<\/p>\n\n\n\n

7. Time and Materials Contract<\/strong><\/h3>\n\n\n\n

Bills the owner for actual labor hours at agreed rates plus material costs, often with a markup. No fixed total \u2014 the final cost depends on how long the work takes. Well-suited to repair work or any job where the scope can’t be defined upfront.<\/p>\n\n\n\n

8. Unit Price Contract<\/strong><\/h3>\n\n\n\n

Sets a fixed price per unit of work (per cubic yard, linear foot, or square foot). The total value depends on final quantities completed. Common in civil construction, grading, and utility work where exact scope volumes are uncertain until work is underway.<\/p>\n\n\n\n

\"Project<\/figure>\n\n\n\n

9 Essential Construction Contract Elements<\/strong><\/h2>\n\n\n\n

No matter what type of construction contract you use, these core sections should always be included.<\/p>\n\n\n\n

#<\/strong><\/td>Element<\/strong><\/td>What It Covers<\/strong><\/td><\/tr>
1<\/td>The agreement<\/td>The signed document identifying both parties, the contract price, and the documents that form part of the contract<\/td><\/tr>
2<\/td>General conditions<\/td>Standard rules covering insurance, payment procedures, dispute resolution, and responsibilities of each party<\/td><\/tr>
3<\/td>Special conditions<\/td>Project-specific changes or additions to the general conditions<\/td><\/tr>
4<\/td>Scope of work (SOW)<\/td>Exactly what is included in the project \u2014 and what is excluded. A vague scope is one of the most common causes of disputes. See our guide on how to estimate construction jobs<\/a> for help building airtight scopes.<\/td><\/tr>
5<\/td>Construction drawings<\/td>Architectural, structural, and MEP plans referenced as part of the contract documents<\/td><\/tr>
6<\/td>Specifications<\/td>Required materials, workmanship standards, and installation methods<\/td><\/tr>
7<\/td>Project schedule<\/td>Start date, milestones, completion deadline, and delay procedures<\/td><\/tr>
8<\/td>Schedule of values<\/td>Breakdown of the contract price used to calculate progress payments. Our guide on retainage<\/a> explains how funds are withheld and released through this process.<\/td><\/tr>
9<\/td>Bill of quantities<\/td>Itemized labor, materials, and costs supporting pricing and change orders<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Which Contract Is Right for Your Job?<\/strong><\/h2>\n\n\n\n