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Contrato de Trabajo Indefinido, page 1
Complex · 68/100Form Complexity Index

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What this form asks for

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The Contrato de Trabajo Indefinido is the standard legal agreement in Spain for hiring an employee on a permanent basis. It outlines the essential terms of employment, including job role, working hours, salary, and vacation, while also providing specific clauses for various protected groups like individuals with disabilities or victims of gender violence. This contract is crucial for ensuring legal compliance and registering the employment with the Public Employment Service (SEPE). Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields253
Pages19
Sections14
Questions that depend on earlier answers2
Form Complexity IndexComplex, 68/100

The AI checks your answers before you download

14 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Validates the format of Spanish Identification Numbers (NIF/NIE/CIF)

This check verifies that the values entered in the 'CIF/NIF/NIE' fields for the company, its representative, and the worker adhere to the official Spanish format algorithms. This includes checking the structure, length, and the validity of the final control character. Correct identification numbers are essential for legal validity, tax reporting, and social security registration, and failure to provide a valid number would prevent the contract from being officially registered.

Verifies Worker's Date of Birth and Legal Working Age

This validation ensures the 'FECHA NACIMIENTO' is a valid date in DD/MM/AAAA format and that it is in the past. It also calculates the worker's age as of the contract start date to confirm they meet the minimum legal working age in Spain. This is a critical compliance check to prevent child labor and ensure the contract is legally enforceable. If the worker is underage, the system should flag the submission for review or require the legal guardian's details to be completed.

Ensures Social Security Contribution Account Code (CCC) Format is Correct

This check validates that the 'CÓDIGO CUENTA DE COTIZACIÓN' follows the specific 11-digit structure required by the Spanish Social Security system (2 digits for province, 7 for the number, and 2 control digits). An incorrect CCC would lead to failures in processing social security contributions for the employee, causing significant administrative and legal issues for the employer. The validation prevents submission until the format is correct.

Validates the Worker's Social Security Number Format

This check ensures the 'Nº SEGURIDAD SOCIAL' field contains a number that conforms to the official Spanish format, which typically includes a province code, an assigned number, and control digits. This number is unique to each worker and is fundamental for tracking their employment history, contributions, and access to benefits. An invalid number would prevent the worker from being correctly registered under the employer's account.

Enforces Mutual Exclusivity of Workday Type Selection

This validation ensures that only one of the two main workday types in Clause 3, 'A tiempo completo' (Full-time) or 'A tiempo parcial' (Part-time), can be selected. These options are mutually exclusive. This check prevents ambiguity in the contract's core terms. If one is selected, the other should be disabled or cleared to avoid contradictory information.

Requires Specification of Hours for Part-Time Contracts

If 'A tiempo parcial' is selected in Clause 3, this check ensures that the number of hours is specified and that a corresponding time unit ('al día', 'a la semana', 'al mes', or 'al año') is also selected. A part-time contract is legally incomplete without a clear definition of the working hours. Failure to provide this information would render a key term of the contract void and prevent submission.

And 8 more checks
  • Validates Conditional Logic for Complementary Hours Pact
  • Requires Completion of Fixed-Discontinuous Clause (Cláusula Segunda)
  • Verifies Annual Vacation Days Meet Legal Minimum
  • Validates Percentage Range for Partial Retirement in Relief Contracts
  • Requires Legal Guardian Details for Minor Workers
  • Ensures Selection and Completion of a Specific Contract Clause
  • Validates Consistency Between Selected Clause and Contract Code
  • Requires Original Contract Details for a Conversion

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How to Fill Out Contrato Indefinido Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the 'Contrato de Trabajo Indefinido' form.
  2. Use the AI assistant to input the employer's details (DATOS DE LA EMPRESA), including company name, tax ID (CIF), and representative information.
  3. Provide the employee's personal and social security information (DATOS DE LA PERSONA TRABAJADORA), such as their NIF/NIE and address.
  4. Complete the main contract clauses (CLÁUSULAS), specifying the job position, work schedule (full-time, part-time, or fixed-discontinuous), salary, and start date.
  5. Select and fill out any applicable specific clauses (CLÁUSULAS ESPECÍFICAS) based on the employee's situation, such as for persons with disabilities, long-term unemployed, or other special conditions.
  6. Review all entered information for accuracy, then have all required parties (employer representative, employee, and legal guardian if applicable) sign the document.
  7. Download the completed and signed contract for your records and for submission to the Public Employment Service (Servicio PĂșblico de Empleo).

Common Mistakes in Completing Contrato Indefinido

The ones the AI is built to catch.

Incorrect or Incomplete Identification Numbers
Users frequently enter incorrect or improperly formatted identification numbers like the company's CIF, or the worker's NIF/NIE and Social Security Number. This often happens due to typos or not knowing the correct format, including the final letter. Such errors will cause the contract registration to be rejected by the Public Employment Service (SEPE) or the Social Security system, delaying the hiring process. To avoid this, double-check all numbers against official documents; AI-powered tools like Instafill.ai can automatically validate these formats to prevent submission errors.
Failure to Select the Specific Contract Type
On page 4, the user must select one specific type of indefinite contract from a list (e.g., 'INDEFINIDO ORDINARIO', 'PARA PERSONAS CON DISCAPACIDAD'). People often overlook this crucial step, leaving the contract's legal framework undefined. This omission makes the contract invalid for registration and can lead to the loss of specific legal benefits or bonuses associated with the intended contract type. Always ensure one, and only one, box is checked on this page to define the contract's specific clauses.
Using the Wrong Contract Code
Each specific contract type (pages 5-18) has a table with 'CÓDIGO DE CONTRATO' based on the work schedule (full-time, part-time, fijo-discontinuo). These codes (e.g., 100, 200, 130, 350) are critical for the administration but are easily confused. Choosing the wrong code is a major administrative error that leads to incorrect registration with social security, affecting contribution calculations and eligibility for incentives. Carefully match the employee's situation and work schedule to the correct code in the corresponding table.
Inconsistent Work Schedule Information
In 'CLÁUSULA TERCERA', users often make conflicting entries, such as checking both 'A tiempo completo' and 'A tiempo parcial', or failing to specify the number of hours and their distribution. This ambiguity about the core working conditions can lead to future labor disputes and payroll errors. It is essential to select only one work schedule type and complete all associated fields, such as weekly hours for full-time or the hourly count and period (day, week, month, year) for part-time.
Incorrectly Filling the 'Fijo-Discontinuo' Clause
Clause 'SEGUNDA', which applies only to permanent-discontinuous contracts, is frequently misunderstood. Users either fill it out for standard contracts or, when it does apply, they fail to properly define the 'duración estimada de la actividad' or the 'orden y forma' of call-ups. This can invalidate the specific legal nature of the 'fijo-discontinuo' arrangement, potentially reclassifying it as a standard indefinite contract and causing legal complications. This clause should only be completed if the contract is explicitly 'fijo-discontinuo'.
Entering Net Salary Instead of Gross
Clause 'QUINTA' explicitly asks for the total gross remuneration ('euros brutos'). A common mistake is to enter the employee's take-home pay (net salary), which is incorrect and leads to discrepancies in tax and social security calculations. Always specify the gross salary before deductions and indicate the pay period (e.g., 'mensuales' or 'anuales') to ensure the contract is legally sound and payroll is processed correctly.
Forgetting to Sign All Pages
The form includes a prominent instruction on the final page stating that all completed pages must be signed in the left margin for 'mayor seguridad jurídica'. This requirement is very often missed, with parties only signing the final page. Failing to do so can weaken the contract's legal standing in case of a dispute. To prevent this, make it a final checklist item to initial or sign the margin of every single page that contains filled-in information.
Omitting Details of Required Certifications
Many of the special contract clauses (e.g., for disability, social exclusion) require proof from an official body and include a line to specify the issuing authority. People often leave this blank or forget to attach the corresponding certificate. Without this information and the supporting document, the company cannot claim the associated bonuses ('bonificaciones') or subsidies, resulting in a significant financial loss. Ensure the certifying body is named and the official document is ready for submission.
Confusing Company's Legal Address with Work Center
The form distinctly asks for the company's registered legal address ('Domicilio Social') on page 1 and the employee's physical work location ('Centro de trabajo') in 'CLÁUSULA PRIMERA'. Users sometimes input the same address for both, even when they differ. This can lead to incorrect application of regional labor laws, collective agreements, or tax obligations. It is crucial to accurately provide both addresses as they serve different legal and administrative purposes.
Invalid Date Format
The form specifies the date format as 'dd/mm/aaaa', particularly for the employee's date of birth. However, users accustomed to other conventions might enter it as MM/DD/YYYY or use hyphens instead of slashes. This seemingly minor error can cause data entry failures when the contract is processed by government software, leading to delays. Using an AI form-filler like Instafill.ai can help by automatically formatting dates correctly, and it can also make the non-fillable PDF sections of this form interactive.

Frequently Asked Questions About Contrato Indefinido

 

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This plan is for your Contrato Indefinido: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
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How does the AI fill out Contrato Indefinido?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of Contrato Indefinido, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is Contrato Indefinido to fill out?
Contrato Indefinido has a Form Complexity Index of 68 out of 100, in the complex tier: 253 fillable fields across 19 pages. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of this form?
This form is a standard template for a Spanish Indefinite Employment Contract ("Contrato de Trabajo Indefinido"). It is used to formalize a permanent employment relationship between a company and a worker, outlining all the terms and conditions of employment.
Who needs to fill out this contract?
Both the employer (or their legal representative) and the employee must complete and sign this contract. If the employee is a minor, their legal guardian must also sign.
What are the 'Cláusulas Específicas' pages for?
These pages (from page 5 onwards) are for specific hiring situations that may entitle the employer to social security bonuses or subsidies. You only need to complete the page that applies to your specific situation, such as hiring a person with a disability, a long-term unemployed person, or converting a temporary contract.
What information do I need to have ready to complete this form?
You will need the company's details (CIF, social security account code), the work center's address, and the employee's personal information (NIF/NIE, social security number, date of birth, address, and educational level). You will also need details about the job, such as the professional group, salary, and work schedule.
What is the difference between a 'tiempo parcial' and a 'fijo-discontinuo' contract?
A 'tiempo parcial' (part-time) contract has a regular work schedule but fewer hours than a full-time equivalent. A 'fijo-discontinuo' contract is for permanent workers who perform cyclical or intermittent work, meaning they only work during specific seasons or periods of activity each year.
Where and when do I submit this contract after it's signed?
According to Clause 11, the contract must be communicated to the corresponding Public Employment Service (Servicio PĂșblico de Empleo) within 10 business days of its formalization.
How do I know if the company is eligible for the social security bonuses mentioned in the form?
Eligibility for bonuses depends on the specific type of contract and the worker's circumstances, as detailed in the 'ClĂĄusulas EspecĂ­ficas' sections. You must meet the requirements outlined in the corresponding Royal Decrees and Laws cited in the form, and often need official certification for the worker's condition (e.g., disability, victim status).
When should the 'DATOS DE LA ASISTENCIA LEGAL' section be filled out?
This section should be completed only if a legal representative, such as a parent or guardian for a minor worker, is involved in signing the contract. You would enter the representative's details here.
The form says all pages must be signed. Where exactly do we sign?
The main signatures from the company representative, the worker, and any legal guardian go on the final page. Additionally, the instructions state that for greater legal security, all completed pages of the contract should be signed in the left margin.
Can an AI tool help me fill out this complex contract?
Yes, AI-powered services like Instafill.ai can help you fill out this form accurately and efficiently. These tools use AI to recognize form fields and can auto-fill your information, saving you time and reducing the risk of errors.
How can I use Instafill.ai to fill this form online?
Simply upload the contract PDF to the Instafill.ai platform. The AI will automatically identify all the fields, which you can then fill out online through an easy-to-use interface, saving your progress as you go.
The PDF version of this contract I have is not fillable. What can I do?
You can use a service like Instafill.ai to solve this problem. Instafill.ai can convert flat, non-fillable PDFs into interactive, fillable forms, allowing you to type your information directly into the fields.
What are the 'CÓDIGO DE CONTRATO' numbers on the specific clause pages?
These are official codes used by the Public Employment Service to classify the type of contract. For example, '100' is for a standard full-time indefinite contract, while '130' is for an indefinite contract for a person with a disability, helping to automate processing and the application of any corresponding bonuses.
What should I write in the 'Retribución total' (Total Remuneration) field in Clause 5?
In this field, you must specify the total gross salary the worker will receive and the period it covers (e.g., annual, monthly). You should also break down this total into its different components, such as base salary and any additional pay ('complementos salariales'), in the space provided.
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