Probationary periods are permitted in Colorado and are commonly used to assess a new employee’s performance, suitability, and fit for the role during the initial stages of employment.

However, a probationary period does not remove an employee’s legal rights or change the at-will nature of the employment relationship. Employees remain protected by applicable wage and hour laws, anti-discrimination protections, leave entitlements, and other employment rights throughout the probationary period. Completion of a probationary or introductory period does not, by itself, alter an employee’s at-will status unless the parties expressly agree otherwise in writing.

Employers should also ensure that any probationary period terms are clearly communicated in employment documentation and workplace policies.

Are probationary periods legal in Colorado?

Yes. Employers in Colorado can use probationary, introductory, or evaluation periods for new hires to assess performance, conduct, attendance, skills, and overall suitability for the role.

These periods are often used to assess performance, conduct, attendance, skills, training progress and overall fit. They can last 30, 60, 90 or 180 days, depending on the role and the employer’s operating model.

A probationary period should not imply that employment becomes guaranteed after completion. This is one of the most important drafting points for employment contracts in Colorado, because unclear wording can create an expectation of continued employment.

If the role is at-will, the agreement should say the employee remains at-will during and after the probationary period. Passing probation should not be described as becoming “permanent” unless the employer intends to create a different legal relationship.

The phrase “probationary” can also be misunderstood. Many employers prefer “introductory period” because it avoids suggesting that employees have fewer legal rights during the first stage of employment.

Employers should also avoid using probation as a substitute for proper performance management. If a new employee is struggling, managers should still document concerns clearly, explain expectations and give practical feedback. That record helps show that decisions were based on performance rather than a protected reason.

What rights do employees have during a probationary period?

Probationary employees have the same core legal rights as other employees.

They must receive at least the applicable minimum wage. For 2026, Colorado’s state-wide baseline is 15.57 USD per hour, while Denver is 19.57 USD and Edgewater are 18.81 USD.

They may also have overtime rights, paid sick leave accrual, FAMLI rights, anti-discrimination protections and protections from retaliation. Probationary status does not allow an employer to ignore wage rules, deny protected leave or terminate for a discriminatory reason.

This means an employee who is still in an introductory period can still use accrued sick leave, report harassment, request a reasonable accommodation or raise a wage concern. The employer cannot treat those actions as signs that the worker has “failed” probation.

Contracts should make clear that probation is a performance review tool, not a waiver of statutory protections. This matters for contracts for hiring employees in Colorado, especially where managers outside HR may assume that probation gives the business wider dismissal rights than it actually does.

Probation should also be applied consistently. If one employee receives coaching and another is dismissed for the same issue without explanation, that inconsistency may create avoidable risk. Employers should use clear criteria and apply them evenly across comparable roles.

How should probationary periods be documented?

Probationary periods should be documented in the offer letter or contract.

The document should state the duration, purpose, review process and outcome options. It should also explain that completion does not guarantee continued employment.

For contracts for hiring employees in Colorado, probation wording should be aligned with at-will language. The contract should not say that the employee becomes “permanent” in a way that suggests dismissal protections.

A better approach is to state that the introductory period gives the employer and employee time to assess suitability, training progress and role expectations. The same clause should confirm that employment remains at-will unless a separate written agreement says otherwise.

Managers should also receive scripts for review meetings. Casual phrases like “you are safe now” or “you have passed and cannot be dismissed” can create avoidable disputes.

Documentation should include the start date, probation end date, review checkpoints, performance expectations and any extension process. If the employer may extend probation, the contract should explain when that can happen and whether the extension changes any rights.

Where the probation period ends successfully, the confirmation message should be carefully worded. It can recognise progress and confirm continued employment, but it should not promise future job security. For an employment contract for an at-will employee in Colorado, consistency is the priority: every document should reinforce that at-will status continues unless formally changed in writing.