Types of Employment Contracts: Which One Fits?

Not every employment contract is the same. Depending on the duration of the job, the hours involved and the flexibility required, different forms apply — and each comes with its own rules, rights and obligations. Whether you're hiring or being hired, it pays to know the main types of employment contracts so you can choose the right one.

This overview introduces the common types of employment contracts — from the open-ended standard case through fixed-term and part-time contracts to casual and agency work. For a fuller explanation of what an employment contract is and what it must contain, see our guide What is an employment contract?.

Overview: What Types of Employment Contracts Are There?

Employment contracts can be distinguished by two criteria: by duration (permanent or fixed-term) and by hours (full-time, part-time, casual). On top of these sit special forms such as agency work. The main forms at a glance:

• Permanent (open-ended) contract – the standard case, with no end date.
• Fixed-term contract – ends automatically at a set point in time.
• Part-time contract – with reduced working hours.
• Casual / on-call work – worked as needed, without fixed weekly hours.
• Agency / temporary work – the worker is supplied to a third-party business.

Permanent (Open-Ended) Contract

The permanent, open-ended contract is the standard form of employment in most jurisdictions. It runs without a fixed end date and ends only through resignation, dismissal, a settlement agreement or retirement. For employees it offers the greatest security; for employers, planning certainty and the ability to retain skilled staff.

Where no valid ground for a fixed term exists, or a fixed term has not been properly agreed, the relationship is generally treated as permanent by default.

Fixed-Term Contract

A fixed-term contract ends automatically at a set date or when an agreed purpose is reached — without the need for notice. In many jurisdictions a fixed term must be agreed in writing to be effective; otherwise a permanent relationship can arise. Two broad forms are common:

• Fixed term without a material reason – permitted up to a maximum total duration and number of renewals set by local law, and usually only on a genuinely new hire rather than a re-engagement with the same employer.
• Fixed term with a material reason – for example to cover an absence (parental leave, illness), for a time-limited project, for seasonal work, or for a trial. Where a valid reason exists, longer terms and multiple renewals are typically possible.

For employees a fixed term means less planning certainty; for employers it is a flexible tool for temporary or fluctuating demand. When the term ends, the relationship can be extended or converted into a permanent contract.

Part-Time Contract

A part-time contract differs from a full-time one only in its reduced hours. Part-time employees are generally entitled to the same treatment as full-time staff — pay, leave and other benefits are simply granted on a pro-rata basis. Treating someone less favourably purely because they work part-time is generally not permitted.

Many jurisdictions also give employees, under certain conditions, a right to request reduced hours — sometimes for a fixed period with a right to return to full-time afterwards.

Casual / On-Call Work

Under casual or on-call work, the parties agree no fixed hours — the employee is deployed as work arises. This offers maximum flexibility but is usually limited by law: where no weekly working time is set, a statutory minimum is often deemed agreed, and the employer typically has to give reasonable advance notice of each shift. The model is common in sectors with strongly fluctuating demand, such as hospitality and retail.

Agency / Temporary Work

In agency work — also called temporary or contract staffing — the worker signs with a staffing agency but performs the work at a client business. This triangular arrangement is regulated in most jurisdictions, often with rules on maximum assignment duration and on equal treatment (equal pay) relative to the client's own staff.

Which Type of Contract Fits?

The right form depends on the specific need:

• Ongoing staffing need → permanent contract.
• Temporary or project-based need → fixed-term contract.
• Reduced hours → part-time or casual contract.
• Short-term peaks or cover → agency or on-call work.

Whatever the form, every employment contract must contain the essential terms and should set out the key clauses clearly. To play it safe, start with a vetted employment contract template.