What is an employment contract?
An employment contract is a written agreement between an employer and a worker that sets the terms of the job: the role, pay, schedule, benefits, and each side's obligations. It turns a handshake into an enforceable record and protects both parties if a dispute comes up.
In nearly every state, employment is at-will by default, meaning either side can end it at any time for any lawful reason, and a well-drafted contract can preserve that at-will status while still fixing pay and adding protections. Because the rules that surround the contract, from final-pay deadlines to non-compete enforceability, are set by state law, the state directory below matters as much as the form itself.
When you need one
You put employment in writing whenever the relationship is more than casual: hiring a new employee and fixing pay, duties, and benefits; bringing on an executive with equity, bonus, or severance terms; or engaging a contractor, which is a different document from an employee agreement.
It is also the moment to add the protections a job creates, such as confidentiality, assignment of the intellectual property an employee produces, and, where the state allows it, restrictive covenants. Many hires begin with an offer letter that sets out the headline terms before the full agreement is signed.
Employee or independent contractor
The first decision, and the most consequential, is how the worker is classified, because it drives taxes, benefits, wage-and-hour rules, and which agreement you use. An employee works under the employer's direction and receives tax withholding and benefits, while an independent contractor runs their own business and is paid gross.
Getting it wrong is expensive: misclassification can trigger back taxes, unpaid overtime, and penalties. The IRS and the Department of Labor each apply their own test based mainly on how much control the business has over the work, and the IRS worker-classification guidance is the place to start when a role sits near the line.
What it should include
A complete agreement names the employer and the worker, the job title, and the start date, and states the compensation in full: the salary or wage, the pay period, any bonus or commission, and benefits.
It fixes the worker's status, whether the role is at-will, fixed-term, or a contractor engagement, and sets out the duties and reporting line.
On top of the basics, it carries the protections a job needs, including a confidentiality clause and assignment of the intellectual property the worker creates. It closes by addressing termination, covering notice, grounds, and any severance, and both parties sign before the start date.
Non-competes and restrictive covenants
Restrictive covenants are the most state-variable part of an employment agreement. A non-compete is void outright in California, Minnesota, North Dakota, and Oklahoma, and elsewhere is enforced only when it is reasonable in duration, geography, and scope.
Regulators have moved to limit them further in recent years, so the safer default is to reach for the narrowest tool that does the job: a confidentiality agreement to protect information and a non-solicitation clause to protect clients and staff, adding a non-compete only where your state clearly enforces one. The directory below shows how each state treats them.
The laws every employer follows
An employment agreement sits inside a body of federal and state law that applies no matter what the contract says. Anti-discrimination law, enforced by the Equal Employment Opportunity Commission, bars decisions based on race, color, religion, sex, national origin, age of forty and over under the ADEA, or disability under the ADA, and it requires reasonable accommodation for a qualified worker who can perform the job's essential functions.
Now, keep in mind, reasonable accommodation is open to interpretation. Is reasonable accommodation changing major parts of a workflow, buying new equipment, or changing the responsibilities of the role? That will be up to you to decide, but the bar should be applied across the board.
Wage-and-hour rules under the federal Fair Labor Standards Act govern minimum wage, overtime, and whether a role is exempt or non-exempt, on top of any higher state minimum. Every new hire must also prove work authorization on Form I-9 after starting. These rules override the contract, so an agreement that ignores them will not hold up.
Common mistakes
Most employment disputes trace back to a few avoidable errors. The costly ones are structural: misclassifying an employee as an independent contractor, or copying a non-compete into a state that bans it.
Others are matters of drafting, such as leaving out at-will language and accidentally implying job security, forgetting to assign the intellectual property an employee creates, or missing the state's final-paycheck deadline when someone leaves.
Each is avoided the same way, by starting from a state-aware agreement and matching every clause to the law that governs it.