A one person business decides to hire somebody, an offer is accepted on a Thursday, and the start date is the following Monday. That is a perfectly normal sequence and it is also the point at which a sole trader quietly becomes an employer, which is a different legal category with obligations attached to it. Some of those obligations have deadlines counted in days rather than months, and a few of them cannot be satisfied retroactively at all, which makes the order of operations worth knowing before the offer rather than after it.
Before the Offer: The Registrations That Take Time
Two registrations have to exist before anyone can legally be paid and neither is instant. A federal employer identification number is straightforward and can usually be obtained the same day, but state registrations are slower: an account for income tax withholding and a separate one for unemployment insurance, each with its own application and its own processing time. In some states these take a fortnight, and in most of them the account number is required before a payroll can be filed rather than merely before it is due.
The practical consequence is that the registrations should be started when hiring is decided, not when a candidate accepts. A business that has interviewed, offered, and set a start date before opening a withholding account has committed to a Monday it may not be able to meet. Nothing about this is difficult; it is simply sequential, and the sequence runs in the opposite direction from how hiring feels, since the administrative part is the one with the lead time.
The Documents That Have to Exist on Day One
Three items belong in the file on the first day. Employment eligibility verification has a statutory timetable that begins at hire, and the employee section is completed on the first day of work with the employer section following within three business days, which makes it the one deadline in this list that cannot be quietly caught up on later. A federal withholding certificate is completed by the employee, along with the state equivalent where one exists. And new hire reporting to the state, which most people have never heard of, is generally due within about three weeks.
An offer letter is not legally required in most situations and is worth writing anyway, because it prevents an entire category of later disagreement. Pay rate and whether it is hourly or salaried. Whether the role is classified as exempt from overtime, which is a determination based on duties and salary rather than on preference. Schedule and start date. And a plain statement that employment is at will where that is accurate, phrased without any accidental promise of a fixed term.
Workers Compensation, Which Has the Shortest Fuse
Workers compensation coverage is the item most often missed by first-time employers and the one with the largest consequences, because in the great majority of states it is mandatory from the first employee and the penalties for operating without it are severe. It is bought as a separate policy rather than as part of general liability, and it cannot be obtained retroactively after an injury, which is the point at which its absence is invariably discovered. Rates depend on the class of work, and for trades they are not trivial.
The related question is whether the person is an employee at all, and that determination belongs to the law rather than to the parties. A worker who uses the business’s tools, works the hours the business sets, and takes direction on how the work is done is an employee whatever the paperwork calls them. Getting this wrong is expensive in several directions at once, since a misclassification can produce back taxes, unpaid overtime, and an uninsured injury from the same set of facts.
What Goes on the Wall and in the File
Employers are required to display a set of notices where staff can see them, covering minimum wage, safety, and various state-specific rights, and the poster requirements administered by the Occupational Safety and Health Administration sit alongside the labor ones rather than replacing them. A single business with one employee is still covered by most of this. Free versions of every required notice are available from the agencies themselves, which is worth knowing because a small industry exists to sell laminated versions of documents that cost nothing.
The First Payroll, and What It Proves
Running the first payroll is the moment all of the preceding work either functions or does not. Withholding has to be calculated, deposited on a schedule set by the size of the liability, and reported quarterly, and the deposit timetable is the part that catches people, since it is driven by amounts rather than by convenience. Most one-employee businesses use a payroll service for exactly this reason, at a cost that is modest against the penalties for a missed deposit. Getting through the first cycle cleanly is the real confirmation that Monday was ready, and everything after it is repetition.
