Before your first payroll run, you need a federal EIN, state and, in some cases, local employer tax registrations, and workers' compensation insurance if required in your state. Skipping any of these before the first paycheck goes out creates compliance gaps that are considerably harder to fix retroactively than to set up correctly from the start.
New employees need to complete Form W-4 for federal withholding and any required state equivalent, along with Form I-9 to verify their eligibility to work in the US. These forms determine how much tax gets withheld from each paycheck and need to be kept on file, not just collected and set aside once the hire is made.
A First-Time Employer Who Skipped State Registration
Consider a small business owner hiring their first employee, correctly obtaining a federal EIN and having the new hire complete a W-4 and I-9, but not realizing that a separate state employer registration was also required before the first paycheck could legally be issued. Payroll runs on schedule, the employee is paid, and everything appears to be working fine for the first two months.
In month three, the state's labor department sends a notice: unemployment insurance contributions were never registered or paid for this new employee, and the business now owes back contributions for all three months, plus a penalty for late registration, on top of having to register properly going forward. What would have been a simple online registration completed in under an hour before the first paycheck became a multi-week correction process involving back payments and penalty negotiation, entirely avoidable with a single registration step handled at the very start.
Choosing a pay frequency, weekly, biweekly, semi-monthly, or monthly, is not purely a preference decision, some states impose minimum pay frequency requirements for certain types of employees, and your choice affects how often payroll tax deposits are due.
Payroll tax deposits follow their own schedule, separate from your income tax obligations, either monthly or semi-weekly depending on your total tax liability, and missing a deposit deadline generates penalties regardless of whether your business ultimately owes any additional income tax for the year.
Quarterly Form 941 filings and annual W-2 preparation round out the ongoing compliance calendar. None of this is meant to be a deterrent to hiring, it is simply real infrastructure that needs to be in place before the first payroll run, not built retroactively after a mistake surfaces and back payments start accruing.
The Deposit Schedule Determination Most New Employers Get Wrong
Your payroll tax deposit schedule, monthly or semi-weekly, isn't something you choose freely; it's determined by a lookback period, generally your total tax liability reported during a specific prior 12-month period. Brand-new employers with no lookback history default to a monthly deposit schedule for their first year, regardless of how much payroll they actually run, then transition to whatever schedule their actual liability places them in going forward.
Missing this transition, continuing on a monthly schedule after your liability has grown past the monthly threshold, generates deposit penalties even if the total tax was eventually paid correctly, since the penalty is based on deposit timing, not just the accuracy of the total amount.
It's also worth confirming your state's specific new-hire reporting requirement, since nearly every state requires employers to report new hires to a state directory within a set number of days of the start date, separate from the payroll tax registrations already covered. This requirement exists primarily to support child support enforcement, and missing it can generate its own penalty entirely independent of anything related to payroll tax itself.