First Day at a New Job: How Men Can Prepare
A first day goes better when four things are settled in advance: what to wear, what you will be asked to sign, where you need to be, and what to ask HR. Clothing is the easiest of the four to fix once you know the employer's dress code.
What to wear, based on the dress code
Start with what the employer has told you. Ask your recruiter or manager for the written dress code, and for an office job, look at the company's website and employee photos if the answer is vague. Many men go one notch smarter than the daily norm in an office on day one, as Tapered's guide to interview attire for men suggests, because a jacket can come off and a missing one cannot be added.
Treat these combinations as options within the code you were given. If it says business formal, a navy or charcoal suit with a light shirt and polished lace-ups is one choice. If it says business casual, chinos, a structured-collar shirt and clean leather shoes is another, with a blazer as an extra layer. If the code specifies suits, confirm whether a blazer with separate trousers is acceptable before substituting. In relaxed workplaces, check that jeans are allowed before wearing them. For roles that start with video calls, a solid-color shirt is an option, since small patterns can look busy on camera.
Safety-regulated workplaces need specifics, not a general idea of closed shoes. Ask in writing for the uniform, the exact footwear (type and any required safety rating) and the protective equipment, such as eyewear, gloves, hard hat or high-visibility clothing. Also ask who pays. Under OSHA's PPE standard, employers generally provide required equipment at no cost, with exceptions that include non-specialty safety-toe footwear when you may wear it off the job.
Whatever the code, shoes and grooming get noticed: clean your shoes, trim your beard or nails, and go light on cologne.

The paperwork you may be asked to sign
For the Form I-9, which verifies work eligibility in the US, you complete Section 1 no later than your first day, and your employer reviews your documents within three business days of the hire. You present either one List A document or one List B plus one List C document, so read USCIS's list of acceptable documents beforehand and bring unexpired ones.
The Form W-4 tells your employer how much federal income tax to withhold from your pay. Have your filing details ready, and note that the IRS suggests completing a new one each year and whenever your situation changes.
Before you sign the offer letter or an agreement, compare its terms with what you were told about your title, duties, pay, start date, and notice. If a clause is unclear, such as whether the document is an offer or a contract with terms of its own, plain-English guides of legal documents can help you understand what you are agreeing to before you sign.
Look for confidentiality and non-compete clauses too. The FTC says its nationwide Noncompete Rule is not in effect, so state law matters, and it varies. Most states allow at-will employment, meaning either side can end it at any time for a lawful reason, unless a signed contract says otherwise.
The workplace itself
Confirm the start time, the address and entrance, where to park or which transit line to take, and whom to ask for at reception. If you can, make the commute once at the same hour so day one is not your first look at the route.
Ask what to bring: photo ID, your bank details if payroll uses direct deposit, a lunch, a charged phone. Keep a notebook for names, processes and questions, since you will be given more than you can remember by afternoon; follow your employer's procedure for login details. For remote roles, test your camera, microphone and connection the day before and ask how equipment will be delivered.
Questions to ask HR before day one
These are easier to ask the recruiter or HR contact now than in the middle of onboarding. Ask for the pay schedule and the date of your first paycheck, your exact title and manager, your regular hours and whether breaks are paid. Then ask when you become eligible for benefits and the deadline for enrolling.
Ask HR to confirm the dress code, and any uniform or equipment, in writing. Ask which documents you will sign on day one and whether you can read copies at home first. Ask where the employee handbook is, whether there is a probationary or introductory period, and how to request time off in the first months.
Ask for copies of the documents you sign, which also works when onboarding is electronic, and keep your offer letter. Write down the answers you get, with the date and who gave them, so you have your own record.