What to wear during your first week at work
Your first week is mostly about fitting in while people form a first impression. The safest plan is to start one step more formal than you expect, watch what your team actually wears, and adjust by the end of the week. You do not need new clothes for this: a few pieces you already own can cover five days.
The plan for week one
- Day 1: one step more formal than the office norm. It is easier to take off a blazer than to wish you had one.
- Days 2–3: keep the same level and swap a piece or two. Notice what people on your team wear, not the whole building.
- Days 4–5: match your team. If everyone is in knits and chinos, you can be too.
- Meetings with clients or senior leaders override the plan. Dress up for those days.
An example first week
Two fictional weeks for a business casual office. Each outfit gets a little more relaxed as the week goes on.
Day 1: Navy blazer · light shirt · khaki trousers. The blazer adds polish for introductions. Take it off once you see the team is relaxed. 
Days 2–3: Light blue shirt · beige chinos · brown shoes. The same neat level without the jacket. A shirt and chinos fit most business casual offices. 
Days 4–5: Navy knit · khaki chinos · white sneakers. Only once you have seen the team in sneakers. Otherwise, keep the leather shoes.
Day 1: Grey blazer · white top · cream wide-leg trousers. A soft blazer looks prepared without being stiff. The light trousers keep it from feeling like a suit. 
Days 2–3: Light blue shirt · beige trousers. Neat and easy to repeat with different shoes or a cardigan. 
Days 4–5: Cream knit · black midi skirt. Relaxed but put together, a good match once the office feels business casual.
Make a few pieces cover five days
Repeating clothes in your first week is normal, and almost nobody notices. What matters is that the pieces work together. A useful core:
- One layer that adds formality: a blazer, a structured cardigan or an overshirt.
- Two or three tops in plain colours that go with everything.
- Two bottoms: one darker, one lighter.
- One pair of smart shoes, and one comfortable pair that still looks neat.
With those you can make five different combinations, and keep the most formal one for Day 1 or any meeting with leadership.
Check before Monday
- Ask your manager or recruiter what the team usually wears. "What do people on the team usually wear?" is a normal question.
- Check for uniforms, safety rules or lab requirements.
- Try on the Day 1 outfit, shoes included, and think about the commute: walking, stairs, weather.
- Lay out Day 1 and Day 2 the night before.
Plan your outfits from your own clothes
Common questions
Is it OK to wear the same thing twice in my first week?
Yes. Repeat pieces in new combinations. Most people will not notice, and the ones who do will not care.
What if I overdress on day one?
Take off the jacket and adjust the next day. Being a little overdressed in week one is rarely a problem.
What if the office is fully casual?
Wear smart casual on Day 1, such as a clean shirt or knit with chinos, and move to the team’s level from Day 2.