What to Wear to an Internship

Getting the dress code wrong in your first week of an internship is a minor thing that can feel enormous in the moment. Showing up in a suit to a creative agency where everyone is in trainers, or arriving in jeans to a client-facing finance role where the team is in formal business wear, creates an immediate gap between you and the environment that takes time to close. The good news is that with a small amount of research before day one, this is almost entirely avoidable.

Research Before You Arrive

The best time to figure out the dress code is before your first day, not on the morning of it. Start with the company's own website and social media. LinkedIn and Instagram in particular often show candid photos of team events, office days, and company announcements, and the clothing people are wearing in those images is far more informative than any dress code policy stated in an employee handbook.

If the company's digital presence gives you nothing useful, look at the industry. Law firms, accountancy practices, banking, and most corporate finance environments typically maintain formal or smart-formal standards. Tech companies, creative agencies, media, and start-ups tend toward smart casual or casual. Retail and hospitality often have their own uniform, which removes the question entirely.

If you still cannot work it out, it is entirely reasonable to email whoever is organising your start date and ask directly. Frame it practically: "I want to make sure I dress appropriately, is there a dress code I should be aware of?" Nobody will think less of you for asking. They will probably appreciate that you are being thoughtful about it.

Understanding the Office Cultures

Most workplaces fall into one of three broad categories, and recognising which one you are entering makes dressing for it much simpler.

Formal and Business Formal

These environments, primarily finance, law, consulting, and certain public sector roles, expect professional dress as a standard. For men, this typically means suits, pressed shirts, and leather shoes. For women, it means tailored trousers or skirts, blazers, or professional dresses. The expectation is that clothing does not call attention to itself. Quality and fit matter more than labels.

If you do not own a suit and cannot afford one before you start, a well-fitted pair of dark trousers and a plain blazer with a pressed shirt will carry you through most formal environments until you can invest properly.

Smart Casual

Smart casual is the most common dress code in professional environments and also the most confusing, because it covers a wide range. In practice, it usually means: no jeans (or dark jeans only), no trainers, no t-shirts. Chinos, smart trousers, blouses, knitwear, and clean leather or suede shoes are all appropriate. The standard is that you look put-together without looking formal.

When in doubt within a smart casual environment, err slightly more formal rather than more casual. It is much easier to relax your look once you understand the culture than to recover from coming in too casual on day one.

Startup and Creative Casual

Genuinely casual offices, where jeans, clean trainers, and even t-shirts are common, do exist. But even in these environments, there is usually a floor below which people do not go. Clothes that are visibly worn, dirty, or inappropriate for a professional setting stand out negatively even in casual offices. "Casual" in a work context means relaxed, not unconsidered.

What to Avoid

Regardless of dress code, there are things worth avoiding in the first month of an internship. Very strong fragrances in shared office spaces are more disruptive than most people realise. Clothing with visible logos or slogans can read as juvenile in environments where it is unexpected. Anything that would attract comment, very short hemlines, very loud prints, very casual footwear, is worth setting aside until you understand the culture well enough to know whether it fits.

This is not about suppressing your personality. It is about the timing. Your first month is a period of observation and integration. Once you have established yourself and understand the environment, you have much more latitude. Many interns who have settled into a role dress considerably more individually by month two or three, and it reads differently once people know who you are.

Also worth avoiding: spending money you do not have on a new wardrobe before you start. Most workplaces do not expect interns to arrive with an extensive professional wardrobe. A few versatile, well-maintained pieces will serve you far better than a rushed shopping trip full of things that do not quite fit or that you would not have chosen with more time.

If You Get It Wrong

If you misjudge the dress code on day one, and some people do, the best response is low-key course correction, not anxiety. Adjust what you wear from day two onward. If you arrived overdressed, simplify. If you arrived underdressed, add a layer of formality. Do not mention it repeatedly or apologise for it. Nobody is paying as much attention to your clothing as you are.

If someone does comment, a friendly colleague who notices you seem overdressed and wants to reassure you, take it gracefully. "Good to know, I wasn't sure what the expectation was" is all you need to say. It shows self-awareness without making the moment bigger than it needs to be.

Getting the dress code slightly wrong is recoverable within a day. What matters more than the clothes is how you carry yourself in them, whether you seem comfortable, confident, and present. Those things come across regardless of the exact outfit, and they are what people will actually remember about your first week.