Smart Casual with a Suit — How to Style a Relaxed Look

Last updated: September 8, 2026

A suit doesn't just have to be for the office or special occasions. Styled correctly, it can easily be worn casually — without a tie, without stiffness, but still with the elegance that characterizes a well-thought-out look.

Here's your guide to styling your suit smart casual: how to break up the suit, which materials lower the formality, and which mistakes to avoid along the way.

What is smart casual with a suit?

Smart casual is about maintaining the sophisticated look of a suit without signaling office wear or a formal occasion. In practice, this means breaking some of the rigid rules — the tie comes off, the jacket and trousers don't have to match, and the materials can be more relaxed — while the silhouette and fit still keep the look sharp.

It's a style that works for everything from after-work drinks to dinner or a more informal business setting where a full suit would feel too stiff.

How to separate your suit — jacket and trousers worn separately

The simplest way to smart casual is to break the suit into two independent parts. Wear the jacket as a blazer over jeans or chinos, or combine the suit trousers with a knitted cardigan or a textured shirt.

If you choose to separate the suit, the rule is to maintain a clear contrast between the jacket and trousers — either in color or fabric. If the jacket and trousers are too close in shade without being a definite suit, it can easily look like a suit where you've just forgotten the right pair of trousers at home.

Good combinations to start with

• Navy blazer with light chinos or dark, undestroyed jeans
• Grey wool trousers with a textured jacket in an earth tone
• The same suit, but without a tie and with the top button open

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Shirt and knitwear: how to lower the level of formality

The shirt is where you can most quickly adjust the level of formality. A solid-colored shirt in a softer cotton or Oxford weave immediately looks more relaxed than a classic poplin shirt, even in white or light blue.

A turtleneck sweater or a thin merino knit under the jacket is another safe choice — it gives a calm, modern look and completely eliminates the need for a tie. If you're unsure which colors go together, you can draw on the principles from our complete color guide for suits — the same contrast rules apply, even if the tie has been replaced with knitwear.

"I can only give my warmest recommendations to Suits Copenhagen. From start to finish, the experience has been professional, personal, and of the absolute highest standard." — C.A.

Shoes and accessories that elevate the casual look

Shoes often determine whether a smart casual look succeeds or fails. A loafer or a Chelsea boot in matte leather or suede is a safe bet — they are relaxed enough to match broken suits, but still too well-formed to appear sloppy.

Accessories that support the look

• A simple, minimalist watch instead of a large formal one
• A discreet pocket square in wool or cotton instead of silk
• A belt that matches the shoes' leather — it's still a detail that gets noticed

This relaxed approach to styling is in line with the general movement in men's fashion right now — read more about it in our suit trends for 2026, where broken suits and a more relaxed silhouette play a larger role than before.

Why Custom Made makes smart casual easier

When a suit is tailor-made, it's much easier to break it up and style it casually, because each part — jacket and trousers — already fits perfectly individually and doesn't depend on being worn together to look right.

At SUITS COPENHAGEN, we work with Italian fabrics that work equally well formally and casually, and with our 3D design visualization via Tailoor, you can see how the jacket and trousers look separately, even before production begins. If you need both — the formal and the casual — it might be worth looking at how a suit functions in a more formal context in our guide to business style.

Common mistakes to avoid

The most common mistake is to break up the suit but keep the suit shoes — a shiny Oxford shoe looks out of place with jeans or chinos, no matter how good the rest of the look is.

Another mistake is choosing a jacket and trousers in shades that are too close to each other. This doesn't read as a deliberate choice, but as a suit that has been accidentally separated. Always ensure a clear contrast if you break up the suit.

Frequently asked questions about smart casual with suits

Zakaria

Founder of SUITS COPENHAGEN with 15+ years of experience helping men style their suits for everything from the office to more relaxed occasions.

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