26 Business Casual Outfits for Men: A Whole Workweek Sorted

This is the outfit that works in nearly every business casual office. Navy, light blue, and grey are all calm, professional colours, and they never clash with each other.

The navy blazer does most of the work. It lifts the outfit above everyday casual, but because there’s no tie and the trousers are chinos rather than suit trousers, it doesn’t look stiff.

Keep the shirt collar crisp. A soft, floppy collar under a blazer is the quickest way for this outfit to look tired.

The trouser length matters too. Chinos that pool at the ankle undo the clean line, so aim for little or no break at the shoe.

Fit matters more than the brand, and a tailor can fix most of it. The easy jobs are shortening trousers or chinos, tapering the leg, and adjusting blazer sleeves; taking in a blazer at the waist sits in the middle.

Shoulders are the one thing to get right in the shop. Tailors often call reworking them major surgery, and it’s risky and expensive, so check the shoulder fit before you buy anything else about the blazer.

Take the blazer away from the first outfit, and this is what’s left: a tucked oxford shirt and chinos. It’s the backbone of most business casual wardrobes.

Oxford cloth is slightly thicker and more textured than a dress shirt, so it looks a little more relaxed. That makes it right for business casual, where a shiny, smooth dress shirt can feel too formal.

Where Business Casual Came From

Relaxed office clothing has roots in “Aloha Friday” in 1960s Hawaii, when office workers began wearing aloha shirts at the end of the week. The idea spread through American offices as “casual Friday” in the 1990s, and over time many companies relaxed their dress codes all week.

Even so, an Oxford shirt and chinos remains one of the safest answers to what to wear to a job interview at a relaxed office.

That history is why chinos and oxford shirts became the standard. They were the comfortable middle ground between a suit and weekend clothes.

The mistakes I see most in business casual are small ones. A shirt that hasn’t been pressed, or a vest whose creases show through it. An undershirt peeking above the collar, which a V-neck undershirt solves.

Then there’s what shows when you sit down: socks in a random colour, when they should match your trousers. Add tired, scuffed shoes, or a belt that doesn’t match them, and a good outfit starts to look careless.

A knitted polo is different from a sporty piqué polo. It’s made from a fine knit, often with a softer collar, so it looks smarter and drapes better over the body.

Tuck it in and wear a belt. Untucked, a knit polo starts to look like weekend wear.

A fine crewneck sweater over a collared shirt is one of the easiest ways to look smart in a cold office. The shirt collar adds structure at the neck, and the sweater adds warmth without bulk.

Let the collar sit neatly outside the sweater, and keep the cuffs of the shirt tucked inside the sweater sleeves or showing just slightly.

Many offices allow jeans now, but not every pair works. Dark, clean, straight-leg jeans with a blazer look deliberate rather than casual.

The blazer is what keeps it in business casual. Without it, dark jeans and a tee read as weekend wear.

Check your company’s dress code before you start wearing jeans. Some offices allow them only on Fridays or on days without client meetings.

Pleated trousers have a fold of fabric at the front of the waist, which gives more room at the hip and thigh. They’ve come back into style as a slightly relaxed, more fashion-led choice than slim chinos.

Tucking a fine knit into the higher waist shows off the trousers’ shape. It creates a clean line from the waist down.

Single pleats are the easiest place to start. Double pleats add more volume and suit taller men better.

A quarter-zip over a collared shirt is the relaxed office uniform in many tech and startup workplaces. It’s comfortable, warm, and still looks smarter than a hoodie.

The collared shirt underneath matters. A quarter-zip over a t-shirt can look like gym wear, while a shirt collar keeps it professional.

Zip it partway, so the shirt collar shows. Fully zipped, it hides the collar and loses the smart layer underneath.

A knitted vest over a shirt adds a layer of colour and texture without the warmth of a full sweater. It looks a little preppy and works well in offices that aren’t too heated.

The vest should sit at the waistband or just below it. Too long, and it covers the belt and makes the legs look shorter.

Muted colours like navy, grey, forest green, and camel are the easiest to wear. Bold patterns can look costume-like in a professional setting.

An unstructured blazer has little or no padding in the shoulders and a soft lining, so it moves more like a cardigan. Over a plain t-shirt, it creates a modern, relaxed business casual look.

The t-shirt has to be good quality. A thin, stretched tee makes the outfit look cheap, while a heavyweight cotton tee holds its shape under the blazer.

Spending a little more on a few core basics like this is how you dress business casual on a budget without the outfits looking cheap.

This is not the right outfit for a conservative office or a client meeting. In those settings, swap the tee for a collared shirt.

Sneakers have become common in many business casual offices, but only certain kinds. Minimal leather sneakers in white, black, or tan look clean enough to sit next to chinos and a sweater.

Clean them regularly with a damp cloth. White leather sneakers look scruffy quickly in a professional setting once they start to grey.

The “old money” style favours quality basics in quiet colours, with no logos. Olive green is a good entry point, because it pairs well with cream, navy, and brown.

This look depends on fabric and fit more than anything else. A well-fitted merino sweater and good trousers look expensive even without brand names.

Keep accessories simple: a leather-strap watch and a brown belt are enough. Adding more takes away from the understated feel.

All black looks sleek and modern, and it’s easy to put together. It suits creative fields like design, media, and tech especially well.

Mixing textures stops it from looking flat. A matte merino knit with smooth trousers and polished leather shoes keeps each piece distinct.

Make sure the blacks match closely. A faded black sweater next to new black trousers looks like an accident.

Combining black and grey softens all black and adds some depth. It’s a calm, modern palette that works in almost any office.

Varying the shades is what makes it work. Light grey trousers with a darker top, or the reverse, keeps the outfit from blurring into one colour.

Black shoes are the safest choice here. Brown can work, but it shifts the outfit toward a warmer, less sleek look.

Browns, tans, creams, and rust tones feel warm and approachable. A brown blazer or corduroy jacket gives a business casual outfit a relaxed, autumn feel.

Layering different shades of brown adds depth. A tan shirt, a darker brown blazer, and cream trousers look richer than one flat brown head to toe.

A tonal outfit uses different shades of one colour. Blue works especially well, because navy, mid-blue, and light blue all feel professional.

Keep at least two clear steps of contrast between the shades. If they’re too close, the pieces look like they almost match but don’t.

Red can feel too bold for the office, but burgundy is a deeper, quieter shade. One burgundy piece, like a sweater or tie, adds colour while staying professional.

Burgundy pairs especially well with grey. The cool grey makes the warm red tone stand out without looking flashy.

Linen and linen-blend shirts are cooler than cotton because the fabric is loose and breathable. Paired with lightweight cotton trousers, they make a comfortable summer business casual outfit.

Lighter colours like white, beige, light blue, and sage reflect heat better than dark colours. They also look fresher on hot days.

Loafers without visible socks keep the summer feel. Use no-show socks so your feet stay comfortable.

Some workplaces in warm, coastal areas, and some summer events, allow a more relaxed version of business casual. Tailored shorts and a crisp short-sleeve shirt can still look professional.

The shorts need to be tailored, not cargo or athletic. A clean hem just above the knee and a neat crease keep them looking smart.

Tuck the shirt in and wear a belt. Untucked, the outfit quickly reads as holiday wear.

An overshirt sits between a shirt and a jacket. Worn open over a collared shirt, it adds warmth and texture, and it can come off once the office warms up.

Pick an overshirt that’s slightly larger than your regular shirt size, so it sits comfortably over the layer underneath without pulling.

This outfit suits relaxed and mid-level offices. For a conservative office, a blazer is still the safer outer layer.

A thin merino rollneck under a wool overcoat looks sharp and keeps you warm. Paired with wool trousers, it’s a winter outfit that works for meetings and commutes alike.

Layering it well keeps you comfortable both outside and in a heated office:

Merino handles changing temperatures well, so you won’t overheat once you’re at your desk. A cotton rollneck tends to feel stuffy indoors.

A trench coat was designed for rain and fits naturally over business casual. It covers a blazer completely, so your outfit underneath stays dry.

Darker trousers hide splashes better than light ones. Navy, charcoal, and dark grey are the practical choices for wet weather.

Business travel needs clothes that look smart but survive hours of sitting. Stretch chinos and a knit blazer move with you and come out of a suitcase with fewer wrinkles.

A merino t-shirt or polo under the blazer stays fresher than cotton over a long day, since merino handles sweat and odour well.

When a company describes its dress code as business casual, the safest interview outfit is the smartest version of it. A navy blazer, white shirt, and grey trousers look polished without being as formal as a suit.

Different industries read business casual differently, so it helps to match the setting.

When in doubt, dress one step smarter than the people who already work there. It shows you took the interview seriously.

Evening work events usually call for a darker version of business casual. Swapping your daytime colours for charcoal, black, or deep navy makes the outfit look more suited to the evening.

Keep a dark blazer and a pair of leather shoes at the office if you often have evening events. You can switch your outfit in a few minutes without going home.

For men over 40 and 50, business casual looks best when it leans toward quality and fit rather than trends. Good fabrics like wool, flannel, and merino do more than any fashionable cut.

A knit tie is a relaxed option if you want a little more polish without wearing a formal silk tie. It suits business casual better than a shiny tie.

The right fit matters more than anything for bigger men. Clothes that are too tight pull at buttons, while clothes that are too baggy add bulk.

Darker colours and vertical lines, like a single-breasted blazer with one or two buttons, create a long, clean line. A straight-leg trouser balances a broader upper body better than a skinny fit.

Stretch fabrics help too. Trousers and shirts with a small amount of stretch stay comfortable through a full workday without looking loose.