The most common dress code is also the hardest to read. Here is how the etiquette books and the style press define it, item by item.
The Cambridge Dictionary defines smart casual as clothing that is “neat and stylish, but not too formal”.[1] Debrett’s calls it “by far the most common of all dress codes”, and also “the hardest dress code to interpret”.[2][3]
The difficulty is that the same two words describe a Friday at the office and a summer lunch in the country. This guide separates them. For every other code, see the dress code chart.
The two levels: “formal” and “informal” smart casual
Debrett’s splits the code in two, and the split explains most of the conflicting advice you will read. At the formal end, a jacket is expected and jeans are not; at the informal end, clean dark jeans are fine.[2]
How to tell which one you are invited to
The invitation: “A printed invitation suggests a smarter event than a text or email.”[2]
The place: town and city events are generally more fashionable and formal than those in the country.[2]
The host: if the host is very traditional or of an older generation, expect the formal end.[2]
The season: Debrett’s calls smart casual usually a summer code; in winter, wear an overcoat rather than an anorak or parka.[2]
Smart casual began as a description of a lounge suit in a less conventional colour and lighter cloth. The phrase is first recorded in an Iowa newspaper in 1924.
Smart casual for men
Formal smart casual
A jacket or blazer; flannels, needlecord trousers or chinos (not jeans); a shirt with a collar, not a T-shirt; smart shoes, “not necessarily lace-ups, but not trainers or sandals.” A sweater if it is cold. A tweed sports jacket with cords or cavalry twill also qualifies.[2]
Informal smart casual
“Smart, clean, dark-coloured jeans”; polo shirts rather than collarless T-shirts; trousers rather than shorts except in high summer or on the beach. Above all, change out of what you were wearing at home: “Just because an event is informal it is not synonymous with making no effort.”[2]
What the style press adds
British GQ defines the smart half as tailoring and leather shoes, and the casual half as clothes designed for sport or leisure, such as jeans, T-shirts and sneakers; smart casual blends the two.[6]
GQ South Africa offers three rules: fit matters more than fabric, muted navy, black and brown look smarter, and allow yourself only one sportswear item per outfit. Esquire UK warns that a shirt, tie, blazer and jeans is one of the biggest pitfalls.
Smart casual for women
Formal smart casual
A smart day dress with a jacket is “a safe choice”. At more casual events, smart trousers or a skirt with a cardigan. Avoid denim unless it is immaculate and balanced with a tailored jacket; avoid high heels and suits, which “look like business clothes”.[2]
Informal smart casual
Dress for the occasion, the time of day and the season. Too much tailoring and heels can look wrong here. Be ready to adjust: swap heels for flats, remove a jacket, take off dressy jewellery.[2] For daytime parties, Debrett’s allows tailored, well-fitted jeans with a tailored jacket, and kitten heels, flats or loafers. For evening parties, dress up: a cocktail-style dress, evening trousers, statement jewellery.[3]
What the style press adds
Vogue suggests starting from work staples (blazers, dress trousers, shirts, skirts) and dressing them down, for example a blazer with jeans. M&S calls it a high-low mix: a pencil skirt or wide-leg trousers with a white T-shirt. Who What Wear’s stylist advises avoiding plunging necklines and very short skirts.
Is it smart casual? Item by item
Where the sources disagree, the verdict says so. Each verdict summarises the sources cited on its card.
Dark jeans
Depends on the level
Fine at informal smart casual, and in a smart-casual office according to Reed, if clean, dark and undistressed. Not at formal smart casual, where Debrett’s specifies chinos, "not jeans".[2][5]
Light-wash or ripped jeans
Ripped: no. Light wash: disputed
Cosmopolitan allows light washes; British GQ and Reed say dark only. Distressed denim is out everywhere.[6]
Shorts
Generally no
"Other than in high summer or on the beach, trousers are better than shorts."[2]
Polo shirt
Yes
Better than a collarless T-shirt. GQ South Africa counts it as your one sporty item in the outfit.[2]
Plain T-shirt
Disputed
Fashion press accepts a white T-shirt under a blazer. Debrett’s formal smart casual asks for a shirt with a collar, "not a t-shirt".[2]
Clean, minimal sneakers
Disputed
British GQ and M&S accept clean, minimal trainers. Debrett’s says "not trainers or sandals", and The Ritz London bars trainers from its restaurants and bars.[2][6]
Tie
Not required
"Ties are not necessary but carrying one is often a good tip, just in case."[2]
Blazer or sports jacket
Yes
The anchor piece of formal smart casual; a tweed sports jacket can take the place of a blazer.[2]
A full business suit
Women: avoid. Men: only dressed down
Debrett’s tells women to avoid suits at smart casual because "they look like business clothes". GQ South Africa: a suit worn with a T-shirt "becomes smart-casual".[2]
Sportswear and gym clothes
No
Debrett’s calls sports clothes and trainers "incorrect" at formal smart casual; The Ritz bars sportswear in all its restaurants and bars.[2][5]
At work vs on an invitation
Most of what you will read about smart casual is written for the office. Careers sites stress that the code has no single meaning: check the written policy, ask a manager, and watch what colleagues wear. Reed’s list for the office is blazers, shirts or blouses, chinos, tailored trousers or dark jeans, and loafers, brogues or ankle boots.
On a social invitation, the context does more work: who is hosting, where, and how the invitation arrived (see the two levels). Debrett’s advice when you cannot tell: ask what others are wearing, or ask the host. “It is always more polite to the host to dress up.”[2]
Smart casual vs business casual
Which is more formal? The sources do not agree. Forbes calls business casual “a bit more formal, conservative, and more restrained”; SEEK says it is “often a step more formal, but neither term has one universal definition”; Who What Wear and Cosmopolitan also place smart casual slightly lower.
Wikipedia notes the two became “virtually undistinguishable” from the 1950s and that any distinction is disputed. Emily Post’s business casual makes the sports coat optional, while Debrett’s formal smart casual expects a jacket.[2][4]
Our reading: in an American office, business casual is usually the slightly dressier of the two. On a British social invitation, smart casual often means a jacket. Read the context, not the label.
Smart casual is also not semi-formal (which asks men for a dark suit and tie) or cocktail (between business casual and black tie).[4] See our guide to cocktail attire for the step up.
Smart casual by occasion
Hotel bar or restaurant
At The Ritz London: smart casual and smart jeans in the bars.
Jacket and tie in the restaurant; no sportswear anywhere.[5]
Wedding that says smart casual
For women, a midi dress with sleek accessories.
When unsure, err formal.
Lunch in the country
For women, jeans or cords with a shirt or jumper rather than high heels and a short skirt.
For men, brown shoes and tweed; trainers generally frowned upon.[2]
Evening party
Women can dress up toward cocktail: a cocktail-style dress, evening trousers, statement jewellery.[3]
Office
Follow the written policy; ask if unclear.
Private clubs use a close cousin of smart casual, usually with stricter rules on collars and denim. See our country club dress code guide.
Common smart casual mistakes
Treating “casual” as permission to make no effort.[2]
Smart casual rewards fit and upkeep more than spending: GQ South Africa’s first rule is that well-cut clothes matter more than the fabric. Our guide to old money style on a budget covers building that wardrobe.
Questions people ask
What is smart casual?
Clothing that is neat and stylish but not too formal: tailored pieces mixed with casual ones. For men, typically a jacket or blazer with chinos and a collared shirt; for women, a day dress with a jacket or smart trousers with a knit.[1][2][6]
What is smart casual for men?
A jacket or blazer, chinos, flannels or cords, a shirt with a collar, and smart shoes such as loafers. A tie is optional, but carrying one is a good idea. At the informal end, clean dark jeans and a polo can pass.[2]
What is smart casual for women?
A smart day dress with a jacket is the safe choice. At more casual events, smart trousers or a skirt with a cardigan. Avoid business suits and high heels, and wear denim only if it is immaculate and balanced with a tailored jacket.[2]
Are jeans smart casual?
Clean, dark, undistressed jeans are acceptable at informal smart casual events and in many workplaces. At the formal end of the code, wear chinos or tailored trousers instead.[2]
Are shorts smart casual?
Generally not. Debrett’s says trousers are better than shorts other than in high summer or on the beach.[2]
Is a polo shirt smart casual?
Yes. Debrett’s prefers a polo shirt to a collarless T-shirt.[2]
Is smart casual the same as business casual?
There is no universal answer. Forbes, SEEK and Who What Wear describe business casual as slightly more formal; Wikipedia notes that the distinction, if any, is disputed. On a British social invitation, smart casual often means a jacket.[2]
Is smart casual the same as semi-formal or cocktail?
No. Semi-formal asks men for a dark suit and tie, and cocktail sits between business casual and black tie. Smart casual is a step below both.[4]
Can you wear sneakers with smart casual?
It is disputed. British GQ and M&S accept clean, minimal trainers; Debrett’s and The Ritz London do not.[2][6]
What does smart casual mean at a restaurant or hotel?
At The Ritz London, for example, smart casual (including smart jeans) is acceptable in the bars and at breakfast, while gentlemen need a jacket and tie for afternoon tea and the restaurant at lunch and dinner. Sportswear is not allowed in any of its restaurants or bars.[5]
