Men's Wedding Guest Dress Code, Decoded

Wedding invitations use codes that leave men guessing. Black tie means a tuxedo. Formal or cocktail means a dark suit and tie. Semi-formal allows a suit with more flexibility. Beach or casual still means a suit or a jacket, just lighter. When unsure, dress one notch up.
A wedding invitation often carries a dress code that assumes you know the language. Most men do not, so they guess and hope. Here is what each common code actually means for a male guest, so you turn up dressed exactly right.
Black Tie and Formal
Black tie means a tuxedo, full stop. Formal or black-tie optional means a dark suit in navy or charcoal with a tie is acceptable, though a tuxedo is welcome. These are the most demanding codes, and a well-fitted dark suit is the reliable answer if you do not own a tuxedo. Our post on wedding suit versus tuxedo covers the line between them.

Cocktail and Semi-Formal
Cocktail and semi-formal are the most common wedding codes. Both call for a suit and tie, with a little room to relax the colour and cloth in warmer weather. A navy or grey suit, a crisp shirt, and a tie covers it. This is where most guests land, and where a versatile suit earns its keep.

Beach, Garden, and Casual
Even a casual or beach wedding still means dressing for an occasion. Reach for a lighter suit or a sport coat with trousers rather than jeans, in a breathable cloth and a lighter colour. When a code is unclear, dress one notch up: it is always better to be slightly overdressed at a wedding than under.
FAQ
What does cocktail dress code mean for a man at a wedding?
A suit and tie, with some flexibility in colour and cloth for the weather. A navy or grey suit, a crisp shirt, and a tie is exactly right. Cocktail is the most common wedding code and sits between formal and casual.
What should a man wear to a black-tie wedding?
A tuxedo. Black tie specifically calls for one. If the invitation says black-tie optional, a dark navy or charcoal suit with a tie is acceptable, though a tuxedo is still welcome.
What do you wear to a casual or beach wedding as a male guest?
Still dress for the occasion: a lighter suit or a sport coat with trousers in a breathable cloth and a lighter colour, not jeans. When a dress code is unclear, it is safer to dress one notch up than down.
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