Black tieoptional
Black tie optional gives guests a formal evening brief with some flexibility. Men can wear a dinner suit or a dark suit with a tie. Women can choose a gown, a dressy midi or formal evening separates. Keep the shoes and accessories suited to an evening occasion, even when you choose the less formal option.
For her
Wear
- An evening gown or dressy midi
- Formal trousers with an evening top
- Dressy shoes and a compact evening bag
Skip
- A casual sundress or everyday knit set
- Rubber slides and large casual bags
For him
Wear
- A dinner suit with a black bow tie
- Alternatively, a dark matching suit and tie
- A crisp shirt and polished leather shoes
Skip
- An open-neck casual shirt with chinos
- Mixing a dinner jacket with everyday trousers
What optional changes
The alternative is still a formal outfit. Use the invitation’s wording to choose between dinner tailoring and a dark suit. If the host asks for black tie preferred, a dinner suit best matches that request.
A complete outfit
Try on the coat and shoes with the outfit before the event. Formal separates work best when their fabric and finish look deliberate together.
The Khirzad edit
Khirzad is a Foundlab client. Foundlab runs Dress Codes.
Prices and availability checked against Khirzad’s catalogue on 28 October 2026. Check your size and delivery timing at Khirzad.
Evening gowns. Check the host’s guidance on coverage, trains and colours.
Good to know
What to wear to a black tie optional party?
Wear a dinner suit or a dark suit with a tie. For dresses and separates, choose an evening finish: a gown, dressy midi or formal trouser outfit.
What is the dress code for black tie in Australia?
Black tie in Australia still points to a dinner suit and evening gown. The word optional adds a dark-suit alternative; it does not make the party smart casual.
Is it okay to wear a suit to black tie optional?
Yes. A dark matching suit with a dress shirt, tie and polished shoes fits black tie optional. Keep a dinner suit available if the invitation says black tie preferred.
Can a woman wear a black dress to a black tie optional wedding?
A black evening dress can suit the code. Check any cultural or colour requests from the couple, and choose a fabric and cut appropriate for the celebration.
Sources and context
Checked on 26 October 2026. These sources inform the guide. Clothing suggestions also reflect the setting described above; your host’s instructions take priority.
- Debrett’s: Events and dress codes
Traditional evening codes, lounge suits and the distinction between formal and informal smart casual. British etiquette context; Australian venue instructions take priority.
- Calexico: Wedding guest dressing
Australian boutique guidance on semi-formal, beach, cocktail and formal wedding clothing.