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Spend and Save | Spend NT$18,400, Save NT$2,500 and Spend NT$28,500, Save NT$5,300*. SHOP WOMEN SHOP MEN T&C apply

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Men's Bestsellers

Theory is known for our timeless essentials. Discover everything you need to complete your wardrobe, from work to weekend

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Clinton Blazer in Precision Ponte

null ~~Price reduced from to~~ NT$ 17,000

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Sylvain Shirt in Good Cotton

null ~~Price reduced from to~~ NT$ 7,200

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Precise Tee in Cotton Jersey

null ~~Price reduced from to~~ NT$ 3,300

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Zaine Trousers in Precision Ponte

null ~~Price reduced from to~~ NT$ 8,500

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Chambers Blazer in Stretch Wool

null ~~Price reduced from to~~ NT$ 23,300

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Sylvain Shirt in Structure Knit

null ~~Price reduced from to~~ NT$ 7,200

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Precise Tee in Cotton Jersey

null ~~Price reduced from to~~ NT$ 3,300

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Mayer Trousers in Stretch Wool

null ~~Price reduced from to~~ NT$ 9,550

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Clinton Blazer in Precision Ponte

null ~~Price reduced from to~~ NT$ 17,000

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Quick Add

Sylvain Shirt in Good Cotton

null ~~Price reduced from to~~ NT$ 7,200

Purchase 3 Pieces to Unlock Bundle Price

Quick Add

Ryder Tee in Relay Jersey

null ~~Price reduced from to~~ NT$ 5,000

NT$18,400+ Save NT$2,500 | NT$28,500+ Save NT$5,300*

Raffi 5-Pocket Trousers in Neoteric Twill

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Raffi 5-Pocket Trousers in Neoteric Twill

null ~~Price reduced from to~~ NT$ 8,500

Purchase 3 Pieces to Unlock Bundle Price

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WELCOME OFFER
(1) Promotional Period: From April 1, 2024 until further notice. (2) Eligibility: Customers who successfully subscribe to Theory Newsletters during the Promotional Period (“Eligible Customers”). (3) Designated Store in respect of this Promotion: The new Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (4) How to enjoy this Promotion: Eligible Customers can enjoy 15% off on regular-priced products at Theory Online Stores (subject to the Excluded Products as defined below) (the “Discount”) by entering the promotional code at checkout. The promotional code would be sent, via email, to Eligible Customers upon successful newsletter registration. (5) General Terms and Conditions: The Discount only applies to the first order placed by Eligible Customers on Theory Online Stores. The Discount does not apply to the purchase of Theory Project products, Bundles and permanent/core items (the “Excluded Products”). The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. No exchange or return would be provided for products purchased with the Discount under this promotion. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.

BUNDLE PROMOTION
(1) Promotional Period: The Promotional Period is from 1 July, 2025 until further notice. (2) Designated Store in respect of this Promotion: Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (3) How to enjoy this Promotion: During the Promotional Period, all customers can enjoy an additional discount upon purchasing, as the case maybe, 2 or 3 items of the same style (as may be designated by Theory from time to time) in any size or color (collectively the “Designated Items”) in one single transaction at Theory Online Stores (collectively the “Discount”). The Designated items, and the number of Designated Items required to be purchased to unlock the Discount, will be specifically marked on Theory Online Stores. Customers are required to add the Designated Items into bag to unlock the amount of the Discount. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. No exchange or return would be provided for products purchased with the Discount under this promotion. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.

GOLDEN WEEK PROMOTION
(1) Promotional Period: The Promotional Period is from 27 April, 2026 to 5 May, 2026 (both days inclusive). (2) Designated Store in respect of this Promotion: Theory Online Store at hk.theory.com, tw.theory.com, sg.theory.com and au.theory.com (collectively “Theory Online Stores”). (3) How to enjoy this Promotion: During the Promotional Period, all customers can enjoy the following discounts (collectively the “Discount”) upon meeting the following designated spending threshold in one single transaction at Theory Online Stores: (1) NT$2,500 off upon a single net spending of NT$18,400 on any designated full-priced products (collectively the “Designated Products”); and (2) NT$5,300 off upon a single net spending of NT$28,500 on any Designated Product. The Discount will automatically apply at checkout. (4) General Terms and Conditions: The Discount applies to the Designated Products only. The Discount cannot be used in conjunction with any other discounts, promotional offers and coupons (including but not limited to Theory VIP discounts/Theory VIP Birthday discounts, Credit Card Year-Round Discount and Theory CRM Coupons). The Discount cannot be transferred nor exchanged for cash or any other gifts or coupons. No exchange or return would be provided for products purchased with the Discount under this promotion. Theory reserves the right to amend these Terms and conditions without prior notice. Theory reserves the right of final decision in case of any dispute.