Theory Promo Codes
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Active Offers
Up to 50% Off Selected Styles
Save up to 50% on Theory selected styles and refresh your wardrobe with quality pieces.
2 Essential Duos For €420
Get two high quality Theory essentials for only €420 and refresh your wardrobe for less.
Women's Clothing Under €605
Shop Theory women's clothing collection and find quality pieces that won't break the bank under €605.
Women's New Arrivals Under €515
Shop Theory's latest women's collection with stylish pieces all priced under €515 for modern wardrobes.
Women's New Arrivals From €75
Refresh your wardrobe with the latest styles in women's new arrivals, starting at just €75 at Theory.
Free Shipping on All Orders
Enjoy free shipping on all orders from Theory and get your favorite styles delivered right to your door.
Founded in 1997, Theory was established with the goal of making high-quality clothing that is versatile that combines comfort and functionality with a sophisticated design.
Theory creates modern refined clothing that has been designed for everyday life for men and women. Best known for its minimalist aesthetic, premium fabrics, and expertly tailored pieces, Theory creates a wide variety of clothing, including suits, knitwear, dresses, jackets, denim, and accessories.
Theory produces premium clothing that is specifically designed for work, travel, social occasions, and everyday wear that are designed to be worn and valued for years.
A guide on how to use your Theory promo code
Reveal your Theory discount code which you can use on your order after clicking the “Get Code” button at Irish Times Discount Codes.
Browse the clothing and accessories available at Theory. When you have found something that you like, add it to your shopping bag.
When you have finished shopping, head to the checkout page and click on “Apply Promo Code” in the order summary. Paste your Theory promo code in the box and apply it to your order.
Save smart by using these easy tips and tricks
Use the following money-saving tips and tricks to save on your order from Theory:
- Welcome offer – Get 15% off your first order when you subscribe to Theory’s emails.
- Sign up for emails – Subscribe to Theory’s emails to receive updates about new collections, promotions, and special offers.
- Discount codes – Use a Theory discount code on your order to save money.
- Sale – Shop from Theory’s sale section to buy pieces that have already been reduced in price.
- Free shipping – Theory offers free shipping on all standard orders.
Frequently asked questions about Theory
How do I contact Theory?
You can contact Theory’s customer service by emailing customer.care@uk.theory.com.
How much does express shipping cost?
Theory charges €8.95 for express shipping.
What payment methods does Theory accept?
Theory accepts the following forms of payment: Mastercard, Visa, American Express, Paypal, Alipay, and Klarna.
Can I be notified when an out of stock item is available again?
If the item you're looking for is out of stock, Theory will invite you to subscribe to their waiting list which will send you an email once the item is back in stock.
What is Theory’s return policy?
You can return your order to Theory within 14 days of receiving it for a €7.95 return fee.
The Irish Times may earn a commission from some links in this article. Our recommendations are based on independent research and editorial review. Pricing and availability are accurate as of publication date and subject to change.