Mainline discount codes for September 2025
Use one of our 6 live Mainline discount codes to save on designer menswear and footwear.

FAQs
Does Mainline offer free delivery?
Yes, when you place an order over £40, you'll automatically qualify for free standard delivery which will arrive within 3 working days. For orders below £35, standard delivery costs £3.95.
Can I get a first order discount at Mainline?
Follow Mainline on Instagram and you can get 10% off your next order. You'll also get 10% off your next order by completing and tracking a 5K run in the Strava app. These discounts are only applicable on full-priced products.
Can I shop the Mainline sale?
Yes! At Mainline, they have a dedicated sale section on their website so you can shop the sale all year round.
What is the returns policy at Mainline?
At Mainline, the brand has a 14-day returns policy in case you're not 100% satisfied with your order. There is a small charge of £3.99 which will be deducted from your refund amount to pay for the cost of making a return.
Hints and Tips
Mainline sale: Shop the dedicated sale section on the Mainline Menswear website to ensure you're making savings all year round. In the past, our money-saving experts have seen savings on brands including BOSS, Under Armour, Ralph Lauren, and more.
Student discount: Students can receive a 10% discount on Mainline Menswear products when they verify their student status using GoCertify or Unidays. Simply log in or sign up for your student account and you will receive a student discount code which you can copy and paste into the discount code box when you go to pay.
Keyworker discount: Mainline Menswear also gives key workers a 10% discount when they verify their employment status, as they think that key workers deserve a little extra thank you. Key workers include NHS employees, emergency service workers, carers and teachers. Student and keyworker discount codes only work on full-priced items, so check this before applying the code to avoid disappointment.
Young Person savings: Mainline Menswear offers a 10% discount for customers aged 15-25. This means that non-students can save some money as well. Just verify your age using your phone number to receive an exclusive youth discount code that you can copy and paste into the discount code box when you go to check out.
How to use your Mainline Menswear discount code
- Browse our website to find the Mainline Menswear voucher code that you would like to use.
- Open up Mainline Menswear on a new tab on your device.
- Have a browse of their website. If anything catches your eye, simply add it to your basket.
- Once you’re happy with the contents of your basket, click ‘Checkout’.
- Next, log into your account or check out as a guest.
- Copy and paste your chosen Mainline Menswear discount code into the promo code box and click ‘Apply’.
- Your discount should be automatically applied to your total.
How do we source promo codes and deals?
We have an experienced team of 5 deal experts based in our offices in Cardiff and London, who are dedicated to finding promo codes, deals and sale highlights for Marie Claire vouchers.
Our London team keep in touch with retailers directly to get a heads up on upcoming discount codes as well as negotiate exclusive promo codes that you won’t find anywhere else. Meanwhile, our Cardiff team partners with affiliate networks and research the web to source the latest discount codes, and put them right here on our dedicated retailer pages. The offers we show you are updated at least twice a week.
To top it off, we have a Bath-based team of editors that have a background in saving money on fashion and beauty products. Using their experience and knowledge of the industry, our editors seek to offer additional ways to save at the retailer outside of using a promo code. Our FAQs and money-saving tips about each retailer are fact-checked and updated every three months.
What if my promo code doesn’t work?
We try hard to avoid listing promo codes that don’t work. To do this we:
- Test the promo codes ourselves to make sure they’re valid.
- We don’t list unique codes that only work once.
- We give as much information as we can to avoid any terms and conditions trickery.
However, sometimes details change or codes expire without us knowing. If you find this to be the case, you can get in touch by emailing vouchers.marieclaire@futurenet.com and letting us know.
How do we make money?
It’s simple, we get a small percentage of the money that you spend with a brand or retailer - a commission. When you use deals and promo codes listed here at Marie Claire vouchers, we get a small share of the retailer's profit as thanks for helping them connect with a new customer. And that’s how we make money while you save money.

Shona Moreland has been an SEO copywriter in Future PLC’s voucher component since early 2022. During this time, she has worked on her money-saving skills and continues to offer some of the best affordability-hacking advice available today. You can now find Shona’s name on Marie Claire, Ideal Home, Who What Wear, Woman & Home, and more, demonstrating an understanding of how to save across the board. Outside of work, Shona hunts for the best deals on fashion, footwear, home decor and appliances without compromising on quality or style. Shona collates the best codes, deals, and savings tips available on the market so you can save more with every shop.
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About Mainline Menswear
Established in 2002, Mainline is a clothing retailer that specialises in high-quality menswear for every occasion. With an impressive collection of iconic clothing brands including Adidas, BOSS, Calvin Klein, Tommy Hilfiger, and more, you'll be able to shop for all of your favourites in one place. With every item of clothing designed with style, comfort, and quality in mind, you'll find something just right for you, whatever your budget. Add a Mainline discount code to your order to save on your next wardrobe addition.
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Shona Moreland has been an SEO copywriter in Future PLC’s voucher component since early 2022. During this time, she has worked on her money-saving skills and continues to offer some of the best affordability-hacking advice available today. You can now find Shona’s name on Marie Claire, Ideal Home, Who What Wear, Woman & Home, and more, demonstrating an understanding of how to save across the board. Outside of work, Shona hunts for the best deals on fashion, footwear, home decor and appliances without compromising on quality or style. Shona collates the best codes, deals, and savings tips available on the market so you can save more with every shop.