15%
OFF
Take 15% Off Your First Knix Order
worked at checkout
Use this discount code to save 15% on your first Knix order.
agents@dealhack$fetch the freshest Knix codes…
Best Knix Promo Codes September 2026
✓agent-verified & updated·
Today's Top Knix Coupons:
15 offers in total15%
OFF
Take 15% Off Storewide at Knix
worked at checkout
Unlock 15% off storewide at Knix with this discount code.
15%
OFF
Get 15% Off Sitewide at Knix
worked at checkout
Enjoy 15% off sitewide at Knix when you use this code.
15%
OFF
15% Off Storewide at Knix
worked at checkout
Unlock 15% off storewide at Knix with this coupon code.
DEAL
Free UltraThin Underwear With Qualifying Bra Purchase
Get a free pair of UltraThin underwear when you purchase any qualifying bra at $58+ or $65+; add both items to your cart and apply the code to receive the free pair (one per person; exclusions apply and cannot be combined with other offers).
15%
OFF
Buy 3+ Underwear, Save 15%, Buy 5+ Underwear, Save 20%
Knix shoppers can mix and match eligible underwear styles to unlock tiered savings. The discount applies at checkout when the cart includes at least three qualifying pairs, with a higher discount when five or more qualifying pairs are purchased.
20%
OFF
20% Off Underwear Kits And Packs
Save 20% on select Knix underwear kits and packs, including curated 2-packs, 3-packs, 5-packs, and special kits that feature built-in bundle pricing versus regular single-item prices.
15%
OFF
Buy 3+ Thigh Savers for 15% Off
Get 15% off when you buy 3 or more qualifying Thigh Saver shorts, with the discount automatically applied at checkout on select full-price styles (excluding Sale and Last Call items).
60%
OFF
Last Call Activewear: Up To 60% Off
Shop select Knix activewear last call styles with discounts up to 60% off, including tanks, leggings, shorts, bras, socks, and accessories with sale prices shown on product listings.
15%
OFF
Founders Pick: 15% Off Select Bra
Save 15% on select Founders Pick bras, with featured styles like the Revolution Adjustable Pullover Bra and similar favorites showing discounted pricing on their product pages.
10%
OFF
Buy 2 Bras, Save 10%
Buy 2 eligible Knix bras and get 10% off your bra purchase at checkout; valid on select full-price best-selling bras and excludes Sale and Last Call items.
20%
OFF
20% Off Underwear Kits & Packs
Get 20% off select underwear kits and multi-packs, including options like The Full Cycle Kit and curated 2- and 3-pack bundles with discounted bundle pricing shown on product pages.
15%
OFF
Buy 3+ Thigh Savers, Save 15%
Save 15% when you buy 3 or more eligible Thigh Saver shorts; discount applies at checkout on select full-price Thigh Saver styles and excludes Sale & Last Call items.
15%
OFF
Founder's Pick: 15% Off Select Styles
Enjoy 15% off Founder's Pick styles, including featured bras like the WingWoman Contour and other highlighted pieces, with promotional pricing displayed directly on qualifying product pages.
60%
OFF
Last Call Clearance: Up to 60% Off Select Styles
Shop select Knix Last Call items at discounts up to 60% off, with markdowns on eligible activewear, bras, underwear, and more shown directly on the sale listings.
Knix Shopping Info
Discounts
✓
Popup/Newsletter
Sign up for emails or texts to get updates, promotions, and special introductory offers.
✓
Loyalty
Knix Rewards
✓
Students
15% off · Student Beans
✓
Birthday
20% off
✓
Refer a Friend
Give $20, Get $20
Shipping & Returns
✓
Free Shipping
Threshold: $100
✓
Intl Shipping
International orders of $150 or more qualify for free shipping.
✓
Free Returns
Window: 30 days · Fee: Free
Final Sale
Warehouse sale items and final call items are final sale and non-returnable.
Payments
Cards
Visa, Mastercard, American Express, Discover
Wallets
Apple Pay, Google Pay, Shop Pay
BNPL
Afterpay
✓
Gift Cards
Knix Code Checks, Day by Day
Every Knix code check from the last 14 days, plotted by the day it ran. Green is how many came back working. Red is how many knix.com would not accept. That is the checkout testing you did not have to sit through yourself.
agents@dealhack: ~/signals --store knix.com --days 14
78
code checks run
56
checks where the code worked
71.8%
success rate
14
different codes tried
14 days · 78 code checks · 56 worked
workedpeak 11
would not applypeak 5
| Day | Codes that worked | Codes that would not apply | Success rate |
|---|---|---|---|
| 1 | 4 | 20% | |
| 0 | 1 | 0% | |
| 0 | 0 | — | |
| 0 | 4 | 0% | |
| 8 | 1 | 89% | |
| 7 | 2 | 78% | |
| 0 | 0 | — | |
| 4 | 3 | 57% | |
| 3 | 1 | 75% | |
| 8 | 5 | 62% | |
| 10 | 0 | 100% | |
| 11 | 0 | 100% | |
| 2 | 0 | 100% | |
| 2 | 1 | 67% |
where this data came from:
54 automated cart runs14 web search results5 shoppers reporting back3 our agents
5 of these results came from shoppers telling us whether a code worked; the rest come from automated checks and the other sources above. Last confirmed working on . Codes that stop clearing get pulled off this page automatically.
What These Numbers Mean
A code check is one result for one code. Most are our agents applying it to a real cart and reading the order total before and after; the rest come from tracked orders and from shoppers reporting back, as broken down above. Worked means the code was accepted and the total went down. Would not apply means knix.com refused it on that cart. That is not the same as the code being fake. The usual reasons are:
- It expired or the store switched it off after it was published.
- It was single-use and had already been redeemed.
- It only covers certain categories, brands or individual products.
- The cart did not reach a minimum spend.
- It is limited to new customers, a first order, or an email sign-up.
- It cannot be combined with an active sale or another code.
- It is tied to a different country, currency or membership.
So a code that failed one check can still work on your cart, and the success rate (checks that worked divided by all checks) is best read as how easily Knix discounts apply in general, not as a verdict on any single code. Hover any bar in the chart to see that day on its own.
When Knix Runs Sales
Recurring events worth timing an order around. Windows shift year to year, so treat them as a shopping calendar rather than a fixed date.
- late NovemberBlack Friday & Cyber Monday
Major sitewide savings events offering deep percentage discounts across wireless bras, leakproof underwear, and activewear selections.
- season changesLast Call Clearance Event
End-of-season markdown events featuring up to 60 percent off select discontinued styles, colors, and limited-edition inventory.
- mid to late yearVIP Days Rewards Event
Exclusive sales for loyalty program members featuring accelerated points multipliers and special redemption discounts.
Locate the Code Box at knix.com
The agents tested the code. Entering it is the one part we leave to you. Here's exactly where the Knix promo code goes at checkout.
Follow the shopper-submitted screenshots below to spot the Knix promo box and apply your code. Miss a step and even a working code does nothing, so the agents mapped every one for you.
How to find
- 1.Click the cart icon to view the shopping bag.
- 2.Click the CHECKOUT NOW button to proceed to the checkout page.
- 3.Locate the Order Summary on the right side of the page.
- 4.Find the text field labeled Discount code or gift card below the item list.
- 5.Enter your code into the field and click Apply.
How to use
Enter your code into the field labeled 'Discount code or gift card' and click the 'Apply' button.
When Do New Knix Deals Drop?
Our agents log every new Knix promo code and deal the day it goes live, and record what the working ones took off a real cart. Here's how many landed each month over the past year, how deep the discounts ran, and when it pays to wait.
New Knix offers per month
busiestavg 4/mo
6
13
3
2
1
3
6
3
1
6
3
What a working code took off the cartmedian per month
$25.87
ran $7.75–$25.87 a carttypical $14.66 (15% off)biggest in June 2026
| Month | New offers | Median off a cart | Share of the cart |
|---|---|---|---|
| 6 | not tracked | not tracked | |
| 13 | $14.66 | 17% | |
| 3 | $10.61 | 10% | |
| 2 | $19.34 | 15% | |
| 1 | $7.75 | 7% | |
| 3 | $7.75 | 12% | |
| 6 | $21.36 | 15% | |
| 3 | $14.40 | 15% | |
| 1 | $25.87 | 15% | |
| 6 | $19.20 | 15% | |
| 3 | not tracked | not tracked |
- Busiest month
- Nov
- 13 offers
- Monthly average
- 4
- new offers
- Quietest month
- Feb
- 1 offers
- Typical discount
- 15% off
- $14.66 a cart
Before You Buy at Knix
What shoppers ask most about Knix.
›Can I combine multiple promo codes or stack discounts on an order?
Only one promotional code or discount coupon can be applied per checkout transaction. Promotional codes do not automatically combine with existing multi-item bundle discounts or loyalty reward redemptions unless explicitly stated in the specific offer terms.
›Are there any brand or collection exclusions where promo codes never apply?
Promotional discount codes never apply to third-party partner items such as NOOD products, gift cards, or items already marked down in the Last Call and final sale clearance categories. These excluded items are exempt from sitewide percentage-off promotions.
›How do I verify my student status to receive the Student Beans discount?
You can unlock your student discount by logging into your Student Beans account during the online checkout verification step. Once your enrollment status is authenticated, a unique single-use code will be issued for your cart.
›Does Knix offer price adjustments if an item goes on sale after purchase?
Price adjustments are honored if an item is marked down within 14 days of your original purchase date. To claim the difference, you must contact customer support with your order number, and the refund will be credited back to your original payment method.
How We Verify Knix Codes
Nothing goes up here on trust. A Knix code is collected, applied to a real knix.com cart, dated the last time it took money off an order, scored on what came back, and pulled once it stops clearing. Promotions have no code to run through a checkout, so those are dated when they go live and dropped when they lapse. Here is how far that has got on this page, and every change the agents logged along the way.
agents@dealhack: ~/verify --store knix.com --loglast change
collect15 Knix offers listed here: 5 codes you paste at checkout, 10 promotions that need none · 3 sent in by shoppers
test5 codes put through a live knix.com cart · last run
confirmall 5 codes took money off an order in the last 7 days · most recently
score4 codes rated on how likely they are to work · last recalculated
measure3 codes with a discount measured on real carts · $2,180 taken off in total
pruneexpired offers and dead codes drop off this page automatically
Recent Knix offer activity
Each entry is a change the agents logged on this page, dated to the day it happened.
5 codes rescored on fresh results
51 signals read · odds of working recalculated
3 codes worked on live knix.com carts
each one took a discount off a real order
2 codes retested at checkout
applied to a live knix.com cart
Code worked on a live knix.com cart
1 signal
Knix listings reviewed
page refreshed, dead codes pulled
New 15% off code added
published by Knix · 80/100 code confidence · 1 of 2 checks worked
4 new codes added
3 sent in by shoppers
The agents keep retesting every Knix code on this page. No one here vouches for a code they did not watch work. If one slips through expired, take the next on the list. We keep backups.
Help Other Knix Shoppers
Not every Knix code reaches us from the store. 3 codes on this page were first submitted by shoppers. They have also sent back 5 checkout results in the last 14 days, telling us which codes worked on a real cart and which came up empty. Wherever a code comes from, it still has to pass the same cart test before it goes up here.
8 hours
since a code sent in by a shopper last took money off a real knix.com cart
6%
of every check on this page came from a shopper, not an agent
Have a code we missed?
Send it over and the agents will run it through a real knix.com cart. If it works, it lands here with the test behind it.
Did a code work for you?
Open any Knix code above and tell us whether it worked. It takes one tap, no sign-up, and a code that keeps failing gets pulled off the page.
Rate a codeKnix Customer Support
Need help with your shopping? Here's what's available for Knix when an order, return, or promo code needs a human.
About Knix
Who you're buying from.
Did You Know
Founding
Knix was established in Toronto, Canada, by entrepreneur Joanna Griffiths to disrupt the traditional intimate apparel market.
Origin Story
The brand originated from a mission to create functional leakproof underwear and seamless period protection products that did not exist previously.
Sustainability
Knix products emphasize reusability and sustainable alternatives to disposable feminine hygiene products and traditional pads.
Stores Like Knix: Today's Best Coupons
These 12 stores sell products similar to Knix. Below you can see the best coupon or deal available at each one today, so you can compare prices before you buy. 10 of them have a promo code you can copy at checkout.
Coalatree60% offBuy 1 Trailhead Pant, Get 60% Off Sage Pair
Apply this Coalatree coupon code to buy one Trailhead Pant and get 60% off one pair of Sage Trailhead Pants. All sales final and no returns.
Get Code
JACHS NYFree Hat on Orders Over $150
Receive a free qualifying hat on orders over $150 before taxes and after discounts, while supplies last.
Get Deal
Madewell30% offMadewell Sale Items: Additional 30% Off
Shop Madewell sale items for Additional 30% Off Sale Items, Up To 50% Off when you order with this code.
- saves ~$34.88
- sitewide
Get Code
WSS25% offGet 25% Off Your WSS Order
Shop at WSS and get 25% off your eligible purchases with this coupon code.
- sitewide
- store issued
Get Code
UGG15% offTake 15% Off All UGG Outlet Items
Shop all UGG Outlet items and save 15% with this coupon code.
- saves ~4%
- community
Get Code
Dr. Comfort10% off10% Off Your Dr. Comfort Purchase
Redeem This Dr. Comfort Promo Code for 10% Off Any Order
- saves ~$14.03
- community
Get Code
SHEFIT20% offTake 20% Off Your Order at Shefit
Use this discount code to get 20% off on eligible Shefit purchases.
- community
Get Code
BSTN15% offExtra 15% Off New Arrivals & Sale Styles
Shop selected new arrivals and sale styles at BSTN and get an extra 15% off with this coupon code.
- sitewide
- store issued
Get Code
La Vie en Rose15% offGet 15% Off Your La Vie En Rose Order
Save 15% on your La Vie En Rose order when you apply this promo code.
- community
Get Code
Scholl Shoes10% offTake 10% Off Your Order at Scholl Shoes
Save 10% on eligible Scholl Shoes purchases when you use this discount code.
- saves ~10%
Get Code
Poppy Barley$200 offMonthly $200 Gift Card Giveaway for SMS Subscribers
US and Canadian SMS subscribers, excluding Quebec, are entered for a monthly chance to win a $200 CAD Poppy Barley gift card. Active SMS subscribers are included in the drawing, with the winner selected on the first business day of each month.
Get Deal
The Oodie15% offSave 15% on Your First App Purchase
Use this promo code to get 15% off your first Oodie app purchase.
- saves ~$17.85
- community
Get Code
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