The main offer on this page is the 18% off sitewide promo code shown at the top, and it is best for general purchases where no other higher threshold discount applies. Use the 18% off promo when you want a single percent discount that covers the whole cart; the code is valid on website orders and only one discount code may be used per order.
Big carts, $125 or more. If your order totals $125 or more, the 20% off when you spend $125 plus the free after-swim recovery salts usually saves you more than the 18% code. For example, on a $150 order the 20% discount reduces the total by $30 to $120, whereas the 18% promo takes $27 off to $123, so the $125 threshold 20% deal leaves you with the lower total. The 20% offer is applied at checkout when your basket reaches $125.
Mid sized carts, $100 to $124.99. For carts above $100 but below $125, compare the 18% promo with the 5% over $100 plus the free foot scrub. The 5% only applies at $100 or more, so on a $110 order the 18% promo takes $19.80 off (final $90.20) while the 5% takes $5.50 off (final $104.50). In this range the 18% promo is the better single discount, but if the free foot scrub matters to you it arrives automatically on orders over $100.
Small carts, under $70. On orders below $70 the 18% promo code is usually the best choice because other threshold deals do not apply. For a $60 purchase the 18% code saves $10.80, lowering your total to $49.20.
Orders of $70 to $99.99. The free 8 sachet travel kit on orders over $70 is automatic and can be valuable, but it does not change the math of percent discounts. Use the 18% promo for the larger percent saving; you will still receive the free travel kit once your order is over $70.
Skincare and sale items. Skincare products sometimes carry an up to 43% off price already shown on product pages. Those reduced prices are final and need no promo code. For a skincare item originally $80 that is now 43% off, the price shown is $45.60 (you save $34.40), which is a bigger saving on that item than applying the 18% sitewide code to the original price. If you are buying skincare that is on sale, use the sale price on the product page rather than a percent code that cannot be combined.
Specific product or bundle deals. The 15% off skincare code, 12% off eye gel, 10% off selected products, and up to 20% off bundles are all valid only on the items they name. Compare the item level sale or the item specific code price to the cart price after the 18% code to see which leaves the lower total. Note that several codes say discounts cannot be combined, so you may only apply one code per order.
Our records show 48 offers listed for Trihard in the 12 months to October 2026, with seven percentage codes in that time; the biggest code recorded was 20% off and the typical code was 15% off. Our team made 7 checkout tests across 7 offers in the 12 months to October 2026, with screenshots kept as proof.
When deciding, run the math for your cart: apply each applicable percent or the item sale price in turn and take whichever leaves the lower total. Only one promo code can be used per order and many offers explicitly say discounts cannot be combined, so pick the single code or the sale price that gives the best final price.