Tantaly's main offer is the Summer Sale delivering 15% off sitewide, making it a strong choice for most shoppers. However, the brand currently has several other deals running, and which one saves you the most depends on what you're buying and how much you're spending.
If you're spending under CA$50: Start by checking whether your items are on sale. If they're marked down, the deal offering up to CA$152 off sale products might work in your favour. If your items aren't discounted, the 10% off everything deal will apply a straightforward discount across your entire basket.
If you're spending between CA$50 and CA$150: The 15% sitewide discount beats the 10% options outright, so that's your baseline. Compare this against the up to CA$152 off sale products deal if any of your items are already reduced—the two discounts don't stack, so you'll want whichever gives the larger saving in your specific basket.
If you're spending over CA$150: The sitewide 15% off should cover most scenarios well. However, if you're buying heavily discounted products, the sale-specific offer might still edge ahead; calculate both to be sure. The 27% off selected products deal is worth checking too, particularly if most of your items are in that promotion category—at higher spends, 27% off will almost certainly beat 15% off.
If you're a first time customer: Signing up to the newsletter could unlock access to special offers beyond what's listed here, making it worth considering as a first step before you shop.
Since only one offer can be applied at checkout, compare the discount amount each one produces in your actual basket before you complete your purchase. Add your items, then check which deal saves you the most money.