Card payments (including Klarna) carry a 3% processing fee on your order total after any coupon is applied. It shows as its own line in the order summary, so you can see your full total before you pay.
Here’s why it exists: card processing in the research space costs us about 18% of every card order. The 3% fee only offsets a small part of that cost, and we absorb the rest.
If you’d rather skip the fee, Zelle and Same-Day Bank Payment (ACH) have no processing fee and save you 5% instead. Optional Loti Labs Shipping Protection and any paid shipping upgrade are also listed as separate lines.
If your total doesn’t look right, email [email protected] with your order number.