Reading the small print: minimum spend, exclusions, and gift-card rules

1. Minimum spend, and what counts toward it

"Minimum spend" sounds straightforward — the cart has to be over a certain dollar amount. The wrinkle is which lines on your invoice count toward that total. The most common rule is that the minimum is calculated before tax and before shipping. So if a code says "minimum $50," and your subtotal is $48 with $5 of shipping bringing you to $53, the code may still refuse because the subtotal is under the threshold.

A few other variations worth knowing: some retailers calculate the minimum after other discounts are applied, so a sale-priced cart that crosses the line at full price won't qualify. Subscription items sometimes don't count toward the threshold either, and gift cards almost never count — more on those below.

2. Category exclusions

This is the biggest source of "code is invalid" surprises. The most common exclusion is sale items: a 20%-off code may simply refuse if anything in your cart is already marked down. Other categories that are commonly excluded by default:

• Gift cards (almost universally — they're cash equivalents, so retailers don't discount them).
• Third-party seller listings on a marketplace (the discount only applies to first-party stock).
• Specific brand exclusions — luxury or designer brands often opt out of site-wide promotions.
• New-season releases, sometimes for a defined window after launch.

If your code is rejected, the first thing to check is whether you have anything from these buckets in the cart. Removing it temporarily and re-applying the code is the fastest test.

3. "One use per customer" — but how do they know?

One-use rules are enforced through whatever signal the retailer can grab. Most commonly that's the email address on the account, but it can also be the IP address at checkout, the credit card number, the shipping address, or a combination. That means creating a second account with a fresh email won't always get around it — if you're paying with the same card and shipping to the same address, the code can still refuse on the second order.

Welcome offers in particular are often gated by all of the above. They're meant to acquire genuinely new customers, and retailers have gotten good at spotting recycled identities.

4. Expiry windows that round in awkward ways

"Valid through May 31" sounds clear until you realise it might mean 11:59 pm in the retailer's home time zone, not yours. A code listed as expiring "today" can already be dead by lunchtime in your zone. Use the code earlier rather than later if you're cutting it close.

Two habits that save trouble

Two small habits make most of this go away:

• Before you start filling a cart, scroll to the disclaimer or "terms" link near the offer banner and skim it. Most of the answers are right there.
• If you might come back to the offer later, screenshot the banner and the terms text. The page will change, the URL parameters will drop, and you'll be glad you have a record of what was promised.

Reading the small print isn't glamorous. It does, however, save the awkward moment at checkout when a code you were counting on quietly refuses to apply.

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