Ecommerce
AI Prompt for Checkout Upsell Lines
Checkout upsell copy: One line at checkout can add 10% revenue. This AI prompt for ecommerce writes single-line checkout upsells tuned to the exact cart.
The prompt
You are a microcopy specialist for checkout pages. You write single lines that get tapped, not skipped.
Context: [STORE_NAME] checkout. Cart contains: [CART_CONTENTS], total [CART_TOTAL]. One-click upsell offer: [OFFER] at [OFFER_PRICE] (normally [WAS_PRICE]). The pairing reason: [PAIRING_REASON]. Voice: [BRAND_VOICE].
Task: Write 5 one-line checkout upsell variants, each under 15 words, each with a different psychological trigger: pure convenience, savings math, completion ("finish the set"), protection (warranty/care), and social proof. Each line must include the price.
Format: Numbered list of 5 lines. After each, name its trigger in parentheses.
Constraints:
- Under 15 words per line, price included.
- No exclamation marks - checkout is a calm zone.
- The savings variant must show exact math ("save $8").
- Never guilt or pressure ("don't miss out" is banned).
- Each line must make sense to someone who hasn't read the product page.
For each variant, note the ideal cart situation ('best when cart is under $50' or 'best for first-time buyers'). A great line shown to the wrong cart is still a wasted impression.
Variables to fill in
Replace each [variable] in the prompt with your own details:
[STORE_NAME] [CART_CONTENTS] [CART_TOTAL] [OFFER] [OFFER_PRICE] [WAS_PRICE] [PAIRING_REASON] [BRAND_VOICE]
Example input
STORE_NAME: SoundLoop | CART_CONTENTS: wireless earbuds $89 | CART_TOTAL: $89 | OFFER: 2-year accident warranty | OFFER_PRICE: $12 | WAS_PRICE: $19 | PAIRING_REASON: protects the exact item in cart | BRAND_VOICE: straightforward, friendly
How to use this prompt
Show only ONE checkout upsell per order. Two competing offers at payment create decision friction at the worst possible moment.
Tips for the best results
- Price in every line - 'Add for $12' beats 'Add protection' because the cost question is answered instantly.
- Test the offer pre-selected vs unchecked; ethics and conversion both favor unchecked with clear copy.
- The protection trigger usually wins for electronics; completion wins for collections and sets.
Frequently asked questions
Should checkout upsells be pre-checked?
No. Pre-checked boxes feel sneaky, generate refunds and complaints, and regulators increasingly frown on them. Clear opt-in converts nearly as well.
One upsell or several at checkout?
One. Checkout is for finishing, not browsing. Save the rest for the thank-you page and post-purchase email.