Grow your ecommerce store · Email marketing · 3 min read
Abandoned Cart Emails: Writing Subject Lines and Incentives That Work
Short answer
Good abandoned cart subject lines are short, specific and calm: mention the product or the cart, sound human and avoid fake urgency. Hold incentives back for the second or third email, keep them modest (free shipping or a small discount), use unique single-use codes and test whether the incentive actually lifts profit.
An abandoned cart email has one job: get the shopper back to finish what they started. The subject line decides whether they open it, and the incentive (if any) decides whether you make money doing it.
What makes a good cart subject line
Specific beats clever. "Your cart: Linen Shirt in Sage" tells the reader exactly why this email matters.
Human beats robotic. "Still thinking it over?" sounds like a person. "ACTION REQUIRED: CART EXPIRING" sounds like spam.
Calm beats panic. Fake urgency erodes trust, especially if the cart doesn't actually expire.
Short beats long. On mobile, long subject lines get cut off. Put the hook first.
Subject line ideas by email
Email 1 (about an hour after abandoning)
Purpose: gentle reminder.
- "You left something behind"
- "Still interested in the [product]?"
- "Your cart is saved"
- "Did something go wrong at checkout?"
- "[First name], your [product] is waiting"
Email 2 (about 24 hours)
Purpose: answer objections.
- "Questions about sizing? We can help"
- "Free returns on your [product]"
- "What customers say about the [product]"
- "Here's how shipping works"
Email 3 (48-72 hours, optional incentive)
Purpose: final nudge.
- "Free shipping on your cart, today only"
- "A little something to help you decide"
- "Last reminder about your cart"
Use real deadlines only. If the code expires in 48 hours, say so. If it doesn't, don't pretend.
Preview text matters too
The preview text (the line after the subject in most inboxes) is extra space to persuade. Pair them:
- Subject: "Still thinking about the Harbor Fog candle?"
- Preview: "It ships free over $50, and your cart is saved."
When to use incentives
Discounting the first reminder teaches customers to abandon on purpose and gives margin away to people who would have bought anyway. A better structure:
| Incentive | |
|---|---|
| 1 | None |
| 2 | None; address objections |
| 3 | Optional, modest incentive |
Some brands never discount in cart flows and rely on reassurance instead. Luxury and premium brands often avoid discounts entirely to protect positioning.
Choosing the incentive
- Free shipping: Works when shipping cost is the objection. Feels like help rather than a price cut.
- Small percentage off: Simple but erodes margin on every recovered order.
- Fixed amount off: Clear on higher-priced carts.
- Gift with purchase: Adds value without lowering price.
Use unique, single-use codes so they don't spread on coupon sites. Shopify and email tools like Klaviyo can generate them. See how to use multiple coupon codes in Shopify.
Testing properly
Test one thing at a time: subject line A vs B, or incentive vs no incentive. Judge by revenue per recipient and profit, not opens. A discount that lifts recovered orders slightly but costs more in margin is a loss.
Open rates are unreliable because of privacy features in Apple Mail and others, so focus on clicks and conversions.
The email body still matters
A great subject line gets the open; the email closes the sale. Include the product image, price, a clear button back to checkout, and reassurance about shipping and returns. Keep it short.
Match tone to your brand
A playful candle brand and a premium watch brand shouldn't sound the same. Write subject lines in the voice customers already know from your site.
Examples to avoid
- "URGENT!!! Your cart is about to be deleted" (fake urgency)
- "We miss you" (it's been an hour)
- "Order #12345 incomplete" (looks like a transactional error)
- "Don't miss out on huge savings" (generic, spammy)
For setup steps, see how to send abandoned cart emails in Shopify. For more subject line inspiration, browse outrageous email subject lines.
Frequently asked questions
How long should an abandoned cart subject line be?
Short enough to read fully on a phone, roughly 30-50 characters. Use the preview text to add detail.
Should I use emojis in cart subject lines?
One relevant emoji can help some brands stand out, but it depends on your audience. Test it rather than assuming.
Is free shipping or a percentage discount better?
It depends on your margins and why people abandon. If shipping cost is the main objection, free shipping often works well and protects perceived product value.
Sources and further reading
Platform features, prices and policies change. Check the official help pages linked above before you act on a detail that matters to your store.