Abandoned Cart Email Subject Lines: 30 Examples, With Why
Abandoned cart email subject lines for each email in the flow and for each reason shoppers abandon, with preview text, the reasoning, and what to avoid.
Table of contents
- What makes a good abandoned cart subject line?
- Subject lines by email in the sequence
- Email 1: the reminder (about 1 hour)
- Email 2: the objection-handler (about 24 hours)
- Email 3: the final nudge (about 72 hours)
- Subject lines by the reason shoppers abandon
- Subject lines by category
- Cart vs checkout vs browse abandonment
- What to avoid
- Are abandoned cart emails legal, and are they transactional?
- Test the line, then test the sequence
Abandoned cart emails go to the warmest audience you will ever email: people who chose a product, put it in a cart and got most of the way through checkout. Around seven in ten online carts are abandoned (Baymard Institute documents an average of 70.22% across 50 studies), so the subject line on these emails touches a large share of your near-customers every week.
Most subject line lists treat cart emails as one template with thirty rewordings of “You forgot something”. This guide organises them the way the flow actually works: by which email in the sequence it is, and by why the shopper left. Every line is original, paired with preview text, and followed by the reasoning.
What makes a good abandoned cart subject line?
A good abandoned cart subject line names the product or the cart, makes coming back feel easy, and matches the email’s job in the sequence: a calm reminder first, an answer to the likely objection second, and an incentive (if any) last. It should be short enough to read on a phone and never invent urgency that isn’t real.
Three things set cart subject lines apart from campaign subject lines:
- They’re triggered, so relevance is built in. You don’t need to shout. The shopper knows exactly what you’re talking about.
- Dynamic product names do the heavy lifting. “The Oat linen set is still in your cart” beats any clever generic line. In Klaviyo you can pull the first product name from the Started Checkout event into the subject line. Keep a fallback in case the name is very long or missing.
- The sequence matters more than any single line. Three emails with three different angles recover more than one brilliant line repeated three times.
Subject lines by email in the sequence
The standard structure is three emails, roughly 1 hour, 24 hours and 72 hours after abandonment. We explain why those windows work in abandoned cart email timing and show full email bodies in abandoned cart email examples. Here are subject lines for each.
Email 1: the reminder (about 1 hour)
No discount, no pressure. Many of these shoppers were interrupted: a phone call, a meeting, a slow payment page. Give them a clear way back.
| Subject line | Preview text | Why it works |
|---|---|---|
| Your cart is right where you left it | Pick up in one click. Nothing’s changed. | Reassuring and low-pressure. “One click” makes returning feel effortless. |
| The Harbour parka is saved in your cart | Your size is still in stock. | Dynamic product name makes it instantly recognisable. The preview removes the stock worry. |
| Still deciding on the Oat linen set? | Here’s the fabric guide, and a photo from a real bedroom. | A light question plus useful content, not a sales push. |
| Did checkout give you trouble? | If something broke, reply and we’ll sort it personally. | Works well when your store has had payment errors. Genuinely helpful. |
| Finish your order in under a minute | Your details are saved. Apple Pay and PayPal accepted. | Speaks to effort. Mentioning payment options addresses a common drop-off reason. |
Email 2: the objection-handler (about 24 hours)
Now answer the question that stopped them. Still no discount in most cases. The next section breaks these down by specific objection.
| Subject line | Preview text | Why it works |
|---|---|---|
| What 2,000 reviewers say about the parka | The short version: size up if you layer. | Social proof with a specific, useful takeaway. Use your real review count. |
| Quick answers before you order | Shipping times, returns and sizing, all in one place. | Pre-empts the three most common checkout questions. |
| How the Ridge boot fits (honestly) | Runs half a size small. Here’s our advice. | Candour builds trust and reduces returns. |
| Why people reorder the vanilla protein | It mixes without clumps. And 3 other reasons from customers. | Repeat purchase is strong proof for consumables. |
Email 3: the final nudge (about 72 hours)
If you use an incentive, it goes here, with a real deadline. Use a conditional split so repeat abandoners get a smaller offer or none, which stops the flow from teaching people to abandon for a code.
| Subject line | Preview text | Why it works |
|---|---|---|
| Free shipping on your cart until tomorrow | Applies automatically at checkout. Ends 9pm Thursday. | Shipping cost is the top abandonment reason (see below), and the deadline is genuine. |
| 10% off the things in your cart | Code expires Sunday at midnight. | Clear offer, clear scope, clear end. No drama needed. |
| We’ll hold your items until Friday | After that, your cart clears and stock goes back on sale. | Only use this if it’s true in your store setup. |
| One last note about your cart | No more reminders after this one. Your order’s a click away. | Promising to stop is a relief, and it lifts attention on the final email. |
Subject lines by the reason shoppers abandon
Baymard’s research lists the most common reasons shoppers abandon checkout (excluding people who were just browsing). Match email 2’s subject line to the likely reason in your store and you are answering the real objection instead of repeating a reminder.
| Reason (share of abandoners, per Baymard) | Subject line | Preview text |
|---|---|---|
| Extra costs too high (40%) | Shipping’s on us for your cart | No minimum, until Sunday. The total you see is the total you pay. |
| Extra costs too high | No surprises at checkout | Taxes and delivery shown upfront. Here’s your full total. |
| Delivery too slow (20%) | Order today, it arrives by Friday | Free express delivery on orders placed before 2pm. |
| Didn’t trust the site with card details (19%) | Secure checkout, and 11,000+ happy customers | Shop Pay, PayPal and Apple Pay accepted. |
| Site wanted an account (18%) | No account needed to finish your order | Guest checkout takes about 40 seconds. |
| Checkout too long or complicated (17%) | Two taps and it’s yours | Your cart and details are saved. |
| Returns policy not good enough (13%) | Wear it for 60 days. Return it free. | If it’s not right, the return label’s on us. |
A note on the numbers in these examples: “11,000+ customers” and “60 days” are placeholders. Only put claims in a subject line that are true for your store today, and keep them updated. A subject line that overstates is an accuracy problem under the FTC’s CAN-SPAM guidance and a trust problem with the customer.
Subject lines by category
The objection differs by what you sell. A few category-specific examples:
Supplements and wellness
- “Your Magnesium Glycinate is waiting” / Preview: “Third-party tested. Here’s the certificate.”
- “Not sure which formula? Take the 30-second quiz” / Preview: “We’ll match you to the right one, or tell you to skip it.”
Apparel and footwear
- “Between sizes? Here’s what to pick” / Preview: “Our fit notes, plus free exchanges if we’re wrong.”
- “The Ridge boot in 9.5 is still available” / Preview: “3 pairs left in your size.”
Beauty and skincare
- “Will it suit your skin type?” / Preview: “Who it’s for, who should skip it, and how to patch test.”
- “Your serum, plus a free sample to try first” / Preview: “Add the mini to your cart before you commit to full size.”
High-ticket home and furniture
- “Your sofa, in person” / Preview: “Order free fabric swatches before you decide.”
- “Pay for the Linden sofa over 4 months” / Preview: “Interest-free instalments at checkout.” (Only if you offer it.)
For supplement brands, keep product claims in cart emails within what you can substantiate, because a subject line is still an advertising claim.
Cart vs checkout vs browse abandonment
Klaviyo distinguishes between shoppers who added to cart, those who started checkout, and those who only viewed a product. The subject line should reflect how far they got.
- Started checkout (highest intent): be direct. “Finish your order in under a minute.”
- Added to cart: a little more help. “The Oat linen set is still in your cart.”
- Browse abandonment (viewed only): softer, more discovery-led. “Still thinking about the Harbour parka?” or “More like the one you were looking at.” See our browse abandonment flow guide.
Sending checkout-level urgency to a browser feels intrusive; sending browse-level softness to someone who entered a card number wastes the moment.
What to avoid
- A discount in the first email. It gives away margin on people who would have bought anyway and trains repeat abandoners.
- Fake expiry. “Your cart expires in 1 hour” is a lie in most stores, and subscribers learn it quickly.
- “Re:” or “Fwd:”. Gmail’s sender guidelines tell senders not to use them unless the message really is a reply or forward.
- Guilt. “Did we do something wrong?” works once, reads as passive-aggressive at scale.
- Broken personalisation. “Hey , your cart” happens when there’s no fallback. In Klaviyo, use
{{ first_name|default:'' }}and write the line so it still reads naturally without the name, or preview it in our subject line tester with the “no first name” option. - The same line three times. If email 3’s subject line is email 1’s with “last chance” bolted on, you’ve wasted two sends.
Are abandoned cart emails legal, and are they transactional?
They’re marketing emails, not transactional ones. The FTC’s CAN-SPAM compliance guide defines transactional messages as those that facilitate or confirm “a commercial transaction that the recipient already has agreed to”. An abandoned cart hasn’t been agreed to. The guide also says that if a recipient reasonably interpreting the subject line would conclude the message is a promotion, the primary purpose is commercial. So cart emails need everything a marketing email needs: an unsubscribe link, your physical address, accurate from details and a subject line that “accurately reflect[s] the content”.
Outside the US, consent rules are stricter. In the UK, the ICO’s guidance on electronic mail marketing generally requires consent, with a “soft opt-in” for people who bought, or discussed buying, a similar product from you, were given a clear chance to opt out when their details were collected, and get one in every message. Whether a cart counts depends on how you collected the address. The EU, Australia and Canada have their own rules. In practice, the safest set-up is a flow filter so cart emails only go to profiles who have consented to email marketing.
This is general information, not legal advice. Check your own set-up with a qualified adviser.
Test the line, then test the sequence
A better subject line on email 1 helps; a better sequence helps more. Once the structure is right, A/B test one variable at a time on each email, starting with email 1 because it has the most volume. Our guide to A/B testing email subject lines covers sample sizes and how to call a winner.
For subject lines for every other occasion (sales, launches, restocks, welcome, win-back and newsletters), see our full list of ecommerce email subject lines.
The abandoned cart flow is usually the first flow we rebuild in a new account because the gap between a default template and an engineered sequence is so large. If you want it built properly, with timing, conditional incentives and subject lines tested against your own data, that’s our abandoned cart flow service. Or start with the free Klaviyo audit and we’ll show you what your current flow is leaving behind.
/ Frequently Asked Questions
Q.01 What is a good subject line for an abandoned cart email? +
/ Answer
A good abandoned cart subject line names the product or the cart, makes returning feel effortless, and saves any discount for a later email. "The Harbour parka is saved in your cart" works because it is specific and calm. Pair it with preview text that removes a reason to hesitate, such as stock in their size or free returns.
Q.02 How many emails should be in an abandoned cart flow? +
/ Answer
Most ecommerce brands run three: a reminder around an hour after abandonment, an objection-handling email around 24 hours, and a final email around 72 hours, which is where an incentive goes if you use one. Higher-priced products can justify a fourth. Each email needs its own subject line angle, so subscribers don't see the same reminder three times.
Q.03 Should the first abandoned cart email include a discount? +
/ Answer
Usually not. Many people in the first hour were simply interrupted and will buy at full price with a reminder. Offering a discount immediately gives margin away and teaches repeat shoppers to abandon on purpose. Hold the incentive for the last email, and consider a smaller one for customers who have abandoned before.
Q.04 Are abandoned cart emails transactional or marketing emails? +
/ Answer
Treat them as marketing. Under the FTC's CAN-SPAM guidance, transactional messages facilitate or confirm a transaction the recipient has already agreed to, and an abandoned cart is by definition incomplete. If a reasonable reader would see the subject line as promotional, the message is commercial. Include an unsubscribe link and a physical address. This is general information, not legal advice.
Q.05 Are abandoned cart emails legal? +
/ Answer
Yes, when you have the right basis to email the person. In the US, CAN-SPAM allows commercial email with an opt-out, accurate headers and an honest subject line. In the UK, PECR generally needs consent, with a soft opt-in for existing customers who were offered an opt-out. The EU, Australia and Canada have their own rules. Check with a lawyer; this is not legal advice.
Q.06 What is a normal cart abandonment rate? +
/ Answer
Baymard Institute's documented average across 50 studies is 70.22%, meaning roughly seven in ten online carts are abandoned. Rates vary by device, category and checkout design, so compare against your own trend rather than the average. Baymard's research also shows the top reason (excluding people just browsing) is extra costs such as shipping, tax and fees.
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