Ecommerce Email Subject Lines: 65 Examples by Occasion
Sale, promotional, launch, restock, welcome, cart, win-back and newsletter email subject lines for ecommerce brands, each with preview text and the reasoning.
Table of contents
- What makes a good ecommerce email subject line?
- Sale email subject lines
- Sitewide and category sales
- Flash sales
- Last chance and extensions
- VIP and early access
- Promotional email subject lines (without a discount)
- Product launch email subject lines
- Back-in-stock and restock subject lines
- Welcome email subject lines
- Abandoned cart subject lines
- Post-purchase and replenishment subject lines
- Win-back subject lines
- Newsletter subject lines
- How to write your own ecommerce subject lines
- Test, don’t guess
A subject line has one job: get the right people to open an email that is worth opening. Most “best subject lines” lists ignore the second half of that sentence. They collect clever lines from every industry, strip out the context, and leave you to guess which ones would work for a store selling protein powder or linen sheets.
This list is built for ecommerce. Every line below is original, organised by the occasion it is written for (sale, launch, restock, welcome, cart, win-back, newsletter and more), paired with preview text, and followed by the reason it works. Borrow the structure, not the words. Your products, your customers and your voice should fill the brackets.
What makes a good ecommerce email subject line?
A good ecommerce subject line tells the subscriber, within the first 30 to 40 characters, what is inside and why it matters to them now: the offer, the product, or the useful thing they will learn. It is specific, honest about what the email contains, and written as a pair with the preview text, which carries the second detail.
Four rules sit under every line in this guide:
- Front-load the point. Phones cut subject lines off early. If the offer lives in the last ten characters, most of your list never sees it. Paste any line into our free subject line tester to see roughly where iPhone Mail and the Gmail app truncate it.
- Specific beats clever. “30% off the linen range” gives a reason to open. “You won’t believe this” asks the reader to do the work.
- Write subject and preview text together. The subject earns attention; the preview gives the reason. If the preview text is blank, most inboxes show whatever text comes first in the email, usually “View in browser”.
- Keep it true. The FTC’s CAN-SPAM compliance guide is blunt: “The subject line must accurately reflect the content of the message.” Fake deadlines and fake order updates also train subscribers to ignore you, which is worse for revenue than any regulator.
Sale email subject lines
Sale emails are where most brands default to “BIG SALE!!!” and wonder why the click rate is flat. The pattern that works is offer + scope + reason to act. Here are lines for each stage of a sale, with the preview text written to finish the job.
Sitewide and category sales
| Subject line | Preview text | Why it works |
|---|---|---|
| 25% off every serum until Sunday | Including the vitamin C one that sold out in March. | Offer, scope and deadline in 32 characters. The preview adds social proof without shouting. |
| The linen sale starts now | Sheets, duvet covers and pillowcases, all 20% off. | Names the category first so linen buyers self-select. Preview supplies the number. |
| 30% off. Yes, the bestsellers too. | Nothing held back this time. Ends Monday 11:59pm. | Pre-empts the objection every sale shopper has: “the good stuff is excluded”. |
| Everything under $40, this weekend only | Stocking fillers, travel sizes and the minis. | A price ceiling is often more concrete than a percentage for low-AOV stores. |
| Our first sale this year | 20% off sitewide, until Thursday. | Scarcity that is actually true. Only use it if you really run sales rarely. |
| Up to 50% off last season’s colours | Final sizes only, so the good ones go first. | ”Up to” is honest when discounts vary, and the preview explains why to hurry. |
Flash sales
| Subject line | Preview text | Why it works |
|---|---|---|
| 6 hours, 30% off, no code needed | It’s already applied at checkout. Ends 9pm ET. | Three facts, zero adjectives. Removing the code removes a step. |
| Flash sale: the travel mugs | 24 hours only. 35% off every colour. | Tight scope makes a flash sale feel deliberate, not desperate. |
| Until midnight: free express shipping | On every order, no minimum. | Shipping offers protect margin and are easy to understand at a glance. |
Last chance and extensions
| Subject line | Preview text | Why it works |
|---|---|---|
| Ends tonight: 25% off serums | After midnight it’s back to full price. | The deadline goes first because it’s the news. Plain, factual, believable. |
| 3 hours left on the linen sale | Your size in the Oat set is still in stock. | Adding a stock detail (via dynamic content) makes the reminder personal. |
| We’re extending the sale 24 hours | A few of you asked. Same 20% off, until Tuesday. | Honest extensions work when they’re rare and explained. Don’t do it every sale. |
| The sale is over (almost) | Final call on 30% off. Checkout closes at 11:59pm. | Pattern interrupt that still states the facts in the preview. |
VIP and early access
| Subject line | Preview text | Why it works |
|---|---|---|
| You’re in before everyone else | Early access to 25% off opens now, 24 hours ahead. | Rewards engagement. Send only to buyers or engaged subscribers so it’s true. |
| Early access for our repeat customers | Your code works from today. Everyone else waits until Friday. | Names why they qualify, which makes the privilege feel real. |
| [First name], the sale opens for you first | Shop 24 hours early. Full sizes, full range. | Personalisation earns its place here: it’s genuinely addressed to them. |
For the thinking behind the timing of each send in a sale week, see our BFCM email marketing strategy. Black Friday and holiday lines have their own list: Black Friday email subject lines.
Promotional email subject lines (without a discount)
Not every promotion needs a percentage. Discount fatigue is real, and these offers often protect margin better.
| Subject line | Preview text | Why it works |
|---|---|---|
| Free gift over $75 this week | A full-size lip balm, while the batch lasts. | A specific gift beats a vague “free gift”. Name it. |
| Bundle and save on the morning stack | Greens, collagen and a shaker for $20 less than buying separately. | Tells the customer exactly what they get and how much they save. |
| Double points on everything until Friday | Your balance is waiting. Points never expire. | Loyalty promos reward existing customers without training them on discounts. |
| Free shipping, no minimum, 48 hours | Order one thing. We’ll still send it free. | Removes the most common checkout objection, stated plainly. |
| Buy the set, get the travel pouch | Our most-asked-for extra, on us with any gift set. | Leads with the customer benefit, not the brand. |
| 2 for $50 on every candle | Mix scents. Ends Sunday. | Multi-buy pricing in one line, with the flexibility they’ll ask about in the preview. |
Product launch email subject lines
Launch emails compete with curiosity rather than price. The best ones name the product and the problem it solves, or give a genuine reason to be first.
| Subject line | Preview text | Why it works |
|---|---|---|
| New: the magnesium you take at night | Glycinate, no chalky aftertaste. Out today. | ”New:” plus a plain description. Subscribers know instantly if it’s for them. |
| It took us 14 months to make this | Meet the trail runner we rebuilt from the sole up. | A specific number makes the effort story credible. |
| The colour you kept asking for | Sage is here, in every size. | Callback to customer requests builds goodwill and curiosity together. |
| Launching Thursday: a sunscreen that doesn’t pill | Subscribers get it Wednesday. Set a reminder. | A pre-launch line that promises early access and a clear benefit. |
| Our founder’s favourite thing we’ve ever made | The new cold brew concentrate, and why it matters to her. | Personal endorsement from inside the brand, not an influencer. |
| Now in 60 capsules | Same formula, twice the supply, better price per day. | Pack-size launches are often the most commercially useful. Say what changed. |
Back-in-stock and restock subject lines
Restock emails are some of the highest-intent sends a store makes, especially when they go to people who asked to be notified. Clarity wins. Build them as flows; our guide to price drop and back-in-stock flows in Klaviyo covers the setup.
| Subject line | Preview text | Why it works |
|---|---|---|
| It’s back: the Oat linen set | You asked us to tell you. Sizes S to XL in stock now. | Names the exact product. The preview confirms their size is available. |
| Your size is back in stock | The Ridge boot in 9.5. Last time it sold out in 4 days. | Specific to the subscriber’s request. History gives a real reason to move. |
| Restocked, but not for long | 400 units of the vanilla protein. We’ll send no second reminder. | A true quantity is more persuasive than “limited stock”. |
| The waitlist is open for the next batch | Join now and you’ll get first pick in November. | Converts a sell-out into a list-building moment. |
| Good news on the matcha | The ceremonial grade is back, and so is the price you paid last time. | Friendly and specific. Useful for returning buyers. |
Price drop variant: “The jacket you looked at is now $40 less” / Preview: “Price drop on the Harbour parka, in your size.” Direct, personal, and it only works because it’s true for the recipient.
Welcome email subject lines
The welcome email usually has the highest open rate a subscriber will ever give you, so the subject line’s job is less about getting the open and more about setting the tone for everything after. Deliver what the popup promised, first. The full sequence is in our welcome series framework.
| Subject line | Preview text | Why it works |
|---|---|---|
| Here’s your 15% off, as promised | Code inside. Works on everything, including new arrivals. | Delivers the incentive immediately. “As promised” signals reliability. |
| Welcome. Your code is WELCOME15 | Valid for 7 days on your first order. | Putting the code in the subject means they can use it without opening. That’s generous, and it builds trust. |
| You’re in. Here’s what happens next | Your discount, then 3 short emails on how to choose the right formula. | Sets expectations, which reduces unsubscribes later in the series. |
| Start here: our 3 bestsellers | And the one question to ask before you pick. | Useful for subscribers who signed up without an incentive. |
| Why we started making protein bars | (And why ours have 6 ingredients.) Plus your 10% code. | Brand story email with the incentive attached, so it earns the open. |
Abandoned cart subject lines
Cart emails go to people who were about to buy, so the subject line should make returning feel effortless, not desperate. Lead with the product, not a discount. We cover this flow in depth in abandoned cart email subject lines, but here are a few by stage:
- Email 1 (reminder): “The Harbour parka is saved in your cart” / Preview: “Your size is still in stock. Pick up where you left off.”
- Email 2 (objection): “Questions about sizing? We’ve got you” / Preview: “Free exchanges, and a fit guide from 2,000+ reviews.”
- Email 3 (incentive, if you use one): “Free shipping on your cart until tomorrow” / Preview: “We’ll hold your items until 9pm Thursday.”
For the email bodies and the sequence logic, see our abandoned cart email examples.
Post-purchase and replenishment subject lines
These rarely appear in subject line lists, which is odd, because for consumables they drive a large share of repeat revenue. For supplements, coffee, skincare and pet food, a well-timed refill reminder is the most useful email you send.
| Subject line | Preview text | Why it works |
|---|---|---|
| Your order is confirmed. Here’s how to take it. | Morning or night, with food or without: a 60-second guide. | Answers the first question a new customer has, which cuts support tickets and early churn. |
| Day 10 check-in: how’s the sleep? | Most people notice changes in week 2 to 3. Here’s what to expect. | Sets honest expectations, which reduces “it didn’t work” refunds. Keep any claims within what you can substantiate. |
| You’re about 5 days from running out | Reorder now and it arrives before your last scoop. | Timed to their order date. It’s a service, not a sales pitch. |
| Subscribe and never run out again | Save 15% and skip or pause any time. | Converts one-off buyers to subscription with the two reassurances they need. |
| What did you think of the linen set? | 30 seconds, 5 stars or 1. We read every review. | A review request that feels human and takes little effort. |
Win-back subject lines
Win-back emails go to customers who have gone quiet. Guilt-trips (“We miss you!”) are overused. Give them something new, useful or genuinely better instead. The flow structure is in our win-back flow guide.
| Subject line | Preview text | Why it works |
|---|---|---|
| A lot has changed since your last order | New flavours, a bigger tub and free shipping over $50. | Gives lapsed customers news, not nostalgia. |
| Your favourite has a new version | The Classic tee now comes in heavyweight cotton. | Anchors on what they bought, which makes it relevant. |
| We fixed the thing you told us about | Our lids don’t leak anymore. Genuinely. | Works when you have real product improvements to report. |
| A thank-you for coming back: 20% off | For customers we haven’t seen in a while. Until Sunday. | Clear incentive, clear reason, clear deadline. |
| Should we stop emailing you? | One click keeps you on the list. Otherwise, no hard feelings. | The sunset email. Honest, and it protects deliverability by cleaning the list. |
Newsletter subject lines
Newsletters and content emails don’t have an offer to lead with, which is exactly why “Our September newsletter” fails. Sell the single best thing inside.
| Subject line | Preview text | Why it works |
|---|---|---|
| The 4-minute cold brew method we swear by | Plus: why your beans taste flat after a week. | A specific, useful promise. The preview hints at a second story. |
| 3 things we got wrong about retinol | And the routine our formulator actually uses. | Admitting a mistake is a pattern interrupt, and it builds credibility. |
| What 1,200 customers told us this year | The survey results, including the brutal ones. | Transparency plus a concrete number. Use your real figure. |
| How to layer for a 5°C morning run | A 90-second guide, no new gear required. | Genuinely useful even if they never buy. That’s what keeps a newsletter opened. |
| This week: the bread, the podcast, the playlist | Three things our team can’t stop talking about. | A short, predictable format builds a habit. Use it consistently. |
| We asked a dietitian about protein timing | Her answer surprised us (and simplifies things). | Expert-led content with honest curiosity in the preview. |
| Behind the scenes: our new roastery | Photos from the first week, and a discount for reading. | Brand story plus a small reward for engaged readers. |
Fun subject lines, used sparingly: “Our warehouse cat has opinions about the new range” works for a playful brand with an audience that enjoys that voice. It won’t work for a clinical skincare brand. Fun is a brand choice, not a tactic.
How to write your own ecommerce subject lines
The lines above follow a handful of patterns you can reuse. Pick one lever per subject line:
| Lever | Pattern | Example |
|---|---|---|
| Offer | [Number] off [scope] until [deadline] | 20% off all bedding until Sunday |
| Object | [Product] + [what’s new about it] | The Ridge boot, now waterproof |
| Deadline | [Time left] + [what ends] | 3 hours left on free shipping |
| Identity | [Who it’s for] + [what they get] | For our subscribers: early access opens now |
| Question | A real question the reader has | Which magnesium is right for sleep? |
| Proof | [Number] + [outcome from customers] | Why 2,000 reviewers sized up |
A few rules that separate the lines that work from the ones that look like spam:
- One idea per line. “20% off + free shipping + new arrivals + gift guide” is four emails pretending to be one.
- Sentence case. One capitalised word for emphasis at most. Whole lines in caps read as shouting and look like spam.
- One exclamation mark, maximum. The offer carries the excitement.
- Personalise with a fallback. In Klaviyo,
{{ first_name|default:'there' }}stops “Hey , your cart” from reaching subscribers without a name on file. - Don’t fake a thread. Gmail’s sender guidelines say not to start subject lines with “Re:” or “Fwd:” unless the email really is a reply or forward.
- Health brands: watch the claims. “Cure”, “miracle” and “melts fat” are a compliance problem before they’re a deliverability problem.
Spam trigger words matter less than most lists suggest. Mailbox providers filter mainly on sender reputation, authentication and engagement, which we cover in why Klaviyo emails go to spam. A clean subject line won’t rescue a send to a disengaged list.
Test, don’t guess
No list of subject lines, including this one, knows your customers. The only reliable way to choose between two good lines is to test them on your own list, one variable at a time, and log what you learn. Our guide to A/B testing email subject lines covers sample sizes, winner metrics and how to build a testing log that compounds.
Before you test, run both options through the subject line tester to catch truncation, caps, punctuation and personalisation problems. Then let the list decide.
For the words underneath the subject line, read our guide to email copywriting for ecommerce, or browse ecommerce email marketing examples by email type.
Subject lines are one of the easiest things to improve and one of the smallest levers in the programme. If your opens are fine but revenue per recipient isn’t, the gap is usually in flows, segmentation or deliverability. That is the work our ecommerce email marketing agency does every day, and the free Klaviyo audit will show you where your biggest gap is.
/ Frequently Asked Questions
Q.01 What makes a good sale email subject line? +
/ Answer
A good sale subject line states the offer in the first 30 to 40 characters, says what it applies to, and gives one honest reason to act now, usually the end date. "25% off every serum until Sunday" beats "Our biggest sale is here" because the reader knows the deal before opening. Use the preview text for the second detail, such as free shipping or exclusions.
Q.02 How long should an ecommerce email subject line be? +
/ Answer
Short enough that the important words survive on a phone. Most phone inboxes show roughly the first 30 to 45 characters before truncating, depending on the app and screen size. There is no penalty for a longer line as long as the first part carries the message. Put the offer or the product first and let the preview text finish the thought.
Q.03 Should I use emojis in ecommerce subject lines? +
/ Answer
One relevant emoji can help a promotional line stand out, and many ecommerce brands use them successfully. Two or more usually looks cluttered and wastes visible characters on mobile. Emoji also render slightly differently across devices. Treat it as a test rather than a rule: run one emoji against none on the same segment and keep whichever wins on clicks and revenue.
Q.04 Does putting the subscriber's first name in the subject line help? +
/ Answer
Sometimes. A first name can lift attention, especially with engaged subscribers, but it has become common enough that it no longer stands out on its own. Always set a fallback so subscribers without a name on file do not see "Hey , your order". In Klaviyo that is the default filter, for example {{ first_name|default:'there' }}. Test it by segment rather than assuming it wins.
Q.05 What are the best newsletter subject lines? +
/ Answer
The best newsletter subject lines sell the single most useful thing inside, not the fact that a newsletter exists. "The 4-minute cold brew method we swear by" gives a reason to open; "October newsletter" does not. Lead with one specific story, tip or product, keep the brand consistent in the from name, and use preview text to hint at the second item.
Q.06 Are misleading subject lines illegal? +
/ Answer
In the US, the FTC's CAN-SPAM guidance says the subject line must accurately reflect the content of the message, and each violating email can carry penalties of up to $53,088. Fake urgency, invented order updates or a false "Re:" all create legal and trust risk. Other countries have their own rules. This is general information, not legal advice.
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