Promotional Email Subject Lines: 30 Examples for Sales, Launches and Deadlines

The best promotional email subject lines make the offer or the news clear in a few plain words and sound like a person wrote them. Say what the promotion is, like "25% Off Starts Now" or "The [Product Name] Is Here", use the preview text to add the detail, and only use urgency when the deadline is real. Then change the angle as the promotion goes on: the offer first, then the product, then the deadline.

Most sale emails look the same in the inbox.

"HUGE SALE!!!" "Don't miss out!" "Our biggest sale ever 🔥"

Nobody can tell them apart, and after a few of them, nobody tries.

A promotional subject line has a simple job: tell people what's going on and give them a reason to open now. Below are the subject lines we'd start with for sale launches, early access, mid-sale emails, deadlines, plain-text emails and product launches, each with preview text. Plus what to avoid, how to write a resend and how to test them.

By Emiel Dingemans, Founder of Magicianly

Updated October 2026

What Makes a Good Promotional Email Subject Line?

A good promotional subject line says exactly what the promotion is, in plain words, without shouting.

Here's what we check before any promotional subject line goes out:

• The offer or the news is clear. If the email is about 25% off, the subject line or the preview text says 25% off. Don't make people decode it.
• It's short. We usually keep subject lines to 2 to 5 words, so the important part survives on a phone screen.
• It sounds like a person. Would a friend send this subject line to another friend? A friend would say "25% off starts now", not "🔥 MEGA SALE ALERT 🔥".
• It matches the email. If the subject line says the sale ends tonight, the first thing in the email is the offer and the deadline.
• The urgency is real. Only say "ends tonight" if it actually ends tonight.
• The preview text adds something. Use it for the detail the subject line has no room for, like what's included or when it ends. Here's how we write email preview text.

Should a Promotional Subject Line Mention the Discount?

Yes, when the discount is the reason for the email. Hiding a sale behind a vague subject line doesn't make it more interesting. It just makes it harder to understand.

What you want to avoid is the way most brands mention it. All caps, three exclamation marks and a fire emoji look like marketing to the reader and to inbox filters. Gmail is getting better at spotting promotional intent, and a subject line that screams about a sale is the easiest one to spot.

So say the offer, but say it like a person: "25% off starts now", not "HUGE 25% OFF SALE!!!"

And don't put a discount in every subject line. If every campaign is a sale, people learn to wait for the next one. For many brands, around one dedicated sales event per month is already enough. Here's how we plan the rest of the calendar in our email marketing campaign strategy.

What Subject Lines Work for a Sale Launch?

The launch email gets the most attention of the whole sale. Say what it is and when it ends.

The 25% is an example. Use your real offer. Only say "no code needed" if the discount really applies automatically.

What Subject Lines Work for Early Access?

Early access gives your best subscribers a reason to open before everyone else. The subject line should make it clear they're getting in first.

Only send early access if the early access is real. If the public gets the same sale at the same time, call it a launch.

What Subject Lines Work in the Middle of a Sale?

Change the angle. If the launch email was about the offer, the next one can be about a product. Someone who ignored "25% off" might still open an email about the one product they've been looking at.

Only use "selling fastest" or "back in stock" when it's true. Your subscribers will notice if every product is always about to sell out.

What Subject Lines Work for the Last Day of a Sale?

The deadline email is where real urgency belongs. Say when it ends, in plain words.

If you extend the sale after sending "Ends Tonight", you're teaching your list that your deadlines don't mean anything. Here's more on why real urgency works better than fake scarcity.

What Subject Lines Work for Plain-Text Sale Emails?

During a sale, we like to mix a short plain-text email in with the designed ones. It stands out in an inbox full of sale banners and takes far less time to produce. The subject line should look like a message from a person, so lowercase and no punctuation tricks.

Lowercase is on purpose. This email should look like it was typed, not designed.

What Subject Lines Work for Product Launches and Restocks?

Not every promotion needs a discount. A product launch or a restock is news on its own, so the subject line just needs to name the product.

Use "You Asked, We Made It" only if customers really asked for it. A short line about what they asked for makes the email much stronger.

How Do You Write Subject Lines for a Resend?

Change the subject line and the preview text, and change the angle while you're at it.

During big moments like Black Friday, we resend the most important emails later the same day, like the launch, the deadline and the last chance. The email can be the same. The subject line shouldn't be. If the first send was offer-led, like "25% Off Starts Now", the resend can be product-led, like "The [Product Name] Is on Sale", or deadline-led, like "Ends Tonight".

The same goes for a whole sale weekend. Lead with the offer on day one, make it more product-focused in the middle, and make it about the deadline at the end. Here's how we plan the full Black Friday email schedule.

And when a campaign works, reuse it. Take an old winner, keep the core angle that made it work, and give it a fresh subject line.

Which Promotional Subject Lines Should You Avoid?

• All caps and stacked punctuation. "HUGE SALE!!!" looks like marketing to the reader and to inbox filters.
• Fake urgency. "Last chance" on a sale that comes back next week teaches people to ignore your deadlines.
• Misleading subject lines. A fake "Re:", "Order confirmed" or "Your account" gets the open and loses the trust.
• Vague hype. "You won't believe this" or "Something big is coming" says nothing about what's inside.
• The same subject line in every send. If people ignored "25% Off Starts Now" this morning, they'll ignore it tonight too.
• A discount in every subject line. If every email is a sale, the sale stops meaning anything.

For the principles behind all of this, here are our email subject line best practices.

How Should You Test Promotional Email Subject Lines?

Test meaningfully different angles, not small wording tweaks. "25% Off Today" vs "25% Off Today!" won't teach you much. Tests worth running:

• offer-led vs product-led ("25% Off Ends Tonight" vs "Your Favorite Is on Sale")
• the offer in the subject line vs in the preview text
• urgency vs no urgency
• a number vs no number
• a plain-text email vs a designed email

Wait until each variation has around 1,000 recipients before you call a winner, and judge it on placed order rate and revenue per recipient, not open rate. A subject line that gets more opens but fewer orders didn't win. Here's how we run email A/B tests in general.

And keep it in proportion. The offer, the products and who you send it to usually matter more than the wording of one subject line.

So What Are the Best Promotional Email Subject Lines?

• Make the offer or the news clear in a few plain words.
• Write like a person, not a banner ad. No all caps, no stacked punctuation.
• Use the preview text for the detail: what's included and when it ends.
• Change the angle during a sale: offer first, then product, then deadline.
• Give every resend a new subject line and preview text.
• Only use urgency that's real, and don't put a discount in every subject line.
• Test angles, not punctuation, and judge on placed order rate, not opens.

If you're writing flows next, here are our welcome email subject lines and abandoned cart email subject lines.