Organised by psychological formula so you know why each one works — not just what it is. Copy the template, fill in the blanks, and test.
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21.3%
Avg email open rate across industries
40%+
Open rate achievable with tested subject lines
6–10 words
Optimal subject line length for mobile
Creates an information gap the brain feels compelled to close. Best for newsletters and content emails.
I shouldn't share this, but…
The [topic] mistake you're probably making right now
This changes everything about [topic]
What [successful person/group] knows that you don't
Why [common belief about topic] is completely wrong
The uncomfortable truth about [topic]
Nobody talks about this part of [topic]
Your [product/strategy/approach] might be doing the opposite of what you think
I finally figured out why [common problem] keeps happening
Drives action through loss aversion. Use with offers, deadlines, or limited availability.
[X] spots left — closes midnight
Last call: [offer] ends tonight
We're removing this [tomorrow / at midnight / Friday]
Don't miss: [X]% off ends in [timeframe]
Offer expires in [X] hours — no exceptions
[X] people grabbed this today. [Y] spots left.
I'm closing this down after [date]
The price goes up tomorrow — here's your last chance
Leverages FOMO and herd psychology. Strongest when you have real, specific numbers.
[X,000] people tried this last week. Here's what happened.
Why [number] [audience type] switched from [competitor] to [product]
This is what [recognisable name / company] does instead of [common approach]
[X] readers asked the same question. Here's the answer.
The strategy [X] used to [result] — breaking it down
From [pain state] to [outcome]: [person]'s story
How [company/person] went from [before] to [after] in [timeframe]
[X] case studies. One pattern. This is what separates them.
Pattern-interrupts the inbox. Works best for segmented lists where you know something about the reader.
[First name], did you see this?
Quick question for you, [First name]
Based on what you've been reading…
You mentioned [topic] — I thought of you
This one's specifically for [audience segment]
For [audience segment] who are serious about [goal]
[First name] — following up on [previous email topic]
Open loops in subject lines generate up to 20% higher open rates. Forces the brain to want resolution.
Are you making this [topic] mistake?
What would you do with [X] extra hours per week?
Is your [strategy / tool / approach] actually working?
How much is [common problem] costing you per month?
Have you tried [tactic]? Here's what we found.
What's the one thing stopping you from [desired outcome]?
Why do some [audience segment] succeed while others don't?
Emotionally charged subject lines see the highest open rates in most niches. Use sparingly to preserve trust.
Unpopular opinion: [statement]
[Common advice] is overrated. Do this instead.
I disagree with almost everything said about [topic]
Hot take: [bold claim about your industry]
Stop [commonly recommended action]. Here's why.
The [topic] advice I used to give was terrible. I was wrong.
Everyone's doing [thing]. There's a reason the results are average.
Controversial: [statement that challenges a norm in your niche]
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