B2B Cold Email Subject Lines: 6-Word Lines, Free Review and Audit Examples

Subject lines should look like they came from a colleague, not a marketer. Short, specific and calm wins. Here are examples for three common B2B situations.

6-word subject lines for B2B cold email

• "Quick question about your booking page"
• "Idea for the Plano location launch"
• "Your site on mobile, found something"
• "Saw you're hiring SDRs, one thought"
• "Preview of your new homepage, Maria"
• "Cutting month-end close for your team"

Shorter (2–4 words) often works just as well: "booking page", "quick question", "homepage preview".

"Free review, no obligation" subject lines

Words like "free" and "no obligation" can look salesy. Use them sparingly and make them specific:

• "Free review of your Google listing"
• "Website review for Bright Smile, no strings"
• "5-minute review, nothing to sign"
• "Your free audit is ready"

Subject lines for tax recovery audit offers

• "Possible overpaid sales tax at [Company]"
• "Recovery review for [Company]'s last 3 years"
• "Tax refund check, results first"
• "Question about [Company]'s VAT reclaims"
• "Audit found savings for similar distributors"

For tax and finance offers, credibility matters: avoid exaggerated amounts and be clear about fees (e.g. contingency).

Rules of thumb

• Under 50 characters
• No ALL CAPS or multiple exclamation marks
• Personalise with company or project, not just first name
• Match the subject to the first line

More: cold email subject lines for web design.