Lumpy mail with a branded pen gets 4–8× more responses than a standard flat letter. Use this calculator to see what that means for your bottom line.
Your Campaign
Your price tier: 500–999 letters
£2.35 / letter
Apply FIRST10 — 10% off first campaign
Your Projected Results
Campaign Cost
£1,175
Expected Responses
20
Expected Revenue
£10,000
Return on Investment
751%
You only need 0.5% response rate to break even — that's just 3 customers from 500 letters.
Industry benchmarks
Standard flat letters typically get 0.5–1% response rates. Lumpy mail with a physical item (like a branded pen) averages 4–8% — and some warm-list campaigns hit 10–15%. The default 4% in this calculator is conservative for lumpy mail.
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