B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
3.5%
3.5% -- transaction fee rate for Kit (formerly ConvertKit) (2026)
Kit (formerly ConvertKit) charges a 3.5% transaction fee rate on its free plan.
- Applies to Kit's free plan
- Subject to an additional $0.30 fixed fee per transaction
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
3.5%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Letterhead
Primary
Tier B
https://www.tryletterhead.com/blog/best-tools-for-newsletter-monetization.html ↗
Source Article
8 Best Tools for Newsletter Monetization (Reviewed for 2026)
8 Best Tools for Newsletter Monetization (Reviewed for 2026)
The days of judging a newsletter’s success by its open rate are over. Today, it’s about building a sustainable business. This requires a platform that does far more than just send emails. It needs to seamlessly manage payments, streamline …
Original Research
Letterhead
· Original study ↗
Methodology
Fee on Kit's free plan, plus $0.30 per transaction; documented in product review
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Kit (formerly ConvertKit): 3.5% transaction fee rate. Source: Letterhead (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/kit-transaction-fee-free-plan-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/kit-transaction-fee-free-plan-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>3.5%</strong> -- transaction fee rate for Kit (formerly ConvertKit)<br><small>Source: Letterhead (2026) · <a href="https://lighthousedata.io/data/kit-transaction-fee-free-plan-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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