Methodology

1. Pricing sources

Calculator outputs are computed deterministically from publicly published vendor pricing: monthly and annual rate cards, included task or execution allowances, contact-tier brackets, and compute resource baselines. Rate cards are reviewed periodically; corrections are welcome at partners@tcoaudit.com.

2. Formula independence

Partner compensation never alters the formulas. If your inputs show that staying on your current platform or self-hosting is cheaper than a partner product, the calculator shows that figure.

3. How each tool calculates

• SaaS Tax Calculator: per-step platforms (Zapier, Make) are billed on tasks × steps; per-execution platforms (n8n) on full workflow runs; email and CRM tools on their published contact tiers. 36-month totals are monthly cost × 36, with no assumed discounts.
• Outbound ROI Sizer: assumes a safe sending limit of 30 emails per inbox per day across 22 business days a month, three inboxes per domain, and your stated reply-to-meeting rate.
• SEO & AI Grader: fetches only public headers, HTML metadata, /robots.txt, and /llms.txt for the URL you enter, then scores response time, canonical and metadata integrity, structured data, and AI-crawler access.

4. Limits

Results are estimates. Vendor prices change, negotiated contracts differ, and migration labour is not included. Verify current pricing with each vendor before purchasing.