The Two Numbers
Enterprise technology decisions often stall on cost. Migration projects require budget, timeline, and organizational commitment. But the cost analysis is incomplete when it only counts the migration side of the ledger. The other side — the cost of not migrating — is measurable, documented, and in the case of WordPress, statistically significant.
The Migration Side
Migration cost varies by site complexity, but industry benchmarks provide a range. A WordPress-to-static-generator migration (Hugo, Astro, Eleventy) for a content-heavy site with 500 to 2,000 pages typically costs $50,000 to $150,000 in agency or contractor fees, takes 3 to 6 months, and reduces annual hosting and maintenance costs by 40 to 70%. A WordPress-to-headless migration (keeping WordPress as a content API, building a Next.js front end) costs $100,000 to $300,000 and takes 4 to 9 months. A full WordPress replacement for a complex site with e-commerce, membership, and custom integrations costs $200,000 to $500,000 and takes 6 to 12 months.
These are significant investments. They are also bounded, predictable, and one-time costs. The migration has a defined end state, a measurable improvement in security posture, and an ongoing reduction in maintenance overhead. The risk is project risk — delays, scope creep, integration issues — not existential risk. A migration that runs 50% over budget is a $300,000 problem. A breach that goes 50% over average is a $7.3 million problem.
The ongoing savings after migration are often underweighted in the decision. Managed WordPress hosting for an enterprise site runs $500 to $2,000 per month. Plugin licensing (forms, SEO, security, caching, backup) adds $200 to $800 per month. Security monitoring specific to WordPress vulnerabilities adds another $300 to $1,000 per month. A static site on a CDN costs $20 to $50 per month with no plugin licensing and no WordPress-specific security monitoring. The annual cost savings range from $12,000 for a simple site to $40,000 or more for a complex enterprise deployment. Over three years, these savings offset 20 to 40% of the initial migration cost.
The Breach Side
The breach cost is neither bounded nor predictable. IBM's 2024 report places the global average at $4.88 million, but that figure masks extreme variance. Healthcare breaches averaged $9.77 million. Financial services averaged $6.08 million. The United States averaged $9.36 million per breach — nearly double the global mean. These figures include direct costs (forensics, notification, legal) and indirect costs (customer churn, reputational damage, regulatory fines) over a multi-year measurement period.
The Probability Factor
WordPress disclosed 66 new CVEs in the last 12 months. Its WebPulse security score is 25.0 — the lowest of any tracked framework. Each CVE represents a potential entry point. Each plugin installed on a WordPress site extends the attack surface by the plugin's own vulnerability history. The average WordPress site runs 20 to 30 plugins, each with its own CVE trajectory. The probability of a breach for any single WordPress site in any given year is not calculable from public data alone, but the aggregate exposure is: 7.4 million WordPress sites, 66 new CVEs per year, an unknowable number of unpatched instances.
Kaspersky's Q1 2026 data reported that 43.7% of attacks enter through web applications. WordPress, as the web's dominant application platform at 74.3% of detected sites, absorbs a disproportionate share of that attack traffic. Attackers build automated scanning tools that target WordPress specifically because the return on effort is maximized — a single exploit technique can be deployed against millions of sites running the same codebase, the same plugins, and frequently the same vulnerable configurations. The question is not whether WordPress sites will be breached. The question is which ones and when.
The Executive Arithmetic
A $200,000 migration to a framework scoring 83 or higher on WebPulse — Next.js at 80.8, Astro at 83.1, FastAPI at 83.8 — represents 4.1% of the average US breach cost. A $500,000 migration for a complex site represents 5.3% of the average US breach cost. Even the upper bound of migration cost is a single-digit percentage of the average cost of the event the migration is designed to prevent.
This arithmetic does not account for the ongoing cost savings from reduced maintenance, eliminated plugin licensing, lower hosting costs, and reduced security monitoring overhead. It does not account for the opportunity cost of security team hours spent patching WordPress instead of building capabilities. And it does not account for the reputational and regulatory consequences that fall outside IBM's measurement framework.
The migration cost is knowable and finite. The breach cost is variable and recurring. Every year the WordPress site remains in production, 66 new CVEs accumulate against it. Each CVE that goes unpatched — because the patch breaks a plugin, because the update was deferred, because the team was working on something else — becomes a potential entry point with a $4.88 million average consequence. The arithmetic is not close. The only question executives should be asking is not whether to migrate, but how quickly the migration can be completed.
