ROI Calculator
Size the prerendering value before you commit.
Five inputs from your site, three output ranges that cover indexation lift, traffic uplift, and engineering hours reclaimed. The math is heuristic, not a prediction — use it to decide whether the conversation is worth having, not to forecast Q3 revenue.
Inputs
Tell the calculator about your site.
Total monthly pageviews across the site. Use Google Analytics or server logs.
Compressed JS shipped per route. Higher bundles correlate with slower TTI and reduced crawler patience.
Share of crawl that lands on duplicates, faceted noise, or routes Google chooses not to index. Use Search Console "Crawled, not indexed" + "Discovered, not crawled" as a starting point.
Fully loaded cost (salary + benefits + overhead) per engineer hour. US senior typical: $120-180.
Time the team currently spends triaging crawl drops, canonical bugs, render regressions, and adjacent firefighting.
Estimated outcomes
What prerendering and a clean rendering layer typically return.
Recovered crawl-budget share from removing duplicate, render-blocked, and indexation-incompatible routes.
Indicative pageview gain from indexation lift × 0.3-0.5 conversion-of-recovered-URL discount.
Time taken back from incident triage, canonical fires, render regression debugging.
Hours saved × hourly rate × 12 months. Excludes traffic-revenue gains from indexation lift.
These are heuristic ranges, not predictions. The right way to size prerendering value for your site is a 30-minute scoping call against the actual route inventory and current GSC data.
Read the full build-vs-buy cost analysisWhat the calculator assumes (and what it does not)
Assumes
- Crawl-budget waste is real and measurable in Search Console.
- Bundle size correlates with crawler patience and JS rendering reliability.
- A meaningful share of incident load has a rendering root cause.
- Engineering hours have an opportunity cost equal to the loaded rate.
Does not
- Predict Q3 revenue or replace a real forecast.
- Account for prerendering infrastructure cost (managed or self-hosted).
- Quantify the conversion rate of incremental traffic.
- Adjust for sites with weak topical authority or low product-market fit.
FAQ
ROI calculator questions, answered.
The FAQ on this page is meant to make the content easier to evaluate in practical terms. Instead of leaving important points implied, the answers below clarify the questions visitors usually have when they are comparing fit, understanding scope, reviewing expectations, or trying to decide what the next step should be after reading the page.
On a specialist services site, FAQ sections do more than fill space. They reduce friction between learning and decision-making. They help readers translate a page from marketing language into clearer operational meaning, which is especially useful on pages dealing with technical SEO audits, process, case studies, deliverables, legal terms, and trust-related information.
How accurate are these numbers?+
These are heuristic ranges based on patterns from real engagements, not precise predictions. They are designed to size the order of magnitude. The actual number depends on your route inventory, current rendering setup, and how much of the crawl-budget waste is recoverable on your specific stack.
Why is the indexation lift capped relative to crawl-budget waste?+
Not every recovered crawl-budget URL becomes an indexed page. Some URLs have weak intrinsic value, some have duplication that prerendering does not fix, and some take months to be re-evaluated. The 50-80% recovery factor accounts for that.
Why is traffic uplift discounted from indexation lift?+
Indexed pages do not all rank competitively, and ranked pages do not all attract their fair share of clicks. The 0.3-0.5x discount reflects the gap between "indexable" and "trafficable." For sites with weak topical authority, the lower end is more honest.
How was the engineering-hours-saved factor chosen?+
From observed reduction in recurring SEO incident load after prerendering rollouts: typically 40-70% drop in canonical-drift bugs, render-regression triage, and Search Console firefighting. The exact share depends on what fraction of incidents had a rendering root cause.
Does the calculator include the cost of running prerendering itself?+
No. It estimates gross savings, not net ROI. Prerendering infrastructure cost (managed service or self-hosted) and engagement cost both subtract from these numbers. The build-vs-buy article walks through both sides honestly.