What a slow website costs you

“It’s a little slow” is the most expensive sentence in web development, because slowness doesn’t announce itself. Nobody fills out a contact form to tell you they left because the page took four seconds to load. They just leave, and you never see them. The cost is real, measurable, and almost always larger than the cost of fixing it.

Speed is a conversion problem, not a tech problem

The data here is old, consistent, and boring: every additional second of load time costs you conversions. Visitors abandon slow pages, and the abandonment rate climbs steeply with each second. A site that loads in one second converts meaningfully better than the same site at three seconds, which converts far better than the same site at five.

This isn’t a benchmark you chase for pride. It’s revenue. If a slow site converts at half the rate of a fast one, you’re paying for every visitor twice, once to get them there, and again in the half you lose to a loading spinner.

Slow sites cost you in search, too

Google uses page experience as a ranking signal, and Core Web Vitals, the specific metrics that measure loading, interactivity, and visual stability, are part of how it decides who ranks. A slow site is fighting an uphill battle in search rankings against faster competitors selling the same thing.

So the cost compounds: a slow site ranks lower, so fewer people find it, and the ones who do convert at a lower rate. You’re losing at the top and the bottom of the funnel simultaneously.

If you run ads, slow pages tax every click

This is the one that surprises people. Ad platforms score the quality of your landing pages, and load speed is part of that score. A slow landing page gets a worse quality score, which means you pay more per click for the same placement. You’re literally paying a slowness tax on your ad budget, on top of the conversions you lose when the slow page finally loads.

For anyone running paid acquisition, this alone usually justifies a rebuild. The math is direct: faster pages, lower cost per acquisition.

”Fast enough” has an actual definition

Speed isn’t infinitely valuable, past a point, humans can’t perceive the difference. So “fast enough” has a practical target:

• Largest Contentful Paint under 2.5 seconds, the main content is visible quickly.
• Interaction to Next Paint under 200ms, taps and clicks respond immediately.
• Cumulative Layout Shift under 0.1, the page doesn’t jump around as it loads.

Hit those and you’re in the green zone where speed stops costing you. The frustrating part is that most slow sites aren’t slow because the target is hard, they’re slow because of bloat that was never necessary: a dozen tracking scripts, a heavy page builder, unoptimized images, a framework shipping megabytes of JavaScript to render what could have been plain HTML.

The cheapest speed is the speed you don’t have to claw back

The reason we build marketing sites the way we do, static HTML, almost no JavaScript by default, is that it makes “fast” the default state instead of a problem to solve later. You don’t optimize your way to a fast site at the end; you start with one and keep it that way.

If your site is slow and you’re not sure what it’s costing you, the answer is almost always “more than the fix.” We build fast sites as a baseline, not a premium add-on. Tell us what you’re working with.