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Websites4 August 20268 min read

Why a Slow Website Is Costing You Customers

Slow websites lose enquiries and rankings. What counts as slow, the usual culprits, how to test your own site in two minutes, and what actually fixes it.

Why a Slow Website Is Costing You Customers

Think about what you do when a page does not load. You do not wait patiently admiring the spinner. You hit back and try the next result. Your customers do exactly the same thing, and most of them are doing it on a phone, on mobile data, standing in a car park.

Speed is the least visible thing about a website and one of the most expensive to get wrong. You never see the enquiries you lost, because those people never arrived. Here is how to tell whether yours is slow, what is usually causing it, and what genuinely fixes it.

What "slow" actually means

You do not have to guess. Google publishes the thresholds it uses, known as Core Web Vitals, and they are worth knowing because they are measured on real visits from real phones:

  • Largest Contentful Paint (LCP), essentially how long until the main thing on screen appears. Good is 2.5 seconds or less. Over 4 seconds is rated poor.
  • Interaction to Next Paint (INP), how quickly the page responds when someone taps something. Good is 200 milliseconds or less.
  • Cumulative Layout Shift (CLS), how much the page jumps around while loading. Good is 0.1 or less. This is the one that makes people tap the wrong button.

If your homepage takes five or six seconds to show anything useful on a phone, you are not in a grey area. You are losing people before they read a word.

Why it costs you money

Three separate things happen when a site is slow, and they compound:

  • People leave. Every extra second of waiting loses a slice of your visitors, and the ones who leave were often the ones in a hurry, which for a trade means the ones with an urgent job.
  • Fewer of the ones who stay make contact. A sluggish, jumpy site feels unprofessional, and that feeling transfers to how people judge your work.
  • Google notices. Page experience is one of the signals Google uses. To be honest about it, relevance and content matter more than speed, so a fast site will not outrank a genuinely better one. But when two local businesses are otherwise evenly matched, speed is a tiebreaker you can control. There is more on the wider picture in our guide to getting found on Google.

The usual culprits

In practice, slow small business sites nearly always come down to the same handful of things:

  • Huge unoptimised images. This is the number one cause, by a distance. A photo straight off a phone or camera can be 4 or 5 megabytes. Displayed at 800 pixels wide, it should be perhaps 60 kilobytes. Multiply that mistake by a gallery of job photos and the page is enormous.
  • Cheap shared hosting. If your site sits on an overloaded budget server, everything else you fix is limited by how long the server takes to respond in the first place.
  • Page builder and plugin bloat. Drag and drop builders add layers of code, and every extra plugin brings its own scripts and styles. It is a real trade-off of these platforms, which we covered in Wix versus hiring a designer.
  • Third-party scripts. Chat widgets, tracking tags, review carousels, embedded maps, hosted fonts. Each one is a request to somebody else's server, and your page waits for them.
  • No caching. Without it, your server rebuilds the same page from scratch for every single visitor.

Test your own site in two minutes

Open Google PageSpeed Insights, put your address in, and read the result. Two things matter about how you do this:

  1. Look at the mobile tab, not desktop. Mobile is where most of your visitors are and where the scores are always worse.
  2. Do not judge by your own experience of the site. You load it on office wifi with everything already cached, so it feels fine to you. That is not what a new visitor on mobile data gets.

Also try it on your phone with wifi turned off, in the middle of the day. That is the honest test.

What actually fixes it

In rough order of how much difference they make for the effort involved:

  • Fix the images. Resize them to the size they are actually displayed at, save them as WebP, and lazy load anything below the fold. On most small business sites this one step is transformative.
  • Get decent hosting. Not necessarily expensive, just not oversold. We host on Microsoft Azure, which is a large part of why our sites respond quickly.
  • Remove what you are not using. Every plugin, widget and tracking tag you do not genuinely need is pure cost.
  • Do not load tracking before consent. This helps speed and it is also what the cookie rules require, which is a nice overlap. See what your website legally needs in Spain.
  • Turn on caching, and use a CDN if you serve visitors from more than one region.
  • Reserve space for images by setting their dimensions, so the layout stops jumping while things load.

Frequently asked questions

How fast should my website be?

Aim for the main content appearing within 2.5 seconds on a mobile connection. Under 2 seconds feels genuinely quick. Anything over 4 seconds is costing you visitors.

Does website speed really affect SEO?

Yes, but keep it in proportion. Speed is a ranking signal through page experience, while relevance and content quality carry more weight. Its biggest effect is usually on conversions rather than rankings: the same traffic, more enquiries.

Why is my Wix or WordPress site slow?

Usually the platform overhead plus a heavy theme, several plugins and unoptimised images. Both can be made considerably faster, mainly by fixing images and cutting plugins, though you have less control over the underlying platform than with a purpose-built site.

Do photos really slow a website down that much?

Yes. Images are typically the majority of a page's weight, so they are almost always the first place to look. Properly resized and converted to WebP, a gallery can shrink by 90 percent with no visible loss in quality.

How much does it cost to fix a slow website?

Often less than people expect. Image optimisation and removing unused scripts is usually a few hours of work. If the root cause is the hosting or a fundamentally bloated build, it can mean moving host or rebuilding, which is a bigger conversation.

A fast site is not a luxury, it is the difference between a visitor becoming an enquiry and quietly disappearing. Every site we build is optimised and hosted properly as standard, so speed is not something you have to think about. Take a look at our websites, or get a free consultation and we will happily tell you what is slowing your current one down.

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