Time is Money: How Page Speed and Psychology Influence Your Business

Christian Hohn is an Experience Design Lead at Amazee Labs with over 20 years of UX and design experience. He creates award-winning, accessible cross-device web solutions, and believes empathy and experience are essential to designing truly effective solutions that meet user needs. / Feb 12, 2025

Why Slow Load Times Cost More Than Just Seconds

As an Experience Design Lead at Amazee Labs – and a bit of a performance enthusiast – I know all too well how loading spinners, jerky animations, and hidden “Please Wait…” messages can push us to the brink. At first glance, this may seem like a purely technical problem. In reality, it has a lot to do with psychology – and with how we humans respond to delays.

Time Is Precious – Even Digitally

According to current studies, around 53% of users will abandon a website if it takes longer than three seconds to load. And if they’re on a smartphone, they tend to switch tabs even more quickly. The reason lies in our cognitive expectation that the internet should deliver content instantly. While we used to wait patiently through slow modem noises in the past, we’ve become far more impatient today if things don’t appear in the blink of an eye.

Fun Fact: The average web user believes they spend two days a year waiting for pages to load. Never underestimate the frustration that builds up with each additional second of delay.

Web Stress and Flow Killers

When we’re working on a web project or shopping online, we want to stay in the flow – focused, purposeful, and efficient. Slow loading times act like tiny pinpricks, continually pulling us out of that state. This leads to irritation, decreased motivation, and, in the worst cases, so-called “rage clicks”, where we repeatedly hammer the same button in hopes of finally getting a response.

Recent findings indicate that users in a digital context may even develop physical signs of stress (such as an increased heart rate) if pages take too long to load. It may sound dramatic, but it’s a natural reflex: our brains simply aren’t designed to wait endlessly for something that we expect to appear “instantaneously.”

Important Metrics at a Glance

In recent months, Google has adjusted its performance metrics to place even greater emphasis on real user interactions. The Core Web Vitals remain central, but a key new metric is INP (Interaction to Next Paint).

  • LCP (Largest Contentful Paint): How long does it take for the largest visible element on the screen to render?
  • CLS (Cumulative Layout Shift): How much do elements “jump” around on the page while it’s loading?
  • FID (First Input Delay): How quickly does the website respond when users first click or type something?
  • INP (Interaction to Next Paint): A relatively new measure of how quickly a page reacts after every user interaction.

If we keep track of these metrics and optimise them in good time, we can positively influence both the user experience and key business metrics (such as conversion and engagement). A high INP value, for example, means that user interactions are often delayed – visitors end up waiting at every click, which leads to frustration and increased bounce rates. Conversely, by improving these figures, we can significantly enhance both user satisfaction and overall site effectiveness.

Tips for Smart Web Performance

Especially in everyday project work, it’s crucial to set realistic goals and work together on performance improvements. We should always keep the “total work of art” – the website – in mind, and focus on what visitors truly need when it loads:

  1. Prioritise Crucial Content: We load essential elements first (e.g., main navigation, key product information), so that our users can get started immediately.
  2. Use Lean Technologies: Together, we ensure that JavaScript bundles remain minimal, images are sensibly compressed, and servers are efficient.
  3. Avoid Cognitive Overload: We maintain a clean interface without constant reload effects, blinking banners, or unclear navigation that might confuse users.
  4. Provide Clear Loading Indicators: If something needs to be fetched, we show that clearly (with a progress bar or a subtle spinner), so there’s no uncertainty.
  5. Measure and Analyse Regularly: We continually test with tools like Lighthouse or WebPageTest to identify bottlenecks and address them systematically.

Conclusion – Performance Is a Sign of Respect

Good web performance means not stealing users’ time. It’s a blend of psychology and technology, because our digital impatience is real – and it’s growing all the time. A few well-implemented optimisations can work wonders: if your site loads quickly and responds smoothly, you’ll earn satisfied users and higher conversion rates.

So, the next time we embark on a website project or plan a relaunch, let’s think not only about stunning images and modern typography, but also about seamless performance. Our users – and their stress levels – will thank us. And in the best case, we’ll save them from those two “waiting days” each year, which they’d much rather spend doing something else – like continuing to enjoy their experience on our site.

If you’d like to explore how to optimise your site’s performance, feel free to reach out.

For more insights, watch this: Tammy Everts’ Talk “The Psychology of Web Performance” (btconf Berlin 2023)

I highly recommend Tammy Everts’ talk, “The Psychology of Web Performance”, presented at btconf Berlin 2023. In it, she draws on real-world studies (e.g. EEG headsets, facial coding) and relatable everyday scenarios to demonstrate how distorted our perception of loading times can be. One particularly intriguing example is the “Baggage Claim” experiment, where passengers were kept actively occupied instead of passively waiting – leading to a dramatic reduction in complaints.

Another standout is her explanation of the so-called “end effect”, highlighting how the final moments of any waiting period can profoundly shape our overall impression.

Key takeaway: waiting times are never merely “secondary” — they influence our concentration, our mood, and ultimately our user engagement. It’s well worth optimising not only on a technical level, but also from a psychological perspective – for instance, by providing clear feedback mechanisms, offering meaningful activities or distractions during loading, and ensuring a smooth conclusion to the user journey.

Sources
  1. Google Web.Dev: Introduction to INP
  2. DoubleClick (Google): Mobile Speed Study
  3. WebPageTest: Performance Measurement and Analysis
  4. Lighthouse (Google Chrome)
  5. Tammy Everts: The Psychology of Web Performance (btconf Berlin 2023)