Design should be refreshed (visual updates, component improvements) every one to three years and fully redesigned (information architecture, platform, technology stack) every two to five years, depending on industry, performance data, and competitive landscape. There is no universal number; the right cadence is driven by metrics, not calendar.
A refresh means re-skinning: updating colors, imagery, component styles, and content without changing the underlying structure. A redesign means structural overhaul: rethinking navigation, information architecture, and potentially migrating platforms. Content updates (blog posts, landing pages) should happen weekly to monthly. SEO audits should run quarterly. The trigger for a full redesign is performance-based: high bounce rates above 62%, two or more months of stagnating conversion rates, or a site that no longer reflects the current business model or brand positioning. Redesigning too frequently carries its own risk because search engines take weeks to months to re-index, and the site needs time to accumulate statistically significant analytics. Incremental changes minimize disruption, allow continuous optimization through A/B testing, and keep the experience fresh without forcing visitors to relearn the interface.