Tailwind CSS vs writing custom CSS: when to choose which?

Short answer

Tailwind CSS accelerates development with utility classes and a design system out of the box. Custom CSS offers unlimited flexibility and is preferable for highly bespoke designs or when bundle size is critical.

Key differences

• Tailwind: Rapid prototyping, consistent spacing and colors, no naming fatigue, but HTML can become verbose. PurgeCSS keeps production bundles small.
• Custom CSS: Full creative control, cleaner HTML, but requires discipline to maintain consistency and avoid specificity issues.

When to use each

• Choose Tailwind for dashboards, admin panels, MVPs, and teams that value speed and consistency.
• Choose custom CSS (or CSS Modules / preprocessors) for brand-heavy marketing sites, experimental layouts, or strict performance budgets where every byte counts.

Tips

• Tailwind can coexist with custom CSS; use @apply to extract repeated utilities into components.
• Start with Tailwind's defaults and customize tailwind.config.js rather than overriding with arbitrary values everywhere.