Custom WordPress Theme vs Premium Theme: What Should Agencies Choose?
At the start of almost every WordPress project, someone asks the same question: do we build a custom theme, or start from a premium one like Avada, Divi or Astra? The premium theme looks cheaper and quicker. The custom theme promises a better result. Which one is right depends on the project, the budget and what happens to the site after launch.
We build custom themes for a living, so we’re biased. We’ve still tried to be fair to premium themes below, because sometimes they’re the right call.
The two options
A premium theme is a commercial theme, usually a multipurpose one, sold with demo sites, a large options panel and often a bundled page builder. You adjust it until it looks like the design.
A custom theme is written from scratch for one site, around its design and its content. It contains what that site needs and nothing else.
Speed
A multipurpose theme has to support thousands of very different sites. All that flexibility means extra CSS, JavaScript and features that load whether you use them or not. You can optimise it, but you’re always pushing against the theme.
A custom theme loads only the code the design needs, which makes good Core Web Vitals far easier to reach. That matters for search and for conversions. Our guide to Core Web Vitals for WordPress explains why.
Design freedom
With a premium theme, the design tends to bend to the theme’s options. An unusual grid, a custom layout or detailed animation quickly turns into a stack of overrides.
With a custom theme it works the other way round: the build follows the design. If your agency sells on design quality, this alone often settles it.
Editing
Premium themes give clients a lot of control through big options panels and a page builder. Often too much: it’s easy to break a layout or wander away from the brand guidelines.
A custom theme can give clients exactly the controls they need through custom Gutenberg or ACF blocks, with sensible limits. The site still looks like the brand a year after handover.
Updates
A premium theme update can change styles or options and break your customisations, especially if someone edited the theme directly instead of using a child theme. And if the vendor loses interest, the client is left holding the risk.
A custom theme changes only when you change it. It lives in Git, it’s documented, and there’s no third-party release cycle to break it.
Cost
Premium themes are cheaper on day one, and for a simple site with standard layouts they can be the sensible choice. The saving shrinks once you need a custom design, good performance and stability over several years. Hours spent fighting a theme are still development hours.
A custom theme costs more up front, and usually less over the life of the site.
When a premium theme is fine
Go premium for very small budgets and simple brochure sites, for short-lived campaign or event sites, and when the client has already picked a theme and only wants small changes.
When custom is the better bet
Go custom when there’s a bespoke design, especially one from Figma; when speed and SEO matter; when the client will edit the site often; when the site is expected to grow for years; and when you’re replacing a theme that’s already slow and bloated.
Explaining it to the client
Clients don’t care much about themes. They care about results. Put it in business terms: a faster site that ranks and converts better, a design that matches their brand exactly, and editing that’s hard to get wrong.
If your team is busy
If your team is busy, we can build the custom theme for you, under your brand. See how we approach custom WordPress theme development and how we convert Figma designs into WordPress.
