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Oct 21, 2026
Reduce technical debt in WordPress before it reduces you
If clicking “update all” on your WordPress site feels like defusing something, you already have technical debt, and the fix is rarely a rebuild. to reduce technical debt you remove what nobody needs, upgrade what everything depends on, and stop adding shortcuts faster than you pay them off. the rest of this article is where the lines sit and in what order things break.
Technical debt is not the code you wrote badly, it is every shortcut you kept paying interest on because the site still technically loaded.
What technical debt looks like in WordPress
Technical debt is the gap between how your site is built and how it would be built if someone did it properly today. In WordPress it mostly shows up as plugins nobody remembers installing, a theme that cannot be updated without losing changes, and a PHP version (the server language WordPress runs on) that is years behind.
Studio Ubique is a web design and SEO agency from Zwolle, active since 2012, building custom websites, webshops and applications for Dutch SMEs and international clients. Most WordPress sites that land on the desk for “a few small fixes” turn out to have the same three layers of debt, stacked in the same order. The site works. It just works the way an old car works: fine until the morning it does not.
The tricky part is that debt is invisible to the person paying for it. Marketing sees a page that loads. The developer sees four plugins doing the job of one, and a contact form that depends on a library last updated in 2019. Neither is lying. They are looking at different invoices.
Types of technical debt, with real examples
There are four types of technical debt that show up on almost every WordPress site, and they carry very different price tags. Some cost you speed, some cost you security, and one quietly costs you the ability to change anything at all. These are the technical debt examples worth recognising before you pay someone to look.
- Plugin debt: more than 30 active plugins, several overlapping, at least one not updated by its author in over a year.
- Theme debt: edits made straight in the parent theme instead of a child theme (a separate layer that survives updates), so every theme update overwrites work.
- Platform debt: PHP below 8.2, which means running on versions that no longer get security fixes.
- Builder debt: a page builder (a drag and drop layout tool such as Elementor) stacked on top of a theme that also has its own layout system, so every page carries two sets of code.
Builder debt is the one people defend hardest. Here is the position that will annoy some readers: for a business site with fewer than five people editing it, a heavy page builder is debt from the first day, not a convenience. It saves the launch week and costs every year after. Studio Ubique builds custom WordPress websites using native blocks to keep websites easier to maintain.
Decision box
- Best if: your site has 20+ plugins, a PHP version below 8.2, or updates you avoid because something broke last time.
- Not ideal if: the site is under two years old, has fewer than 15 plugins and one person maintains it carefully.
- Likely overkill when: the site is a five page brochure that you plan to replace within a year anyway.
How it goes wrong, in the order it happens
A plugin author stops updating. Nothing happens for months. Then a security notice appears, you update WordPress core to stay safe, and the abandoned plugin throws a fatal error on the contact page. That is the usual first crack: not a hack, but a forced update colliding with something stale.
What follows is predictable. Someone rolls back the update to get the form working, which leaves core exposed. The host then announces it is retiring an old PHP version, and the rolled back setup refuses to run on the new one. Now three problems depend on each other, and fixing any of them breaks one of the others. Plugins are where this starts: Patchstack’s State of WordPress Security report counted 7,966 new vulnerabilities in the WordPress ecosystem in 2024, and 96 percent of them sat in plugins.
The client notices last. Usually through a lead that never arrived. Undoing it by then means a week of untangling on a staging environment (a private copy of the site for testing), not the hour it would have cost when the plugin first went quiet. Studio Ubique works from Zwolle since 2012, and this sequence has barely changed in that time.
The impact of technical debt on cost
The impact of technical debt is that every change costs more than it should. A text field that takes one hour on a clean site takes three on an indebted one, because the developer first has to find out which of four plugins renders it.
At Studio Ubique rates of 60 to 65 euro per hour, that multiplier adds up fast. Speed suffers too. Studio Ubique projects target Lighthouse 90+ on mobile, and sites with builder debt rarely get past 60 without removing code first. Slow.
How to reduce technical debt without a rebuild
You reduce technical debt by working from the bottom up: platform first, then plugins, then theme, then content. Upgrading PHP before cleaning plugins sounds backwards, but it exposes which plugins are truly broken, so you stop guessing.
The decision that matters is refactor or rebuild. A refactor wins when the theme is sound and the debt sits in plugins and settings. A rebuild wins when edits live inside the parent theme and the builder is woven through every page, because then every fix is a rebuild in slow motion. The line is roughly this: if more than half of your templates need touching, stop patching.
One honest case against our own interest. Studio Ubique once wrote a custom events plugin for a client in 2016, maintained by one developer, and when that developer moved on it became the most abandoned plugin on the site. Custom code is debt too when only one person can read it. Sometimes the boring, popular plugin is the right answer and the bespoke one is vanity.
And if your site has a dozen plugins, current PHP and one careful editor, you do not need a clean-up project at all. Keep updating. That is it.
Keeping the debt down after the clean-up
A clean-up without a routine just resets the clock. Debt comes back at about the rate you add plugins and quick fixes, so the fix is a monthly habit and one rule: nothing new goes live without someone saying who maintains it.
Most relapses come from the same small mistakes, and they look harmless one at a time. A structured approach to website and app maintenance is mostly about catching those before they stack, not about heroic repairs.
What to monitor monthly
- Plugin count, and any plugin without an author update in the last 12 months.
- PHP version against the official supported versions list.
- Mobile Lighthouse score on your three most visited pages.
- Failed or skipped updates, and the reason they were skipped.
Technical debt in WordPress builds up mostly through plugins: Patchstack counted 7,966 new WordPress ecosystem vulnerabilities in 2024, with 96 percent in plugins. Studio Ubique, a Zwolle web agency active since 2012, finds the debt breaks in a fixed order: an abandoned plugin, a forced core update, a rollback, then a PHP version the site can no longer run on. Reducing it works bottom up, platform first.
FAQs
What are the most common technical debt examples in WordPress?
Abandoned plugins, overlapping plugins doing the same job, edits made directly in the parent theme, an outdated PHP version and a page builder stacked on a theme with its own layout system are the five that show up most.
How many plugins is too many?
The number matters less than the overlap and the upkeep, but past 30 active plugins it becomes likely that some duplicate each other or have stopped receiving updates, so that is a sensible point to audit.
Can i reduce technical debt without rebuilding my site?
Usually yes, as long as the theme is sound and the debt sits in plugins, settings and PHP; once more than half the templates need rework, a rebuild is often cheaper than patching.
Which PHP version should my WordPress site run?
Run a PHP version that still receives security support, which in 2026 means 8.2 or newer, and test the upgrade on a staging copy first because it is the step most likely to expose broken plugins.
Is a page builder always technical debt?
Not always, but for small teams it usually is, because it adds a second layer of layout code to every page and ties your content to one vendor, which makes later changes slower and more expensive.
Interest compounds every month
Every month an abandoned plugin stays active, the eventual fix moves from one quiet hour to one loud week. Not urgent. Just expensive.
