WordPress updates are necessary, but the safest update process is not simply clicking every available button. Core, plugins, themes and PHP all interact. A change in one layer can expose an old compatibility problem in another.
A good WordPress update checklist protects the website before the change, controls how updates are applied, and tests the parts of the site that matter to the business afterward.
Before any update: know what you are changing
Open the update screen and list what is pending. Note WordPress core, plugins, theme updates and any hosting or PHP changes.
Read major plugin and theme changelogs when the update is significant. Pay particular attention to changes involving WooCommerce, page builders, forms, security, caching, multilingual tools and custom integrations.
If the site uses custom code, confirm whether that code depends on functions being changed by the update.
Take a current backup
Before significant updates, confirm that you have a recent backup of both files and the database where relevant.
The backup should be stored somewhere you can access even if the WordPress dashboard becomes unavailable. A backup that exists only through the broken website is not a useful recovery plan.
If the site changes frequently, such as an online store receiving orders, minimise the gap between the backup and the update window.
The wider WordPress maintenance checklist explains how backups fit into recurring site care rather than being created only during update emergencies.
Use staging for higher-risk changes
Staging is valuable when an update touches core functionality, checkout, membership, forms, custom code or a large group of plugins.
Update the staging copy first and test the same customer journeys you expect to protect on live. Make sure staging runs a comparable PHP version and plugin set so the test is meaningful.
For small low-risk sites, not every minor update requires a full staging cycle, but the business should still have a backup and post-update test plan.
Check PHP compatibility separately
PHP upgrades can improve support and performance, but they can also expose outdated code.
Do not combine a major PHP version change with many plugin and theme updates unless you have a good testing reason. Separating changes makes diagnosis easier if the site breaks.
Review plugin and theme requirements before the PHP change. Afterward, test the front end, dashboard, forms, scheduled tasks and any custom integrations.
Update WordPress core deliberately
WordPress core updates can include security fixes, bug fixes and feature changes. Keep core current, but treat major version changes with more attention than small maintenance releases.
On a business-critical site, review compatibility with essential plugins and the active theme before a major update.
After updating core, log back into the dashboard, check for database upgrade prompts and test the public site immediately.
Update plugins in manageable groups
Updating ten plugins at once saves clicks but makes troubleshooting harder.
Group lower-risk plugins or update important plugins one at a time. After changes to a form tool, test the form. After a WooCommerce update, test cart and checkout. After a caching update, clear caches and inspect key pages.
If the website shows an error after an update, the process in our guide to diagnosing a WordPress plugin conflict can help isolate the cause without random live-site changes.
Update the active theme carefully
Theme updates can change templates, CSS, JavaScript and WooCommerce overrides.
If customisations were made directly to theme files, an update may overwrite them. A child theme or other controlled customisation method should be used for changes that need to survive theme updates.
After updating, check the homepage, header, footer, mobile menu, page templates and any areas with custom styling.
Test forms after updates
Forms depend on WordPress, plugins, email configuration and sometimes external services. They should always be tested after significant updates.
Submit a real message. Confirm that the success state appears, the notification reaches the correct inbox and any CRM or automation integration receives the data.
If the business relies on several forms, prioritise the ones that generate sales or qualified enquiries.
Test eCommerce and payment functions
For WooCommerce websites, complete a controlled test order. Check product pages, cart, checkout, payment, order creation and email notifications.
If the store has subscriptions, memberships, bookings or custom shipping logic, include those flows in the test plan.
A successful plugin update in the dashboard does not prove that checkout still works.
Check front-end performance and layout
Updates can change scripts, styles and caching behaviour. Review mobile and desktop pages for visible layout shifts, missing assets and slow loading.
Clear the appropriate site, server and CDN caches where necessary. Then test as a normal visitor rather than only while logged in as an administrator.
Check scheduled tasks and integrations
Some WordPress sites depend on scheduled tasks for backups, emails, data feeds, inventory updates or external integrations.
After major updates, confirm that these processes are still running. A site can look normal while an important background task has stopped.
Review API integrations if the update affected authentication, endpoints or custom code.
Do not forget SEO checks
A normal plugin update should not change SEO configuration, but it is worth checking after major site changes.
Confirm that important pages remain indexable, canonical tags still point correctly, the XML sitemap is available and no staging noindex rule has been copied to production.
If URLs changed, make sure redirects and internal links point directly to the final destination rather than creating unnecessary chains.
Keep an update log
Record the date, versions changed, who performed the update and any issues found.
If a problem appears later, this log makes it easier to identify what changed around the same time. It also helps teams avoid repeating the same failed sequence.
When an update should be delayed
Do not delay security updates without a clear reason, but avoid scheduling large non-urgent updates immediately before a major campaign, long weekend or holiday closure.
If the site is stable and an update is not time-sensitive, choose a window when the team can monitor the result.
For businesses without internal technical coverage, WordPress support can help plan updates, test changes and recover from failures without turning the live site into a testing environment.
A simple update sequence
For many business websites, a controlled sequence looks like this:
- Record the current versions.
- Take a verified backup.
- Test high-risk changes on staging.
- Apply updates in manageable groups.
- Clear relevant caches.
- Test the public website.
- Test forms, checkout and integrations.
- Check logs and scheduled tasks.
- Record the result.
- Monitor the site after the change.
Frequently Asked Questions WordPress Update Checklist
Should I update WordPress core before plugins?
There is no universal sequence for every site. Review compatibility and the nature of the updates. The important point is to avoid changing everything blindly and to test critical functions after each meaningful group of changes.
Should I enable automatic plugin updates?
Automatic updates can be useful for selected plugins, especially when the site has reliable backups and monitoring. Higher-risk plugins may need controlled testing before updates are applied to production.
What should I do if the website breaks after an update?
Stop stacking more changes, record the error, check the most recent update and use your backup or rollback path where appropriate. Isolate plugin or theme conflicts on staging when possible.
How often should PHP be updated?
Keep PHP on a supported version that is compatible with WordPress, the active theme and required plugins. Treat major PHP changes as planned maintenance and test them before production on important sites.
Final takeaway
WordPress updates are safest when they are treated as controlled changes rather than routine button clicks. Back up first, understand what is changing, test high-risk updates, apply changes in manageable steps and verify the customer journeys that matter after every significant update.
That process takes a little longer than pressing Update All, but it dramatically reduces the time spent guessing when something breaks.
