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A freemium WordPress plugin passes the WordPress.org review when its directory package is a complete, useful, GPL-compatible product—not trialware—and any paid value comes from a genuinely substantial external service or a separately distributed add-on. Do not put a payment check, quota, trial timer, or license-validation endpoint in front of local features. Ship readable, complete code; document every external request, data transfer, account requirement, and premium boundary in readme.txt; then validate security, licensing, metadata, and release versioning before you submit.
This structure addresses the reasons freemium plugins most often fail review: locked local functionality, misleading upgrade prompts, undisclosed remote calls, incompatible assets, incomplete packages, and unsafe update mechanisms. The practical workflow below is aligned with WordPress.org guidance current in 2026, including the 14-business-day review target and the post-June-2026 release cooldown.
What freemium architecture is acceptable for a WordPress.org plugin?
Use a two-layer design: a directory plugin that remains useful by itself, plus either a substantive service or a separately installed premium add-on. The free package must not be a countdown trial, a disabled shell, or a local feature set that only wakes up after payment.
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The WordPress.org zip should perform its advertised core job without a license key. A site owner must be able to install it, configure it, and obtain meaningful results without buying anything. You may offer more capacity, automation, hosted processing, or support as a paid option, but the free plugin cannot be deliberately reduced to a sandbox whose only purpose is to sell an upgrade.
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Put paid value in a real service
A service-backed model is defensible when the external system performs substantial work, such as hosted analysis, synchronisation, processing, storage, or another function that is not merely a key check. WordPress.org guideline 6 allows “Plugins that act as an interface to some external third party service … even for paid services.” Explain the service, request timing, data sent, account requirements, outages, and terms before installation.
Keep premium code in a separate add-on
You can distribute premium PHP, JavaScript, or modules outside the directory package while leaving the directory plugin complete and useful. The add-on and its updater must not download or execute arbitrary code, replace WordPress’s updater, or turn the free plugin into a nonfunctional shell. Treat compatibility, licensing, update delivery, and support as part of the architecture rather than as afterthoughts.
| Decision area | Substantive SaaS or service | Separate premium add-on |
|---|---|---|
| Where paid work runs | On the external service; the plugin is its WordPress interface. | In separately installed premium code. |
| Main compliance risk | Undisclosed requests, data handling, account terms, or a remote endpoint that only validates a key. | Incompatible licensing, unsafe downloads, updater interference, or an incomplete free plugin. |
| Free-plugin requirement | The local core remains useful without the service. | The directory version remains useful without the add-on. |
| Operational burden | Uptime, API changes, authentication, privacy, support, and failure handling. | Compatibility testing, distribution, licensing, and update infrastructure. |
| User experience | Service setup, network dependency, account flow, and clear outage messages. | Installation of a second package, version matching, and a safe upgrade path. |
Can I lock premium features in the free plugin?
You cannot lock a local feature solely for payment, disable it when a trial ends, or reduce the plugin to restricted API access. Guideline 5 states: “Plugins may not contain functionality that is restricted or locked, only to be made available by payment or upgrade.”
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Patterns that fail review
- A report, editor, export, or integration is fully implemented in the zip but hidden behind a license check.
- A trial timer disables a previously working local feature after a fixed number of days.
- A quota wall makes the free version unusable for its advertised purpose, with payment as the only way to continue.
- The plugin sends a request only to confirm that a key is valid while all meaningful processing happens locally.
- The free package contains placeholder screens or a “coming soon” shell whose practical function is to advertise the paid product.
Boundaries that can work
- The free plugin performs a complete local workflow, while an optional hosted service performs additional processing that genuinely occurs off-site.
- The free plugin offers a useful baseline and the add-on supplies distinct code, provided the baseline is not intentionally crippled.
- Paid plans provide service capacity, hosted storage, automation, or support that the service actually delivers.
Describe the boundary in plain language. A user should be able to tell which operation runs on the site, which runs remotely, what stops working without an account, and whether existing local data remains accessible.
How should a SaaS-backed plugin be structured?
Design the plugin as a transparent client of a real service, not as a local product with a payment gate. The following sequence keeps the directory package useful and makes remote behavior reviewable.
- Define the local core. List the features that work after activation with no account, key, or network connection. Implement that list completely and test it on a clean WordPress installation.
- Define the remote responsibility. Document the specific operation performed by the service, such as queueing, model inference, remote backups, or cross-site synchronisation. If the endpoint merely returns “licensed” or “unlicensed,” move the paid value into a real service function.
- Make network events explicit. Trigger requests only when a user action, scheduled task, or clearly described integration requires them. Show the destination, purpose, and failure state in the settings and support documentation.
- Minimise and protect data. Send only fields required for the operation, use authenticated transport, avoid secrets in logs, and provide deletion or retention information where the service controls stored data. Explain whether content, personal data, telemetry, or diagnostic information leaves the site.
- Handle failures without damaging the site. A timeout or service outage should produce an actionable admin notice, not a fatal error, silent data loss, or a locked editor. Preserve local data and allow the user to retry or continue with local functionality.
- Document account and billing boundaries. State whether an account is optional or required, which actions consume a paid allowance, what happens when that allowance ends, and where service terms and the privacy policy are published.
What belongs in the plugin header and readme.txt?
Reviewers use the main plugin file and readme.txt to verify identity, compatibility, licensing, and user-facing claims. Keep both concise, accurate, and synchronized.
Main plugin PHP file
Put the required plugin headers in the main file, including the plugin name, version, minimum requirements, and license information. Keep the version here identical to the release version and to the versions represented in the repository files. Do not bury the header in generated output or ship a package whose entry file does not identify the plugin clearly.
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- Description: Explain what the free plugin does without implying that a payment is required for its basic advertised purpose.
- Installation and configuration: Give exact activation, setup, connection, and service-account steps.
- Support boundaries: Tell users which questions are handled by the plugin team and which belong to the external service.
- Stable Tag: Set it to the version represented by the tagged directory release; do not leave it stale or point it at an absent tag.
- License fields: State the applicable GPL-compatible license information consistently with the code and bundled assets.
- External-service disclosure: Name the service, explain when requests occur, identify the categories of data sent, and link to the service’s terms and privacy policy in the published documentation.
- Limitations and premium boundaries: Identify what remains free, what requires the service or add-on, and what happens if the account, quota, or service is unavailable.
Use the official readme validator before submission. Correct metadata, spelling, stable-tag, and formatting errors there rather than expecting a reviewer to infer your intent.
How do licensing and bundled assets affect approval?
Every file shipped in the directory package must be compatible with GPL distribution: your code, JavaScript and CSS, fonts, images, data files, and third-party libraries. A plugin can be rejected even when its PHP is original if an included asset has incompatible terms.
Keep shipped code readable
Avoid obfuscation and unexplained encrypted payloads. For built or minified third-party code, include the corresponding source or a maintained source link and build instructions. Reviewers need to understand what is executed and how the distributed artifact is produced.
Use WordPress libraries instead of copies
Prefer the default WordPress libraries when they provide the required capability. Do not bundle duplicate copies of WordPress libraries without a clear technical reason; duplicates increase conflicts, package size, and review risk.
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Audit non-code content
Check image licenses, icon sets, sample data, fonts, and generated files. Record license notices where required and remove unused assets. “It came from a package manager” is not a license determination.
How should upgrade prompts and links behave?
Promote a paid option only through proportional, user-initiated admin notices or settings. The public-facing site must not be hijacked by unsolicited credits, injected links, or banners that appear where the site owner did not choose to display them.
- Place upgrade information in a predictable settings or notices area, with a dismissible control where appropriate.
- Do not redirect activation, the dashboard, or the editor to a sales page.
- Do not add public links, footer credits, or tracking requests without a clear user choice and documented purpose.
- Do not track users without consent; explain any telemetry and provide the required controls.
- Do not use the readme as spam or make claims that the free package cannot deliver.
The upgrade screen should state whether the purchase adds hosted work, a second package, support, or another concrete benefit. Avoid language that implies a local feature is available when the directory plugin intentionally does not include it.
What security checks should happen before submission?
Run a dedicated security pass in addition to functional testing. WordPress.org review looks for common vulnerabilities as well as policy violations.
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- Capabilities: Check the current user’s capability before every privileged action, including settings changes, exports, remote jobs, and destructive operations.
- Nonces: Add and verify nonces for state-changing requests, including AJAX and form submissions.
- Sanitization: Sanitize input at the boundary appropriate to its type and context; validate URLs, identifiers, arrays, and uploaded values.
- Escaping: Escape output at display time for HTML, attributes, JavaScript, CSS, and URLs rather than assuming stored values are safe.
- Database and file operations: Use prepared queries, safe filesystem APIs, restrictive paths, and controlled file types. Never execute user-supplied code.
- Remote requests: Restrict destinations, verify responses, set timeouts, handle malformed data, and avoid exposing credentials in error messages.
- Privacy: Identify personal data collected or transmitted, document retention, and add the appropriate WordPress privacy-policy information.
- Dependency review: Check every bundled library and remove abandoned or unnecessary code.
Run Plugin Check and inspect its findings manually. A clean automated result does not replace review of authorization, data flow, licensing, and failure paths.
What must be in the submission package?
Submit a complete, ready-to-go zip, not a reserved name, placeholder, or partially built repository snapshot.
- Build the production package from a clean checkout and confirm that the main plugin file is at the expected location.
- Include all runtime files, translations or metadata you rely on, license notices, and readable source or maintained source links for built code.
- Remove development secrets, local configuration, test credentials, debug dumps, and unused build artifacts.
- Increment the plugin version for every release.
- Align the main-file version, trunk
readme.txt, and taggedreadme.txt; verify that the stable tag identifies the same release. - Run the official readme validator and Plugin Check, then fix policy, metadata, and code findings.
- Test activation, upgrade, deactivation, uninstall, multisite behavior where supported, and recovery from a failed external request.
- Open the final zip as a reviewer would and confirm that it contains the exact files documented in the readme.
How should you test across hosting environments?
Use more than one WordPress and PHP environment because filesystem permissions, cron behavior, HTTP restrictions, object caching, and database settings vary by host. Test a clean single-site install, an upgrade from the previous release, and a site with realistic existing content.
Minimum functional matrix
- Fresh activation with and without the optional service connection.
- Local core features while the network is unavailable.
- Expired credentials, revoked credentials, rate limits, malformed responses, and long timeouts.
- Service outage during an editor save, scheduled task, import, or export.
- Deactivation and reactivation without deleting user data unexpectedly.
- Upgrade and rollback behavior when the add-on or service version does not match.
- Users with insufficient capabilities attempting every privileged route.
- Sites using different permalink structures, locales, and common security plugins.
Record expected results for each case. A reviewer should see graceful notices and preserved data, not white screens, repeated remote retries, or an admin area that cannot be reached.
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Why are freemium plugins rejected, and how do you fix each problem?
“The free version is trialware”
Symptom: Local features stop after a timer, quota, or payment check. Fix: Restore a complete local workflow, or move the paid capability to a genuinely performing service or a separately installed add-on.
“The remote endpoint only validates a license”
Symptom: The zip contains all processing code, while the server returns only an authorization result. Fix: Move meaningful processing to the service and document its data flow, or ship the processing as a compliant separate add-on.
“External calls are undisclosed”
Symptom: Activation or routine use sends content or telemetry without clear documentation. Fix: State the destination, trigger, payload categories, account requirement, retention, terms, privacy policy, and failure behavior in the readme and relevant settings screen.
“The package is obfuscated or incomplete”
Symptom: Minified or encoded code has no corresponding source, build information, or license evidence. Fix: Provide readable source or a maintained source link, build instructions, and GPL-compatible notices; remove unnecessary generated artifacts.
“The plugin hijacks the admin or public site”
Symptom: Forced redirects, persistent notices, unsolicited public links, or aggressive sales screens interfere with normal WordPress use. Fix: Make promotion proportional, dismissible where appropriate, and confined to user-initiated admin contexts.
“Security and privacy controls are missing”
Symptom: Capability checks, nonces, escaping, sanitization, safe remote requests, or privacy documentation are absent. Fix: Complete the security checklist, run Plugin Check, and manually exercise unauthorized and malformed-input paths.
What should you expect after submitting?
WordPress.org’s submission guidance states that once a plugin enters the review queue, the code is reviewed for issues within 14 business days. That is a stated review target, not a guarantee of approval or total publication time; incomplete responses or policy fixes can extend the process.
Since June 2026, every plugin release goes through a cooldown period before distribution through the WordPress.org update API. Plan releases around that delay instead of promising immediate updates to users. Keep emergency fixes, compatibility testing, and support communications ready for the interval between upload, review, cooldown, and update availability.
Guidelines and release systems can change. Recheck the live Detailed Plugin Guidelines, readme validator guidance, Plugin Check documentation, and automated-security-review information immediately before submission. AI-assisted code receives no relaxed standard: WordPress.org states, “The Detailed Plugin Guidelines are not relaxed for AI-assisted submissions.”
Which model should you choose: serviceware or an add-on?
Choose the model that keeps the directory plugin independently useful while making the paid boundary easiest to explain and operate.
- Choose serviceware when the differentiating work naturally requires hosted compute, storage, synchronisation, or a continuously updated remote system, and you can meet privacy, uptime, authentication, and support obligations.
- Choose an add-on when the premium capability is self-contained WordPress code that users need to run locally and you can maintain secure distribution, version compatibility, licensing, and updates outside the directory.
- Rework the idea when neither model leaves a meaningful free product. A payment-gated local feature is not made compliant by adding a token check or a nominal API call.
Whichever route you take, write the free-versus-paid boundary before coding, test the failure mode before marketing the feature, and make the package, readme, licensing, security, and release versions tell the same story.
Frequently Asked Questions
Can a freemium plugin require users to create an account?
Yes, an account can be necessary for a substantive external service or an add-on distribution system, but the requirement must be disclosed before activation depends on it. Explain what the account enables, what data is exchanged, and which local features remain available without signing in.
What happens to site data if the paid service goes offline?
Design the plugin so local settings and existing content remain usable, and show a clear retry or fallback message instead of blocking the WordPress admin. Document whether queued work is retried, lost, or retained by the service and for how long.
Can I distribute a premium add-on through my own updater?
You may distribute separate code, but the updater must not download or execute arbitrary payloads or interfere with WordPress’s native updater. Publish authenticated, versioned packages and test mismatched, failed, and rolled-back updates.
Does passing Plugin Check guarantee approval?
No. Plugin Check helps identify technical and guideline issues, but reviewers still assess licensing, data disclosures, user experience, completeness, and the actual paid architecture. Treat its output as one validation layer, not an approval decision.
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