We're excited to announce the availability of the WHMCS 9.0 Release Candidate.

This release marks the completion of feature development for WHMCS 9.0 and the final step before it becomes generally available.

WHMCS 9.0 is a compliance-focused release, introducing a range of updates and enhancements designed to help businesses stay aligned with evolving regulatory requirements while continuing to deliver a seamless experience.

WHMCS 9.0 includes the following new functionality and enhancements:

Credit Notes. Built In.
WHMCS is introducing full support for credit and debit notes to simplify global invoicing and improve refund workflows across regulated markets.

Stay Compliant, Stay Clear.
Create credit notes that meet local VAT, GST, and financial reporting standards, formatted and issued directly within WHMCS.

Smarter, Safer Refunds.
Easily manage corrections and adjustments without altering original invoices, preserving data integrity and maintaining legal compliance.

First class. Compliance.
This feature update makes credit notes a core part of the financial workflow, tracked and managed directly inside WHMCS, helping you streamline operations and serve clients with greater clarity and confidence.

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Buy Flow API. Unlocked.
New extensible API for the cart and checkout experience, built for customization, performance, and scale.

Flexible and Developer-Ready
Built on OpenAPI and JSON:API standards, the new API supports product listing, cart actions, and order creation with RESTful methods and UUID support.

Faster Frontends, Fewer Limits
Designed for modern deployment, including static frontends and CDN delivery, giving your developers more control without compromising core stability.

New. Modern. Development
This update gives mid-to-large WHMCS users the tools to build and optimize purchase flows, fully aligned with modern development practices.

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Checkout. Reimagined.
WHMCS is redesigning the client area and purchase experience to deliver a faster, more modern buying journey.

Streamlined and Intuitive.
From a refreshed buy flow to updated color customization and domain checker improvements, everything is built for ease, clarity and conversion-focused design.

Improve Conversions.
A smoother, cleaner interface helps you guide customers from browsing to buying with fewer steps and less friction.

Now Available
This new experience is part of our ongoing commitment to helping you stay competitive and grow your business with confidence.

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Domain Search. Smarter.
WHMCS now includes AI-powered domain name suggestions to improve search and increase domain purchases.

Simplify Discovery.
Users can enter natural, descriptive text to receive relevant domain suggestions; no more keyword guesswork is required.

Boost Conversions.
Smarter search means fewer abandoned carts, more completed checkouts, and higher domain registration revenue.

Now Available.
AI Domain Namespinning is now available in WHMCS 9.0. Designed to enhance the buying experience and help you grow your business through better domain sales.

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SSL Renewals. Automated.
Regulatory changes are reducing SSL certificate validity to 200 days, and later to 47 days. Your WHMCS MarketConnect instance is ready for it.

Stay Compliant and Secure.
Shorter validity periods are supported automatically, so you can continue offering trusted SSL protection without any manual renewals.

Hands-Free Management.
Sell, reissue, and maintain SSL certificates with zero extra effort, built to keep your business running smoothly and securely.

Always On.
This enhancement is fully automated in MarketConnect, keeping you compliant while delivering a seamless experience to your clients.

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Data Import. Simplified.
The new CSV Support for ImportAssist tool makes it easier to bring customer account data into WHMCS with no complex migrations required.

Fast, Flexible Onboarding
Import customer accounts using standard CSV files, giving you a simple way to move data from third-party old platforms into WHMCS.

Reduce Friction, Drive Adoption
Centralize operations faster and remove data fragmentation, whether you're just getting started or expanding your setup to meet demand.

Foundation for More
Customer imports are only the start. This tool sets the stage for future support of domains, invoices, and more - stay tuned.

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VAT Compliance. Streamlined.
WHMCS now delivers more accurate and transparent VAT handling at checkout, built to support compliance and customer trust.

Location-Based Accuracy
VAT is automatically calculated and displayed based on a user's location, with validation for country-specific formats.

Hands-Free Updates
Tax rates update automatically, reducing manual work and minimizing compliance risk.

Clear and Compliant
This enhancement improves transparency at checkout, ensuring a smoother buying experience for you and your customers.

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Legacy Versions. Retired.
In WHMCS 9.0 we removed support for outdated PHP and IonCube Loader versions to improve security, performance, and development efficiency.

Security First.
Support for PHP 7.2, 7.3, 7.4, 8.1 and IonCube 10.2-10.4 is ending, reducing risk from unsupported, end-of-life environments.

Simplified and Streamlined.
Removing legacy dependencies helps accelerate development and eliminates unnecessary build systems and packages.

Cleaner Core, Stronger Future.
This update clears the path for faster releases and a more secure, modern WHMCS, built to support future plans.

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MarketConnect. Unlocked.
WHMCS now supports backward-compatible dynamic services, giving you faster access to new MarketConnect products; no upgrade required.

Sell More, Less Friction.
New MarketConnect offerings can now be delivered on older WHMCS versions, helping you cross-sell and upsell without waiting for version updates.

Faster. Smarter. Smoother.
Improved API integration, better caching, and refined admin experience make it easier to manage and deliver dynamic services and grow your business.

Available Now.
This feature is available in WHMCS 9.0 and designed to help you scale product adoption faster, all while keeping performance and flexibility in sync.

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E-invoicing. Simplified.
WHMCS is introducing support for Peppol BIS V3.0 XML/UBL. Helping you meet growing global compliance standards with ease.

Stay Compliant and Efficient.
Generate Peppol-compliant invoices for key markets like the UK, Australia, Singapore, and more, now built directly into WHMCS.

Save Time, Reduce Risk.
Automated e-invoices will be attached to outgoing emails, streamlining your workflow, and eliminating manual steps.

Be Ready.
This feature is now available on WHMCS 9.0. We're actively monitoring adoption to ensure it delivers real value, so you can focus on growth, not paperwork.

Coming soon

By participating in the Release Candidate stage, you can get early access to WHMCS 9.0 and play a direct role in final testing and feedback before the version becomes generally available.

WHMCS 9.0 Release Candidate is intended for evaluation and testing environments only and is not recommended for use in production. To get started, you can download WHMCS 9.0 RC or update to it using the automatic updater.