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This new "feature" is terrible and is a fundamental change. This feature does not conform to most businesses and should be an option if there are other regulatory purposes in other countries. It severely limits the flexibility of the system and limits its function. I highly recommend a switch to disable this new "feature".

Glad to see more customers speaking up about this… it’s a simple, fixable issue. All they need to do is keep allowing the switch: Add ($allow_adminarea_invoice_mutation = true;) in your WHMCS configuration.php . WHMCS choosing a one-size-fits-all strict model is what’s really causing the pain… let us decide if we need to deal with regional compliance and added accounting complexity, not force it on everyone.

A system should be designed to be functional for its paying customers, rather than being dictated by external regulations that may or may not be applicable to all users. Implementing such a feature without a proper disable option is impractical and appears to be an oversight. The current suggested workarounds are ineffective for the majority of standard web design and hosting businesses. Remember, most projects start off with two 50% (published) invoices (deposit and final) from the quote when converted and the final invoice typically gets tweaked for various reasons. This change would prevent that quick 10 second update to it. WHMCS should focus on developing efficient software that delivers value to its users, allowing us to manage legal compliance independently, rather than introducing features that hinder usability.

Yes, I agree they should be an option

While I understand that bugs are part of any Release Candidate cycle, it's concerning that we are still discussing basic optimization issues like proper OPcache support. And let's not even get started on the fact that we still don't have 100% native Nginx support. This becomes particularly ironic with the introduction of the new WHMCS Cloud Solution. With cloud hosting, the resource costs are on their side, so you'd think they'd be rushing to support Nginx to reduce their own infrastructure expenses. It's like being sold a high-performance engine but being told you have to power it with hamster wheels. Maybe once their bills start rolling in, Nginx support will suddenly become a priority. This all points to the bigger issue: the development velocity. Core development feels like it's just about "keeping the lights on" (PHP/ionCube updates) rather than actual innovation. This stagnation has allowed third-party developers like ModulesGarden to build entire businesses by selling us functionality that should have been in the core a decade ago. When you look at the "Total Cost of Ownership" license fees + necessary third-party modules, the value proposition is slipping. Newer platforms like Upmind are entering the market with an API-first architecture and modern features built-in from day one. If WHMCS continues to outsource innovation to the community while raising prices for maintenance updates, that competitive threat is going to become an exodus very quickly. We need core features that match the modern hosting landscape, not just compatibility patches.

Yeah this is a nightmare

This is what one WHMCS Staff tell me You have the option to make the change to your WHMCS configuration.php file and add the line $allow_adminarea_invoice_mutation = true;, but it is your decision whether to do so. When this line is present in your configuration.php file, the system will permit most of the changes to invoices that existed before WHMCS version 9.0, notably: Line items can be changed for invoices in any status (when in the "Manage" mode and with the correct admin user permissions set). All attributes are available in the Options tab regardless of the invoice status (when in the "Manage" mode and with the correct admin user permissions set). Payments can be applied in the Add Payment tab regardless of the invoice status (with correct admin user permissions set). Please note that using this configuration line ($allow_adminarea_invoice_mutation = true;) in your WHMCS configuration.php The file is highly discouraged, as it may permit changes that are not compliant with regional/country business regulations and complicate accounting. To bring awareness of this, a Warning health check will appear in the System Health Check summary when the value is present in your WHMCS configuration.php file. Additionally, all “full administrators” will see an Admin Warning banner (which can be dismissed up to every fortnight). You may want to add it temporarily if you do need to make the changes listed above, which were changed in WHMCS version 9.0 to improve invoice management and ensure tax compliance by keeping invoice records consistent. If you do not see any warnings or have issues with editing invoices or changing their status when this line is added, please let us know. Starting with WHMCS version 9.0, non-Draft invoices are immutable. This means you cannot edit transactions (now listed under the Ledger section on the invoice), add or remove items, or modify descriptions on an invoice once it’s no longer in the "Draft" status. This change is intended to improve invoice management and ensure tax compliance by keeping invoice records consistent. For more information on invoice management in WHMCS version 9.0, please refer to the following documentation: https://docs.whmcs.com/9-0/billing-and-invoicing/invoice-management/

I never imagined that a simple update could introduce so many problems — and even worse, apparently without proper testing. It is absolutely ridiculous for a financial management system to have its own financial logic broken. In the last 24 hours, I finally received a response on the open support ticket, along with a so-called “patch” (attached). In practice, this patch only fixes the reports by hiding the incorrect ledger entries. However, in several other areas of the system, the incorrect postings are still happening. For example, the “Transactions” tab inside the client profile continues to show wrong values and misleading entries. So, in short, this patch does not actually fix the root problem — it only masks it in specific reports. For now, apply it if you want to slightly reduce the visible impact, but be aware that the financial logic is still broken in multiple parts of the system. At this point, we are seriously considering rolling back to a previous version — or even migrating away from WHMCS entirely. Year after year, the pricing increases exponentially, while the quality of support continues to decline and critical issues like this keep happening. The current level of instability and support simply does not justify the price they are charging anymore. whmcs_v9.0.0-supporthotfix.1_750a0b77ff.321_WHMCS-24949.zip

Hi WHMCS ecosystem developers! I am excited to share an early heads-up about the upcoming WHMCS 9.0 release by the end of 2025 - a major update that brings important changes to the platform’s technical requirements. As part of this release, several core dependencies will be updated, and minimum system requirements will be increased. These changes are designed to improve performance, security, and compatibility with modern PHP standards. Key Updates in WHMCS 9.0: Minimum PHP version: 8.2 Recommended PHP version: 8.3 Minimum ionCube Loader version: 13.0.2 or higher Recommended ionCube Loader version: 14.4.0 or higher Updated dependencies: A number of underlying libraries and components have been upgraded. Some notable changes include: Smarty v3.1.48 —> v4.3.4 Legacy Smarty Tags are being deprecated and will no longer function in 9.0. Smarty Template Objects (including their use in plugins) will no longer be supported. guzzlehttp v7.4 —> v7.4.5 illuminate v7.x —> v9.0 I have attached a provisional list of dependency changes to this post. Please also use this thread to provide your feedback and ask questions of the Development Team regarding these requirement and dependency changes. These changes will require action from module developers to ensure continued compatibility. We recommend reviewing your module code and preparing for updates ahead of the release. We’ll be sharing more details, including a release window, definitive changelog and developer guidance, between now and the end of 2025 to help you get ready. Thank you for being a valued part of the WHMCS ecosystem. We appreciate your continued support and look forward to working together to make WHMCS 9.0 a successful release. whmcsv90_composerlock_provisional.txt

Okay, maybe I was too quick about credit notes. It seems a lot of the features are "coming soon™️". This is not a Release Candidate lol. This is not even alpha. This is internal development. Nothing can convince me that this release didn't just happen because WHMCS promised us a release in December.

@WHMCS John If you want this to be the new default Stripe module, a migration path from the current default Stripe module will be necessary.

Hello @sahostking Thank you for your message. We are aware of this issue in WHMCS 8.13.4, which is currently being tracked under case WHMCS-26568 with our development team. A hotfix has been attached to this message to address this issue for you and anyone else. Please upload and extract the contents of the attached file into your WHMCS installation directory, allowing it to overwrite the existing files. I hope this helps! WHMCS-26568-hotfix.zip

Hi everyone, I would like to share a free community addon I created for WHMCS 9.x: CW Invoice Mutability for WHMCS 9.x Repository: https://github.com/RicRey1988/cw-invoice-mutability-whmcs-9.x WHMCS 9 introduced invoice immutability for non-Draft invoices. I understand the reason behind this change from an accounting and audit-trail perspective, but I also noticed that some administrators still need a controlled way to manage invoice editing in specific internal cases, especially before an invoice is paid or before it is synchronized with an external tax/e-invoicing system. This addon provides an admin interface to manage the current WHMCS invoice mutability compatibility option without manually editing configuration.php. Main features: Enable or disable invoice mutability from the WHMCS Admin Area. Automatically add or remove the current WHMCS compatibility flag: $allow_adminarea_invoice_mutation = true; Create a backup of configuration.php before modifying it. Optionally hide the WHMCS Admin Area warning banner about invoice immutability being disabled. Advanced/emergency mode to convert eligible Unpaid invoices back to Draft. Audit log table with invoice snapshot, invoice items, transactions, admin ID, IP address, reason, and timestamp. Safety checks to block Draft conversion when the invoice has transactions, payment date, or possible external/tax authorization references. PayPal donation link included for anyone who wants to support the project. The advanced Draft mode is intentionally restricted. It is not intended for already-paid, fiscalized, externally authorized, or tax-reported invoices. In those cases, the correct workflow should normally be credit notes, cancellation, voiding, or re-issuance according to local accounting rules. Installation: The folder must be named exactly: cw_invoice_mutability Final WHMCS path: /modules/addons/cw_invoice_mutability/ Required structure: modules/ └── addons/ └── cw_invoice_mutability/ ├── cw_invoice_mutability.php ├── hooks.php ├── README.md └── lib/ └── CwInvoiceMutabilityTools.php You can clone it directly with: cd /path/to/whmcs/modules/addons git clone https://github.com/RicRey1988/cw-invoice-mutability-whmcs-9.x.git cw_invoice_mutability Then activate it from: Configuration > System Settings > Addon Modules After activation, go to: Addons > CW Invoice Mutability This addon is free and community-oriented. It is not affiliated with WHMCS. If it helps you, donations are welcome: https://paypal.me/hostingsupremo Feedback, improvements, and pull requests are welcome.

I’ve added: $allow_adminarea_invoice_mutation = true; Honestly, this change is a nightmare for our daily workflow. We need to edit invoices every day, and with this new restriction, what used to be a simple operation has become an everyday problem. In my opinion, this was a very bad decision from a usability point of view, especially for companies that manage billing operations daily and need flexibility when handling invoices.

Not everyone wants SAAS solutions, or keeping data with a third party due to concerns about client data. I'm one of those businesses.

Request WHMCS to make it a confugurable option instead of removing it?

The one question I have is "why"? Clearly there's a need and demand for it, why is it not even considered being made optional, with warnings about not doing it or what have you. Why is it simply removed, with no options and so on.

Whats stupid is as a developer this is as simple as adding a checkbox to the config to allow us to choose ourselves. I've never in my life understood why software companies lock you in, instead of giving you the option. You keep increasing prices year after year and you want us to stay with you, but if you keep doing this crap most of your base is not gonna find value in your ever increasing prices.

Welcome to the common sense reasons why were frustrated about WHMCS enforcement of preventing us from editing our OWN invoices we created in the first place. Credit / debit is useless in real world standard practice. If they want to provide a switch to disable editing published invoices or changing status fine, but dont force it on the customer base. That's dumb.

Are there still issues after the 9.0.3 release?

add this line to your configuration.php it will go back to normal behavior $allow_adminarea_invoice_mutation = true;

Thank you for the terrible WHMCS support. This is now the tenth client who has made a bulk payment and the late fee is simply not added to the invoice, and none of the outstanding invoices are automatically marked as paid. I’m not even going to mention the credit and debit issues anymore, because it seems the WHMCS developers themselves don’t even know what they’re doing. Does anyone have a suggestion for another system similar to this garbage?

I think you guys may be dramatically underestimating what AI is capable of, but I suppose we shall see. As for the post being suitable or not, Webpros has done everything in their power to alienate their client base - this type of post is the inevitable consequence of that.

"Luck" isn't really a component here. If you haven't played around with agentic coding I can see why this would seem like a stretch for you, but it's quite trivial to get a fairly simple billing system up and running quite rapidly. And like I said this is with current-level tools, in a year or two, replicating the entirety of WHMCS would likely be very doable.

Yeah, except for adding AI to domain search, this release doesn't really provide on any of the other promises. Credit notes doesn't work either. When you cancel an invoice, WHMCS just adds a transaction to the invoice. If the invoice has a total of $100, WHMCS just adds a transaction of $100 and cancels the invoice. There's no credit note or anything.

How WHMCS have set this as a RC instead of a Beta is insane. It's a huge upgrade in terms of it's impact on themes/modules. No beta, no reply from WHMCS, no forums specific to v9.

Your process sounds good apart from WHMCS. I would never recommend trying to import tables to new files. You need to update your existing install as normal. You can update from your version but you may have more luck doing a manual update. Backup everything, upload the new v8.13 files, adjust your hosting/server settings to meet the requirements (e.g you may need to update PHP) then run the installation script.

@BENELUX, Today's the day!! https://blog.whmcs.com/133775/whmcs-90-release-candidate-out-now

This week or next! It sure would be nice to double the size of the engineering team temporarily for one release every few years!

@stormy, I'm glad to hear the e-invoicing feature will be a real value add for you. We are working with expert solution-providers in this space, so we're confident about delivering an easy to use and compliant solution with the broadest coverage. @andp97, Yes, by the end of the year in a pre-release version of WHMCS you will have access to this new feature. This bullet point actually describes two significant features which we're very excited about: 1. A RESTful API which provides access to the product catalogue and shopping cart logic. This will provide a suite of new endpoints to get product catalogue information, add, manipulate and get information about items in the cart (including price breakdowns and totals) and much more, all without touching the cart.php file or PHP session data. This means that power users could create their own highly-bespoke frontends whilst WHMCS handles the maths in the background, before seamlessly passing visitors to the checkout page to complete payment. 2. A brand new thin client powered by the aforementioned new API capabilities, providing a thoroughly modern purchase experience based on Vue.js. I've attached a sneak peak below. The new BuyFlow is a compiled Single-page application, meaning the layout isn't manipulated through templates, but you will be able to customise the colours to match your theme through a custom.css overrides file. The shopping cart as it exists today (cart.php and order form templates) isn't going away and will still be available if you'd like to stay with the familiar experience. Stay tuned to our blog and socials over the coming weeks for more information!

Hi @venkat.j, The current latest version is 8.13. This behaviour suggests the dates were set to 00/00/0000, either by an admin (in which case there should be an entry in the client's Log tab) or by a rogue after-market module (in which case there probably wouldn't). You can edit the date fields to set the actual dates and click Save Changes. The correct dates will be stored.

Hello, Not at all and it's highly recommended, to change the admin path.

Hi @Evolve Web Hosting, Stripe's Payment Methods are not interoperable between Stripe and Stripe Dynamic systems. Clients will need to enter payment details afresh when selecting Stripe Dynamic. A migration path is something we could potentially look into in future and demand and priorities permit.

I’m trying to install ModulesStack from https://modulesstack.com/installation/ I followed the steps, but I’m not sure if I’m doing it correctly. The installer runs, but the modules don’t appear in my admin panel. Has anyone successfully installed it? What am I missing?

@Justin ROCKET LAUNCHER Your WHMCS already looks quite close to your main website. I'd probably just rework things like the sidebar panels and hero section, but honestly, it's not as bad as you might think. That said, there's more than one way to approach this. WHMCS doesn't have to be 100% identical to your main website. Keeping the same branding (colors, tone, general feel) is important, but at the end of the day it's still a separate system with a different structure. Trying to make it feel completely seamless usually hits a limit. In our case, we ended up taking a slightly different approach, keeping most of the experience on the main site and only relying on WHMCS where it makes sense. I'm inviting you to see how we made ours looks like for both guests and logged-in clients.

From SamP I can confirm this is an issue of which we are aware and that case #WHMCS-25580 is open with our developers in order to have this reviewed for future releases. Unfortunately, I cannot provide an estimated time for completion for this. This is another critical issue present in v 9.x and the longer we operate a business without these 'accounting' features being resolved the bigger the mess becomes. I have also asked in the ticket why the WHMCS staff are absent in these forums since the release of v 9.x and the hosted version of WHMCS.

AI wont kill WHMCS right now and any near future. The logic behind a system like WHMCS its too huge to replicate easily, domain renewals is one thing, but making it all work together with invoices, dns, hosting, etc etc etc. You need to spend alooooooot of tokens for doing that. So no, right now AI wont kill WHMCS, but give it 2-3 years surely yes WHMCS will be replaced by other systems.

Try this: @media (max-width: 768px) { .sidebar { display: none; } }

Can you please elaborate on Terminal Status? And the routine to transition invoices in v9.1? There has not been a WHMCS announcement or clear documentation about the immutable invoice changes, yet there are many posts and concerns a detailed document showing what has changed and is expected behaviour would be a good way forward.

Yeah, 6 months minimum

That likely means it's setting it into an iframe, and not copying. To test, have a read here. I'd try the javascript version first (don't forget <script tags>) and see if it still loads. Link didn't paste: https://medium.com/@kesen.somar.99/securing-your-website-how-to-disable-iframes-to-prevent-click-hijacking-attacks-98cd2004720f

Thank you for your reply. I can't attach a screenshot because I don't have permission to edit the topic :) I'll leave it here, you can download and take a look.

Thanks for the detailed update! It’s great to see that ModulesGarden is moving quickly with WHMCS 9.0 compatibility, especially for modules like cPanel Extended and Proxmox VE. I’m curious have you noticed any specific issues or challenges when integrating custom-developed WHMCS modules with the new version, particularly around the updated checkout experience or recurring payments? It would be helpful to know what to watch out for before upgrading.

It would be a nightmare. A lot of add-on modules (that need to be updated too, cause of the different PHP version), and a lot of custom hooks (that also will need to be modified in order to work with a higher PHP version). I guess it will last for at least a few working days, maybe more... so the straight update is not viable. The database migration is also safest (anything going wrong during migration? Not an issue, just roll back and study how to fix it...) So, again, the original question: according to WHMCS doc the database migration is a breeze ( https://docs.whmcs.com/8-13/system/system-tutorials/move-whmcs-to-a-new-server/ ), but will it work with such a high version difference?

your API call isn’t using the filter array you think it is, and you’re reading the wrong field from the response. 1103 = totalresults for all unpaid invoices (because filters weren’t applied). 25 = numreturned default page size, with no limitnum specified. $clientid = (int) $vars['params']['userid']; $command = 'GetInvoices'; $postData = array( 'userid' => $clientid, 'status' => 'Unpaid', 'limitstart' => 0, 'limitnum' => 3000, ); $getClientInvoices = localAPI($command, $postData); // , $adminuser if needed $invoicecount = 0; if ($getClientInvoices['result'] === 'success') { $invoicecount = (int) $getClientInvoices['totalresults']; } if ($invoicecount >= 1) { logActivity( 'Service renewal will be aborted for client ' . $clientid . '. It is not qualified because it has ' . $invoicecount . ' unpaid invoices - by hook_send_renewal_notice_toadmin...' ); }

Hello, It’s clear that there is an issue with your database configuration. First, try connecting to the MySQL database using the credentials provided in your configuration.php file and check whether the connection is successful.

Try to remove the line 'uri' => '#',

Hi @rcartists, This error is typically caused by an syntax error in a template customisation, after-market module or action hook. 1. To look for template errors, follow these steps: https://docs.whmcs.com/troubleshooting/general-troubleshooting/empty-pages/ 2. If the problem persists follow these steps to troubleshoot other customisations: https://docs.whmcs.com/troubleshooting/general-troubleshooting/blank-or-partially-rendered-pages/#oops-or-blank-pages-elsewhere

Are you sure you haven’t modified the JSON files in BillingExtension/core/BillingExtension_Admin/resources/country, or changed the tbltax table in the WHMCS database at any point? I ask because Greece is correctly displayed with the ISO code GR and listed under Europe. The only place where the module uses the value EL is for VIES validation, as required, since Greece is represented as EL in the VIES system. As for the Canary Islands, they are not an EU country but a region of Spain, similar to how Normandy is part of France. If, as I assume, you need to handle tax rules for Las Palmas and Santa Cruz de Tenerife (special tax regimes of Canary Islands), you need to click the orange button next to Spain. From there, you can configure the specific tax settings in the modal window. Tick checkboxes to make them tax exempt. That said, given your question, specifically, how to treat the Canary Islands as an Intra-EU country even though, as mentioned earlier, they are not a country but a region of Spain, it leads me to suspect that you may have manually modified the tbltax table in WHMCS at some point. This is likely the root cause of the issue. The table should look like this with both regions defined as state under the same country, Spain (ES). In any case, when using only the BX interface for managing Tax Rules, no issues should occur.

Today we've enabled Mark as Solution on the community. Located in the footer of each post you'll see "Mark as Solution" as the post, this will be visible to the original poster. Once the post has been marked as solved you'll see a green banner appear in the top of the post with a link to the post selected as as the solution. This is the first of many new features we're rolling out as part of our latest community upgrade.