Acumulus
The Acumulus plugin connects your Woocommerce store to the Dutch SIEL Acumulus online financial administration application.
Use with caution
Acumulus works, but test it on a staging site before relying on it in 2026. It runs on 200+ sites, is rated 4.7/5 and was last updated 12 months ago, and scores 57/100 on our health check.
- Loved by users — 4.7/5 from 26 reviews
- Small user base (200+ active installs)
- Only tested up to WordPress 6.8 (latest is 7.1)
- Needs PHP 8.1 or newer
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Acumulus stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| Acumulus | #1 |
| administratie | #2 |
| boekhouding | #3 |
| boekhoudpakket | #1 |
| boekhoudsoftware | #2 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 4.7 from 26 reviews
About Acumulus
From the official readme · v8.7.0Description
Over deze plugin.
WooCommerce boekhouden plugin voor Acumulus
The Acumulus plugin connects your Woocommerce store to the Dutch SIEL Acumulus online financial administration application. It can add your invoices automatically or via a batch send form to your administration, saving you a lot of manual, error-prone work.
The Acumulus plugin:
- Reacts to order status changes via actions.
- Does have 4 admin screens: a register, settings, advanced settings, and a batch send screen.
- Offers a meta box with an overview of the status of the invoice in Acumulus on the edit order screen.
- Does not in any way interfere with the front-end UI.
The Acumulus plugin assumes that:
- You have installed WooCommerce.
- You have an account with SIEL Acumulus, also see Overview of webshop connections.
If not, this plugin is useless and will not do anything.
Installation using composer and GitHub
Note: this is only recommended for developers, not if you only want to use this plugin in your webshop.
- Open a cmd prompt and go to the plugins folder: cd wp-content/plugins
- Download the zip from https://github.com/SIELOnline/Acumulus-for-WooCommerce, either:
- The latest version: https://github.com/SIELOnline/Acumulus-for-WooCommerce/archive/refs/heads/master.zip
- A specific version, e.g.: https://github.com/SIELOnline/Acumulus-for-WooCommerce/archive/refs/tags/7.6.5.zip
- Extract the zip and rename the folder Acumulus-for-WooCommerce-[master|7.6.5] to acumulus
- cd acumulus
- composer update –no-dev
Note this won’t install the test classes from WooCommerce and WordPress that are required by our own tests.
Installing the test environment for this plugin is yet to be described here.
Support
See the Acumulus forum.
Installation
- Install the plugin through the WordPress plugins screen directly or, alternatively, upload the plugin files to the
/wp-content/plugins/acumulusdirectory manually. - Activate the plugin through the ‘Plugins’ screen in WordPress.
- Go to the ‘Settings – Acumulus’ page (
wp-admin/options-general.php?page=acumulus_config) to configure the plugin. - If you do not yet have an account with Acumulus, you can apply for one by clicking on the register now button.
- Complete the (basic) configuration of the plugin.
- Go to the ‘Settings – Acumulus advanced settings’ page (
wp-admin/options-general.php?page=acumulus_advanced) to configure the plugin. - If you have set so, invoices for new orders are now automatically sent to your administration at Acumulus.
- You can use the ‘Woocommerce – Acumulus’ page (
wp-admin/admin.php?page=acumulus_batch) to send a batch of (older) orders to Acumulus. - To cater for specific use cases, the plugin does define some filters and actions, so you can intercept and influence the actions it performs. See the separate filters.txt for more information.
Changelog
With each new version you should visit the settings (and advanced settings) page to see if there are new settings that apply to your situation.
The Acumulus plugin exists for multiple eCommerce solutions and are all built on a common library. Most changes take place in that common library. Therefore, there’s only 1 changelog that is part of the library, see changelog.txt.
Screenshots
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
FAQ
Acumulus: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 16, 2026
Is Acumulus free?
Yes. Acumulus is free to download and use from the official WordPress.org plugin directory.
Is Acumulus safe to use in 2026?
Acumulus works, but test it on a staging site before relying on it in 2026. It runs on 200+ sites, is rated 4.7/5 and was last updated 12 months ago, and scores 57/100 on our health check.
How many websites use Acumulus?
Acumulus is active on 200+ WordPress websites and has been downloaded 33,781 times since it launched in January 2016. It was downloaded 136 times in the last 30 days.
Does Acumulus work with WordPress 7.1?
Acumulus is officially tested up to WordPress 6.8.11, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
What PHP version does Acumulus need?
Acumulus requires PHP 8.1 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Acumulus last updated?
The latest version, 8.7.0, was released on November 4, 2025 (12 months ago).
Who makes Acumulus?
Acumulus is developed and maintained by SIEL Acumulus.
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