Is TaxJar compatible with HPOS and Checkout Blocks?
Plugin by Sean Voss · checked by Raz Technologies from v4.2.11 on · How we check
TaxJar 4.2.11 declares compatibility with HPOS (High-Performance Order Storage) in its code. TaxJar 4.2.11 does not declare Cart and Checkout Blocks compatibility. Its "WC tested up to" header says WooCommerce 11.1.2; the current WooCommerce release is 11.2.2.
| Check | Status | Evidence |
|---|---|---|
| HPOS (High-Performance Order Storage) | Yes— Declares HPOS compatible (taxjar-simplified-taxes-for-woocommerce/taxjar-woocommerce.php). Evidence: declared. Verified 15 Oct 2026 (v4.2.11). | Compatibility declaration in taxjar-simplified-taxes-for-woocommerce/taxjar-woocommerce.php Declared |
| Cart & Checkout Blocks | Not declared— No Cart/Checkout Blocks declaration in v4.2.11. Evidence: declared. Verified 15 Oct 2026 (v4.2.11). | No declaration found in the plugin code Declared |
| WooCommerce 11.2.2 | Partial— WC tested up to 11.1.2; current WooCommerce 11.2.2. Evidence: declared. Verified 15 Oct 2026 (v4.2.11). | "WC tested up to: 11.1.2" in the plugin header Declared |
Read from the plugin's zip on WordPress.org (v4.2.11), 15 Oct 2026. Declared = what the plugin's own code states; not a lab test. Re-checked within hours of every new version.
What this means for your store
- You can enable HPOS with TaxJar active: the plugin's own code declares it supports the HPOS order tables. As with any change to order storage, try it on a staging copy first.
- If your store uses the block-based Cart and Checkout (the default for new WooCommerce stores), check that TaxJar's features appear there on a staging copy. The classic checkout (the [woocommerce_checkout] shortcode) is the fallback.
TaxJar at a glance
| Version | 4.2.11 |
|---|---|
| Last updated | 5 Oct 2026 |
| Active installs | 5,000+ |
| Rating | 2.6/5 (28 ratings) |
| WC tested up to | 11.1.2 |
| WC requires at least | 7.0.0 |
| Requires WordPress | 5.4 |
| Tested up to WordPress | 7.1.4 |
| Requires PHP | 7.0 |
Source: WordPress.org, .
Versions we have checked
| Version | HPOS | Checkout Blocks | WC tested up to | Checked |
|---|---|---|---|---|
| 4.2.11 | declared compatible | not declared | 11.1.2 | 15 Oct 2026 |
A new row is added each time a new version is released and scanned.
Similar WooCommerce plugins: HPOS and Checkout Blocks
| Plugin | Installs | HPOS | Checkout Blocks |
|---|---|---|---|
| WooCommerce Tax | 500,000+ | Yes | Not declared |
FAQ
Is TaxJar compatible with HPOS?
TaxJar 4.2.11 declares compatibility with HPOS (High-Performance Order Storage) in its code. Checked 15 October 2026 from the plugin's code on WordPress.org.
Does TaxJar work with the WooCommerce Checkout Blocks?
TaxJar 4.2.11 does not declare Cart and Checkout Blocks compatibility. Checked 15 October 2026.
Is TaxJar compatible with WooCommerce 11.2?
Its "WC tested up to" header says WooCommerce 11.1.2; the current WooCommerce release is 11.2.2. Checked 15 October 2026.