There's a lot of open issues
No release in over a year
Support for using TaxJar to handle tax calculations in Solidus



 Project Readme


CircleCI build status

SuperGood::SolidusTaxjar is a Solidus extension that allows Solidus stores to use TaxJar for tax calculations.

This is not a fork of spree_taxjar, like solidus_taxjar. Instead of using a custom calculator, SuperGood::SolidusTaxjar uses the new configurable tax system by @adammathys introduced in Solidus v2.4. This maps better to how the TaxJar API itself works.


  1. Add this line to your application's Gemfile:

    gem 'super_good-solidus_taxjar'

    And then execute:

  2. Next, configure Solidus to use this gem by running the install generator:

    bundle exec rails generate super_good:solidus_taxjar:install
  3. Also, configure your error handling:

    # Put this in config/initializers/taxjar.rb
    SuperGood::SolidusTaxjar.exception_handler = ->(e) {
      # Report exceptions in here. For example, if you were using the Sentry's
      # raven-ruby gem to report errors, you might do this:

    For more information about configuring the extension, see Configuration.

  4. Finally, make sure that the TAXJAR_API_KEY environment variable is set to your TaxJar API key.

Project Status

This extension is under active development and not yet at a v1.0 release, but it's currently being used in production by multiple Solidus stores.

Requirements for TaxJar integrations vary as some stores also need reporting, which isn't provided out of the box by this extension. This is because individual stores will be using different background job frameworks or runners (Sidekiq, delayed_job, ActiveJob, etc.) and a reliable integration will rely on one of these. Because this part of the integration is small, we've chosen to provide the transaction reporting functionality, but have skipped directly integrating it.

If you're having trouble integrating this extension with your store and would like some assistance, please reach out to Jared via e-mail at or on the official Solidus Slack as @Jared Norman.


The extension provides currently two high level calculator classes that wrap the low-level Ruby taxjar gem API calls:

  • tax calculator
  • tax rate calculator

The extension requires the order_recalculated event which is not supported on Solidus < 2.11, so this extension provides a compatibility layer.


SuperGood::SolidusTaxjar::TaxCalculator allows calculating the full tax breakdown for a given Spree::Order. The breakdown includes separate line items taxes and shipment taxes.

This tax calculator will create a Spree::TaxRate that is required for tax adjustments. All other Spree::TaxRates will be ignored in calculations. See this wiki page for more details.


SuperGood::SolidusTaxjar::TaxRateCalculator allows calculating the tax rate for a given Spree::Address. It relies on the same low-level Ruby TaxJar API endpoint of the tax calculator in order to provide the most coherent and reliable results. TaxJar support recommends using this endpoint for live calculations.


See lib/super_good/solidus_taxjar.rb for a list of configuration options and their default values. You can override the default values in one of your Rails application's initializers:

# config/initializers/taxjar.rb

SuperGood::SolidusTaxjar.tap do |config|
  config.cache_duration = 2.hours
  config.line_item_tax_label_maker = ->(taxjar_line_item, spree_line_item) {
    "My Tax Label"
  config.test_mode = true


By default, all requests to TaxJar are logged to the Rails logger. URIs, HTTP method, and response codes will be logged at the info level, any further details (such as response body) are logged at the debug level.

If you are interested in logs for full request responses, be sure to set your logger to the debug level:

Rails.logger.level = 0 # debug

Or, if you want an alternate logger implementation, you can provide your own:

SuperGood::SolidusTaxjar.tap do |config|
  logger =
  logger.log_level = :warn
  config.logger = logger

More details on the Rails Logger are available here.

Logging can also be disabled all together:

SuperGood::SolidusTaxjar.tap do |config|
  config.logging_enabled = false


Run bin/setup to install dependencies. Then, run bundle exec rake to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install.

Changing the Rails/Solidus Versions

The Rails and the Solidus version can be changed by setting the RAILS_VERSION and SOLIDUS_BRANCH environment variables, respectively. See the Gemfile for examples.

Changing the Database Vendor

The database vendor can also be changed from the default (sqlite3) by setting the DB environment variable.

Releasing a New Version

  1. Update the master header in changelog to the version that you're releasing.
  2. Commit your changes and open a PR for the release
  3. Once the PR has been merged into master, run gem bump -v [<major>|<minor>|<patch>] -p -t -r to create a tag and release the gem to ✨ RubyGems ✨
  4. Push your local master branch with --tags to the repository to add the tag to github.
  5. Create a new release on github with the tag
    • Ensure the changelog since the previous release is included
    • Ensure you have noted version migration instructions if applicable
    • Ensure breaking/significant changes are clearly highlighted
    • Ensure changes that are not production ready are clearly highlighted


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the SuperGood::SolidusTaxjar project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.