diff --git a/app/DataMapper/Tax/AU/Rule.php b/app/DataMapper/Tax/AU/Rule.php
new file mode 100644
index 000000000000..b3d3178453b1
--- /dev/null
+++ b/app/DataMapper/Tax/AU/Rule.php
@@ -0,0 +1,259 @@
+<?php
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
+
+namespace App\DataMapper\Tax\AU;
+
+use App\DataMapper\Tax\BaseRule;
+use App\DataMapper\Tax\RuleInterface;
+use App\Models\Product;
+
+class Rule extends BaseRule implements RuleInterface
+{
+    /** @var string $seller_region */
+    public string $seller_region = 'AU';
+    
+    /** @var bool $consumer_tax_exempt */
+    public bool $consumer_tax_exempt = false;
+    
+    /** @var bool $business_tax_exempt */
+    public bool $business_tax_exempt = false;
+    
+    /** @var bool $eu_business_tax_exempt */
+    public bool $eu_business_tax_exempt = true;
+    
+    /** @var bool $foreign_business_tax_exempt */
+    public bool $foreign_business_tax_exempt = false;
+    
+    /** @var bool $foreign_consumer_tax_exempt */
+    public bool $foreign_consumer_tax_exempt = false;
+    
+    /** @var float $tax_rate */
+    public float $tax_rate = 0;
+    
+    /** @var float $reduced_tax_rate */
+    public float $reduced_tax_rate = 0;
+    
+    /**
+     * Initializes the rules and builds any required data.
+     *
+     * @return self
+     */
+    public function init(): self
+    {
+        $this->calculateRates();
+        
+        return $this;
+    }
+    
+    /**
+     * Sets the correct tax rate based on the product type.
+     *
+     * @param  mixed $item
+     * @return self
+     */
+    public function taxByType($item): self
+    {
+
+        if ($this->client->is_tax_exempt) {
+            return $this->taxExempt($item);
+        }
+
+        match(intval($item->tax_id)) {
+            Product::PRODUCT_TYPE_EXEMPT => $this->taxExempt($item),
+            Product::PRODUCT_TYPE_DIGITAL => $this->taxDigital($item),
+            Product::PRODUCT_TYPE_SERVICE => $this->taxService($item),
+            Product::PRODUCT_TYPE_SHIPPING => $this->taxShipping($item),
+            Product::PRODUCT_TYPE_PHYSICAL => $this->taxPhysical($item),
+            Product::PRODUCT_TYPE_REDUCED_TAX => $this->taxReduced($item),
+            Product::PRODUCT_TYPE_OVERRIDE_TAX => $this->override($item),
+            Product::PRODUCT_TYPE_ZERO_RATED => $this->zeroRated($item),
+            Product::PRODUCT_TYPE_REVERSE_TAX => $this->reverseTax($item),
+            default => $this->default($item),
+        };
+        
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a reduced tax product
+     *
+     * @return self
+     */
+    public function reverseTax($item): self
+    {
+        $this->tax_rate1 = 10;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+
+    /**
+     * Calculates the tax rate for a reduced tax product
+     *
+     * @return self
+     */
+    public function taxReduced($item): self
+    {
+        $this->tax_rate1 = $this->reduced_tax_rate;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a zero rated tax product
+     *
+     * @return self
+     */
+    public function zeroRated($item): self
+    {
+        $this->tax_rate1 = 0;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+
+    /**
+     * Calculates the tax rate for a tax exempt product
+     *
+     * @return self
+     */
+    public function taxExempt($item): self
+    {
+        $this->tax_name1 = '';
+        $this->tax_rate1 = 0;
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a digital product
+     *
+     * @return self
+     */
+    public function taxDigital($item): self
+    {
+
+        $this->tax_rate1 = $this->tax_rate;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a service product
+     *
+     * @return self
+     */
+    public function taxService($item): self
+    {
+
+        $this->tax_rate1 = $this->tax_rate;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a shipping product
+     *
+     * @return self
+     */
+    public function taxShipping($item): self
+    {
+
+        $this->tax_rate1 = $this->tax_rate;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a physical product
+     *
+     * @return self
+     */
+    public function taxPhysical($item): self
+    {
+
+        $this->tax_rate1 = $this->tax_rate;
+        $this->tax_name1 = 'GST';
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for a default product
+     *
+     * @return self
+     */
+    public function default($item): self
+    {
+        
+        $this->tax_name1 = '';
+        $this->tax_rate1 = 0;
+
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rate for an override product
+     *
+     * @return self
+     */
+    public function override($item): self
+    {
+        return $this;
+    }
+    
+    /**
+     * Calculates the tax rates based on the client's location.
+     *
+     * @return self
+     */
+    public function calculateRates(): self
+    {
+        if ($this->client->is_tax_exempt) {
+            nlog("tax exempt");
+            $this->tax_rate = 0;
+            $this->reduced_tax_rate = 0;
+        // } elseif($this->client_subregion != $this->client->company->tax_data->seller_subregion && in_array($this->client_subregion, $this->eu_country_codes) && $this->client->has_valid_vat_number && $this->eu_business_tax_exempt) {
+        //     nlog("euro zone and tax exempt");
+        //     $this->tax_rate = 0;
+        //     $this->reduced_tax_rate = 0;
+        // } elseif(!in_array($this->client_subregion, $this->eu_country_codes) && ($this->foreign_consumer_tax_exempt || $this->foreign_business_tax_exempt)) { //foreign + tax exempt
+        //     nlog("foreign and tax exempt");
+        //     $this->tax_rate = 0;
+        //     $this->reduced_tax_rate = 0;
+        // } elseif(!in_array($this->client_subregion, $this->eu_country_codes)) {
+        //     $this->defaultForeign();
+        // } elseif(in_array($this->client_subregion, $this->eu_country_codes) && !$this->client->has_valid_vat_number) { //eu country / no valid vat
+        //     if(($this->client->company->tax_data->seller_subregion != $this->client_subregion) && $this->client->company->tax_data->regions->EU->has_sales_above_threshold) {
+        //         nlog("eu zone with sales above threshold");
+        //         $this->tax_rate = $this->client->company->tax_data->regions->EU->subregions->{$this->client->country->iso_3166_2}->tax_rate;
+        //         $this->reduced_tax_rate = $this->client->company->tax_data->regions->EU->subregions->{$this->client->country->iso_3166_2}->reduced_tax_rate;
+        //     } else {
+        //         nlog("EU with intra-community supply ie DE to DE");
+        //         $this->tax_rate = $this->client->company->tax_data->regions->EU->subregions->{$this->client->company->country()->iso_3166_2}->tax_rate;
+        //         $this->reduced_tax_rate = $this->client->company->tax_data->regions->EU->subregions->{$this->client->company->country()->iso_3166_2}->reduced_tax_rate;
+        //     }
+        } else {
+            nlog("default tax");
+            $this->tax_rate = $this->client->company->tax_data->regions->AU->subregions->{$this->client->company->country()->iso_3166_2}->tax_rate;
+            $this->reduced_tax_rate = $this->client->company->tax_data->regions->AU->subregions->{$this->client->company->country()->iso_3166_2}->reduced_tax_rate;
+        }
+
+        return $this;
+
+    }
+
+}