Estimate Cart Addresses

It’s common to provide a shipping or tax cost estimate before a customer has entered full address details.

To help with this, the cart can use estimated shipping and billing addresses for calculations before complete addresses are available.

An estimated address is an Address model with its isEstimated property set to true. This simple differentiation prevents any confusion between estimated and final calculations.

# Adding a shipping estimate address to the cart

Adding or updating the estimated addresses on the order is done using the commerce/cart/update-cart form action.

You can check for existing estimate addresses with the estimatedShippingAddressId and estimatedBillingAddressId attributes on the cart object.

This example renders a form for adding an estimated shipping country, state, and zip code to the cart:

{% set cart = craft.commerce.carts.cart %}

<form method="post">
    <input type="hidden" name="action" value="commerce/cart/update-cart">
    <input type="hidden" name="estimatedBillingAddressSameAsShipping" value="1">

    {% if not cart.estimatedShippingAddressId %}
        {# show a country selection dropdown #}
        <select name="estimatedShippingAddress[countryId]">
            {% for key, option in craft.commerce.countries.allCountriesAsList %}
                <option value="{{ key }}">{{ option }}</option>
            {% endfor %}

        {# show a state selection dropdown #}
        <select name="estimatedShippingAddress[stateValue]">
            {% for states in craft.commerce.states.allStatesAsList %}
                {% for key, option in states %}
                    <option value="{{ key }}">{{ option }}</option>
                {% endfor %}
            {% endfor %}

        {# show a zip code input #}
        <input type="text" name="estimatedShippingAddress[zipCode]" value="">
    {% endif %}

    {% if cart.availableShippingMethodOptions|length and cart.estimatedShippingAddressId %}
        {# display name+price selection for each available shipping method #}
        {% for handle, method in cart.availableShippingMethodOptions %}
            {% set price = method.priceForOrder(cart)|commerceCurrency(cart.currency) %}
                <input type="radio"
                    value="{{ handle }}"
                    {% if handle == cart.shippingMethodHandle %}checked{% endif %}
                {{ }} - {{ price }}
        {% endfor %}
    {% endif %}

    <input type="submit" value="Submit">

Tax adjusters and shipping adjusters based on estimated address data contain an isEstimated attribute.

A full example of this can be seen in the example templates on the cart page.