WooCommerce: Force Cart to Specific Amount (Deposit)

Here’s a very simple snippet that achieves a very complex task – what if you wanted to force your Cart to charge a deposit or a fixed fee, no matter the product price?

Well, thankfully WooCommerce is pretty flexible and a lot of workarounds can be found. In this case, forcing the checkout to a fixed amount (e.g. $100) is as simple as applying a negative “cart fee” to make the total become $100.

Sounds like Japanese? Great – here’s why you’re on Business Bloomer. Copy the snippet, apply it to your test WooCommerce site and see the magic happen – without knowing anything about coding!

WooCommerce: force cart total to $100 no matter what is added to cart

PHP Snippet: Force Cart to Specific Amount (Deposit) – WooCommerce

/**
 * @snippet       WooCommerce Deposit
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @community     https://businessbloomer.com/club/
 */

// Note: this will force Cart to $100

add_action( 'woocommerce_cart_calculate_fees','bbloomer_woocommerce_deposit' );

function bbloomer_woocommerce_deposit() {
    $total_minus_100 = WC()->cart->get_cart_contents_total() - 100;
    WC()->cart->add_fee( 'Balance', $total_minus_100 * -1 );
}

Where to add custom code?

You should place custom PHP in functions.php and custom CSS in style.css of your child theme: where to place WooCommerce customization?

This code still works, unless you report otherwise. To exclude conflicts, temporarily switch to the Storefront theme, disable all plugins except WooCommerce, and test the snippet again: WooCommerce troubleshooting 101

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Rodolfo Melogli

Business Bloomer Founder

Author, WooCommerce expert and WordCamp speaker, Rodolfo has worked as an independent WooCommerce freelancer since 2011. His goal is to help entrepreneurs and developers overcome their WooCommerce nightmares. Rodolfo loves travelling, chasing tennis & soccer balls and, of course, wood fired oven pizza. Follow @rmelogli

13 thoughts on “WooCommerce: Force Cart to Specific Amount (Deposit)

  1. Hello Rodolfo,
    Thank you for your code! I wonder how to add functionality so that the user would not be able to checkout if the balance is negative.

    Best,
    Jin

  2. I made a slight change to the code to suit my purposes. Its not perfect but it works for me for the moment.

      WC()->cart->add_fee( "The balance of £" . $total_minus_150 . " in full is required 4 weeks before Hire Date", $total_minus_150 * -1 );
  3. Hey Rodolfo,
    I have just used the code today 20/10/2021 to Force Cart to specific amount. It works ok. I need to figure out the minus display issue thought lol.

    WordPress 5.81
    PHP 7.3.3
    Apache

  4. can we add the custom deposit price
    in single product

    1. Hi Sarfaraz, thanks so much for your comment! Yes, this is definitely possible, but I’m afraid it’s custom work. If you’d like to get a quote, feel free to contact me here. Thanks a lot for your understanding!

  5. Hi,

    The fee shows a minus figure (naturally). How would you have it show a positive figure to the end user and calculates as a negative. So for example, if you were using £5 deposit but wanted the fee to show the total outstanding minus the £5, how would you do this so it shows up on all places including emails.

    This is what i’m after:

    Total ………………………… £ 30
    Pay on collection ………. £25
    Deposit …………………….. £ 5

    This is what the code gives me:

    Total ………………………… £ 30
    Pay on collection ………. -£25
    Deposit …………………….. £ 5

    1. Hiya Daniel, thanks so much for your comment! Yes, this is possible – but unfortunately this is custom work and I cannot provide a complementary solution here via the blog comments. If you’d like to get a quote, feel free to contact me here. Thanks a lot for your understanding! ~R

  6. Hi Rodolf, I am looking for something similar to this, I will check this code, thank you for sharing.

    1. Nice 🙂

  7. I have a lodge which charges a deposit online (with PayPal) and customers can pay the rest when they arrive in cash to save on fees etc.
    I want to charge a 20% deposit amount of the cart total at checkout, without any extra outstanding costs they have to pay. I’ve looked at the deposit plugin solutions but they have more options than I need.

    Is it possible to modify this code to calculate 20% of cart total and only charge this at checkout?

    I can then send an e-mail with the amount outstanding separately.

    Thanks for your advice!

    Ben

    1. Ben, thanks so much for your comment! Yes, this is possible – but unfortunately this is custom work and I cannot provide a complementary solution here via the blog comments. Thanks a lot for your understanding! ~R

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