diff --git a/public/actions/submit.php b/public/actions/submit.php
index 4d4e82f..1ff438d 100644
--- a/public/actions/submit.php
+++ b/public/actions/submit.php
@@ -238,7 +238,7 @@ $database->action(function ($database) {
     // Add Stripe fees
     // https://support.stripe.com/questions/passing-the-stripe-fee-on-to-customers
     if ($SETTINGS["prices"]["add_stripe_fees"]) {
-        $duecard = ($duecard + 0.30) / (1 - 0.029);
+        $duecard = number_format(($duecard + 0.30) / (1 - 0.029), 2) * 1.0;
     }
 
     echo "\nCost $dueusd total: $duecard to Stripe, $campcoupons as coupons\n";
diff --git a/public/static/signup.js b/public/static/signup.js
index 9bf4739..8d0583a 100644
--- a/public/static/signup.js
+++ b/public/static/signup.js
@@ -124,7 +124,7 @@ function updateTotal() {
         cardcharge = (cardcharge + 0.3) / (1 - 0.029);
     }
 
-    totalcharge = Math.max(cardcharge + couponcharge, 0);
+    totalcharge = Math.max(cardcharge + couponcharge, 0).toFixed(2);
 
     // The server will refuse to finish the registration if this doesn't match
     // the backend-calculated amount, don't bother being a haxxor