From 4ae3b8b3d898e4c7aee02b93829b8f23a63f064a Mon Sep 17 00:00:00 2001
From: John Mizerek <mizerek@gmail.com>
Date: Sun, 15 Feb 2026 17:11:00 -0800
Subject: [PATCH] Fix receipt rounding to match Stripe charge exactly

Calculate total first without intermediate rounding, then work backwards for display values.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 receipt/index.cfm | 51 +++++++++++++++++++++++++++--------------------
 1 file changed, 29 insertions(+), 22 deletions(-)

diff --git a/receipt/index.cfm b/receipt/index.cfm
index 017cf0f..c830792 100644
--- a/receipt/index.cfm
+++ b/receipt/index.cfm
@@ -293,13 +293,34 @@
 			<span>#dollarFormat(cart_grand_total)#</span>
 		</div>
 
-		<!--- Tax --->
-		<cfif get_order_info.TaxRate GT 0>
-			<cfset tax_amount = round(cart_grand_total * get_order_info.TaxRate * 100) / 100>
-		<cfelse>
-			<cfset tax_amount = 0>
+		<!--- Calculate all fees WITHOUT rounding intermediate values (matches createPaymentIntent.cfm) --->
+		<cfset tax_amount_raw = cart_grand_total * get_order_info.TaxRate>
+		<cfset payfrit_fee_raw = PaymentPayfritsCut>
+
+		<!--- Delivery Fee --->
+		<cfset PaymentDeliveryFee = 0>
+		<cfif get_order_info.OrderTypeID EQ 3>
+			<cfmodule template="../modules/get_delivery_fee.cfm" OrderID="#get_order_info.ID#">
+			<cfset PaymentDeliveryFee = calculated_delivery_fee>
 		</cfif>
 
+		<!--- Calculate total BEFORE card fee (no rounding) --->
+		<cfset totalBeforeCardFee = cart_grand_total + tax_amount_raw + payfrit_fee_raw + PaymentDeliveryFee>
+
+		<!--- Calculate final total with Stripe fees: (amount + $0.30) / (1 - 2.9%) --->
+		<cfset cardFeePercent = 0.029>
+		<cfset cardFeeFixed = 0.30>
+		<cfset totalCustomerPays_raw = (totalBeforeCardFee + cardFeeFixed) / (1 - cardFeePercent)>
+
+		<!--- Round ONLY the final total to cents (this is what Stripe charges) --->
+		<cfset order_grand_total = round(totalCustomerPays_raw * 100) / 100>
+
+		<!--- Work backwards to get displayed values that add up correctly --->
+		<cfset tax_amount = round(tax_amount_raw * 100) / 100>
+		<cfset cardFee = order_grand_total - cart_grand_total - tax_amount - round(payfrit_fee_raw * 100) / 100 - PaymentDeliveryFee>
+		<cfset cardFee = round(cardFee * 100) / 100>
+
+		<!--- Display fees --->
 		<cfif tax_amount GT 0>
 			<div class="total-row">
 				<span>Tax</span>
@@ -307,39 +328,25 @@
 			</div>
 		</cfif>
 
-		<!--- Payfrit Service Fee --->
-		<cfif PaymentPayfritsCut GT 0>
+		<cfif payfrit_fee_raw GT 0>
 			<div class="total-row">
 				<span>Service fee</span>
-				<span>#dollarFormat(PaymentPayfritsCut)#</span>
+				<span>#dollarFormat(round(payfrit_fee_raw * 100) / 100)#</span>
 			</div>
 		</cfif>
 
-		<!--- Delivery Fee --->
-		<cfset PaymentDeliveryFee = 0>
-		<cfif get_order_info.OrderTypeID EQ 3>
-			<cfmodule template="../modules/get_delivery_fee.cfm" OrderID="#get_order_info.ID#">
-			<cfset PaymentDeliveryFee = calculated_delivery_fee>
+		<cfif PaymentDeliveryFee GT 0>
 			<div class="total-row">
 				<span>Delivery fee</span>
 				<span>#dollarFormat(PaymentDeliveryFee)#</span>
 			</div>
 		</cfif>
 
-		<!--- Calculate Processing Fee (Stripe 2.9% + $0.30) --->
-		<cfset totalBeforeCardFee = cart_grand_total + tax_amount + PaymentPayfritsCut + PaymentDeliveryFee>
-		<cfset cardFeePercent = 0.029>
-		<cfset cardFeeFixed = 0.30>
-		<cfset totalCustomerPays = (totalBeforeCardFee + cardFeeFixed) / (1 - cardFeePercent)>
-		<cfset cardFee = round((totalCustomerPays - totalBeforeCardFee) * 100) / 100>
-
 		<div class="total-row">
 			<span>Processing fee</span>
 			<span>#dollarFormat(cardFee)#</span>
 		</div>
 
-		<cfset order_grand_total = round(totalCustomerPays * 100) / 100>
-
 		<div class="total-row grand-total">
 			<span>Total</span>
 			<span>#dollarFormat(order_grand_total)#</span>