diff --git a/addons/purchase/report/purchase_order_templates.xml b/addons/purchase/report/purchase_order_templates.xml
index a7a5c23ab21..18cc431fb3c 100644
--- a/addons/purchase/report/purchase_order_templates.xml
+++ b/addons/purchase/report/purchase_order_templates.xml
@@ -45,7 +45,7 @@
                 </div>
             </div>
 
-            <table class="table table-sm o_main_table mt-4">
+            <table class="table table-sm o_main_table table-borderless mt-4">
                 <thead style="display: table-row-group">
                     <tr>
                         <th name="th_description"><strong>Description</strong></th>
@@ -124,7 +124,7 @@
 
             <div id="total" class="row justify-content-end">
                 <div class="col-4">
-                    <table class="table table-sm">
+                    <table class="table table-sm table-borderless">
                         <t t-set="tax_totals" t-value="o.tax_totals"/>
                         <t t-call="purchase.document_tax_totals"/>
                     </table>
diff --git a/addons/sale/report/ir_actions_report_templates.xml b/addons/sale/report/ir_actions_report_templates.xml
index 87ae01aa9a4..706c985b06f 100644
--- a/addons/sale/report/ir_actions_report_templates.xml
+++ b/addons/sale/report/ir_actions_report_templates.xml
@@ -66,7 +66,7 @@
             <t t-set="lines_to_report" t-value="doc._get_order_lines_to_report()"/>
             <t t-set="display_discount" t-value="any(l.discount for l in lines_to_report)"/>
 
-            <table class="table table-sm o_main_table mt-4">
+            <table class="table table-sm o_main_table table-borderless mt-4">
                 <!-- In case we want to repeat the header, remove "display: table-row-group" -->
                 <thead style="display: table-row-group">
                     <tr>
@@ -149,7 +149,7 @@
             <div class="clearfix" name="so_total_summary">
                 <div id="total" class="row" name="total">
                     <div t-attf-class="#{'col-6' if report_type != 'html' else 'col-sm-7 col-md-6'} ms-auto">
-                        <table class="table table-sm">
+                        <table class="table table-sm table-borderless">
                             <!-- Tax totals -->
                             <t t-set="tax_totals" t-value="doc.tax_totals"/>
                             <t t-call="sale.document_tax_totals"/>