diff --git a/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices15th.php b/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices15th.php
index 430b59fee..d17abc762 100644
--- a/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices15th.php
+++ b/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices15th.php
@@ -93,6 +93,8 @@ class UpdateMiningTaxesLateInvoices15th implements ShouldQueue
 
                 //Send a reminder to the user through eve mail about the late invoice
                 SendEveMail::dispatch($body, $recipient, $recipientType, $subject, $sender)->delay(Carbon::now()->addSeconds($mailDelay));
+
+                $mailDelay += 20;
             }
         }
     }
diff --git a/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices1st.php b/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices1st.php
index 8c324df6e..203c18d7f 100644
--- a/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices1st.php
+++ b/app/Jobs/Commands/MiningTaxes/Invoices/UpdateMiningTaxesLateInvoices1st.php
@@ -93,6 +93,8 @@ class UpdateMiningTaxesLateInvoices1st implements ShouldQueue
 
                 //Send a reminder to the user through eve mail about the late invoice
                 SendEveMail::dispatch($body, $recipient, $recipientType, $subject, $sender)->delay(Carbon::now()->addSeconds($mailDelay));
+
+                $mailDelay += 20;
             }
         }
     }