diff --git a/app/main/views/dashboard.py b/app/main/views/dashboard.py
index 7120be291..fe942bf46 100644
--- a/app/main/views/dashboard.py
+++ b/app/main/views/dashboard.py
@@ -377,10 +377,13 @@ def get_dashboard_totals(statistics):
 
 
 def calculate_usage(usage, free_sms_fragment_limit):
+    sms_breakdowns = [breakdown for breakdown in usage if breakdown['notification_type'] == 'sms']
+
+    # this relies on the assumption: only one SMS rate per financial year.
+    sms_rate = 0 if len(sms_breakdowns) == 0 else sms_breakdowns[0].get("rate", 0)
+    sms_sent = get_sum_billing_units(sms_breakdowns)
     sms_free_allowance = free_sms_fragment_limit
 
-    sms_rate = 0 if len(usage) == 0 else usage[0].get("rate", 0)
-    sms_sent = get_sum_billing_units(breakdown for breakdown in usage if breakdown['notification_type'] == 'sms')
     emails = [breakdown["billing_units"] for breakdown in usage if breakdown['notification_type'] == 'email']
     emails_sent = 0 if len(emails) == 0 else emails[0]
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 5040371fb..7fd67fac6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2181,6 +2181,8 @@ def mock_get_template_statistics_for_template(mocker, service_one):
 def mock_get_usage(mocker, service_one, fake_uuid):
     def _get_usage(service_id, year=None):
         return [
+            {"international": False, "rate": 0.00, "notification_type": "email",
+             "rate_multiplier": None, "billing_units": 1000},
             {"international": False, "rate": 0.0165, "rate_multiplier": 1,
              "notification_type": "sms", "billing_units": 251500},
             {"international": True, "rate": 0.0165, "rate_multiplier": 1,
@@ -2189,8 +2191,6 @@ def mock_get_usage(mocker, service_one, fake_uuid):
              "notification_type": "sms", "billing_units": 150},
             {"international": True, "rate": 0.0165, "rate_multiplier": 3,
              "notification_type": "sms", "billing_units": 30},
-            {"international": False, "rate": 0.0165, "notification_type": "email",
-             "rate_multiplier": None, "billing_units": 1000}
         ]
 
     return mocker.patch(