diff --git a/app/main/views/dashboard.py b/app/main/views/dashboard.py
index 90de7ae15..1d143ec31 100644
--- a/app/main/views/dashboard.py
+++ b/app/main/views/dashboard.py
@@ -406,7 +406,6 @@ def get_sum_billing_units(billing_units, month=None):
 
 def get_free_paid_breakdown_for_billable_units(year, free_sms_fragment_limit, billing_units):
     cumulative = 0
-    letter_cumulative = 0
     sms_units = [x for x in billing_units if x['notification_type'] == 'sms']
     letter_units = [x for x in billing_units if x['notification_type'] == 'letter']
     for month in get_months_for_financial_year(year):
@@ -424,14 +423,13 @@ def get_free_paid_breakdown_for_billable_units(year, free_sms_fragment_limit, bi
         letter_total = 0
         for x in letter_billing:
             letter_total += x.cost
-            letter_cumulative += letter_total
         yield {
             'name': month,
             'letter_total': letter_total,
-            'letter_cumulative': letter_cumulative,
-            'paid': breakdown['paid'],
-            'free': breakdown['free'],
-            'letters': letter_billing
+            'letters': letter_billing,
+            'sms_paid_count': breakdown['paid'],
+            'sms_free_count': breakdown['free'],
+            'sms_rate': breakdown['sms_rate'],
         }
 
 
@@ -479,23 +477,31 @@ def get_free_paid_breakdown_for_month(
 ):
     allowance = free_sms_fragment_limit
 
+    # makes the assumption that there is either no item in `monthly_usage` because they have not sent any SMS
+    # or that they have sent SMS and that there is only a single item in `monthly_usage` because they have only
+    # been sent at a single rate during the month
+    sms_rate = monthly_usage[0]['rate'] if len(monthly_usage) else 0
+
     total_monthly_billing_units = get_sum_billing_units(monthly_usage)
 
     if cumulative < allowance:
         return {
             'paid': 0,
             'free': total_monthly_billing_units,
+            'sms_rate': sms_rate,
         }
     elif previous_cumulative < allowance:
         remaining_allowance = allowance - previous_cumulative
         return {
             'paid': total_monthly_billing_units - remaining_allowance,
             'free': remaining_allowance,
+            'sms_rate': sms_rate,
         }
     else:
         return {
             'paid': total_monthly_billing_units,
             'free': 0,
+            'sms_rate': sms_rate,
         }
 
 
diff --git a/app/templates/views/usage.html b/app/templates/views/usage.html
index 43f7ce51a..4479c97fa 100644
--- a/app/templates/views/usage.html
+++ b/app/templates/views/usage.html
@@ -97,17 +97,17 @@
             {% endcall %}
             {% call field(align='left') %}
               {{ big_number(
-                (sms_rate * month.paid) + month.letter_total,
+                (month.sms_rate * month.sms_paid_count) + month.letter_total,
                 currency="£",
                 smallest=True
               ) }}
               <ul>
-              {% if month.free %}
-                <li class="tabular-numbers">{{ month.free|format_thousands }} free {{ month.free|message_count_label('sms', suffix='') }}</li>
+              {% if month.sms_free_count %}
+                <li class="tabular-numbers">{{ month.sms_free_count|format_thousands }} free {{ month.sms_free_count|message_count_label('sms', suffix='') }}</li>
               {% endif %}
-              {% if month.paid %}
-                <li class="tabular-numbers">{{ month.paid|message_count('sms') }} at
-                {{- ' {:.2f}p'.format(sms_rate * 100) }}</li>
+              {% if month.sms_paid_count %}
+                <li class="tabular-numbers">{{ month.sms_paid_count|message_count('sms') }} at
+                {{- ' {:.2f}p'.format(month.sms_rate * 100) }}</li>
               {% endif %}
               {% for letter in month.letters%}
                 {% if letter.billing_units %}
@@ -115,7 +115,7 @@
                   {{ letter.rate | format_number_in_pounds_as_currency }}</li>
                 {% endif %}
               {% endfor %}
-              {% if not (month.free or month.paid or month.letters) %}
+              {% if not (month.sms_free_count or month.sms_paid_count or month.letters) %}
                 <li aria-hidden="true">–</li>
               {% endif %}
               </ul>
diff --git a/tests/app/main/views/test_dashboard.py b/tests/app/main/views/test_dashboard.py
index 8939ae9d3..de47ffde5 100644
--- a/tests/app/main/views/test_dashboard.py
+++ b/tests/app/main/views/test_dashboard.py
@@ -1022,8 +1022,8 @@ def test_usage_page(
     assert 'March' in table
     assert '£28.99' in table
     assert '140 free text messages' in table
-    assert '£20.30' in table
-    assert '1,230 text messages at 1.65p' in table
+    assert '£20.91' in table
+    assert '1,230 text messages at 1.70p' in table
 
 
 @freeze_time("2012-03-31 12:12:12")
@@ -1064,8 +1064,8 @@ def test_usage_page_with_letters(
     assert 'March' in table
     assert '£28.99' in table
     assert '140 free text messages' in table
-    assert '£20.30' in table
-    assert '1,230 text messages at 1.65p' in table
+    assert '£20.91' in table
+    assert '1,230 text messages at 1.70p' in table
     assert '10 second class letters at 31p' in normalize_spaces(table)
     assert '5 first class letters at 33p' in normalize_spaces(table)
     assert '10 international letters at 84p' in normalize_spaces(table)
@@ -1586,27 +1586,111 @@ def test_get_free_paid_breakdown_for_billable_units(now, expected_number_of_mont
                 },
                 {
                     'month': 'June', 'international': False, 'rate_multiplier': 1,
-                    'notification_type': 'sms', 'rate': 1.65, 'billing_units': 100000
+                    'notification_type': 'sms', 'rate': 1.71, 'billing_units': 100000
                 },
                 {
                     'month': 'February', 'international': False, 'rate_multiplier': 1,
-                    'notification_type': 'sms', 'rate': 1.65, 'billing_units': 2000
+                    'notification_type': 'sms', 'rate': 1.71, 'billing_units': 2000
                 },
             ]
         )
         assert list(billing_units) == [
-            {'free': 100000, 'name': 'April', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 100000, 'name': 'May', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 50000, 'name': 'June', 'paid': 50000, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'July', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'August', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'September', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'October', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'November', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'December', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'January', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'February', 'paid': 2000, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0},
-            {'free': 0, 'name': 'March', 'paid': 0, 'letter_total': 0, 'letters': [], 'letter_cumulative': 0}
+            {
+                'sms_free_count': 100000,
+                'name': 'April',
+                'sms_paid_count': 0,
+                'sms_rate': 1.65,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 100000,
+                'name': 'May',
+                'sms_paid_count': 0,
+                'sms_rate': 1.65,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 50000,
+                'name': 'June',
+                'sms_paid_count': 50000,
+                'sms_rate': 1.71,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'July',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'August',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'September',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'October',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'November',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'December',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'January',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'February',
+                'sms_paid_count': 2000,
+                'sms_rate': 1.71,
+                'letter_total': 0,
+                'letters': []
+            },
+            {
+                'sms_free_count': 0,
+                'name': 'March',
+                'sms_paid_count': 0,
+                'sms_rate': 0,
+                'letter_total': 0,
+                'letters': []
+            },
         ][:expected_number_of_months]
 
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 84bebc261..f5e397870 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2334,56 +2334,56 @@ def mock_get_billable_units(mocker):
             {
                 'month': 'April',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 249500,
                 'postage': 'none',
             },
             {
                 'month': 'April',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 100,
                 'postage': 'none',
             },
             {
                 'month': 'April',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 200,
                 'postage': 'none',
             },
             {
                 'month': 'April',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 60,
                 'postage': 'none',
             },
             {
                 'month': 'March',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 1000,
                 'postage': 'none',
             },
             {
                 'month': 'March',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 100,
                 'postage': 'none',
             },
             {
                 'month': 'March',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 100,
                 'postage': 'none',
             },
             {
                 'month': 'March',
                 'notification_type': 'sms',
-                'rate': 0.0165,
+                'rate': 0.017,
                 'billing_units': 30,
                 'postage': 'none',
             },