diff --git a/recurly/__init__.py b/recurly/__init__.py
index c4003d3f..e2f6e2f9 100644
--- a/recurly/__init__.py
+++ b/recurly/__init__.py
@@ -301,6 +301,7 @@ class BillingInfo(Resource):
         'account_type',
         'routing_number',
         'account_number',
+        'currency',
     )
     sensitive_attributes = ('number', 'verification_value', 'account_number')
     xml_attribute_attributes = ('type',)
diff --git a/tests/fixtures/billing-info/account-embed-created.xml b/tests/fixtures/billing-info/account-embed-created.xml
index 304684f7..e0a45235 100644
--- a/tests/fixtures/billing-info/account-embed-created.xml
+++ b/tests/fixtures/billing-info/account-embed-created.xml
@@ -20,6 +20,7 @@ Content-Type: application/xml; charset=utf-8
     <state>CA</state>
     <zip>94105</zip>
     <country>US</country>
+    <currency>USD</currency>
   </billing_info>
 </account>
 
diff --git a/tests/fixtures/billing-info/account-embed-token.xml b/tests/fixtures/billing-info/account-embed-token.xml
index ec167b6f..908f90f1 100644
--- a/tests/fixtures/billing-info/account-embed-token.xml
+++ b/tests/fixtures/billing-info/account-embed-token.xml
@@ -10,6 +10,7 @@ Content-Type: application/xml; charset=utf-8
   <account_code>binfo-mock-3</account_code>
   <billing_info>
     <token_id>abc123</token_id>
+    <currency>USD</currency>
   </billing_info>
 </account>
 
diff --git a/tests/fixtures/billing-info/created.xml b/tests/fixtures/billing-info/created.xml
index d6583cb3..c15e4b4c 100644
--- a/tests/fixtures/billing-info/created.xml
+++ b/tests/fixtures/billing-info/created.xml
@@ -18,6 +18,7 @@ Content-Type: application/xml; charset=utf-8
   <state>CA</state>
   <zip>94105</zip>
   <country>US</country>
+  <currency>USD</currency>
 </billing_info>
 
 HTTP/1.1 201 Created
@@ -38,4 +39,5 @@ Location: https://api.recurly.com/v2/accounts/binfomock/billing_info
   <month type="integer">12</month>
   <first_six>411111</first_six>
   <last_four>1111</last_four>
+  <currency>USD</currency>
 </billing_info>
diff --git a/tests/fixtures/billing-info/embedded-exists.xml b/tests/fixtures/billing-info/embedded-exists.xml
index c68380e9..eb0e2e99 100644
--- a/tests/fixtures/billing-info/embedded-exists.xml
+++ b/tests/fixtures/billing-info/embedded-exists.xml
@@ -20,4 +20,5 @@ Content-Type: application/xml; charset=utf-8
   <card_type>visa</card_type>
   <first_six>411111</first_six>
   <last_four>1111</last_four>
+  <currency>USD</currency>
 </billing_info>
diff --git a/tests/fixtures/coupon/subscribed.xml b/tests/fixtures/coupon/subscribed.xml
index ebe62918..535a4dff 100644
--- a/tests/fixtures/coupon/subscribed.xml
+++ b/tests/fixtures/coupon/subscribed.xml
@@ -24,6 +24,7 @@ Content-Type: application/xml; charset=utf-8
       <state>CA</state>
       <zip>94105</zip>
       <country>US</country>
+      <currency>USD</currency>
     </billing_info>
   </account>
 </subscription>
diff --git a/tests/fixtures/subscribe-add-on/subscribed.xml b/tests/fixtures/subscribe-add-on/subscribed.xml
index dba672bc..1f21fb3e 100644
--- a/tests/fixtures/subscribe-add-on/subscribed.xml
+++ b/tests/fixtures/subscribe-add-on/subscribed.xml
@@ -31,6 +31,7 @@ Content-Type: application/xml; charset=utf-8
       <state>CA</state>
       <zip>94105</zip>
       <country>US</country>
+      <currency>USD</currency>
     </billing_info>
   </account>
 </subscription>
diff --git a/tests/fixtures/subscription/subscribe-embedded-account.xml b/tests/fixtures/subscription/subscribe-embedded-account.xml
index 4d9b125d..1b19370b 100644
--- a/tests/fixtures/subscription/subscribe-embedded-account.xml
+++ b/tests/fixtures/subscription/subscribe-embedded-account.xml
@@ -23,6 +23,7 @@ Content-Type: application/xml; charset=utf-8
       <state>CA</state>
       <zip>94105</zip>
       <country>US</country>
+      <currency>USD</currency>
     </billing_info>
   </account>
 </subscription>
diff --git a/tests/fixtures/subscription/subscribed-billing-info.xml b/tests/fixtures/subscription/subscribed-billing-info.xml
index 5ada9217..64487658 100644
--- a/tests/fixtures/subscription/subscribed-billing-info.xml
+++ b/tests/fixtures/subscription/subscribed-billing-info.xml
@@ -23,6 +23,7 @@ Content-Type: application/xml; charset=utf-8
       <state>CA</state>
       <zip>94105</zip>
       <country>US</country>
+      <currency>USD</currency>
     </billing_info>
   </account>
 </subscription>
diff --git a/tests/fixtures/subscription/update-billing-info.xml b/tests/fixtures/subscription/update-billing-info.xml
index 48d80c0f..c5853a60 100644
--- a/tests/fixtures/subscription/update-billing-info.xml
+++ b/tests/fixtures/subscription/update-billing-info.xml
@@ -18,6 +18,7 @@ Content-Type: application/xml; charset=utf-8
   <state>CA</state>
   <zip>94105</zip>
   <country>US</country>
+  <currency>USD</currency>
 </billing_info>
 
 HTTP/1.1 201 Created
@@ -38,4 +39,5 @@ Location: https://api.recurly.com/v2/accounts/subscribemock/billing_info
   <month type="integer">12</month>
   <first_six>411111</first_six>
   <last_four>1111</last_four>
+  <currency>USD</currency>
 </billing_info>
diff --git a/tests/fixtures/transaction-balance/set-billing-info.xml b/tests/fixtures/transaction-balance/set-billing-info.xml
index 128954fb..9f338f41 100644
--- a/tests/fixtures/transaction-balance/set-billing-info.xml
+++ b/tests/fixtures/transaction-balance/set-billing-info.xml
@@ -18,6 +18,7 @@ Content-Type: application/xml; charset=utf-8
   <state>CA</state>
   <zip>94105</zip>
   <country>US</country>
+  <currency>USD</currency>
 </billing_info>
 
 HTTP/1.1 201 Created
@@ -38,4 +39,5 @@ Location: https://api.recurly.com/v2/accounts/transbalancemock/billing_info
   <month type="integer">12</month>
   <first_six>411111</first_six>
   <last_four>1111</last_four>
+  <currency>USD</currency>
 </billing_info>
diff --git a/tests/fixtures/transaction/created.xml b/tests/fixtures/transaction/created.xml
index 09516b99..496a5004 100644
--- a/tests/fixtures/transaction/created.xml
+++ b/tests/fixtures/transaction/created.xml
@@ -21,6 +21,7 @@ Content-Type: application/xml; charset=utf-8
       <state>CA</state>
       <zip>94105</zip>
       <country>US</country>
+      <currency>USD</currency>
     </billing_info>
   </account>
   <currency>USD</currency>