diff --git a/exercises/bank-account/canonical-data.json b/exercises/bank-account/canonical-data.json
new file mode 100644
index 0000000000..8cf700bcfd
--- /dev/null
+++ b/exercises/bank-account/canonical-data.json
@@ -0,0 +1,382 @@
+{
+  "exercise": "bank-account",
+  "comments": [
+    "This exercise is a good candidate to practice concurrency, which",
+    "may not be available or possible in the implementing language track.",
+    "It is possible to implement this exercise without concurrency."
+  ],
+  "cases": [
+    {
+      "uuid": "983a1528-4ceb-45e5-8257-8ce01aceb5ed",
+      "description": "Newly opened account has zero balance",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 0
+    },
+    {
+      "uuid": "e88d4ec3-c6bf-4752-8e59-5046c44e3ba7",
+      "description": "Single deposit",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 100
+    },
+    {
+      "uuid": "3d9147d4-63f4-4844-8d2b-1fee2e9a2a0d",
+      "description": "Multiple deposits",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "deposit",
+            "amount": 50
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 150
+    },
+    {
+      "uuid": "08f1af07-27ae-4b38-aa19-770bde558064",
+      "description": "Withdraw once",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "withdraw",
+            "amount": 75
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 25
+    },
+    {
+      "uuid": "6f6d242f-8c31-4ac6-8995-a90d42cad59f",
+      "description": "Withdraw twice",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "withdraw",
+            "amount": 80
+          },
+          {
+            "operation": "withdraw",
+            "amount": 20
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 0
+    },
+    {
+      "uuid": "45161c94-a094-4c77-9cec-998b70429bda",
+      "description": "Can do multiple operations sequentially",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "deposit",
+            "amount": 110
+          },
+          {
+            "operation": "withdraw",
+            "amount": 200
+          },
+          {
+            "operation": "deposit",
+            "amount": 60
+          },
+          {
+            "operation": "withdraw",
+            "amount": 50
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 20
+    },
+    {
+      "uuid": "f9facfaa-d824-486e-8381-48832c4bbffd",
+      "description": "Cannot check balance of closed account",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "close"
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": { "error": "account not open" }
+    },
+    {
+      "uuid": "7a65ba52-e35c-4fd2-8159-bda2bde6e59c",
+      "description": "Cannot deposit into closed account",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "close"
+          },
+          {
+            "operation": "deposit",
+            "amount": 50
+          }
+        ]
+      },
+      "expected": { "error": "account not open" }
+    },
+    {
+      "uuid": "a0a1835d-faae-4ad4-a6f3-1fcc2121380b",
+      "description": "Cannot deposit into unopened account",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "deposit",
+            "amount": 50
+          }
+        ]
+      },
+      "expected": { "error": "account not open" }
+    },
+    {
+      "uuid": "570dfaa5-0532-4c1f-a7d3-0f65c3265608",
+      "description": "Cannot withdraw from closed account",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "close"
+          },
+          {
+            "operation": "withdraw",
+            "amount": 50
+          }
+        ]
+      },
+      "expected": { "error": "account not open" }
+    },
+    {
+      "uuid": "c396d233-1c49-4272-98dc-7f502dbb9470",
+      "description": "Cannot close an account that was not opened",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "close"
+          }
+        ]
+      },
+      "expected": { "error": "account not open" }
+    },
+    {
+      "uuid": "c06f534f-bdc2-4a02-a388-1063400684de",
+      "description": "Cannot open an already opened account",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "open"
+          }
+        ]
+      },
+      "expected": { "error": "account already open" }
+    },
+    {
+      "uuid": "0722d404-6116-4f92-ba3b-da7f88f1669c",
+      "description": "Reopened account does not retain balance",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 50
+          },
+          {
+            "operation": "close"
+          },
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 0
+    },
+    {
+      "uuid": "ec42245f-9361-4341-8231-a22e8d19c52f",
+      "description": "Cannot withdraw more than deposited",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 25
+          },
+          {
+            "operation": "withdraw",
+            "amount": 50
+          }
+        ]
+      },
+      "expected": { "error": "amount must be less than balance" }
+    },
+    {
+      "uuid": "4f381ef8-10ef-4507-8e1d-0631ecc8ee72",
+      "description": "Cannot withdraw negative",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": 100
+          },
+          {
+            "operation": "withdraw",
+            "amount": -50
+          }
+        ]
+      },
+      "expected": { "error": "amount must be greater than 0" }
+    },
+    {
+      "uuid": "d45df9ea-1db0-47f3-b18c-d365db49d938",
+      "description": "Cannot deposit negative",
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "deposit",
+            "amount": -50
+          }
+        ]
+      },
+      "expected": { "error": "amount must be greater than 0" }
+    },
+    {
+      "uuid": "ba0c1e0b-0f00-416f-8097-a7dfc97871ff",
+      "description": "Can handle concurrent transactions",
+      "comments": [
+        "This test is a good candidate to practice concurrency, which",
+        "may not be available or possible in the implementing language track.",
+        "Concurrency testing is often made by running the same operations in",
+        "parallel, and then checking that the final state is as expected."
+      ],
+      "scenarios": ["concurrent"],
+      "property": "bankAccount",
+      "input": {
+        "operations": [
+          {
+            "operation": "open"
+          },
+          {
+            "operation": "concurrent",
+            "number": 1000,
+            "operations": [
+              {
+                "operation": "deposit",
+                "amount": 1
+              },
+              {
+                "operation": "withdraw",
+                "amount": 1
+              }
+            ]
+          },
+          {
+            "operation": "balance"
+          }
+        ]
+      },
+      "expected": 0
+    }
+  ]
+}