diff --git a/app/scripts/controllers/transactions/index.js b/app/scripts/controllers/transactions/index.js
index 3f6948f06..cfc11c335 100644
--- a/app/scripts/controllers/transactions/index.js
+++ b/app/scripts/controllers/transactions/index.js
@@ -669,15 +669,12 @@ export default class TransactionController extends EventEmitter {
       this._markNonceDuplicatesDropped(txId);
 
       const { submittedTime } = txMeta;
-      const { blockNumber } = txReceipt;
       const metricsParams = { gas_used: gasUsed };
-      const completionTime = await this._getTransactionCompletionTime(
-        blockNumber,
-        submittedTime,
-      );
 
-      if (completionTime) {
-        metricsParams.completion_time = completionTime;
+      if (submittedTime) {
+        metricsParams.completion_time = this._getTransactionCompletionTime(
+          submittedTime,
+        );
       }
 
       if (txReceipt.status === '0x0') {
@@ -1105,20 +1102,8 @@ export default class TransactionController extends EventEmitter {
     });
   }
 
-  async _getTransactionCompletionTime(blockNumber, submittedTime) {
-    const transactionBlock = await this.query.getBlockByNumber(
-      blockNumber.toString(16),
-      false,
-    );
-
-    if (!transactionBlock) {
-      return '';
-    }
-
-    return new BigNumber(transactionBlock.timestamp, 10)
-      .minus(submittedTime / 1000)
-      .round()
-      .toString(10);
+  _getTransactionCompletionTime(submittedTime) {
+    return Math.round((Date.now() - submittedTime) / 1000).toString();
   }
 
   _failTransaction(txId, error) {
diff --git a/app/scripts/controllers/transactions/index.test.js b/app/scripts/controllers/transactions/index.test.js
index d016a80e2..45d7afc65 100644
--- a/app/scripts/controllers/transactions/index.test.js
+++ b/app/scripts/controllers/transactions/index.test.js
@@ -1386,4 +1386,28 @@ describe('Transaction Controller', function () {
       );
     });
   });
+
+  describe('#_getTransactionCompletionTime', function () {
+    let nowStub;
+
+    beforeEach(function () {
+      nowStub = sinon.stub(Date, 'now').returns(1625782016341);
+    });
+
+    afterEach(function () {
+      nowStub.restore();
+    });
+
+    it('calculates completion time (one)', function () {
+      const submittedTime = 1625781997397;
+      const result = txController._getTransactionCompletionTime(submittedTime);
+      assert.equal(result, '19');
+    });
+
+    it('calculates completion time (two)', function () {
+      const submittedTime = 1625781995397;
+      const result = txController._getTransactionCompletionTime(submittedTime);
+      assert.equal(result, '21');
+    });
+  });
 });