diff --git a/entc/gen/internal/bindata.go b/entc/gen/internal/bindata.go
index d0cb18ef6..48aebc2a1 100644
--- a/entc/gen/internal/bindata.go
+++ b/entc/gen/internal/bindata.go
@@ -1044,7 +1044,7 @@ func templateRuntimeTmpl() (*asset, error) {
 	return a, nil
 }
 
-var _templateTxTmpl = 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\xae\x2e\x56\x47\x0d\xce\xd6\x7b\x7e\x69\x5d\xd7\x9f\x50\xef\x68\x04\xc7\xe3\x3c\xb8\x19\xcc\xc7\xc4\x8d\x91\x8c\x9e\x89\xf3\x1c\xb1\xe0\xf1\xdb\xa0\x79\xe6\x76\x3c\x3d\x74\xdb\xaf\xd6\xda\x35\xeb\x22\xfc\x3c\xe3\x12\xe6\x1a\x9b\x98\x91\x73\x3a\x47\x85\x61\x00\xba\x16\xc3\xb3\x94\x19\x49\x68\x61\x80\x9e\xe0\x8a\xda\xf8\x68\x81\x31\xf5\x03\x4e\x48\xc9\x08\x14\xd6\x3f\x64\x38\xe1\xc6\xcf\xe7\xec\xf6\x6d\xd9\xe7\x01\xe7\xdb\x35\x6a\xbb\xa0\xb3\x4b\x2b\x45\xf1\x67\x66\x9e\xea\xe5\x64\xe8\x89\x2d\xff\xb4\xa9\x03\xd6\xb9\xb1\x3f\x66\xdf\x0b\x73\x07\x80\x9f\x19\xfc\xae\xc7\x72\x18\x41\x7d\xce\xab\xeb\x89\x67\xc9\xf5\xce\x0f\xb4\x1a\xca\x61\x01\xca\xaf\xdb\x05\xec\x82\x97\xfc\xab\xe5\x70\x9c\x3c\x45\xc7\x5a\x89\x97\x31\xe4\x62\xe0\xf3\x78\x36\x8b\xcd\x2b\xfc\x3d\xda\x26\xcb\xeb\xc6\x89\xe8\x2f\xb6\xee\x84\x79\xd5\xbc\x9d\xf2\xf0\xf5\xf9\x0b\xe2\x7e\x1a\xfd\xb9\x35\x75\x26\xbf\xfe\xe2\x73\xf0\xf7\x00\x00\x00\xff\xff\x2f\xa8\x3f\x7e\xdf\x0e\x00\x00")
+var _templateTxTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xac\x57\xdf\x6f\xdb\xbe\x11\x7f\x96\xfe\x8a\x9b\x11\x14\x52\xe0\x4a\x5d\xdf\x16\x20\x0f\x45\xda\x02\x05\xba\x14\x5b\x5d\xac\xc0\x30\xb4\xb4\x78\xb2\x89\xca\xa4\x46\x51\x8e\x3c\xc3\xff\xfb\x70\x47\x52\x92\x63\xb7\xeb\x80\x6f\x1e\xda\x88\xf7\x83\xf7\xe3\x73\x9f\x63\x8e\xc7\xf2\x36\x7d\x30\xed\xc1\xaa\xcd\xd6\xc1\xeb\x57\x7f\xfe\xcb\xcb\xd6\x62\x87\xda\xc1\x7b\x51\xe1\xda\x98\x1f\xf0\x41\x57\x05\xbc\x69\x1a\x60\xa5\x0e\x48\x6e\xf7\x28\x8b\x74\xb5\x55\x1d\x74\xa6\xb7\x15\x42\x65\x24\x82\xea\xa0\x51\x15\xea\x0e\x25\xf4\x5a\xa2\x05\xb7\x45\x78\xd3\x8a\x6a\x8b\xf0\xba\x78\x15\xa5\x50\x9b\x5e\xcb\x54\x69\x96\x7f\xfc\xf0\xf0\xee\xf1\xf3\x3b\xa8\x55\x83\x10\xce\xac\x31\x0e\xa4\xb2\x58\x39\x63\x0f\x60\x6a\x70\xb3\xcb\x9c\x45\x2c\xd2\xdb\xf2\x74\x4a\xd3\xe3\x11\x24\xd6\x4a\x23\x2c\xdc\xb0\x80\x70\xe4\x70\xd7\x36\xc2\x21\x2c\xb6\x28\x24\xda\x05\xdc\xb0\x48\xed\x5a\x63\x1d\x64\x69\xb2\xa8\x8c\x76\x38\xb8\x45\x9a\x2c\xba\x83\xae\x16\x69\x9a\x2c\x36\xca\x6d\xfb\x75\x51\x99\x5d\x59\x87\xfc\x95\xae\xfa\xb5\x70\xc6\x96\xa8\x5d\x29\x95\x68\xb0\x72\x8b\x34\x4f\xd3\xb2\x84\xd5\x40\x39\x0b\x70\x56\xe8\x4e\x54\x4e\x19\x2d\x1a\xa8\x1a\x45\x15\x74\x5b\xe1\x48\x5c\x59\x14\x0e\x25\xac\x0f\x50\x89\xa6\x51\x7a\x03\x0f\xac\x51\xac\x86\x2c\x2f\x52\x77\x68\x91\x3c\x75\xce\xf6\x95\x83\x63\x9a\x54\x46\xd7\x6a\x93\x26\xc7\x23\x58\xa1\x37\x08\x37\xdf\x96\x70\xa3\xe1\xee\x1e\x6e\x8a\x47\x23\xb1\x83\x97\xa7\x53\x9a\x24\x65\x09\xc7\x23\xdc\xe8\xe2\x51\xec\x10\x4e\x27\xba\x8e\xca\x17\x22\xa8\x8d\x05\xa5\x1d\x5a\x0a\x4d\x6f\xe0\x49\xb9\x2d\xcb\xcf\x8d\xd6\xbd\x6a\x24\xda\xae\x48\x93\xe4\x5c\x72\x7b\xf6\xe9\xa3\xe6\xb0\x50\x4b\xae\x27\x45\xd0\x88\xff\xa8\xe6\x00\x8d\x11\x92\x50\x91\x84\xcb\xe9\xe7\x36\x9a\xf8\xb3\x4f\xba\x42\xa0\x62\x17\xf4\x9b\xb7\xae\xcc\xae\x6d\x90\x2a\xc7\xd5\x59\x8b\xea\x07\x05\xb2\xeb\x21\xfe\xb0\xc1\x5f\x7b\x87\x43\x9a\x18\xfd\x60\x76\x3b\x45\xde\xff\xf9\xaf\xba\xd7\x55\x86\xd6\x1a\x9b\x93\xe4\xef\xc6\x9b\x3f\x93\x30\x20\x5e\xc6\x42\x92\x84\xea\xd8\xa8\xce\xc1\xc2\x3b\x5b\xc0\x22\xda\x32\x80\x12\xd2\xbf\x31\xfa\x7d\xaf\xab\x8e\x94\x5b\xab\xb4\x83\x85\xd1\x8b\xe0\x80\x94\x42\xed\xc3\x37\xfd\xde\x98\x27\xb4\xe3\x89\xef\xc4\x0c\x19\x45\x9a\xb0\x28\x73\x03\xdc\xae\x86\x7c\x6e\x9e\xe5\xc0\xe1\x52\xf7\x13\xb4\x96\x6e\x75\x43\xe1\x81\x50\x48\xab\xf6\x68\x8b\xec\xd6\x0d\x6f\xf9\xd7\xbc\x70\x43\x71\x66\x9e\x26\x89\x1b\x8a\x5d\x5f\x7c\x34\xd5\x0f\xfe\x94\x58\xd3\x00\xf2\xe1\x17\xdd\xc4\x63\xc2\xc4\xb7\x25\xd4\x74\x83\xaf\x49\x70\x15\xf3\xa5\x5c\xd2\x24\x49\x6a\x2a\x20\x59\x10\xd0\x2c\xba\xde\x6a\x8a\x31\x4d\x42\xdb\x3f\xe9\x79\xfa\x42\x4a\x1a\x04\xfa\xe4\x5e\x3a\xc3\xed\x04\xa3\x2f\x2b\x73\x51\x88\x33\x57\x59\x0d\xb3\xf6\xe5\x1c\xcc\xef\xa5\x76\x99\xc8\x3d\x88\xb6\x45\x2d\xb3\x0b\xd1\x12\xea\x9c\x52\xa1\x56\x47\x30\x97\x65\x18\x4c\xf0\xe9\x52\x42\x0f\xb3\x59\x5e\x2b\x2d\x3b\xce\xac\xb7\x96\x4f\xe7\xcd\x3d\x4f\xc9\xdb\x65\x79\x1c\x01\x4a\x83\x1a\x3a\xce\x41\xf1\xd6\x64\x9c\xe7\x98\x61\x98\x9b\x7b\x78\xe1\x4d\x8e\xbe\xfb\x77\x13\x10\x4e\x73\xc5\x42\x69\xe5\x28\xef\x53\x9e\xc6\xfe\x8c\x42\x42\xfd\x79\x40\x5e\x9b\xee\xfa\x1f\xac\x42\x23\x17\x4b\x39\x31\xc1\x3d\x3c\xe2\xd3\x15\x36\xc8\xc6\xe0\xf2\x91\x18\xc8\x0b\x4f\x5d\x79\x0b\xb5\xb2\x9d\x03\x4d\xdb\x81\x90\x27\x4d\x05\x38\x08\x1a\x79\x60\xfe\xe6\x51\xf3\x4a\x77\xf7\xa0\xb4\xc4\x61\x8c\xe6\x55\xec\x4a\x84\x3d\x3c\x59\xd1\xfa\xb9\xda\xa8\x3d\x6a\x08\x74\x5c\xac\x06\xcf\x6d\x02\xb4\x69\xc7\xd3\x60\xa4\xe8\xb6\x1d\x6a\x27\x7c\xa3\x88\xb7\xb7\x08\x4a\xa2\x60\xbe\x34\xd0\xf5\x2d\xaf\x85\x59\x3f\x3b\x76\x68\x7a\x47\xc8\x26\xee\x14\xfa\x00\x38\x38\x2b\xfc\xaa\x73\x86\xc3\x98\xa8\xb3\x2c\xe1\x1f\x5b\xd4\x20\xe2\x19\xe3\x9f\xdd\x87\xf1\x25\xb6\x5f\x82\x72\xb0\x41\xe7\x93\xe8\xa8\x92\xb3\x1c\x94\xee\x9c\x20\x6c\x30\x14\x3d\xd1\x09\x2d\x61\x64\x36\x61\x91\x33\xa4\x52\x92\x03\x26\x77\x5a\x39\x31\x0e\x56\x27\x49\xdf\xa1\x85\x5d\xdf\xb9\x38\x86\x48\x3e\x79\x8f\xe2\x8e\xb6\xac\xb1\xbc\x9f\x0d\x11\x30\xdd\x63\x2c\xd8\x78\xcd\x05\x71\x95\x25\x59\x7f\xa8\x41\x40\xd5\x18\x5a\xef\x33\x31\x15\x11\x77\x6b\x94\x12\x25\x7b\xd6\x18\x2e\x82\x0d\x6a\xb4\xbc\xfc\x50\x3b\xe5\x14\x76\xcb\x31\x42\x3e\x39\x90\x5f\xd1\xb6\x8d\x42\x9a\xb6\x7f\xf7\x68\x0f\x4b\x4e\x2f\xa0\xe4\xce\xb3\x24\x01\x24\x02\xaf\xf8\x1b\x69\x7d\xfd\xfa\x95\xca\x49\x9e\xd8\x0a\x9e\x54\xd3\xc0\x1a\x01\x07\xac\x7a\x87\x92\x81\xb3\xb5\xa6\xdf\xf8\x9d\x27\x03\x84\xb6\xaa\xda\x8e\x3b\x99\x5f\x15\x57\x52\x7d\x34\x0e\xfd\xd0\x8f\xd8\x53\x1d\x68\xe3\x60\x63\xac\xe9\x1d\xbd\x37\x3a\x51\x63\xd8\xde\xa3\xd2\xb4\xc3\xf9\xf6\xe9\x56\x84\xce\x09\xeb\xaf\x3c\x2b\x2e\xd4\xd6\xec\x8a\x34\x91\x76\xff\x0c\xb8\xde\xc7\x10\x77\x3a\x3f\xa8\x9a\x03\x61\xf1\x7c\xa9\xb8\x61\x86\xa1\xd4\x4f\x8c\xc6\xa7\xd5\x10\xb2\xa4\xc2\x6a\x7c\x7a\xf6\x48\x09\xa0\xf4\x2c\xc1\xea\x59\xe5\x06\x08\xaf\xa2\xe2\xc1\xff\xbf\x84\xcb\xb8\x72\x98\x16\xd1\xd2\xaf\xad\xdc\xd3\x1b\x7f\xd1\x1c\x4b\xbb\x2f\xbc\xc3\x3c\x4d\x54\xcd\xc7\x7f\xba\x07\xad\x1a\x26\xbb\xc0\x56\x5a\x35\xcb\xb8\x52\xe2\xd9\x8b\xe8\xf9\xe8\x06\x62\x3e\x0e\xe0\x8e\xfe\x39\x2d\xc9\x20\xe4\xb7\x1a\x46\x8e\x7e\x5e\x4f\xe2\x88\x16\x2d\x31\x5f\x8c\xd7\x19\x10\x7b\xa3\x64\x9c\x29\x63\xa7\x91\xe2\x29\x25\x97\xd4\x87\xeb\x43\x55\xc0\xe7\xad\xe9\x1b\x49\xe8\x22\x75\x94\x60\x74\x73\xa0\x07\xdd\x75\xfd\x19\xf5\x4e\x41\x50\x3d\xce\x8b\x9b\x43\x36\x35\x6e\xaa\x24\x8c\x64\xce\x19\x83\xcf\xf8\xad\xd7\x3c\x4b\x3b\x58\xc7\x69\xfb\x5d\xac\x5d\x8b\x2e\xb8\xcf\x72\x82\x30\x61\x6c\x16\x46\x41\xed\x9c\x14\xe2\xa6\x34\x1d\xfa\xd7\x2f\x31\x12\xd3\x42\x74\x3d\xf3\xcb\x6a\xd3\xeb\x06\xa6\xd6\x47\x3f\xbe\x25\x93\x23\xff\xfd\x53\x86\x63\x6e\xfc\x72\xce\x6e\xdf\x57\x43\xe1\xfd\x7c\xbf\x46\x6d\x17\x74\x76\x19\x25\x2b\xfe\x2a\xcc\x11\x2f\x63\xa0\x23\x5b\xfe\xdf\xa1\x46\x5f\xe7\xc1\xfe\x9c\x7d\x2f\xc2\x8d\x0e\x7e\x15\xf0\xbb\x01\xab\xb8\x82\x86\x82\xbe\xae\x37\x9e\x24\xd7\x27\xdf\xd3\xaa\x87\xc3\x12\x84\xdd\x74\x4b\xd8\xfb\x2c\xe9\x8f\xa3\xe3\x69\xf6\x66\x9d\xb0\x12\x2e\x23\x97\xcb\xc8\xe7\xc1\x36\x0f\xc3\xcb\xfc\x3d\xc5\xc6\x9f\xd7\x83\x63\xd1\x1f\x1c\xdd\xe8\xf3\x6a\x78\x7b\x61\xe1\xdb\xf3\x17\xc4\xfd\xbc\xfa\x99\x56\x4d\xce\x7f\x64\x86\x77\xe3\x7f\x03\x00\x00\xff\xff\x9d\x65\x7e\xf5\x46\x0f\x00\x00")
 
 func templateTxTmplBytes() ([]byte, error) {
 	return bindataRead(
@@ -1059,7 +1059,7 @@ func templateTxTmpl() (*asset, error) {
 		return nil, err
 	}
 
-	info := bindataFileInfo{name: "template/tx.tmpl", size: 3807, mode: os.FileMode(420), modTime: time.Unix(1, 0)}
+	info := bindataFileInfo{name: "template/tx.tmpl", size: 3910, mode: os.FileMode(420), modTime: time.Unix(1, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }
diff --git a/entc/gen/template/tx.tmpl b/entc/gen/template/tx.tmpl
index 763ff5638..24dd6ed66 100644
--- a/entc/gen/template/tx.tmpl
+++ b/entc/gen/template/tx.tmpl
@@ -23,6 +23,10 @@ type Tx struct {
 		{{ $n.Name }} *{{ $n.Name }}Client
 	{{ end }}
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -52,9 +56,11 @@ type Tx struct {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/config/ent/tx.go b/entc/integration/config/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/entc/integration/config/ent/tx.go
+++ b/entc/integration/config/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/customid/ent/tx.go b/entc/integration/customid/ent/tx.go
index 4d68e384d..d0dc3c938 100644
--- a/entc/integration/customid/ent/tx.go
+++ b/entc/integration/customid/ent/tx.go
@@ -27,6 +27,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -71,9 +75,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/ent/tx.go b/entc/integration/ent/tx.go
index a05d68bdf..0c9dd6957 100644
--- a/entc/integration/ent/tx.go
+++ b/entc/integration/ent/tx.go
@@ -41,6 +41,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -85,9 +89,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/gremlin/ent/tx.go b/entc/integration/gremlin/ent/tx.go
index a05d68bdf..0c9dd6957 100644
--- a/entc/integration/gremlin/ent/tx.go
+++ b/entc/integration/gremlin/ent/tx.go
@@ -41,6 +41,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -85,9 +89,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/hooks/ent/tx.go b/entc/integration/hooks/ent/tx.go
index 990470f46..c0648f65d 100644
--- a/entc/integration/hooks/ent/tx.go
+++ b/entc/integration/hooks/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/idtype/ent/tx.go b/entc/integration/idtype/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/entc/integration/idtype/ent/tx.go
+++ b/entc/integration/idtype/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/json/ent/tx.go b/entc/integration/json/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/entc/integration/json/ent/tx.go
+++ b/entc/integration/json/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/migrate/entv1/tx.go b/entc/integration/migrate/entv1/tx.go
index 755abced7..380572a1f 100644
--- a/entc/integration/migrate/entv1/tx.go
+++ b/entc/integration/migrate/entv1/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/migrate/entv2/tx.go b/entc/integration/migrate/entv2/tx.go
index 69e97e711..f6cae0513 100644
--- a/entc/integration/migrate/entv2/tx.go
+++ b/entc/integration/migrate/entv2/tx.go
@@ -25,6 +25,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -69,9 +73,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/privacy/ent/tx.go b/entc/integration/privacy/ent/tx.go
index 31f85e2ac..2b5fc7a69 100644
--- a/entc/integration/privacy/ent/tx.go
+++ b/entc/integration/privacy/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// Planet is the client for interacting with the Planet builders.
 	Planet *PlanetClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/entc/integration/template/ent/tx.go b/entc/integration/template/ent/tx.go
index 4b6b65f12..03a9964d3 100644
--- a/entc/integration/template/ent/tx.go
+++ b/entc/integration/template/ent/tx.go
@@ -23,6 +23,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -67,9 +71,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/edgeindex/ent/tx.go b/examples/edgeindex/ent/tx.go
index c7cc2234e..b701ce8ac 100644
--- a/examples/edgeindex/ent/tx.go
+++ b/examples/edgeindex/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// Street is the client for interacting with the Street builders.
 	Street *StreetClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/entcpkg/ent/tx.go b/examples/entcpkg/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/examples/entcpkg/ent/tx.go
+++ b/examples/entcpkg/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/m2m2types/ent/tx.go b/examples/m2m2types/ent/tx.go
index dbaca2990..47c419f0b 100644
--- a/examples/m2m2types/ent/tx.go
+++ b/examples/m2m2types/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/m2mbidi/ent/tx.go b/examples/m2mbidi/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/examples/m2mbidi/ent/tx.go
+++ b/examples/m2mbidi/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/m2mrecur/ent/tx.go b/examples/m2mrecur/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/examples/m2mrecur/ent/tx.go
+++ b/examples/m2mrecur/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/o2m2types/ent/tx.go b/examples/o2m2types/ent/tx.go
index f20b01880..80bf661ce 100644
--- a/examples/o2m2types/ent/tx.go
+++ b/examples/o2m2types/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/o2mrecur/ent/tx.go b/examples/o2mrecur/ent/tx.go
index b7db6a3ea..982edf8a5 100644
--- a/examples/o2mrecur/ent/tx.go
+++ b/examples/o2mrecur/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// Node is the client for interacting with the Node builders.
 	Node *NodeClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/o2o2types/ent/tx.go b/examples/o2o2types/ent/tx.go
index 990470f46..c0648f65d 100644
--- a/examples/o2o2types/ent/tx.go
+++ b/examples/o2o2types/ent/tx.go
@@ -21,6 +21,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -65,9 +69,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/o2obidi/ent/tx.go b/examples/o2obidi/ent/tx.go
index 5271bf78d..3bbb717c4 100644
--- a/examples/o2obidi/ent/tx.go
+++ b/examples/o2obidi/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/o2orecur/ent/tx.go b/examples/o2orecur/ent/tx.go
index b7db6a3ea..982edf8a5 100644
--- a/examples/o2orecur/ent/tx.go
+++ b/examples/o2orecur/ent/tx.go
@@ -19,6 +19,10 @@ type Tx struct {
 	// Node is the client for interacting with the Node builders.
 	Node *NodeClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -63,9 +67,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/start/ent/tx.go b/examples/start/ent/tx.go
index 2b5b0b4c0..b9de0bdf1 100644
--- a/examples/start/ent/tx.go
+++ b/examples/start/ent/tx.go
@@ -23,6 +23,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -67,9 +71,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {
diff --git a/examples/traversal/ent/tx.go b/examples/traversal/ent/tx.go
index 4b6b65f12..03a9964d3 100644
--- a/examples/traversal/ent/tx.go
+++ b/examples/traversal/ent/tx.go
@@ -23,6 +23,10 @@ type Tx struct {
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
+	// lazily loaded.
+	client     *Client
+	clientOnce sync.Once
+
 	// completion callbacks.
 	mu         sync.Mutex
 	onCommit   []func(error)
@@ -67,9 +71,11 @@ func (tx *Tx) OnRollback(f func(error)) {
 
 // Client returns a Client that binds to current transaction.
 func (tx *Tx) Client() *Client {
-	client := &Client{config: tx.config}
-	client.init()
-	return client
+	tx.clientOnce.Do(func() {
+		tx.client = &Client{config: tx.config}
+		tx.client.init()
+	})
+	return tx.client
 }
 
 func (tx *Tx) init() {