diff --git a/watchtower/wtclient/errors.go b/watchtower/wtclient/errors.go
new file mode 100644
index 00000000..71b68cf1
--- /dev/null
+++ b/watchtower/wtclient/errors.go
@@ -0,0 +1,35 @@
+package wtclient
+
+import "errors"
+
+var (
+	// ErrClientExiting signals that the watchtower client is shutting down.
+	ErrClientExiting = errors.New("watchtower client shutting down")
+
+	// ErrTowerCandidatesExhausted signals that a TowerCandidateIterator has
+	// cycled through all available candidates.
+	ErrTowerCandidatesExhausted = errors.New("exhausted all tower " +
+		"candidates")
+
+	// ErrPermanentTowerFailure signals that the tower has reported that it
+	// has permanently failed or the client believes this has happened based
+	// on the tower's behavior.
+	ErrPermanentTowerFailure = errors.New("permanent tower failure")
+
+	// ErrNegotiatorExiting signals that the SessionNegotiator is shutting
+	// down.
+	ErrNegotiatorExiting = errors.New("negotiator exiting")
+
+	// ErrNoTowerAddrs signals that the client could not be created because
+	// we have no addresses with which we can reach a tower.
+	ErrNoTowerAddrs = errors.New("no tower addresses")
+
+	// ErrFailedNegotiation signals that the session negotiator could not
+	// acquire a new session as requested.
+	ErrFailedNegotiation = errors.New("session negotiation unsuccessful")
+
+	// ErrUnregisteredChannel signals that the client was unable to backup a
+	// revoked state becuase the channel had not been previously registered
+	// with the client.
+	ErrUnregisteredChannel = errors.New("channel is not registered")
+)