diff --git a/homeassistant/components/voip/assist_satellite.py b/homeassistant/components/voip/assist_satellite.py
index 1026df8d0d9..a0aeaaf38d3 100644
--- a/homeassistant/components/voip/assist_satellite.py
+++ b/homeassistant/components/voip/assist_satellite.py
@@ -30,7 +30,15 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import Context, HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 
-from .const import CHANNELS, CONF_SIP_PORT, DOMAIN, RATE, RTP_AUDIO_SETTINGS, WIDTH
+from .const import (
+    CHANNELS,
+    CONF_SIP_PORT,
+    CONF_SIP_USER,
+    DOMAIN,
+    RATE,
+    RTP_AUDIO_SETTINGS,
+    WIDTH,
+)
 from .devices import VoIPDevice
 from .entity import VoIPEntity
 
@@ -199,7 +207,10 @@ class VoipAssistSatellite(VoIPEntity, AssistSatelliteEntity, RtpDatagramProtocol
         # HA SIP server
         source_ip = await async_get_source_ip(self.hass)
         sip_port = self.config_entry.options.get(CONF_SIP_PORT, SIP_PORT)
-        source_endpoint = get_sip_endpoint(host=source_ip, port=sip_port)
+        sip_user = self.config_entry.options.get(CONF_SIP_USER)
+        source_endpoint = get_sip_endpoint(
+            host=source_ip, port=sip_port, username=sip_user
+        )
 
         try:
             # VoIP ID is SIP header
diff --git a/homeassistant/components/voip/config_flow.py b/homeassistant/components/voip/config_flow.py
index 63dcb8f86ee..7ae603f0f6a 100644
--- a/homeassistant/components/voip/config_flow.py
+++ b/homeassistant/components/voip/config_flow.py
@@ -16,7 +16,7 @@ from homeassistant.config_entries import (
 from homeassistant.core import callback
 from homeassistant.helpers import config_validation as cv
 
-from .const import CONF_SIP_PORT, DOMAIN
+from .const import CONF_SIP_PORT, CONF_SIP_USER, DOMAIN
 
 
 class VoIPConfigFlow(ConfigFlow, domain=DOMAIN):
@@ -58,7 +58,15 @@ class VoipOptionsFlowHandler(OptionsFlow):
     ) -> ConfigFlowResult:
         """Manage the options."""
         if user_input is not None:
-            return self.async_create_entry(title="", data=user_input)
+            if CONF_SIP_USER in user_input and not user_input[CONF_SIP_USER]:
+                del user_input[CONF_SIP_USER]
+            self.hass.config_entries.async_update_entry(
+                self.config_entry, options=user_input
+            )
+            return self.async_create_entry(
+                title="",
+                data=user_input,
+            )
 
         return self.async_show_form(
             step_id="init",
@@ -70,7 +78,15 @@ class VoipOptionsFlowHandler(OptionsFlow):
                             CONF_SIP_PORT,
                             SIP_PORT,
                         ),
-                    ): cv.port
+                    ): cv.port,
+                    vol.Optional(
+                        CONF_SIP_USER,
+                        description={
+                            "suggested_value": self.config_entry.options.get(
+                                CONF_SIP_USER, None
+                            )
+                        },
+                    ): vol.Any(None, cv.string),
                 }
             ),
         )
diff --git a/homeassistant/components/voip/const.py b/homeassistant/components/voip/const.py
index b4ee5d8ce7a..9a4403f9df2 100644
--- a/homeassistant/components/voip/const.py
+++ b/homeassistant/components/voip/const.py
@@ -13,3 +13,4 @@ RTP_AUDIO_SETTINGS = {
 }
 
 CONF_SIP_PORT = "sip_port"
+CONF_SIP_USER = "sip_user"
diff --git a/homeassistant/components/voip/strings.json b/homeassistant/components/voip/strings.json
index c25c22f3f80..96c902bf39a 100644
--- a/homeassistant/components/voip/strings.json
+++ b/homeassistant/components/voip/strings.json
@@ -53,7 +53,8 @@
     "step": {
       "init": {
         "data": {
-          "sip_port": "SIP port"
+          "sip_port": "SIP port",
+          "sip_user": "SIP user"
         }
       }
     }
diff --git a/tests/components/voip/test_config_flow.py b/tests/components/voip/test_config_flow.py
index 1b7aaad7c03..05f14afa4e7 100644
--- a/tests/components/voip/test_config_flow.py
+++ b/tests/components/voip/test_config_flow.py
@@ -80,3 +80,30 @@ async def test_options_flow(hass: HomeAssistant) -> None:
     )
     assert result["type"] is FlowResultType.CREATE_ENTRY
     assert config_entry.options == {"sip_port": 5061}
+
+    # Manual with user
+    result = await hass.config_entries.options.async_init(
+        config_entry.entry_id,
+    )
+    result = await hass.config_entries.options.async_configure(
+        result["flow_id"],
+        user_input={"sip_port": 5061, "sip_user": "HA"},
+    )
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert config_entry.options == {"sip_port": 5061, "sip_user": "HA"}
+
+    # Manual remove user
+    result = await hass.config_entries.options.async_init(
+        config_entry.entry_id,
+    )
+
+    assert config_entry.options == {"sip_port": 5061, "sip_user": "HA"}
+
+    result = await hass.config_entries.options.async_configure(
+        result["flow_id"],
+        user_input={"sip_port": 5060, "sip_user": ""},
+    )
+    await hass.async_block_till_done()
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert config_entry.options == {"sip_port": 5060}