diff --git a/homeassistant/components/homekit/type_fans.py b/homeassistant/components/homekit/type_fans.py
index 7ed7256d48c..d7215be9508 100644
--- a/homeassistant/components/homekit/type_fans.py
+++ b/homeassistant/components/homekit/type_fans.py
@@ -7,6 +7,7 @@ from homeassistant.components.fan import (
     ATTR_DIRECTION,
     ATTR_OSCILLATING,
     ATTR_PERCENTAGE,
+    ATTR_PERCENTAGE_STEP,
     DIRECTION_FORWARD,
     DIRECTION_REVERSE,
     DOMAIN,
@@ -33,6 +34,7 @@ from .const import (
     CHAR_ROTATION_DIRECTION,
     CHAR_ROTATION_SPEED,
     CHAR_SWING_MODE,
+    PROP_MIN_STEP,
     SERV_FANV2,
 )
 
@@ -53,6 +55,7 @@ class Fan(HomeAccessory):
         state = self.hass.states.get(self.entity_id)
 
         features = state.attributes.get(ATTR_SUPPORTED_FEATURES, 0)
+        percentage_step = state.attributes.get(ATTR_PERCENTAGE_STEP, 1)
 
         if features & SUPPORT_DIRECTION:
             chars.append(CHAR_ROTATION_DIRECTION)
@@ -77,7 +80,11 @@ class Fan(HomeAccessory):
             # Initial value is set to 100 because 0 is a special value (off). 100 is
             # an arbitrary non-zero value. It is updated immediately by async_update_state
             # to set to the correct initial value.
-            self.char_speed = serv_fan.configure_char(CHAR_ROTATION_SPEED, value=100)
+            self.char_speed = serv_fan.configure_char(
+                CHAR_ROTATION_SPEED,
+                value=100,
+                properties={PROP_MIN_STEP: percentage_step},
+            )
 
         if CHAR_SWING_MODE in chars:
             self.char_swing = serv_fan.configure_char(CHAR_SWING_MODE, value=0)
diff --git a/tests/components/homekit/test_type_fans.py b/tests/components/homekit/test_type_fans.py
index 8111d256594..e99f9d0b95a 100644
--- a/tests/components/homekit/test_type_fans.py
+++ b/tests/components/homekit/test_type_fans.py
@@ -6,6 +6,7 @@ from homeassistant.components.fan import (
     ATTR_DIRECTION,
     ATTR_OSCILLATING,
     ATTR_PERCENTAGE,
+    ATTR_PERCENTAGE_STEP,
     DIRECTION_FORWARD,
     DIRECTION_REVERSE,
     DOMAIN,
@@ -13,7 +14,7 @@ from homeassistant.components.fan import (
     SUPPORT_OSCILLATE,
     SUPPORT_SET_SPEED,
 )
-from homeassistant.components.homekit.const import ATTR_VALUE
+from homeassistant.components.homekit.const import ATTR_VALUE, PROP_MIN_STEP
 from homeassistant.components.homekit.type_fans import Fan
 from homeassistant.const import (
     ATTR_ENTITY_ID,
@@ -254,6 +255,7 @@ async def test_fan_speed(hass, hk_driver, events):
         {
             ATTR_SUPPORTED_FEATURES: SUPPORT_SET_SPEED,
             ATTR_PERCENTAGE: 0,
+            ATTR_PERCENTAGE_STEP: 25,
         },
     )
     await hass.async_block_till_done()
@@ -263,6 +265,7 @@ async def test_fan_speed(hass, hk_driver, events):
     # Initial value can be anything but 0. If it is 0, it might cause HomeKit to set the
     # speed to 100 when turning on a fan on a freshly booted up server.
     assert acc.char_speed.value != 0
+    assert acc.char_speed.properties[PROP_MIN_STEP] == 25
 
     await acc.run_handler()
     await hass.async_block_till_done()