diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index 12f753f8d..ba6312f44 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -728,6 +728,8 @@ void CCompositor::focusWindow(CWindow* pWindow, wlr_surface* pSurface) {
         g_pLayoutManager->getCurrentLayout()->onWindowFocusChange(nullptr);
 
         m_pLastFocus = nullptr;
+
+        g_pInputManager->recheckIdleInhibitorStatus();
         return;
     }
 
@@ -787,7 +789,8 @@ void CCompositor::focusWindow(CWindow* pWindow, wlr_surface* pSurface) {
         if (PCONSTRAINT)
             g_pInputManager->constrainMouse(m_sSeat.mouse, PCONSTRAINT);
     }
-    
+
+    g_pInputManager->recheckIdleInhibitorStatus();
 }
 
 void CCompositor::focusSurface(wlr_surface* pSurface, CWindow* pWindowOwner) {
@@ -1691,6 +1694,8 @@ void CCompositor::setWindowFullscreen(CWindow* pWindow, bool on, eFullscreenMode
     g_pXWaylandManager->setWindowSize(pWindow, pWindow->m_vRealSize.goalv(), true);
 
     forceReportSizesToWindowsOnWorkspace(pWindow->m_iWorkspaceID);
+
+    g_pInputManager->recheckIdleInhibitorStatus();
 }
 
 void CCompositor::moveUnmanagedX11ToWindows(CWindow* pWindow) {
diff --git a/src/Window.hpp b/src/Window.hpp
index 236ee47b2..bf77454c4 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -7,6 +7,13 @@
 #include "render/decorations/IHyprWindowDecoration.hpp"
 #include <deque>
 
+enum eIdleInhibitMode {
+    IDLEINHIBIT_NONE = 0,
+    IDLEINHIBIT_ALWAYS,
+    IDLEINHIBIT_FULLSCREEN,
+    IDLEINHIBIT_FOCUS
+};
+
 struct SWindowSpecialRenderData {
     float alpha = 1.f;
     float alphaInactive = -1.f; // -1 means unset
@@ -154,6 +161,9 @@ public:
     uint64_t          m_iLastToplevelMonitorID = -1;
     uint64_t          m_iLastSurfaceMonitorID = -1;
 
+    // for idle inhibiting windows
+    eIdleInhibitMode  m_eIdleInhibitMode = IDLEINHIBIT_NONE;
+
     // For the list lookup
     bool operator==(const CWindow& rhs) {
         return m_uSurface.xdg == rhs.m_uSurface.xdg && m_uSurface.xwayland == rhs.m_uSurface.xwayland && m_vPosition == rhs.m_vPosition && m_vSize == rhs.m_vSize && m_bFadingOut == rhs.m_bFadingOut;
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index d3b6e5071..7e44b41d8 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -756,6 +756,7 @@ bool windowRuleValid(const std::string& RULE) {
         && RULE.find("maxsize") != 0
         && RULE.find("pseudo") != 0
         && RULE.find("monitor") != 0
+        && RULE.find("idleinhibit") != 0
         && RULE != "nofocus"
         && RULE != "noblur"
         && RULE != "noshadow"
diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index 078355434..034a10055 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -201,6 +201,20 @@ void Events::listener_mapWindow(void* owner, void* data) {
         } else if (r.szRule.find("animation") == 0) {
             auto STYLE = r.szRule.substr(r.szRule.find_first_of(' ') + 1);
             PWINDOW->m_sAdditionalConfigData.animationStyle = STYLE;
+        } else if (r.szRule.find("idleinhibit") == 0) {
+            auto IDLERULE = r.szRule.substr(r.szRule.find_first_of(' ') + 1);
+
+            if (IDLERULE == "none") {
+                PWINDOW->m_eIdleInhibitMode = IDLEINHIBIT_NONE;
+            } else if (IDLERULE == "always") {
+                PWINDOW->m_eIdleInhibitMode = IDLEINHIBIT_ALWAYS;
+            } else if (IDLERULE == "focus") {
+                PWINDOW->m_eIdleInhibitMode = IDLEINHIBIT_FOCUS;
+            } else if (IDLERULE == "fullscreen") {
+                PWINDOW->m_eIdleInhibitMode = IDLEINHIBIT_FULLSCREEN;
+            } else {
+                Debug::log(ERR, "Rule idleinhibit: unknown mode %s", IDLERULE.c_str());
+            }
         }
     }
 
diff --git a/src/managers/input/IdleInhibitor.cpp b/src/managers/input/IdleInhibitor.cpp
index 3efb40c68..8c0a3267c 100644
--- a/src/managers/input/IdleInhibitor.cpp
+++ b/src/managers/input/IdleInhibitor.cpp
@@ -49,6 +49,27 @@ void CInputManager::recheckIdleInhibitorStatus() {
         }
     }
 
+    // check manual user-set inhibitors
+    for (auto& w : g_pCompositor->m_vWindows) {
+        if (w->m_eIdleInhibitMode == IDLEINHIBIT_NONE)
+            continue;
+
+        if (w->m_eIdleInhibitMode == IDLEINHIBIT_ALWAYS) {
+            wlr_idle_set_enabled(g_pCompositor->m_sWLRIdle, g_pCompositor->m_sSeat.seat, false);
+            return;
+        }
+
+        if (w->m_eIdleInhibitMode == IDLEINHIBIT_FOCUS && g_pCompositor->isWindowActive(w.get())) {
+            wlr_idle_set_enabled(g_pCompositor->m_sWLRIdle, g_pCompositor->m_sSeat.seat, false);
+            return;
+        }
+
+        if (w->m_eIdleInhibitMode == IDLEINHIBIT_FULLSCREEN && w->m_bIsFullscreen && g_pCompositor->isWorkspaceVisible(w->m_iWorkspaceID)) {
+            wlr_idle_set_enabled(g_pCompositor->m_sWLRIdle, g_pCompositor->m_sSeat.seat, false);
+            return;
+        }
+    }
+
     wlr_idle_set_enabled(g_pCompositor->m_sWLRIdle, g_pCompositor->m_sSeat.seat, true);
     return;
 }
\ No newline at end of file