diff --git a/src/company_cmd.cpp b/src/company_cmd.cpp
index f5bb4d9433..b83d08d8e5 100644
--- a/src/company_cmd.cpp
+++ b/src/company_cmd.cpp
@@ -39,6 +39,7 @@
 #include "timer/timer.h"
 #include "timer/timer_game_economy.h"
 #include "timer/timer_game_tick.h"
+#include "timer/timer_window.h"
 
 #include "widgets/statusbar_widget.h"
 
@@ -219,8 +220,7 @@ void InvalidateCompanyWindows(const Company *company)
 /**
  * Refresh all company finance windows previously marked dirty.
  */
-void InvalidateCompanyWindows()
-{
+static const IntervalTimer<TimerWindow> invalidate_company_windows_interval(std::chrono::milliseconds(1), [](auto) {
 	for (CompanyID cid : _dirty_company_finances) {
 		if (cid == _local_company) SetWindowWidgetDirty(WC_STATUS_BAR, 0, WID_S_RIGHT);
 		Window *w = FindWindowById(WC_FINANCES, cid);
@@ -233,8 +233,8 @@ void InvalidateCompanyWindows()
 		}
 		SetWindowWidgetDirty(WC_COMPANY, cid, WID_C_DESC_COMPANY_VALUE);
 	}
-	_dirty_company_finances = {};
-}
+	_dirty_company_finances.Reset();
+});
 
 /**
  * Get the amount of money that a company has available, or INT64_MAX
diff --git a/src/company_gui.h b/src/company_gui.h
index 0e951eb5c7..f6149b05fb 100644
--- a/src/company_gui.h
+++ b/src/company_gui.h
@@ -23,7 +23,6 @@ void ShowCompanyFinances(CompanyID company);
 void ShowCompany(CompanyID company);
 
 void InvalidateCompanyWindows(const Company *c);
-void InvalidateCompanyWindows();
 void CloseCompanyWindows(CompanyID company);
 void DirtyCompanyInfrastructureWindows(CompanyID company);
 
diff --git a/src/openttd.cpp b/src/openttd.cpp
index a87e1d0353..10ea0951e0 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1244,7 +1244,6 @@ void StateGameLoop()
 
 		CallWindowGameTickEvent();
 		NewsLoop();
-		InvalidateCompanyWindows();
 	} else {
 		if (_debug_desync_level > 2 && TimerGameEconomy::date_fract == 0 && (TimerGameEconomy::date.base() & 0x1F) == 0) {
 			/* Save the desync savegame if needed. */
@@ -1281,7 +1280,6 @@ void StateGameLoop()
 
 		CallWindowGameTickEvent();
 		NewsLoop();
-		InvalidateCompanyWindows();
 		cur_company.Restore();
 	}