diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index acf8da618a..48c29408d5 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -6,6 +6,7 @@
 - Feature: [#19547] Add large sloped turns to hybrid coaster and single rail coaster.
 - Feature: [OpenMusic#25] Added Prehistoric ride music style.
 - Improved: [#18490] Reduce guests walking through trains on level crossing next to station.
+- Improved: [#18996] When marketing campaigns are disabled, disable the Marketing tab in the Finances window.
 - Improved: [#19764] Miscellaneous scenery tab now grouped next to the all-scenery tab.
 - Improved: [#19830] “Highlight path issues” will now hide wall elements.
 - Fix: [#12598] Number of holes is not set correctly when saving track designs.
diff --git a/src/openrct2-ui/windows/Finances.cpp b/src/openrct2-ui/windows/Finances.cpp
index 876251a2f0..a8a5207441 100644
--- a/src/openrct2-ui/windows/Finances.cpp
+++ b/src/openrct2-ui/windows/Finances.cpp
@@ -226,6 +226,11 @@ class FinancesWindow final : public Window
 private:
     uint32_t _lastPaintedMonth;
 
+    void SetDisabledTabs()
+    {
+        disabled_widgets = (gParkFlags & PARK_FLAGS_FORBID_MARKETING_CAMPAIGN) ? (1uLL << WIDX_TAB_5) : 0;
+    }
+
 public:
     void OnOpen() override
     {
@@ -299,7 +304,7 @@ public:
             WindowInitScrollWidgets(*this);
         }
 
-        disabled_widgets = 0;
+        WindowAlignTabs(this, WIDX_TAB_1, WIDX_TAB_6);
 
         for (auto i = 0; i < WINDOW_FINANCES_PAGE_COUNT; i++)
             SetWidgetPressed(WIDX_TAB_1 + i, false);
@@ -443,8 +448,9 @@ public:
         hold_down_widgets = _windowFinancesPageHoldDownWidgets[p];
         pressed_widgets = 0;
         widgets = _windowFinancesPageWidgets[p];
-
+        SetDisabledTabs();
         Invalidate();
+
         if (p == WINDOW_FINANCES_PAGE_RESEARCH)
         {
             width = WW_RESEARCH;