diff --git a/paper-api/src/main/java/com/destroystokyo/paper/event/block/BeaconEffectEvent.java b/paper-api/src/main/java/com/destroystokyo/paper/event/block/BeaconEffectEvent.java
new file mode 100644
index 0000000000..741d0e73bc
--- /dev/null
+++ b/paper-api/src/main/java/com/destroystokyo/paper/event/block/BeaconEffectEvent.java
@@ -0,0 +1,88 @@
+package com.destroystokyo.paper.event.block;
+
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.block.BlockEvent;
+import org.bukkit.potion.PotionEffect;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when a beacon effect is being applied to a player.
+ */
+@NullMarked
+public class BeaconEffectEvent extends BlockEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final Player player;
+    private final boolean primary;
+    private PotionEffect effect;
+
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public BeaconEffectEvent(final Block block, final PotionEffect effect, final Player player, final boolean primary) {
+        super(block);
+        this.effect = effect;
+        this.player = player;
+        this.primary = primary;
+    }
+
+    /**
+     * Gets the potion effect being applied.
+     *
+     * @return Potion effect
+     */
+    public PotionEffect getEffect() {
+        return this.effect;
+    }
+
+    /**
+     * Sets the potion effect that will be applied.
+     *
+     * @param effect Potion effect
+     */
+    public void setEffect(final PotionEffect effect) {
+        this.effect = effect;
+    }
+
+    /**
+     * Gets the player who the potion effect is being applied to.
+     *
+     * @return Affected player
+     */
+    public Player getPlayer() {
+        return this.player;
+    }
+
+    /**
+     * Gets whether the effect is a primary beacon effect.
+     *
+     * @return {@code true} if this event represents a primary effect
+     */
+    public boolean isPrimary() {
+        return this.primary;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(final boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}