diff --git a/.changeset/popular-walls-fetch.md b/.changeset/popular-walls-fetch.md
new file mode 100644
index 0000000000..68e1b6d42e
--- /dev/null
+++ b/.changeset/popular-walls-fetch.md
@@ -0,0 +1,5 @@
+---
+'svelte': minor
+---
+
+feat: pass AbortSignal to effects and allow async signature
diff --git a/packages/svelte/src/ambient.d.ts b/packages/svelte/src/ambient.d.ts
index 5297cb6c32..87ba0a70a6 100644
--- a/packages/svelte/src/ambient.d.ts
+++ b/packages/svelte/src/ambient.d.ts
@@ -234,7 +234,9 @@ declare namespace $derived {
  * https://svelte.dev/docs/svelte/$effect
  * @param fn The function to execute
  */
-declare function $effect(fn: (input: { signal: AbortSignal }) => void | ((input: { signal: AbortSignal }) => void)): void;
+declare function $effect(
+	fn: (input: { signal: AbortSignal }) => void | (() => void) | Promise<void>
+): void;
 
 declare namespace $effect {
 	/**
@@ -253,7 +255,9 @@ declare namespace $effect {
 	 * https://svelte.dev/docs/svelte/$effect#$effect.pre
 	 * @param fn The function to execute
 	 */
-	export function pre(fn: (input: { signal: AbortSignal }) => void | ((input: { signal: AbortSignal }) => void)): void;
+	export function pre(
+		fn: (input: { signal: AbortSignal }) => void | (() => void) | Promise<void>
+	): void;
 
 	/**
 	 * The `$effect.tracking` rune is an advanced feature that tells you whether or not the code is running inside a tracking context, such as an effect or inside your template.
diff --git a/packages/svelte/types/index.d.ts b/packages/svelte/types/index.d.ts
index 80c80a0e07..c3b8a41eb9 100644
--- a/packages/svelte/types/index.d.ts
+++ b/packages/svelte/types/index.d.ts
@@ -2892,7 +2892,9 @@ declare namespace $derived {
  * https://svelte.dev/docs/svelte/$effect
  * @param fn The function to execute
  */
-declare function $effect(fn: (input: { signal: AbortSignal }) => void | ((input: { signal: AbortSignal }) => void)): void;
+declare function $effect(
+	fn: (input: { signal: AbortSignal }) => void | (() => void) | Promise<void>
+): void;
 
 declare namespace $effect {
 	/**
@@ -2911,7 +2913,9 @@ declare namespace $effect {
 	 * https://svelte.dev/docs/svelte/$effect#$effect.pre
 	 * @param fn The function to execute
 	 */
-	export function pre(fn: (input: { signal: AbortSignal }) => void | ((input: { signal: AbortSignal }) => void)): void;
+	export function pre(
+		fn: (input: { signal: AbortSignal }) => void | (() => void) | Promise<void>
+	): void;
 
 	/**
 	 * The `$effect.tracking` rune is an advanced feature that tells you whether or not the code is running inside a tracking context, such as an effect or inside your template.