diff --git a/src/admin/components/forms/RenderFields/index.tsx b/src/admin/components/forms/RenderFields/index.tsx
index ca0c2ba01f..b817b4e04e 100644
--- a/src/admin/components/forms/RenderFields/index.tsx
+++ b/src/admin/components/forms/RenderFields/index.tsx
@@ -13,7 +13,7 @@ const RenderedFieldContext = createContext({});
 
 export const useRenderedFields = () => useContext(RenderedFieldContext);
 
-const RenderFields = (props) => {
+const RenderFields: React.FC = (props) => {
   const {
     fieldSchema,
     fieldTypes,
diff --git a/src/admin/hooks/useDebounce.tsx b/src/admin/hooks/useDebounce.tsx
index 51a1d0306d..d4ffae61f0 100644
--- a/src/admin/hooks/useDebounce.tsx
+++ b/src/admin/hooks/useDebounce.tsx
@@ -1,7 +1,7 @@
 import { useState, useEffect } from 'react';
 
 // Our hook
-export default function useDebounce(value, delay) {
+export default function useDebounce(value: unknown, delay: number): unknown {
   // State and setters for debounced value
   const [debouncedValue, setDebouncedValue] = useState(value);
 
diff --git a/src/admin/hooks/useIntersect.tsx b/src/admin/hooks/useIntersect.tsx
index b3ae43460c..c38cbe210d 100644
--- a/src/admin/hooks/useIntersect.tsx
+++ b/src/admin/hooks/useIntersect.tsx
@@ -1,8 +1,17 @@
 /* eslint-disable no-shadow */
 import { useEffect, useRef, useState } from 'react';
 
-export default ({ root = null, rootMargin, threshold = 0 } = {}) => {
-  const [entry, updateEntry] = useState({});
+type Intersect = [
+  setNode: React.Dispatch<Element>,
+  entry: IntersectionObserverEntry
+]
+
+const useIntersect = ({
+  root = null,
+  rootMargin = '0px',
+  threshold = 0,
+} = {}): Intersect => {
+  const [entry, updateEntry] = useState<IntersectionObserverEntry>();
   const [node, setNode] = useState(null);
 
   const observer = useRef(
@@ -27,3 +36,5 @@ export default ({ root = null, rootMargin, threshold = 0 } = {}) => {
 
   return [setNode, entry];
 };
+
+export default useIntersect;
diff --git a/src/admin/hooks/useMountEffect.tsx b/src/admin/hooks/useMountEffect.tsx
index 655f74b59f..f6ac8434ae 100644
--- a/src/admin/hooks/useMountEffect.tsx
+++ b/src/admin/hooks/useMountEffect.tsx
@@ -1,5 +1,5 @@
 import { useEffect } from 'react';
 
-const useMountEffect = func => useEffect(func, []);
+const useMountEffect = (func: () => void): void => useEffect(func, []);
 
 export default useMountEffect;
diff --git a/src/admin/hooks/usePayloadAPI.tsx b/src/admin/hooks/usePayloadAPI.tsx
index 60f6204bdb..6343028681 100644
--- a/src/admin/hooks/usePayloadAPI.tsx
+++ b/src/admin/hooks/usePayloadAPI.tsx
@@ -3,11 +3,28 @@ import queryString from 'qs';
 import { useLocale } from '../components/utilities/Locale';
 import { requests } from '../api';
 
-const usePayloadAPI = (url, options = {}) => {
+type Result = [
+  {
+    isLoading: boolean
+    isError: boolean
+    data: unknown
+  },
+  {
+    setParams: React.Dispatch<unknown>
+  }
+]
+
+type Options = {
+  initialParams?: unknown
+  initialData?: unknown
+}
+
+type UsePayloadAPI = (url: string, options?: Options) => Result;
+
+const usePayloadAPI: UsePayloadAPI = (url, options = {}) => {
   const {
     initialParams = {},
     initialData = {},
-    onLoad,
   } = options;
 
   const [data, setData] = useState(initialData);
@@ -18,8 +35,8 @@ const usePayloadAPI = (url, options = {}) => {
 
   const search = queryString.stringify({
     locale,
-    ...params,
-  }, { depth: 10 });
+    ...(typeof params === 'object' ? params : {}),
+  });
 
   useEffect(() => {
     const fetchData = async () => {
@@ -48,7 +65,7 @@ const usePayloadAPI = (url, options = {}) => {
       setIsError(false);
       setIsLoading(false);
     }
-  }, [url, locale, search, onLoad]);
+  }, [url, locale, search]);
 
   return [{ data, isLoading, isError }, { setParams }];
 };
diff --git a/src/admin/hooks/useThrottledEffect.tsx b/src/admin/hooks/useThrottledEffect.tsx
index 440988eac4..79d1125b7e 100644
--- a/src/admin/hooks/useThrottledEffect.tsx
+++ b/src/admin/hooks/useThrottledEffect.tsx
@@ -1,7 +1,9 @@
 /* eslint-disable react-hooks/exhaustive-deps */
 import { useEffect, useRef } from 'react';
 
-const useThrottledEffect = (callback, delay, deps = []) => {
+type useThrottledEffect = (callback: React.EffectCallback, delay: number, deps: React.DependencyList) => void;
+
+const useThrottledEffect: useThrottledEffect = (callback, delay, deps = []) => {
   const lastRan = useRef(Date.now());
 
   useEffect(
diff --git a/src/admin/hooks/useTitle.tsx b/src/admin/hooks/useTitle.tsx
index 6d29cc327e..4863e9460c 100644
--- a/src/admin/hooks/useTitle.tsx
+++ b/src/admin/hooks/useTitle.tsx
@@ -1,6 +1,6 @@
 import { useFormFields } from '../components/forms/Form/context';
 
-const useTitle = (useAsTitle) => {
+const useTitle = (useAsTitle: string): string => {
   const { getField } = useFormFields();
   const titleField = getField(useAsTitle);
   return titleField?.value;
diff --git a/src/admin/hooks/useUnmountEffect.tsx b/src/admin/hooks/useUnmountEffect.tsx
index 5ae99d6902..597bbd49f4 100644
--- a/src/admin/hooks/useUnmountEffect.tsx
+++ b/src/admin/hooks/useUnmountEffect.tsx
@@ -1,6 +1,6 @@
 import { useEffect } from 'react';
 
 // eslint-disable-next-line react-hooks/exhaustive-deps
-const useUnmountEffect = (callback) => useEffect(() => callback, []);
+const useUnmountEffect = (callback: React.EffectCallback): void => useEffect(() => callback, []);
 
 export default useUnmountEffect;