diff --git a/api/app/account/routes.py b/api/app/account/account_routes.py
similarity index 97%
rename from api/app/account/routes.py
rename to api/app/account/account_routes.py
index 371e0a4..c2b86f9 100644
--- a/api/app/account/routes.py
+++ b/api/app/account/account_routes.py
@@ -17,7 +17,7 @@ def create_account(account: AccountCreate, session: SessionDep, current_user=Dep
 
 @router.get("")
 def read_accounts(session: SessionDep, current_user=Depends(get_current_user)) -> Page[AccountRead]:
-    return paginate(session, Account.list())
+    return paginate(session, Account.list_accounts())
 
 @router.get("/{account_id}")
 def read_account(account_id: UUID, session: SessionDep, current_user=Depends(get_current_user)) -> AccountRead:
diff --git a/api/app/account/category_routes.py b/api/app/account/category_routes.py
new file mode 100644
index 0000000..8913fe8
--- /dev/null
+++ b/api/app/account/category_routes.py
@@ -0,0 +1,46 @@
+from uuid import UUID
+
+from fastapi import APIRouter, HTTPException, Depends
+from fastapi_pagination import Page
+from fastapi_pagination.ext.sqlmodel import paginate
+
+from account.models import Account, AccountRead, CategoryCreate, CategoryUpdate
+from db import SessionDep
+from user.manager import get_current_user
+
+router = APIRouter()
+
+@router.post("")
+def create_category(category: CategoryCreate, session: SessionDep, current_user=Depends(get_current_user)) -> AccountRead:
+    result = Account.create(category, session)
+    return result
+
+@router.get("")
+def read_categorys(session: SessionDep, current_user=Depends(get_current_user)) -> Page[AccountRead]:
+    return paginate(session, Account.list_categories())
+
+@router.get("/{category_id}")
+def read_category(category_id: UUID, session: SessionDep, current_user=Depends(get_current_user)) -> AccountRead:
+    category = Account.get(session, category_id)
+    if not category:
+        raise HTTPException(status_code=404, detail="Category not found")
+    return category
+
+@router.put("/{category_id}")
+def update_category(category_id: UUID, category: CategoryUpdate, session: SessionDep, current_user=Depends(get_current_user)) -> AccountRead:
+    db_category = Account.get(session, category_id)
+    if not db_category:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    category_data = category.model_dump(exclude_unset=True)
+    category = Account.update(session, db_category, category_data)
+    return category
+
+@router.delete("/{category_id}")
+def delete_category(category_id: UUID, session: SessionDep, current_user=Depends(get_current_user)):
+    category = Account.get(session, category_id)
+    if not category:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    Account.delete(session, category)
+    return {"ok": True}
diff --git a/api/app/account/models.py b/api/app/account/models.py
index d1cdbc0..46de73f 100644
--- a/api/app/account/models.py
+++ b/api/app/account/models.py
@@ -3,6 +3,61 @@ from enum import Enum
 
 from sqlmodel import Field, SQLModel, select
 
+
+class AccountBase(SQLModel):
+    name: str = Field(index=True)
+    type: str = Field(index=True)
+
+class AccountBaseId(AccountBase):
+    id: UUID | None = Field(default_factory=uuid4, primary_key=True)
+
+class Account(AccountBaseId, table=True):
+
+    @classmethod
+    def create(cls, account, session):
+        account_db = cls.model_validate(account)
+        session.add(account_db)
+        session.commit()
+        session.refresh(account_db)
+
+        return account_db
+
+    @classmethod
+    def list(cls):
+        return select(Account)
+
+    @classmethod
+    def list_accounts(cls):
+        return cls.list().where(
+            Account.type.not_in_([v.value for v in CategoryType])
+        )
+
+    @classmethod
+    def list_categories(cls):
+        return cls.list().where(
+            Account.type.in_([v.value for v in CategoryType])
+        )
+
+    @classmethod
+    def get(cls, session, account_id):
+        return session.get(Account, account_id)
+
+    @classmethod
+    def update(cls, session, account_db, account_data):
+        account_db.sqlmodel_update(account_data)
+        session.add(account_db)
+        session.commit()
+        session.refresh(account_db)
+        return account_db
+
+    @classmethod
+    def delete(cls, session, account):
+        session.delete(account)
+        session.commit()
+
+class AccountRead(AccountBaseId):
+    pass
+
 class AccountType(Enum):
     Asset = "Asset"                # < Denotes a generic asset account.
     Checkings = "Checkings"            # < Standard checking account
@@ -24,53 +79,36 @@ class AccountType(Enum):
     Income = "Income"               # < Denotes an income account
     Expense = "Expense"              # < Denotes an expense account
 
-class AccountBase(SQLModel):
-    name: str = Field(index=True)
-    type: AccountType = Field(index=True)
+class Asset(Enum):
+    Asset = "Asset"
+    Checkings = "Checkings"
+    Savings = "Savings"
+    Cash = "Cash"
 
-class AccountBaseId(AccountBase):
-    id: UUID | None = Field(default_factory=uuid4, primary_key=True)
-
-class Account(AccountBaseId, table=True):
-
-    @classmethod
-    def create(cls, account, session):
-        account_db = cls.model_validate(account)
-        session.add(account_db)
-        session.commit()
-        session.refresh(account_db)
-
-        return account_db
-
-    @classmethod
-    def list(cls):
-        return select(Account)
-
-    @classmethod
-    def get(cls, session, account_id):
-        return session.get(Account, account_id)
-
-    @classmethod
-    def update(cls, session, account_db, account_data):
-        account_db.sqlmodel_update(account_data)
-        session.add(account_db)
-        session.commit()
-        session.refresh(account_db)
-        return account_db
-
-    @classmethod
-    def delete(cls, session, account):
-        session.delete(account)
-        session.commit()
-
-class AccountRead(AccountBaseId):
-    pass
+class Liability(Enum):
+    Liability = "Liability"
+    CreditCard = "CreditCard"
+    Loan = "Loan"
+    Investment = "Investment"
 
 class AccountWrite(AccountBase):
-    pass
+    type: Asset | Liability = Field()
 
 class AccountCreate(AccountWrite):
     pass
 
 class AccountUpdate(AccountWrite):
     pass
+
+class CategoryType(Enum):
+    Income = "Income"
+    Expense = "Expense"
+
+class CategoryWrite(AccountBase):
+    type: CategoryType = Field()
+
+class CategoryCreate(CategoryWrite):
+    pass
+
+class CategoryUpdate(CategoryWrite):
+    pass
\ No newline at end of file
diff --git a/api/app/main.py b/api/app/main.py
index ceb480c..12552be 100644
--- a/api/app/main.py
+++ b/api/app/main.py
@@ -8,7 +8,8 @@ from fastapi_pagination import add_pagination
 
 from db import create_db_and_tables
 from user import user_router, auth_router, create_admin_account
-from account.routes import router as account_router
+from account.account_routes import router as account_router
+from account.category_routes import router as category_router
 from payee.routes import router as payee_router
 from transaction.routes import router as transaction_router
 
@@ -39,6 +40,7 @@ app.add_middleware(
 app.include_router(auth_router, prefix="/auth", tags=["auth"], )
 app.include_router(user_router, prefix="/users", tags=["users"])
 app.include_router(account_router, prefix="/accounts", tags=["accounts"])
+app.include_router(category_router, prefix="/categories", tags=["categories"])
 app.include_router(payee_router, prefix="/payees", tags=["payees"])
 app.include_router(transaction_router, prefix="/transactions", tags=["transactions"])
 
diff --git a/gui/app/src/App.tsx b/gui/app/src/App.tsx
index a378d41..f9ddabf 100644
--- a/gui/app/src/App.tsx
+++ b/gui/app/src/App.tsx
@@ -25,6 +25,7 @@ import { useFormContext } from "react-hook-form";
 
 import { PostList, PostCreate, PostEdit } from "./pages/posts";
 import { AccountList, AccountCreate, AccountEdit } from "./pages/accounts";
+import { CategoryList, CategoryCreate, CategoryEdit } from "./pages/categories";
 import { PayeeCreate, PayeeEdit, PayeeList } from "./pages/payees";
 import { TransactionCreate, TransactionEdit, TransactionList } from "./pages/transactions";
 
@@ -81,6 +82,12 @@ const App: React.FC = () => {
                 edit: "/accounts/edit/:id",
                 create: "/accounts/create",
               },
+              {
+                name: "categories",
+                list: "/categories",
+                edit: "/categories/edit/:id",
+                create: "/categories/create",
+              },
               {
                 name: "payees",
                 list: "/payees",
@@ -129,6 +136,11 @@ const App: React.FC = () => {
                   <Route path="create" element={<AccountCreate />} />
                   <Route path="edit/:id" element={<AccountEdit />} />
                 </Route>
+                <Route path="/categories">
+                  <Route index element={<CategoryList />} />
+                  <Route path="create" element={<CategoryCreate />} />
+                  <Route path="edit/:id" element={<CategoryEdit />} />
+                </Route>
                 <Route path="/payees">
                   <Route index element={<PayeeList />} />
                   <Route path="create" element={<PayeeCreate />} />
diff --git a/gui/app/src/pages/categories/create.tsx b/gui/app/src/pages/categories/create.tsx
new file mode 100644
index 0000000..3fa8346
--- /dev/null
+++ b/gui/app/src/pages/categories/create.tsx
@@ -0,0 +1,12 @@
+import {CrudForm} from "../../common/crud/crud-form";
+import {CategoryEdit} from "./edit";
+
+
+export const CategoryCreate: React.FC = () => {
+  return (
+    <CrudForm
+      schemaName={"CategoryCreate"}
+      resource={"categories"}
+    />
+  );
+};
diff --git a/gui/app/src/pages/categories/edit.tsx b/gui/app/src/pages/categories/edit.tsx
new file mode 100644
index 0000000..831604b
--- /dev/null
+++ b/gui/app/src/pages/categories/edit.tsx
@@ -0,0 +1,15 @@
+import { CrudForm } from "../../common/crud/crud-form";
+import { useParams } from "react-router"
+
+
+export const CategoryEdit: React.FC = () => {
+  const { id } = useParams()
+
+  return (
+    <CrudForm
+      schemaName={"CategoryUpdate"}
+      resource={"categories"}
+      id={id}
+    />
+  );
+};
diff --git a/gui/app/src/pages/categories/index.tsx b/gui/app/src/pages/categories/index.tsx
new file mode 100644
index 0000000..b9af745
--- /dev/null
+++ b/gui/app/src/pages/categories/index.tsx
@@ -0,0 +1,3 @@
+export * from "./list";
+export * from "./create";
+export * from "./edit";
diff --git a/gui/app/src/pages/categories/list.tsx b/gui/app/src/pages/categories/list.tsx
new file mode 100644
index 0000000..f9d4b75
--- /dev/null
+++ b/gui/app/src/pages/categories/list.tsx
@@ -0,0 +1,49 @@
+import {DeleteButton, EditButton, List, useDataGrid} from "@refinedev/mui";
+import React from "react";
+
+import { DataGrid, type GridColDef } from "@mui/x-data-grid";
+
+import type { IAccount } from "../../interfaces";
+import { ButtonGroup } from "@mui/material";
+
+export const CategoryList: React.FC = () => {
+  const { dataGridProps } = useDataGrid<IAccount>();
+
+  const columns = React.useMemo<GridColDef<IAccount>[]>(
+    () => [
+      { field: "id", headerName: "ID" },
+      { field: "name", headerName: "Name", flex: 1 },
+      { field: "type", headerName: "Type", flex: 0.3 },
+      {
+        field: "actions",
+        headerName: "Actions",
+        display: "flex",
+        renderCell: function render({ row }) {
+          return (
+            <ButtonGroup>
+              <EditButton hideText recordItemId={row.id} />
+              <DeleteButton hideText recordItemId={row.id} />
+            </ButtonGroup>
+          );
+        },
+        align: "center",
+        headerAlign: "center",
+      },
+    ],
+    [],
+  );
+
+  return (
+    <List>
+      <div
+        style={{
+          display: "flex",
+          flexDirection: "column",
+          maxHeight: "calc(100vh - 320px)",
+        }}
+      >
+        <DataGrid {...dataGridProps} columns={columns} />
+      </div>
+    </List>
+  );
+};
diff --git a/gui/app/src/providers/data-provider.tsx b/gui/app/src/providers/data-provider.tsx
index ea5d133..c210512 100644
--- a/gui/app/src/providers/data-provider.tsx
+++ b/gui/app/src/providers/data-provider.tsx
@@ -1,6 +1,5 @@
 import type { DataProvider } from "@refinedev/core";
 
-//const API_URL = "https://api.fake-rest.refine.dev";
 const API_URL = "http://localhost:8000";
 
 const fetcher = async (url: string, options?: RequestInit) => {
diff --git a/gui/app/src/providers/jsonschema-provider.tsx b/gui/app/src/providers/jsonschema-provider.tsx
index bccecd2..24ff396 100644
--- a/gui/app/src/providers/jsonschema-provider.tsx
+++ b/gui/app/src/providers/jsonschema-provider.tsx
@@ -31,8 +31,9 @@ function buildResource(rawSchemas: RJSFSchema, resourceName: string) {
     if (is_reference(prop)) {
       resolveReference(rawSchemas, resource, prop);
     } else if (is_union(prop)) {
-      for (let i in prop.oneOf) {
-        resolveReference(rawSchemas, resource, prop.oneOf[i]);
+      const union = prop.hasOwnProperty("oneOf") ? prop.oneOf : prop.anyOf;
+      for (let i in union) {
+        resolveReference(rawSchemas, resource, union[i]);
       }
     } else if (is_enum(prop)) {
       for (let i in prop.allOf) {
@@ -92,11 +93,11 @@ function is_array(prop: any) {
 }
 
 function is_union(prop: any) {
-  return prop.hasOwnProperty('oneOf');
+  return prop.hasOwnProperty('oneOf') || prop.hasOwnProperty('anyOf');
 }
 
 function is_enum(prop: any) {
-  return prop.hasOwnProperty('allOf');
+  return prop.hasOwnProperty('enum');
 }
 
 function get_reference_name(prop: any) {
@@ -112,7 +113,8 @@ function has_descendant(rawSchemas:RJSFSchema, resource: RJSFSchema, property_na
     let subresourceName = get_reference_name(resource);
     return has_descendant(rawSchemas, buildResource(rawSchemas, subresourceName), property_name);
   } else if (is_union(resource)) {
-    for (const ref of resource.oneOf!) {
+    const union = resource.hasOwnProperty("oneOf") ? resource.oneOf : resource.anyOf;
+    for (const ref of union) {
       return has_descendant(rawSchemas, ref, property_name)
     }
   } else if (is_enum(resource)) {
@@ -183,4 +185,3 @@ function get_property_by_path(rawSchemas: RJSFSchema, resource: RJSFSchema, path
     path.substring(pointFirstPosition + 1)
   );
 }
-