diff --git a/apps/client/src/app/pages/portfolio/budget/budget-page.component.spec.ts b/apps/client/src/app/pages/portfolio/budget/budget-page.component.spec.ts
index a3a70a0c4..550ead68c 100644
--- a/apps/client/src/app/pages/portfolio/budget/budget-page.component.spec.ts
+++ b/apps/client/src/app/pages/portfolio/budget/budget-page.component.spec.ts
@@ -155,4 +155,15 @@ describe('GfBudgetPageComponent', () => {
     expect(dataService.deleteBudget).toHaveBeenCalledWith('budget-1');
     expect(dataService.fetchBudgets).toHaveBeenCalledTimes(2);
   });
+
+  it('opens the category management dialog', async () => {
+    await fixture.whenStable();
+
+    fixture.componentInstance.onManageCategories();
+    await fixture.whenStable();
+
+    expect(dialog.open).toHaveBeenCalledWith(expect.any(Function), {
+      width: '36rem'
+    });
+  });
 });
diff --git a/apps/client/src/app/pages/portfolio/budget/budget-page.component.ts b/apps/client/src/app/pages/portfolio/budget/budget-page.component.ts
index 6a33c238c..bfb7aa894 100644
--- a/apps/client/src/app/pages/portfolio/budget/budget-page.component.ts
+++ b/apps/client/src/app/pages/portfolio/budget/budget-page.component.ts
@@ -20,6 +20,7 @@ import { MatTableDataSource, MatTableModule } from '@angular/material/table';
 import { format } from 'date-fns';
 
 import { GfCreateOrUpdateBudgetDialogComponent } from './create-or-update-budget-dialog/create-or-update-budget-dialog.component';
+import { GfManageBudgetCategoriesDialogComponent } from './manage-budget-categories-dialog/manage-budget-categories-dialog.component';
 
 @Component({
   host: { class: 'page' },
@@ -122,6 +123,16 @@ export class GfBudgetPageComponent implements OnInit {
       });
   }
 
+  public onManageCategories() {
+    this.dialog
+      .open(GfManageBudgetCategoriesDialogComponent, {
+        width: '36rem'
+      })
+      .afterClosed()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe();
+  }
+
   public onUpdateBudget(budget: BudgetResponse) {
     this.openBudgetDialog({
       budget,
diff --git a/apps/client/src/app/pages/portfolio/budget/budget-page.html b/apps/client/src/app/pages/portfolio/budget/budget-page.html
index 4e303f5b1..84f514b4b 100644
--- a/apps/client/src/app/pages/portfolio/budget/budget-page.html
+++ b/apps/client/src/app/pages/portfolio/budget/budget-page.html
@@ -135,16 +135,26 @@
         </div>
       }
 
-      <button
-        class="mt-3"
-        color="primary"
-        i18n
-        mat-flat-button
-        type="button"
-        (click)="onCreateBudget()"
-      >
-        Create budget
-      </button>
+      <div class="budget-actions mt-3">
+        <button
+          color="primary"
+          i18n
+          mat-flat-button
+          type="button"
+          (click)="onCreateBudget()"
+        >
+          Create budget
+        </button>
+
+        <button
+          i18n
+          mat-stroked-button
+          type="button"
+          (click)="onManageCategories()"
+        >
+          Manage categories
+        </button>
+      </div>
     </div>
   </div>
 </div>
diff --git a/apps/client/src/app/pages/portfolio/budget/budget-page.scss b/apps/client/src/app/pages/portfolio/budget/budget-page.scss
index 25f57162f..469db050c 100644
--- a/apps/client/src/app/pages/portfolio/budget/budget-page.scss
+++ b/apps/client/src/app/pages/portfolio/budget/budget-page.scss
@@ -6,6 +6,12 @@
   max-width: 11rem;
 }
 
+.budget-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+}
+
 .budget-summary {
   display: grid;
   gap: 1rem;
diff --git a/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.spec.ts b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.spec.ts
new file mode 100644
index 000000000..33979fa9c
--- /dev/null
+++ b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.spec.ts
@@ -0,0 +1,164 @@
+import { DataService } from '@ghostfolio/ui/services';
+
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { MatDialogRef } from '@angular/material/dialog';
+import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+import { of } from 'rxjs';
+
+import { GfManageBudgetCategoriesDialogComponent } from './manage-budget-categories-dialog.component';
+
+describe('GfManageBudgetCategoriesDialogComponent', () => {
+  const createdAt = new Date('2026-06-01');
+  const updatedAt = new Date('2026-06-01');
+
+  let component: GfManageBudgetCategoriesDialogComponent;
+  let dataService: jest.Mocked<
+    Pick<
+      DataService,
+      | 'createExpenseCategory'
+      | 'deleteExpenseCategory'
+      | 'fetchExpenseCategories'
+      | 'updateExpenseCategory'
+    >
+  >;
+  let dialogRef: jest.Mocked<
+    Pick<MatDialogRef<GfManageBudgetCategoriesDialogComponent>, 'close'>
+  >;
+  let fixture: ComponentFixture<GfManageBudgetCategoriesDialogComponent>;
+
+  beforeEach(async () => {
+    dataService = {
+      createExpenseCategory: jest.fn().mockReturnValue(
+        of({
+          color: '#0055aa',
+          createdAt,
+          id: 'category-2',
+          name: 'Transport',
+          updatedAt
+        })
+      ),
+      deleteExpenseCategory: jest.fn().mockReturnValue(of(undefined)),
+      fetchExpenseCategories: jest.fn().mockReturnValue(
+        of([
+          {
+            color: '#0055aa',
+            createdAt,
+            id: 'category-1',
+            name: 'Groceries',
+            updatedAt
+          }
+        ])
+      ),
+      updateExpenseCategory: jest.fn().mockReturnValue(
+        of({
+          color: '#aa5500',
+          createdAt,
+          id: 'category-1',
+          name: 'Food',
+          updatedAt
+        })
+      )
+    };
+    dialogRef = {
+      close: jest.fn()
+    };
+
+    await TestBed.configureTestingModule({
+      imports: [GfManageBudgetCategoriesDialogComponent, NoopAnimationsModule],
+      providers: [
+        {
+          provide: DataService,
+          useValue: dataService
+        },
+        {
+          provide: MatDialogRef,
+          useValue: dialogRef
+        }
+      ]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(GfManageBudgetCategoriesDialogComponent);
+    component = fixture.componentInstance;
+    fixture.autoDetectChanges();
+  });
+
+  it('loads expense categories', async () => {
+    await fixture.whenStable();
+
+    expect(dataService.fetchExpenseCategories).toHaveBeenCalled();
+    expect(component.dataSource.data).toEqual([
+      {
+        color: '#0055aa',
+        createdAt,
+        id: 'category-1',
+        name: 'Groceries',
+        updatedAt
+      }
+    ]);
+  });
+
+  it('creates an expense category and reloads categories', async () => {
+    await fixture.whenStable();
+
+    component.categoryForm.setValue({
+      color: '#0055aa',
+      name: 'Transport'
+    });
+
+    component.onSubmit();
+    await fixture.whenStable();
+
+    expect(dataService.createExpenseCategory).toHaveBeenCalledWith({
+      color: '#0055aa',
+      name: 'Transport'
+    });
+    expect(dataService.fetchExpenseCategories).toHaveBeenCalledTimes(2);
+  });
+
+  it('updates an expense category and reloads categories', async () => {
+    await fixture.whenStable();
+
+    component.onEditCategory({
+      color: '#0055aa',
+      createdAt,
+      id: 'category-1',
+      name: 'Groceries',
+      updatedAt
+    });
+    component.categoryForm.setValue({
+      color: '#aa5500',
+      name: 'Food'
+    });
+
+    component.onSubmit();
+    await fixture.whenStable();
+
+    expect(dataService.updateExpenseCategory).toHaveBeenCalledWith({
+      category: {
+        color: '#aa5500',
+        id: 'category-1',
+        name: 'Food'
+      },
+      id: 'category-1'
+    });
+    expect(dataService.fetchExpenseCategories).toHaveBeenCalledTimes(2);
+  });
+
+  it('deletes an expense category and reloads categories', async () => {
+    await fixture.whenStable();
+
+    component.onDeleteCategory('category-1');
+    await fixture.whenStable();
+
+    expect(dataService.deleteExpenseCategory).toHaveBeenCalledWith(
+      'category-1'
+    );
+    expect(dataService.fetchExpenseCategories).toHaveBeenCalledTimes(2);
+  });
+
+  it('closes with a refresh result', () => {
+    component.onClose();
+
+    expect(dialogRef.close).toHaveBeenCalledWith({ refresh: true });
+  });
+});
diff --git a/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.ts b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.ts
new file mode 100644
index 000000000..b00dbe107
--- /dev/null
+++ b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.component.ts
@@ -0,0 +1,150 @@
+import { ExpenseCategoryResponse } from '@ghostfolio/common/interfaces';
+import { DataService } from '@ghostfolio/ui/services';
+
+import { CommonModule } from '@angular/common';
+import {
+  ChangeDetectorRef,
+  Component,
+  DestroyRef,
+  OnInit
+} from '@angular/core';
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
+import {
+  FormControl,
+  FormGroup,
+  ReactiveFormsModule,
+  Validators
+} from '@angular/forms';
+import { MatButtonModule } from '@angular/material/button';
+import { MatDialogModule, MatDialogRef } from '@angular/material/dialog';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatIconModule } from '@angular/material/icon';
+import { MatInputModule } from '@angular/material/input';
+import { MatTableDataSource, MatTableModule } from '@angular/material/table';
+
+@Component({
+  imports: [
+    CommonModule,
+    MatButtonModule,
+    MatDialogModule,
+    MatFormFieldModule,
+    MatIconModule,
+    MatInputModule,
+    MatTableModule,
+    ReactiveFormsModule
+  ],
+  selector: 'gf-manage-budget-categories-dialog',
+  styleUrls: ['./manage-budget-categories-dialog.scss'],
+  templateUrl: './manage-budget-categories-dialog.html'
+})
+export class GfManageBudgetCategoriesDialogComponent implements OnInit {
+  public categoryForm = new FormGroup({
+    color: new FormControl<string>('', {
+      nonNullable: true,
+      validators: [Validators.pattern(/^#[0-9a-fA-F]{6}$/)]
+    }),
+    name: new FormControl<string>('', {
+      nonNullable: true,
+      validators: [Validators.required]
+    })
+  });
+  public dataSource = new MatTableDataSource<ExpenseCategoryResponse>([]);
+  public displayedColumns = ['name', 'color', 'actions'];
+  public editingCategory: ExpenseCategoryResponse | undefined;
+  public isLoading = true;
+
+  public constructor(
+    private changeDetectorRef: ChangeDetectorRef,
+    private dataService: DataService,
+    private destroyRef: DestroyRef,
+    private dialogRef: MatDialogRef<GfManageBudgetCategoriesDialogComponent>
+  ) {}
+
+  public ngOnInit() {
+    this.fetchCategories();
+  }
+
+  public onCancelEdit() {
+    this.editingCategory = undefined;
+    this.categoryForm.reset({
+      color: '',
+      name: ''
+    });
+  }
+
+  public onClose() {
+    this.dialogRef.close({ refresh: true });
+  }
+
+  public onDeleteCategory(id: string) {
+    this.dataService
+      .deleteExpenseCategory(id)
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe(() => {
+        this.fetchCategories();
+      });
+  }
+
+  public onEditCategory(category: ExpenseCategoryResponse) {
+    this.editingCategory = category;
+    this.categoryForm.setValue({
+      color: category.color ?? '',
+      name: category.name
+    });
+  }
+
+  public onSubmit() {
+    if (this.categoryForm.invalid) {
+      this.categoryForm.markAllAsTouched();
+      return;
+    }
+
+    const category = this.toCategoryPayload();
+
+    if (this.editingCategory) {
+      this.dataService
+        .updateExpenseCategory({
+          category: {
+            ...category,
+            id: this.editingCategory.id
+          },
+          id: this.editingCategory.id
+        })
+        .pipe(takeUntilDestroyed(this.destroyRef))
+        .subscribe(() => {
+          this.onCancelEdit();
+          this.fetchCategories();
+        });
+    } else {
+      this.dataService
+        .createExpenseCategory(category)
+        .pipe(takeUntilDestroyed(this.destroyRef))
+        .subscribe(() => {
+          this.onCancelEdit();
+          this.fetchCategories();
+        });
+    }
+  }
+
+  private fetchCategories() {
+    this.isLoading = true;
+
+    this.dataService
+      .fetchExpenseCategories()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe((categories) => {
+        this.dataSource = new MatTableDataSource(categories);
+        this.isLoading = false;
+        this.changeDetectorRef.markForCheck();
+      });
+  }
+
+  private toCategoryPayload() {
+    const { color, name } = this.categoryForm.getRawValue();
+
+    return {
+      color: color || undefined,
+      name
+    };
+  }
+}
diff --git a/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.html b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.html
new file mode 100644
index 000000000..a12f575bc
--- /dev/null
+++ b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.html
@@ -0,0 +1,98 @@
+<h2 i18n mat-dialog-title>Manage categories</h2>
+
+<mat-dialog-content>
+  <form
+    class="category-form"
+    [formGroup]="categoryForm"
+    (ngSubmit)="onSubmit()"
+  >
+    <mat-form-field appearance="outline">
+      <mat-label i18n>Name</mat-label>
+      <input formControlName="name" matInput />
+    </mat-form-field>
+
+    <mat-form-field appearance="outline">
+      <mat-label i18n>Color</mat-label>
+      <input formControlName="color" matInput placeholder="#0055aa" />
+    </mat-form-field>
+
+    <div class="category-form-actions">
+      @if (editingCategory) {
+        <button i18n mat-button type="button" (click)="onCancelEdit()">
+          Cancel edit
+        </button>
+      }
+
+      <button
+        color="primary"
+        i18n
+        mat-flat-button
+        type="submit"
+        [disabled]="categoryForm.invalid"
+      >
+        @if (editingCategory) {
+          Update
+        } @else {
+          Create
+        }
+      </button>
+    </div>
+  </form>
+
+  @if (dataSource.data.length > 0) {
+    <table class="gf-table w-100" mat-table [dataSource]="dataSource">
+      <ng-container matColumnDef="name">
+        <th *matHeaderCellDef i18n mat-header-cell>Name</th>
+        <td *matCellDef="let category" mat-cell>{{ category.name }}</td>
+      </ng-container>
+
+      <ng-container matColumnDef="color">
+        <th *matHeaderCellDef i18n mat-header-cell>Color</th>
+        <td *matCellDef="let category" mat-cell>
+          @if (category.color) {
+            <span class="category-color">
+              <span
+                class="category-color-swatch"
+                [style.background-color]="category.color"
+              ></span>
+              {{ category.color }}
+            </span>
+          }
+        </td>
+      </ng-container>
+
+      <ng-container matColumnDef="actions">
+        <th *matHeaderCellDef class="text-right" mat-header-cell></th>
+        <td *matCellDef="let category" class="text-right" mat-cell>
+          <button
+            mat-icon-button
+            type="button"
+            [attr.aria-label]="'Edit category'"
+            (click)="onEditCategory(category)"
+          >
+            <mat-icon>edit</mat-icon>
+          </button>
+          <button
+            mat-icon-button
+            type="button"
+            [attr.aria-label]="'Delete category'"
+            (click)="onDeleteCategory(category.id)"
+          >
+            <mat-icon>delete</mat-icon>
+          </button>
+        </td>
+      </ng-container>
+
+      <tr *matHeaderRowDef="displayedColumns" mat-header-row></tr>
+      <tr *matRowDef="let row; columns: displayedColumns" mat-row></tr>
+    </table>
+  } @else if (!isLoading) {
+    <div class="py-4 text-center text-muted" i18n>
+      No categories have been created.
+    </div>
+  }
+</mat-dialog-content>
+
+<mat-dialog-actions align="end">
+  <button i18n mat-button type="button" (click)="onClose()">Close</button>
+</mat-dialog-actions>
diff --git a/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.scss b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.scss
new file mode 100644
index 000000000..7b34e313e
--- /dev/null
+++ b/apps/client/src/app/pages/portfolio/budget/manage-budget-categories-dialog/manage-budget-categories-dialog.scss
@@ -0,0 +1,35 @@
+.category-form {
+  display: grid;
+  gap: 1rem;
+  grid-template-columns: minmax(0, 1fr) minmax(0, 10rem) auto;
+}
+
+.category-form-actions {
+  align-items: center;
+  display: flex;
+  gap: 0.5rem;
+  justify-content: flex-end;
+}
+
+.category-color {
+  align-items: center;
+  display: inline-flex;
+  gap: 0.5rem;
+}
+
+.category-color-swatch {
+  border: 1px solid var(--border-color);
+  display: inline-block;
+  height: 1rem;
+  width: 1rem;
+}
+
+@media (max-width: 767.98px) {
+  .category-form {
+    grid-template-columns: 1fr;
+  }
+
+  .category-form-actions {
+    justify-content: flex-start;
+  }
+}