diff --git a/app/schemas/tag.py b/app/schemas/tag.py
new file mode 100644
index 0000000..63d4cd9
--- /dev/null
+++ b/app/schemas/tag.py
@@ -0,0 +1,57 @@
+"""Pydantic schemas for Tag and TagLink endpoints."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.models.tag_link import TagLinkParentType
+
+
+class TagCreate(BaseModel):
+    """Body for POST /api/v1/tags/."""
+
+    name: str = Field(..., min_length=1, max_length=64)
+    color: str = Field(default="#3B82F6", pattern=r"^#[0-9A-Fa-f]{6}$")
+
+
+class TagOut(BaseModel):
+    """Response schema for a tag."""
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    org_id: int
+    name: str
+    color: str
+    created_at: datetime
+    updated_at: datetime
+    deleted_at: Optional[datetime] = None
+
+
+class TagLinkCreate(BaseModel):
+    """Body for POST /api/v1/tags/link."""
+
+    tag_id: int = Field(..., ge=1)
+    parent_type: TagLinkParentType
+    parent_id: int = Field(..., ge=1)
+
+
+class TagLinkOut(BaseModel):
+    """Response schema for a tag link."""
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    org_id: int
+    tag_id: int
+    parent_type: TagLinkParentType
+    parent_id: int
+    created_at: datetime
+    updated_at: datetime
+    deleted_at: Optional[datetime] = None
+
+
+__all__ = ["TagCreate", "TagLinkCreate", "TagLinkOut", "TagOut"]