diff --git a/app/schemas/account.py b/app/schemas/account.py
new file mode 100644
index 0000000..f4f0d21
--- /dev/null
+++ b/app/schemas/account.py
@@ -0,0 +1,59 @@
+"""Pydantic schemas for Account endpoints."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from decimal import Decimal
+from typing import Any, Optional
+
+from pydantic import BaseModel, ConfigDict, Field
+
+from app.models.account import AccountSize, Industry
+
+
+class AccountBase(BaseModel):
+    """Shared fields for create/update."""
+
+    name: str = Field(..., min_length=1, max_length=255)
+    website: Optional[str] = Field(None, max_length=512)
+    industry: Optional[Industry] = None
+    size: Optional[AccountSize] = None
+    address: Optional[dict[str, Any]] = None
+
+
+class AccountCreate(AccountBase):
+    """Request body for POST /api/v1/accounts/."""
+
+    pass
+
+
+class AccountUpdate(BaseModel):
+    """Request body for PATCH /api/v1/accounts/{id}. All optional."""
+
+    name: Optional[str] = Field(None, min_length=1, max_length=255)
+    website: Optional[str] = Field(None, max_length=512)
+    industry: Optional[Industry] = None
+    size: Optional[AccountSize] = None
+    address: Optional[dict[str, Any]] = None
+
+
+class AccountOut(AccountBase):
+    """Response schema for an account."""
+
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    org_id: int
+    owner_id: int
+    created_at: datetime
+    updated_at: datetime
+    deleted_at: Optional[datetime] = None
+
+
+class AccountListItem(AccountOut):
+    """Slim schema for list responses."""
+
+    pass
+
+
+__all__ = ["AccountCreate", "AccountListItem", "AccountOut", "AccountUpdate"]