diff --git a/backend/app/models/contract.py b/backend/app/models/contract.py
new file mode 100644
index 0000000..19a3564
--- /dev/null
+++ b/backend/app/models/contract.py
@@ -0,0 +1,42 @@
+from datetime import datetime, timezone
+from sqlalchemy import String, DateTime, Integer, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.core.database import Base
+
+
+class Contract(Base):
+    __tablename__ = "contracts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    contract_number: Mapped[str] = mapped_column(String(50), nullable=False)
+    year: Mapped[int] = mapped_column(Integer, nullable=False)
+    company: Mapped[str] = mapped_column(String(100), nullable=False)
+    area: Mapped[str | None] = mapped_column(String(100))
+    plate: Mapped[str | None] = mapped_column(String(10))
+    customer_name: Mapped[str | None] = mapped_column(String(200))
+    import_batch: Mapped[str | None] = mapped_column(String(100))
+    imported_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    valuation_contracts: Mapped[list["ValuationContract"]] = relationship(
+        "ValuationContract", back_populates="contract"
+    )
+
+
+class ValuationContract(Base):
+    __tablename__ = "valuation_contracts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    valuation_id: Mapped[int] = mapped_column(Integer, ForeignKey("valuations.id"), nullable=False)
+    contract_id: Mapped[int] = mapped_column(Integer, ForeignKey("contracts.id"), nullable=False)
+    linked_by: Mapped[int] = mapped_column(Integer, ForeignKey("users.id"), nullable=False)
+    linked_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    valuation: Mapped["Valuation"] = relationship("Valuation", back_populates="contracts")
+    contract: Mapped["Contract"] = relationship("Contract", back_populates="valuation_contracts")
+
+
+from app.models.valuation import Valuation
diff --git a/backend/app/models/stock.py b/backend/app/models/stock.py
new file mode 100644
index 0000000..84e7f65
--- /dev/null
+++ b/backend/app/models/stock.py
@@ -0,0 +1,50 @@
+from datetime import datetime, timezone
+from decimal import Decimal
+from sqlalchemy import String, DateTime, DECIMAL, Integer, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column
+from app.core.database import Base
+
+
+class VehicleStock(Base):
+    __tablename__ = "vehicle_stock"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    plate: Mapped[str] = mapped_column(String(10), nullable=False, index=True)
+    brand: Mapped[str | None] = mapped_column(String(50))
+    model: Mapped[str | None] = mapped_column(String(100))
+    version: Mapped[str | None] = mapped_column(String(200))
+    registration_date: Mapped[str | None] = mapped_column(String(20))
+    mileage: Mapped[int | None] = mapped_column(Integer)
+    location: Mapped[str | None] = mapped_column(String(100))
+    import_batch: Mapped[str | None] = mapped_column(String(100))
+    imported_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+
+class RepairCostAvg(Base):
+    __tablename__ = "repair_costs_avg"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    model: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
+    avg_cost: Mapped[Decimal | None] = mapped_column(DECIMAL(10, 2))
+    import_batch: Mapped[str | None] = mapped_column(String(100))
+    imported_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+
+class VehicleSalesAvg(Base):
+    __tablename__ = "vehicle_sales_avg"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    model: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
+    avg_stock_days: Mapped[Decimal | None] = mapped_column(DECIMAL(6, 1))
+    avg_repair_cost: Mapped[Decimal | None] = mapped_column(DECIMAL(10, 2))
+    avg_margin_eur: Mapped[Decimal | None] = mapped_column(DECIMAL(10, 2))
+    avg_margin_pct: Mapped[Decimal | None] = mapped_column(DECIMAL(5, 2))
+    avg_sale_price: Mapped[Decimal | None] = mapped_column(DECIMAL(10, 2))
+    import_batch: Mapped[str | None] = mapped_column(String(100))
+    imported_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )