diff --git a/src/main/java/com/example/demo/app/domain/model/FixedCostModel.java b/src/main/java/com/example/demo/app/domain/model/FixedCostModel.java
new file mode 100644
index 0000000..45d57be
--- /dev/null
+++ b/src/main/java/com/example/demo/app/domain/model/FixedCostModel.java
@@ -0,0 +1,49 @@
+package com.example.demo.app.domain.model;
+
+import java.util.List;
+
+import com.example.demo.app.infra.entity.CategoryEntity;
+import com.example.demo.app.infra.entity.FixedCostEntity;
+import com.example.demo.app.infra.entity.UserEntity;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class FixedCostModel {
+
+	private Long fixedCostId;
+
+	private Long userId;
+
+	private Long categoryId;
+	
+	private String fixedCostName;
+
+	private Integer amount;
+	
+	
+	public static FixedCostModel convertFrom(FixedCostEntity fixedCostEntity) {
+		return new FixedCostModel(
+				fixedCostEntity.getFixedCostId(),
+				fixedCostEntity.getUserEntity().getUserId(),
+				fixedCostEntity.getCategoryEntity().getCategoryId(),
+				fixedCostEntity.getFixedCostName(),
+				fixedCostEntity.getAmount());
+	}
+
+	public static List<FixedCostModel> convertFrom(List<FixedCostEntity> fixedCostEntityList) {
+		return fixedCostEntityList.stream().map(FixedCostModel::convertFrom).toList();
+	}
+	
+	public static FixedCostEntity convertTo(FixedCostModel fixedCostModel, UserEntity userEntity, CategoryEntity categoryEntity) {
+		return new FixedCostEntity(
+				fixedCostModel.getFixedCostId(),
+				userEntity,
+				categoryEntity,
+				fixedCostModel.getFixedCostName(),
+				fixedCostModel.getAmount());
+	}
+	
+}
diff --git a/src/main/java/com/example/demo/app/infra/entity/FixedCostEntity.java b/src/main/java/com/example/demo/app/infra/entity/FixedCostEntity.java
new file mode 100644
index 0000000..ef131b2
--- /dev/null
+++ b/src/main/java/com/example/demo/app/infra/entity/FixedCostEntity.java
@@ -0,0 +1,42 @@
+package com.example.demo.app.infra.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "fixed_cost_t")
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class FixedCostEntity {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	@Column(name = "fixed_cost_id")
+	private Long fixedCostId;
+
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "user_id")
+	private UserEntity userEntity;
+
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "category_id")
+	private CategoryEntity categoryEntity;
+	
+	@Column(name = "fixed_cost_name", nullable = false)
+	private String fixedCostName;
+
+	@Column(name = "amount", nullable = false)
+	private Integer amount;
+}
diff --git a/src/main/java/com/example/demo/app/presentation/form/FixedCostForm.java b/src/main/java/com/example/demo/app/presentation/form/FixedCostForm.java
new file mode 100644
index 0000000..8c12754
--- /dev/null
+++ b/src/main/java/com/example/demo/app/presentation/form/FixedCostForm.java
@@ -0,0 +1,55 @@
+package com.example.demo.app.presentation.form;
+
+import java.util.List;
+
+import com.example.demo.app.domain.model.FixedCostModel;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class FixedCostForm {
+
+	private Long fixedCostId;
+
+	private Long userId;
+
+	private Long categoryId;
+	
+	private String fixedCostName;
+
+	private Integer amount;
+	
+	private String categoryName;
+	
+	
+	public static FixedCostForm convertFrom(FixedCostModel fixedCostModel) {
+		return new FixedCostForm(
+				fixedCostModel.getFixedCostId(),
+				fixedCostModel.getUserId(),
+				fixedCostModel.getCategoryId(),
+				fixedCostModel.getFixedCostName(),
+				fixedCostModel.getAmount(),
+				"");
+	}
+
+
+	public static List<FixedCostForm> convertFrom(List<FixedCostModel> fixedCostModelList) {
+		return fixedCostModelList.stream().map(fixedCostModel -> FixedCostForm.convertFrom(fixedCostModel)).toList();
+	}
+
+	public static FixedCostModel convertTo(FixedCostForm fixedCostForm) {
+		return new FixedCostModel(
+				fixedCostForm.getFixedCostId(),
+				fixedCostForm.getUserId(),
+				fixedCostForm.getCategoryId(),
+				fixedCostForm.getFixedCostName(),
+				fixedCostForm.getAmount());
+	}
+	
+	
+	
+}