diff --git a/back/Contracts/DTOs/SpendingGroupDto.cs b/back/Contracts/DTOs/SpendingGroupDto.cs
new file mode 100644
index 0000000..cf03704
--- /dev/null
+++ b/back/Contracts/DTOs/SpendingGroupDto.cs
@@ -0,0 +1,8 @@
+namespace Contracts.DTO;
+
+public class SpendingGroupDto
+{
+    public Guid Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public Guid UserId { get; set; }
+}
\ No newline at end of file
diff --git a/back/Contracts/Mappers/SpendingGroupMapper.cs b/back/Contracts/Mappers/SpendingGroupMapper.cs
new file mode 100644
index 0000000..7eca2d3
--- /dev/null
+++ b/back/Contracts/Mappers/SpendingGroupMapper.cs
@@ -0,0 +1,14 @@
+using Contracts.DTO;
+using Contracts.ViewModels;
+
+namespace Contracts.Mappers;
+
+public static class SpendingGroupMapper
+{
+    public static SpendingGroupViewModel ToView(this SpendingGroupDto spendingGroup) 
+        => new() 
+        { 
+            Id = spendingGroup.Id, 
+            Name = spendingGroup.Name
+        };
+}
\ No newline at end of file
diff --git a/back/Contracts/Repositories/ISpendingGroupRepo.cs b/back/Contracts/Repositories/ISpendingGroupRepo.cs
new file mode 100644
index 0000000..f8f7999
--- /dev/null
+++ b/back/Contracts/Repositories/ISpendingGroupRepo.cs
@@ -0,0 +1,13 @@
+using Contracts.DTO;
+using Contracts.SearchModels;
+
+namespace Contracts.Repositories;
+
+public interface ISpendingGroupRepo
+{
+    Task<SpendingGroupDto?> Get(SpendingGroupSearch search);
+    Task<IEnumerable<SpendingGroupDto>> GetList(SpendingGroupSearch? search = null);
+    Task<SpendingGroupDto> Create(SpendingGroupDto spendingGroup);
+    Task<SpendingGroupDto?> Delete(SpendingGroupSearch search);
+    Task<SpendingGroupDto?> Update(SpendingGroupDto spendingGroup);
+}
diff --git a/back/Contracts/SearchModels/SpendingGroupSearch.cs b/back/Contracts/SearchModels/SpendingGroupSearch.cs
new file mode 100644
index 0000000..927a206
--- /dev/null
+++ b/back/Contracts/SearchModels/SpendingGroupSearch.cs
@@ -0,0 +1,7 @@
+namespace Contracts.SearchModels;
+
+public class SpendingGroupSearch
+{
+    public Guid? Id { get; set; }
+    public string? Name { get; set; }
+}
\ No newline at end of file
diff --git a/back/Contracts/Services/ISpendingGroupService.cs b/back/Contracts/Services/ISpendingGroupService.cs
new file mode 100644
index 0000000..e6664ee
--- /dev/null
+++ b/back/Contracts/Services/ISpendingGroupService.cs
@@ -0,0 +1,14 @@
+using Contracts.DTO;
+using Contracts.SearchModels;
+using Contracts.ViewModels;
+
+namespace Contracts.Services;
+
+public interface ISpendingGroupService
+{
+    Task<SpendingGroupViewModel> GetDetails(SpendingGroupSearch search);
+    Task<IEnumerable<SpendingGroupViewModel>> GetList(SpendingGroupSearch search);
+    Task<SpendingGroupViewModel> Create(SpendingGroupDto model);
+    Task<SpendingGroupViewModel> Update(SpendingGroupDto model);
+    Task<SpendingGroupViewModel> Delete(SpendingGroupSearch search);
+}
\ No newline at end of file
diff --git a/back/Contracts/ViewModels/SpendingGroupViewModel.cs b/back/Contracts/ViewModels/SpendingGroupViewModel.cs
new file mode 100644
index 0000000..12cba2d
--- /dev/null
+++ b/back/Contracts/ViewModels/SpendingGroupViewModel.cs
@@ -0,0 +1,7 @@
+namespace Contracts.ViewModels;
+
+public class SpendingGroupViewModel
+{
+    public Guid Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+}
\ No newline at end of file