diff --git a/core/scheduler/service/job_run_service.go b/core/scheduler/service/job_run_service.go
index 8822adb65d..ab138da164 100644
--- a/core/scheduler/service/job_run_service.go
+++ b/core/scheduler/service/job_run_service.go
@@ -17,6 +17,7 @@ import (
 	"github.com/goto/optimus/core/tenant"
 	"github.com/goto/optimus/internal/errors"
 	"github.com/goto/optimus/internal/lib/cron"
+	"github.com/goto/optimus/internal/lib/duration"
 	"github.com/goto/optimus/internal/lib/interval"
 	"github.com/goto/optimus/internal/lib/window"
 	"github.com/goto/optimus/internal/models"
@@ -197,7 +198,9 @@ func (s *JobRunService) GetInterval(ctx context.Context, projectName tenant.Proj
 
 // TODO: this method is only for backward compatibility, it will be deprecated soon
 func (s *JobRunService) getInterval(project *tenant.Project, job *scheduler.JobWithDetails, referenceTime time.Time) (interval.Interval, error) {
-	if job.Job.WindowConfig.Type() == window.Incremental {
+	windowConfig := job.Job.WindowConfig
+
+	if windowConfig.Type() == window.Incremental {
 		w, err := window.FromSchedule(job.Schedule.Interval)
 		if err != nil {
 			s.l.Error("error getting window with type incremental: %v", err)
@@ -207,21 +210,31 @@ func (s *JobRunService) getInterval(project *tenant.Project, job *scheduler.JobW
 		return w.GetInterval(referenceTime)
 	}
 
-	if job.Job.WindowConfig.Type() == window.Preset {
-		preset, err := project.GetPreset(job.Job.WindowConfig.Preset)
-		if err != nil {
-			s.l.Error("error getting preset [%s] for project [%s]: %v", job.Job.WindowConfig.Preset, project.Name(), err)
-			return interval.Interval{}, err
+	if windowConfig.Type() == window.Preset || windowConfig.GetVersion() == window.NewWindowVersion {
+		var config window.SimpleConfig
+		if windowConfig.Type() == window.Preset {
+			preset, err := project.GetPreset(windowConfig.Preset)
+			if err != nil {
+				s.l.Error("error getting preset [%s] for project [%s]: %v", windowConfig.Preset, project.Name(), err)
+				return interval.Interval{}, err
+			}
+
+			config = preset.Config()
+		} else {
+			config = windowConfig.GetSimpleConfig()
 		}
-		cw, err := window.FromCustomConfig(preset.Config())
+
+		config.Delay = ""
+		config.TruncateTo = string(duration.None)
+
+		cw, err := window.FromCustomConfig(config)
 		if err != nil {
 			return interval.Interval{}, err
 		}
 		return cw.GetInterval(referenceTime)
 	}
 
-	baseWindow := job.Job.WindowConfig.Window
-	w, err := models.NewWindow(baseWindow.GetVersion(), "", "0", baseWindow.GetSize())
+	w, err := models.NewWindow(windowConfig.GetVersion(), "", "0", windowConfig.GetSize())
 	if err != nil {
 		s.l.Error("error initializing window: %v", err)
 		return interval.Interval{}, err
diff --git a/core/scheduler/service/job_run_service_test.go b/core/scheduler/service/job_run_service_test.go
index 58a665c9ae..5d395d4261 100644
--- a/core/scheduler/service/job_run_service_test.go
+++ b/core/scheduler/service/job_run_service_test.go
@@ -1398,6 +1398,41 @@ func TestJobRunService(t *testing.T) {
 			assert.ErrorContains(t, actualError, "unexpected error")
 		})
 
+		t.Run("returns interval and nil if custom window v3 is used", func(t *testing.T) {
+			projectGetter := new(mockProjectGetter)
+			defer projectGetter.AssertExpectations(t)
+
+			jobRepo := new(JobRepository)
+			defer jobRepo.AssertExpectations(t)
+
+			projectGetter.On("Get", ctx, projName).Return(project, nil)
+
+			windowConfig, err := window.NewConfig(preset.Config().Size, preset.Config().Delay, preset.Config().Location, preset.Config().TruncateTo)
+			assert.NotNil(t, windowConfig)
+			assert.NoError(t, err)
+
+			job := &scheduler.JobWithDetails{
+				Name: jobName,
+				Schedule: &scheduler.Schedule{
+					Interval: "0 * * * *",
+				},
+				Job: &scheduler.Job{
+					WindowConfig: windowConfig,
+				},
+				JobMetadata: &scheduler.JobMetadata{
+					Version: window.NewWindowVersion,
+				},
+			}
+
+			jobRepo.On("GetJobDetails", ctx, projName, jobName).Return(job, nil)
+			service := service.NewJobRunService(logger, jobRepo, nil, nil, nil, nil, nil, nil, nil, projectGetter)
+
+			actualInterval, actualError := service.GetInterval(ctx, projName, jobName, referenceTime)
+
+			assert.NotZero(t, actualInterval)
+			assert.NoError(t, actualError)
+		})
+
 		t.Run("returns interval and nil if no error is encountered", func(t *testing.T) {
 			projectGetter := new(mockProjectGetter)
 			defer projectGetter.AssertExpectations(t)