diff --git a/models/filters.go b/models/filters.go
index a2ca2c3..7e5efaf 100644
--- a/models/filters.go
+++ b/models/filters.go
@@ -104,7 +104,6 @@ func (f *Filters) Hash() string {
 }
 
 func (f *Filters) Match(h *Heartbeat) bool {
-	// TODO: labels?
 	return (f.Project == nil || f.Project.MatchAny(h.Project)) &&
 		(f.OS == nil || f.OS.MatchAny(h.OperatingSystem)) &&
 		(f.Language == nil || f.Language.MatchAny(h.Language)) &&
@@ -113,12 +112,12 @@ func (f *Filters) Match(h *Heartbeat) bool {
 }
 
 // WithAliases adds OR-conditions for every alias of a filter key as additional filter keys
-func (f *Filters) WithAliases(resolver AliasReverseResolver) *Filters {
+func (f *Filters) WithAliases(resolve AliasReverseResolver) *Filters {
 	if f.Project != nil {
 		updated := OrFilter(make([]string, 0, len(f.Project)))
 		for _, e := range f.Project {
 			updated = append(updated, e)
-			updated = append(updated, resolver(SummaryProject, e)...)
+			updated = append(updated, resolve(SummaryProject, e)...)
 		}
 		f.Project = updated
 	}
@@ -126,7 +125,7 @@ func (f *Filters) WithAliases(resolver AliasReverseResolver) *Filters {
 		updated := OrFilter(make([]string, 0, len(f.OS)))
 		for _, e := range f.OS {
 			updated = append(updated, e)
-			updated = append(updated, resolver(SummaryOS, e)...)
+			updated = append(updated, resolve(SummaryOS, e)...)
 		}
 		f.OS = updated
 	}
@@ -134,7 +133,7 @@ func (f *Filters) WithAliases(resolver AliasReverseResolver) *Filters {
 		updated := OrFilter(make([]string, 0, len(f.Language)))
 		for _, e := range f.Language {
 			updated = append(updated, e)
-			updated = append(updated, resolver(SummaryLanguage, e)...)
+			updated = append(updated, resolve(SummaryLanguage, e)...)
 		}
 		f.Language = updated
 	}
@@ -142,7 +141,7 @@ func (f *Filters) WithAliases(resolver AliasReverseResolver) *Filters {
 		updated := OrFilter(make([]string, 0, len(f.Editor)))
 		for _, e := range f.Editor {
 			updated = append(updated, e)
-			updated = append(updated, resolver(SummaryEditor, e)...)
+			updated = append(updated, resolve(SummaryEditor, e)...)
 		}
 		f.Editor = updated
 	}
@@ -150,9 +149,19 @@ func (f *Filters) WithAliases(resolver AliasReverseResolver) *Filters {
 		updated := OrFilter(make([]string, 0, len(f.Machine)))
 		for _, e := range f.Machine {
 			updated = append(updated, e)
-			updated = append(updated, resolver(SummaryMachine, e)...)
+			updated = append(updated, resolve(SummaryMachine, e)...)
 		}
 		f.Machine = updated
 	}
 	return f
 }
+
+func (f *Filters) WithProjectLabels(resolve ProjectLabelReverseResolver) *Filters {
+	if f.Label == nil || !f.Label.Exists() {
+		return f
+	}
+	for _, l := range f.Label {
+		f.Project = append(f.Project, resolve(l)...)
+	}
+	return f
+}
diff --git a/models/project_label.go b/models/project_label.go
index e344766..d143e50 100644
--- a/models/project_label.go
+++ b/models/project_label.go
@@ -1,5 +1,8 @@
 package models
 
+// ProjectLabelReverseResolver returns all projects for a given label
+type ProjectLabelReverseResolver func(l string) []string
+
 type ProjectLabel struct {
 	ID         uint   `json:"id" gorm:"primary_key"`
 	User       *User  `json:"-" gorm:"not null; constraint:OnUpdate:CASCADE,OnDelete:CASCADE"`
diff --git a/services/project_label.go b/services/project_label.go
index b2ac19b..7581688 100644
--- a/services/project_label.go
+++ b/services/project_label.go
@@ -43,6 +43,7 @@ func (srv *ProjectLabelService) GetByUser(userId string) ([]*models.ProjectLabel
 	return labels, nil
 }
 
+// GetByUserGrouped returns lists of project labels, grouped by their project key
 func (srv *ProjectLabelService) GetByUserGrouped(userId string) (map[string][]*models.ProjectLabel, error) {
 	labelsByProject := make(map[string][]*models.ProjectLabel)
 	userLabels, err := srv.GetByUser(userId)
@@ -60,6 +61,7 @@ func (srv *ProjectLabelService) GetByUserGrouped(userId string) (map[string][]*m
 	return labelsByProject, nil
 }
 
+// GetByUserGroupedInverted returns lists of project labels, grouped by their label key
 func (srv *ProjectLabelService) GetByUserGroupedInverted(userId string) (map[string][]*models.ProjectLabel, error) {
 	projectsByLabel := make(map[string][]*models.ProjectLabel)
 	userLabels, err := srv.GetByUser(userId)
diff --git a/services/summary.go b/services/summary.go
index 1a81e38..abd7d3f 100644
--- a/services/summary.go
+++ b/services/summary.go
@@ -62,23 +62,15 @@ func (srv *SummaryService) Aliased(from, to time.Time, user *models.User, f Summ
 		return cacheResult.(*models.Summary), nil
 	}
 
-	// Wrap alias resolution
-	resolve := func(t uint8, k string) string {
-		s, _ := srv.aliasService.GetAliasOrDefault(user.ID, t, k)
-		return s
-	}
-	resolveReverse := func(t uint8, k string) []string {
-		aliases, _ := srv.aliasService.GetByUserAndKeyAndType(user.ID, k, t)
-		aliasStrings := make([]string, 0, len(aliases))
-		for _, a := range aliases {
-			aliasStrings = append(aliasStrings, a.Value)
-		}
-		return aliasStrings
-	}
+	// Resolver functions
+	resolveAliases := srv.getAliasResolver(user)
+	resolveAliasesReverse := srv.getAliasReverseResolver(user)
+	resolveProjectLabelsReverse := srv.getProjectLabelsReverseResolver(user)
 
 	// Post-process filters
 	if filters != nil {
-		filters = filters.WithAliases(resolveReverse)
+		filters = filters.WithAliases(resolveAliasesReverse)
+		filters = filters.WithProjectLabels(resolveProjectLabelsReverse)
 	}
 
 	// Initialize alias resolver service
@@ -93,7 +85,7 @@ func (srv *SummaryService) Aliased(from, to time.Time, user *models.User, f Summ
 	}
 
 	// Post-process summary and cache it
-	summary := s.WithResolvedAliases(resolve)
+	summary := s.WithResolvedAliases(resolveAliases)
 	summary = srv.withProjectLabels(summary)
 	summary.FillBy(models.SummaryProject, models.SummaryLabel) // first fill up labels from projects
 	summary.FillMissing()                                      // then, full up types which are entirely missing
@@ -419,3 +411,41 @@ func (srv *SummaryService) invalidateUserCache(userId string) {
 		}
 	}
 }
+
+func (srv *SummaryService) getAliasResolver(user *models.User) models.AliasResolver {
+	return func(t uint8, k string) string {
+		s, _ := srv.aliasService.GetAliasOrDefault(user.ID, t, k)
+		return s
+	}
+}
+
+func (srv *SummaryService) getAliasReverseResolver(user *models.User) models.AliasReverseResolver {
+	return func(t uint8, k string) []string {
+		aliases, err := srv.aliasService.GetByUserAndKeyAndType(user.ID, k, t)
+		if err != nil {
+			aliases = []*models.Alias{}
+		}
+		aliasStrings := make([]string, 0, len(aliases))
+		for _, a := range aliases {
+			aliasStrings = append(aliasStrings, a.Value)
+		}
+		return aliasStrings
+	}
+}
+
+func (srv *SummaryService) getProjectLabelsReverseResolver(user *models.User) models.ProjectLabelReverseResolver {
+	return func(k string) []string {
+		var labels []*models.ProjectLabel
+		allLabels, err := srv.projectLabelService.GetByUserGroupedInverted(user.ID)
+		if err == nil {
+			if l, ok := allLabels[k]; ok {
+				labels = l
+			}
+		}
+		projectStrings := make([]string, 0, len(labels))
+		for _, l := range labels {
+			projectStrings = append(projectStrings, l.ProjectKey)
+		}
+		return projectStrings
+	}
+}