diff --git a/README.md b/README.md
index 3611614..3b7c584 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,10 @@ simple workday recording with a basic rest api
 
 | method | url | arguments | description | 
 | ------ | --- | --------- | ----------- |
-| `get` | /csv| from=DD.MM.YYYY<br>to=DD.MM.YYYY | get recordings (in range) as csv |
-| `get` | /json| from=DD.MM.YYYY<br>to=DD.MM.YYYY | get recordings (in range) as json |
+| `get` | /csv| from=DD.MM.YYYY<br>to=DD.MM.YYYY | get recordings (for specified range) as csv |
+| `get` | /json| from=DD.MM.YYYY<br>to=DD.MM.YYYY | get recordings (for specified range) as json |
 | `get` | /today |  | get aggregated recordings for today as json (if any) |
+| `get` | /overtime |  | get aggregated overtime (for specified range) |
 | `post` | /start | | start a new recording | 
 | `post` | /stop | | stop the current recording (if any) |
 
diff --git a/config.yml b/config.yml
index 8e7db46..328f14a 100644
--- a/config.yml
+++ b/config.yml
@@ -13,6 +13,7 @@ report:
     - "Pause-Beginn"
     - "Pause-Ende"
     - "Pause-Dauer"
+    - "Saldo"
 
 users:
   exampleuser:
diff --git a/internal/api/server.go b/internal/api/server.go
index 9dc29ae..7aed1f7 100644
--- a/internal/api/server.go
+++ b/internal/api/server.go
@@ -30,7 +30,7 @@ func handleRequests(writer http.ResponseWriter, request *http.Request) {
 	requestMethod := strings.ToLower(request.Method)
 	user, authorized := isAuthorized(request)
 	if !authorized {
-		log.Info("denying unauthorized '"+requestMethod+"' request", "path: "+requestPath)
+		log.Info("denying unauthorized '"+requestMethod+"' request", "path: '"+requestPath+"'")
 		writer.WriteHeader(404)
 		writer.Write([]byte("error: basic authorization failed\n"))
 		return
@@ -43,10 +43,10 @@ func handleRequests(writer http.ResponseWriter, request *http.Request) {
 		handled = handlePost(user, writer, request)
 	}
 	if handled {
-		log.Debug("handled '"+requestMethod+"' request", "path: "+requestPath, "user: "+user)
+		log.Debug("handled '"+requestMethod+"' request", "path: '"+requestPath+"'", "user: '"+user+"'")
 		return
 	}
-	log.Debug("ignoring '"+requestMethod+"' request", "path: "+requestPath, "user: "+user)
+	log.Debug("ignoring '"+requestMethod+"' request", "path: '"+requestPath+"'", "user: '"+user+"'")
 	writer.WriteHeader(501)
 	writer.Write([]byte("error: endpoint '" + requestPath + "' not implemented\n"))
 }
@@ -78,6 +78,15 @@ func handleGet(user string, writer http.ResponseWriter, request *http.Request) b
 		}
 		writer.WriteHeader(200)
 		writer.Write([]byte(json + "\n"))
+	case "/overtime":
+		from, to := getTimespan(request.URL.Query())
+		overtime := workday.GetOvertime(from, to, user)
+		if len(overtime) == 0 {
+			writer.WriteHeader(404)
+			break
+		}
+		writer.WriteHeader(200)
+		writer.Write([]byte(overtime + "\n"))
 	case "/json":
 		from, to := getTimespan(request.URL.Query())
 		json, error := workday.ToJSON(from, to, user)
diff --git a/internal/tools/constants.go b/internal/tools/constants.go
index afaecce..f42dfdc 100644
--- a/internal/tools/constants.go
+++ b/internal/tools/constants.go
@@ -3,4 +3,4 @@ package tools
 import "time"
 
 var ZeroDate = time.Date(1, 1, 1, 0, 0, 0, 0, time.UTC)
-var ReportHeaders = []string{"date", "workday start", "workday end", "workday duration", "pause start", "pause end", "pause duration"}
+var ReportHeaders = []string{"date", "workday start", "workday end", "workday duration", "pause start", "pause end", "pause duration", "balance"}
diff --git a/internal/tools/datetime.go b/internal/tools/datetime.go
index e7131f4..cc62909 100644
--- a/internal/tools/datetime.go
+++ b/internal/tools/datetime.go
@@ -48,6 +48,11 @@ func TimeToHHMMSS(time time.Time) string {
 }
 
 func DurationToHHMMSS(duration time.Duration) string {
+	negative := false
+	if duration < 0 {
+		duration = duration * -1
+		negative = true
+	}
 	durationSeconds := duration.Seconds()
 	durationHours := int(durationSeconds / 3600)
 	if durationHours > 0 {
@@ -71,6 +76,9 @@ func DurationToHHMMSS(duration time.Duration) string {
 	for len(tmpDuration) < 8 {
 		tmpDuration = "0" + tmpDuration
 	}
+	if negative {
+		tmpDuration = "-" + tmpDuration
+	}
 	return tmpDuration
 }
 
diff --git a/internal/workday/workday.go b/internal/workday/workday.go
index b978616..ff56676 100644
--- a/internal/workday/workday.go
+++ b/internal/workday/workday.go
@@ -22,7 +22,8 @@ func ToCSV(from time.Time, to time.Time, user string) string {
 			tools.DurationToHHMMSS(workday.Duration) + ";" +
 			tools.TimeToHHMMSS(workday.Pause.Start) + ";" +
 			tools.TimeToHHMMSS(workday.Pause.Stop) + ";" +
-			tools.DurationToHHMMSS(workday.Pause.Duration)
+			tools.DurationToHHMMSS(workday.Pause.Duration) + ";" +
+			tools.DurationToHHMMSS(workday.Balance)
 	}
 	return report
 }
@@ -50,6 +51,9 @@ func ToJSON(from time.Time, to time.Time, user string) (string, error) {
 			}
 			workdayJson.Pause = pauseJson
 		}
+		if !workday.isOpen() {
+			workdayJson.Balance = tools.DurationToHHMMSS(workday.Balance)
+		}
 		jsonWorkdays = append(jsonWorkdays, workdayJson)
 	}
 	bytes, error := json.Marshal(jsonWorkdays)
@@ -73,10 +77,25 @@ func (workday *Workday) ToJSON(user string) (string, error) {
 		}
 		workdayJson.Pause = pauseJson
 	}
+	if !workday.isOpen() {
+		workdayJson.Balance = tools.DurationToHHMMSS(workday.Balance)
+	}
 	bytes, error := json.Marshal(workdayJson)
 	return string(bytes), error
 }
 
+func GetOvertime(from time.Time, to time.Time, user string) string {
+	workdays := getInRange(from, to, user)
+	if len(workdays) == 0 {
+		return ""
+	}
+	var overtime time.Duration
+	for _, workday := range workdays {
+		overtime += workday.Balance
+	}
+	return tools.DurationToHHMMSS(overtime)
+}
+
 func GetToday(user string) (Workday, error) {
 	var workday Workday
 	firstTimestamp := database.GetFirstTimestamp(user, time.Now())
@@ -94,6 +113,7 @@ func GetToday(user string) (Workday, error) {
 	} else {
 		workday.Duration = workday.Stop.Sub(workday.Start)
 	}
+	workday.Balance = workday.Duration - time.Hour*8
 	return workday, nil
 }
 
@@ -135,6 +155,7 @@ func aggregatedTimestampsToWorkdays(aggregatedTimestamps map[string][]database.T
 			Start:    tmpStart,
 			Stop:     tmpEnd,
 			Duration: duration,
+			Balance:  duration - time.Hour*8,
 		}
 		workday.insertFakePause()
 		workdays = append(workdays, workday)
@@ -154,13 +175,21 @@ func (workday *Workday) isOpen() bool {
 	return workday.Stop == tools.ZeroDate
 }
 
+func (workday *Workday) calculateBalance() {
+	workday.Balance = workday.Duration - time.Hour*8
+}
+
 func (workday *Workday) insertFakePause() {
 	var pause Pause
+	pauseLength := time.Minute * 30
+	if workday.Duration.Hours() >= 10 {
+		pauseLength = time.Minute * 60
+	}
 	deviationStart := rand.Intn(15-(-15)) + (-15)
 	pause.Start = workday.Start.Add(workday.Duration / 2)
 	pause.Start = pause.Start.Add(time.Minute * time.Duration(deviationStart))
 	deviationEnd := rand.Intn(300)
-	pause.Stop = pause.Start.Add(time.Minute * 30).Add(time.Second * time.Duration(deviationEnd))
+	pause.Stop = pause.Start.Add(pauseLength).Add(time.Second * time.Duration(deviationEnd))
 	pause.Duration = pause.Stop.Sub(pause.Start)
 	workday.Pause = pause
 	workday.Stop = workday.Stop.Add(workday.Pause.Duration)
@@ -173,6 +202,7 @@ type Workday struct {
 	Stop     time.Time
 	Duration time.Duration
 	Pause    Pause
+	Balance  time.Duration
 }
 
 type Pause struct {
@@ -189,6 +219,7 @@ type workdayJson struct {
 	Duration string
 	Open     bool
 	Pause    pauseJson
+	Balance  string
 }
 
 type pauseJson struct {