diff --git a/cmd/tsk/tsk.go b/cmd/tsk/tsk.go
index 5167756..8894fd4 100644
--- a/cmd/tsk/tsk.go
+++ b/cmd/tsk/tsk.go
@@ -30,6 +30,7 @@ type Options struct {
 	pure           bool
 	taskFile       string
 	tasks          []string
+	time           bool
 	which          bool
 }
 
@@ -50,6 +51,7 @@ func main() {
 	flag.BoolVar(&opts.prefix, "prefix", false, "prefix task output with the task name")
 	flag.BoolVarP(&opts.pure, "pure", "", false, "don't inherit the parent env")
 	flag.StringVarP(&opts.taskFile, "file", "f", "", "taskfile to use")
+	flag.BoolVar(&opts.time, "time", false, "show task duration after completion")
 	flag.BoolVar(&opts.which, "which", false, "print the path to the found tasks.toml, or an error")
 	flag.BoolVarP(&help, "help", "h", false, "")
 	flag.Parse()
@@ -94,6 +96,7 @@ func main() {
 		Stderr: os.Stderr,
 		Config: cfg,
 		Prefix: opts.prefix,
+		Time:   opts.time,
 	}
 
 	if opts.listTasks {
diff --git a/internal/task/task.go b/internal/task/task.go
index 33ec385..e933477 100644
--- a/internal/task/task.go
+++ b/internal/task/task.go
@@ -11,6 +11,7 @@ import (
 	"regexp"
 	"strings"
 	"sync"
+	"time"
 
 	output "github.com/notnmeyer/tsk/internal/outputformat"
 
@@ -48,6 +49,7 @@ type Executor struct {
 	Stderr      io.Writer
 	Config      *Config
 	Prefix      bool
+	Time        bool
 	colorIndex  int
 	taskColors  map[string]string
 }
@@ -131,6 +133,8 @@ func (exec *Executor) RunTasks(config *Config, tasks *[]string) error {
 			taskConfig.Dir = config.TaskFileDir
 		}
 
+		taskStart := time.Now()
+
 		if len(taskConfig.Deps) > 0 {
 			for _, depGroup := range taskConfig.Deps {
 				var wg sync.WaitGroup
@@ -162,6 +166,7 @@ func (exec *Executor) RunTasks(config *Config, tasks *[]string) error {
 			Stdin:  exec.Stdin,
 			Config: exec.Config,
 			Prefix: exec.Prefix,
+			Time:   exec.Time,
 		}
 
 		// if a task contains cmds, run them
@@ -184,6 +189,10 @@ func (exec *Executor) RunTasks(config *Config, tasks *[]string) error {
 				os.Exit(1)
 			}
 		}
+
+		if exec.Time && exec.Stderr != nil {
+			fmt.Fprintf(exec.Stderr, "::%s:: duration %s\n", task, formatDuration(time.Since(taskStart)))
+		}
 	}
 	return nil
 }
@@ -314,6 +323,18 @@ func (exec *Executor) VerifyTasks(tasks []string) error {
 	return nil
 }
 
+func formatDuration(d time.Duration) string {
+	if d < time.Second {
+		return fmt.Sprintf("%dms", d.Milliseconds())
+	}
+	if d < time.Minute {
+		return fmt.Sprintf("%.2fs", d.Seconds())
+	}
+	m := int(d.Minutes())
+	s := d.Seconds() - float64(m*60)
+	return fmt.Sprintf("%dm%.2fs", m, s)
+}
+
 func filterTasks(tasks *map[string]Task, regex *regexp.Regexp) map[string]Task {
 	filtered := make(map[string]Task)
 	for k, v := range *tasks {