diff --git a/cmd/numerus/main.go b/cmd/numerus/main.go
index c9cc57f..de988db 100644
--- a/cmd/numerus/main.go
+++ b/cmd/numerus/main.go
@@ -20,9 +20,12 @@ func main() {
 	}
 	defer db.Close()
 
+	var demo bool
+	_ = db.QueryRow(context.Background(), "select database_is_numerus_demo()").Scan(&demo)
+
 	srv := http.Server{
 		Addr:         ":8080",
-		Handler:      numerus.NewRouter(db),
+		Handler:      numerus.NewRouter(db, demo),
 		ReadTimeout:  5 * time.Second,
 		WriteTimeout: 10 * time.Second,
 		IdleTimeout:  2 * time.Minute,
diff --git a/demo/demo.sql b/demo/demo.sql
index a5a2ea8..17ed672 100644
--- a/demo/demo.sql
+++ b/demo/demo.sql
@@ -2,6 +2,8 @@ begin;
 
 set search_path to auth, numerus, public;
 
+create or replace function public.database_is_numerus_demo() returns bool as $$ select true $$ language sql;
+
 alter sequence user_user_id_seq restart with 123;
 insert into auth."user" (email, name, password, role)
 values ('demo@numerus', 'Demo User', 'demo', 'invoicer')
diff --git a/pkg/login.go b/pkg/login.go
index 658d85a..95ed5dc 100644
--- a/pkg/login.go
+++ b/pkg/login.go
@@ -29,8 +29,8 @@ type loginForm struct {
 	Password *InputField
 }
 
-func newLoginForm(locale *Locale) *loginForm {
-	return &loginForm{
+func newLoginForm(demo bool, locale *Locale) *loginForm {
+	form := &loginForm{
 		locale: locale,
 		Email: &InputField{
 			Name:     "email",
@@ -53,6 +53,11 @@ func newLoginForm(locale *Locale) *loginForm {
 			},
 		},
 	}
+	if demo {
+		form.Email.Val = "admin@numerus"
+		form.Password.Val = "admin"
+	}
+	return form
 }
 
 func (form *loginForm) Parse(r *http.Request) error {
@@ -74,26 +79,26 @@ func (form *loginForm) Validate() bool {
 	return validator.AllOK()
 }
 
-func GetLoginForm(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+func GetLoginForm(w http.ResponseWriter, r *http.Request, demo bool) {
 	user := getUser(r)
 	if user.LoggedIn {
 		http.Redirect(w, r, "/", http.StatusSeeOther)
 		return
 	}
 	locale := getLocale(r)
-	form := newLoginForm(locale)
+	form := newLoginForm(demo, locale)
 	w.WriteHeader(http.StatusOK)
 	mustRenderLoginForm(w, r, form)
 }
 
-func HandleLoginForm(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+func HandleLoginForm(w http.ResponseWriter, r *http.Request, demo bool) {
 	user := getUser(r)
 	if user.LoggedIn {
 		http.Redirect(w, r, "/", http.StatusSeeOther)
 		return
 	}
 	locale := getLocale(r)
-	form := newLoginForm(locale)
+	form := newLoginForm(demo, locale)
 	if err := form.Parse(r); err != nil {
 		http.Error(w, err.Error(), http.StatusBadRequest)
 		return
diff --git a/pkg/router.go b/pkg/router.go
index e5c698d..191b6a6 100644
--- a/pkg/router.go
+++ b/pkg/router.go
@@ -6,7 +6,7 @@ import (
 	"net/http"
 )
 
-func NewRouter(db *Db) http.Handler {
+func NewRouter(db *Db, demo bool) http.Handler {
 	companyRouter := httprouter.New()
 	companyRouter.GET("/profile", GetProfileForm)
 	companyRouter.POST("/profile", HandleProfileForm)
@@ -62,8 +62,12 @@ func NewRouter(db *Db) http.Handler {
 
 	router := httprouter.New()
 	router.ServeFiles("/static/*filepath", http.Dir("web/static"))
-	router.GET("/login", GetLoginForm)
-	router.POST("/login", HandleLoginForm)
+	router.GET("/login", func(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+		GetLoginForm(w, r, demo)
+	})
+	router.POST("/login", func(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
+		HandleLoginForm(w, r, demo)
+	})
 	router.POST("/logout", Authenticated(HandleLogout))
 
 	companyHandler := Authenticated(CompanyHandler(companyRouter))