diff --git a/core/loadpoint/api.go b/core/loadpoint/api.go
index 25a95bbb8..83b6ef9d4 100644
--- a/core/loadpoint/api.go
+++ b/core/loadpoint/api.go
@@ -116,7 +116,7 @@ type API interface {
 	// SocBasedPlanning determines if the planner is soc based
 	SocBasedPlanning() bool
 	// GetPlan creates a charging plan
-	GetPlan(targetTime time.Time, requiredDuration time.Duration) (api.Rates, error)
+	GetPlan(targetTime time.Time, requiredDuration time.Duration) api.Rates
 
 	// GetSocConfig returns the soc poll settings
 	GetSocConfig() SocConfig
diff --git a/core/loadpoint/mock.go b/core/loadpoint/mock.go
index 0f150589d..620bdc20d 100644
--- a/core/loadpoint/mock.go
+++ b/core/loadpoint/mock.go
@@ -420,12 +420,11 @@ func (mr *MockAPIMockRecorder) GetPhasesConfigured() *gomock.Call {
 }
 
 // GetPlan mocks base method.
-func (m *MockAPI) GetPlan(targetTime time.Time, requiredDuration time.Duration) (api.Rates, error) {
+func (m *MockAPI) GetPlan(targetTime time.Time, requiredDuration time.Duration) api.Rates {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "GetPlan", targetTime, requiredDuration)
 	ret0, _ := ret[0].(api.Rates)
-	ret1, _ := ret[1].(error)
-	return ret0, ret1
+	return ret0
 }
 
 // GetPlan indicates an expected call of GetPlan.
diff --git a/core/loadpoint_plan.go b/core/loadpoint_plan.go
index 60f6acf92..064990ae0 100644
--- a/core/loadpoint_plan.go
+++ b/core/loadpoint_plan.go
@@ -79,9 +79,9 @@ func (lp *Loadpoint) GetPlanGoal() (float64, bool) {
 }
 
 // GetPlan creates a charging plan for given time and duration
-func (lp *Loadpoint) GetPlan(targetTime time.Time, requiredDuration time.Duration) (api.Rates, error) {
+func (lp *Loadpoint) GetPlan(targetTime time.Time, requiredDuration time.Duration) api.Rates {
 	if lp.planner == nil || targetTime.IsZero() {
-		return nil, nil
+		return nil
 	}
 
 	return lp.planner.Plan(requiredDuration, targetTime)
@@ -132,9 +132,8 @@ func (lp *Loadpoint) plannerActive() (active bool) {
 		return false
 	}
 
-	plan, err := lp.GetPlan(planTime, requiredDuration)
-	if err != nil {
-		lp.log.ERROR.Println("planner:", err)
+	plan := lp.GetPlan(planTime, requiredDuration)
+	if plan == nil {
 		return false
 	}
 
diff --git a/core/planner/planner.go b/core/planner/planner.go
index a9e3301f0..cfa976057 100644
--- a/core/planner/planner.go
+++ b/core/planner/planner.go
@@ -136,9 +136,9 @@ func (t *Planner) continuousPlan(rates api.Rates, start, end time.Time) api.Rate
 	return res
 }
 
-func (t *Planner) Plan(requiredDuration time.Duration, targetTime time.Time) (api.Rates, error) {
+func (t *Planner) Plan(requiredDuration time.Duration, targetTime time.Time) api.Rates {
 	if t == nil || requiredDuration <= 0 {
-		return nil, nil
+		return nil
 	}
 
 	latestStart := targetTime.Add(-requiredDuration)
@@ -157,19 +157,19 @@ func (t *Planner) Plan(requiredDuration time.Duration, targetTime time.Time) (ap
 
 	// target charging without tariff or late start
 	if t.tariff == nil {
-		return simplePlan, nil
+		return simplePlan
 	}
 
 	rates, err := t.tariff.Rates()
 
 	// treat like normal target charging if we don't have rates
 	if len(rates) == 0 || err != nil {
-		return simplePlan, err
+		return simplePlan
 	}
 
 	// consume remaining time
 	if t.clock.Until(targetTime) <= requiredDuration {
-		return t.continuousPlan(rates, latestStart, targetTime), nil
+		return t.continuousPlan(rates, latestStart, targetTime)
 	}
 
 	// rates are by default sorted by date, oldest to newest
@@ -183,7 +183,7 @@ func (t *Planner) Plan(requiredDuration time.Duration, targetTime time.Time) (ap
 		// there is enough time for charging after end of current rates
 		durationAfterRates := targetTime.Sub(last)
 		if durationAfterRates >= requiredDuration {
-			return nil, nil
+			return nil
 		}
 
 		// need to use some of the available slots
@@ -199,5 +199,5 @@ func (t *Planner) Plan(requiredDuration time.Duration, targetTime time.Time) (ap
 	// sort plan by time
 	plan.Sort()
 
-	return plan, nil
+	return plan
 }
diff --git a/core/planner/planner_test.go b/core/planner/planner_test.go
index e767447ba..e68972225 100644
--- a/core/planner/planner_test.go
+++ b/core/planner/planner_test.go
@@ -133,8 +133,29 @@ func TestNilTariff(t *testing.T) {
 		clock: clock,
 	}
 
-	plan, err := p.Plan(time.Hour, clock.Now().Add(30*time.Minute))
-	require.NoError(t, err)
+	plan := p.Plan(time.Hour, clock.Now().Add(30*time.Minute))
+	assert.Equal(t, api.Rates{
+		{
+			Start: clock.Now(),
+			End:   clock.Now().Add(60 * time.Minute),
+		},
+	}, plan, "expected simple plan")
+}
+
+func TestRatesError(t *testing.T) {
+	clock := clock.NewMock()
+	ctrl := gomock.NewController(t)
+
+	trf := api.NewMockTariff(ctrl)
+	trf.EXPECT().Rates().AnyTimes().Return(nil, api.ErrOutdated)
+
+	p := &Planner{
+		log:    util.NewLogger("foo"),
+		clock:  clock,
+		tariff: trf,
+	}
+
+	plan := p.Plan(time.Hour, clock.Now().Add(30*time.Minute))
 	assert.Equal(t, api.Rates{
 		{
 			Start: clock.Now(),
@@ -163,12 +184,10 @@ func TestFlatTariffTargetInThePast(t *testing.T) {
 		},
 	}
 
-	plan, err := p.Plan(time.Hour, clock.Now().Add(30*time.Minute))
-	require.NoError(t, err)
+	plan := p.Plan(time.Hour, clock.Now().Add(30*time.Minute))
 	assert.Equal(t, simplePlan, plan, "expected simple plan")
 
-	plan, err = p.Plan(time.Hour, clock.Now().Add(-30*time.Minute))
-	require.NoError(t, err)
+	plan = p.Plan(time.Hour, clock.Now().Add(-30*time.Minute))
 	assert.Equal(t, simplePlan, plan, "expected simple plan")
 }
 
@@ -189,14 +208,12 @@ func TestFlatTariffLongSlots(t *testing.T) {
 	// that slots are not longer than 1 hour and with that context this is not a problem
 
 	// expect 00:00-01:00 UTC
-	plan, err := p.Plan(time.Hour, clock.Now().Add(2*time.Hour))
-	require.NoError(t, err)
+	plan := p.Plan(time.Hour, clock.Now().Add(2*time.Hour))
 	assert.Equal(t, api.Rate{Start: clock.Now(), End: clock.Now().Add(time.Hour)}, SlotAt(clock.Now(), plan))
 	assert.Equal(t, api.Rate{}, SlotAt(clock.Now().Add(time.Hour), plan))
 
 	// expect 00:00-01:00 UTC
-	plan, err = p.Plan(time.Hour, clock.Now().Add(time.Hour))
-	require.NoError(t, err)
+	plan = p.Plan(time.Hour, clock.Now().Add(time.Hour))
 	assert.Equal(t, api.Rate{Start: clock.Now(), End: clock.Now().Add(time.Hour)}, SlotAt(clock.Now(), plan))
 }
 
@@ -213,12 +230,10 @@ func TestTargetAfterKnownPrices(t *testing.T) {
 		tariff: trf,
 	}
 
-	plan, err := p.Plan(40*time.Minute, clock.Now().Add(2*time.Hour)) // charge efficiency does not allow to test with 1h
-	require.NoError(t, err)
+	plan := p.Plan(40*time.Minute, clock.Now().Add(2*time.Hour)) // charge efficiency does not allow to test with 1h
 	assert.False(t, !SlotAt(clock.Now(), plan).IsZero(), "should not start if car can be charged completely after known prices ")
 
-	plan, err = p.Plan(2*time.Hour, clock.Now().Add(2*time.Hour))
-	require.NoError(t, err)
+	plan = p.Plan(2*time.Hour, clock.Now().Add(2*time.Hour))
 	assert.True(t, !SlotAt(clock.Now(), plan).IsZero(), "should start if car can not be charged completely after known prices ")
 }
 
@@ -242,12 +257,10 @@ func TestChargeAfterTargetTime(t *testing.T) {
 		},
 	}
 
-	plan, err := p.Plan(time.Hour, clock.Now())
-	require.NoError(t, err)
+	plan := p.Plan(time.Hour, clock.Now())
 	assert.Equal(t, simplePlan, plan, "expected simple plan")
 
-	plan, err = p.Plan(time.Hour, clock.Now().Add(-time.Hour))
-	require.NoError(t, err)
+	plan = p.Plan(time.Hour, clock.Now().Add(-time.Hour))
 	assert.Equal(t, simplePlan, plan, "expected simple plan")
 }
 
@@ -259,8 +272,7 @@ func TestContinuousPlanNoTariff(t *testing.T) {
 		clock: clock,
 	}
 
-	plan, err := p.Plan(time.Hour, clock.Now())
-	require.NoError(t, err)
+	plan := p.Plan(time.Hour, clock.Now())
 
 	// single-slot plan
 	assert.Len(t, plan, 1)
@@ -281,8 +293,7 @@ func TestContinuousPlan(t *testing.T) {
 		tariff: trf,
 	}
 
-	plan, err := p.Plan(150*time.Minute, clock.Now())
-	require.NoError(t, err)
+	plan := p.Plan(150*time.Minute, clock.Now())
 
 	// 3-slot plan
 	assert.Len(t, plan, 3)
@@ -301,8 +312,7 @@ func TestContinuousPlanOutsideRates(t *testing.T) {
 		tariff: trf,
 	}
 
-	plan, err := p.Plan(30*time.Minute, clock.Now())
-	require.NoError(t, err)
+	plan := p.Plan(30*time.Minute, clock.Now())
 
 	// 3-slot plan
 	assert.Len(t, plan, 1)
diff --git a/server/http_loadpoint_handler.go b/server/http_loadpoint_handler.go
index 632581873..a7def3467 100644
--- a/server/http_loadpoint_handler.go
+++ b/server/http_loadpoint_handler.go
@@ -50,8 +50,8 @@ func planHandler(lp loadpoint.API) http.HandlerFunc {
 
 		goal, _ := lp.GetPlanGoal()
 		requiredDuration := lp.GetPlanRequiredDuration(goal, maxPower)
-		plan, err := lp.GetPlan(planTime, requiredDuration)
-		if err != nil {
+		plan := lp.GetPlan(planTime, requiredDuration)
+		if plan == nil {
 			w.WriteHeader(http.StatusBadRequest)
 			return
 		}
@@ -109,8 +109,8 @@ func staticPlanPreviewHandler(lp loadpoint.API) http.HandlerFunc {
 
 		maxPower := lp.EffectiveMaxPower()
 		requiredDuration := lp.GetPlanRequiredDuration(goal, maxPower)
-		plan, err := lp.GetPlan(planTime, requiredDuration)
-		if err != nil {
+		plan := lp.GetPlan(planTime, requiredDuration)
+		if plan == nil {
 			w.WriteHeader(http.StatusBadRequest)
 			return
 		}
@@ -162,8 +162,8 @@ func repeatingPlanPreviewHandler(lp loadpoint.API) http.HandlerFunc {
 
 		maxPower := lp.EffectiveMaxPower()
 		requiredDuration := lp.GetPlanRequiredDuration(soc, maxPower)
-		plan, err := lp.GetPlan(planTime, requiredDuration)
-		if err != nil {
+		plan := lp.GetPlan(planTime, requiredDuration)
+		if plan == nil {
 			w.WriteHeader(http.StatusBadRequest)
 			return
 		}