diff --git a/tariff/tibber.go b/tariff/tibber.go
index ee93c9347..ad26a5038 100644
--- a/tariff/tibber.go
+++ b/tariff/tibber.go
@@ -110,7 +110,7 @@ func (t *Tibber) rates(pi []tibber.Price) api.Rates {
 	data := make(api.Rates, 0, len(pi))
 	for _, r := range pi {
 		price := r.Total
-		if t.Charges != 0 || t.Tax != 0 {
+		if t.Charges != 0 || t.Tax != 0 || t.Formula != "" {
 			price = t.totalPrice(r.Energy, r.StartsAt)
 		}
 		ar := api.Rate{