diff --git a/tariff/embed.go b/tariff/embed.go
index 5b171e220..50dad0744 100644
--- a/tariff/embed.go
+++ b/tariff/embed.go
@@ -1,10 +1,12 @@
 package tariff
 
 type embed struct {
+	Margin  float64 `mapstructure:"margin"`
 	Charges float64 `mapstructure:"charges"`
 	Tax     float64 `mapstructure:"tax"`
+	Uplifts float64 `mapstructure:"uplifts"`
 }
 
 func (t *embed) totalPrice(price float64) float64 {
-	return (price + t.Charges) * (1 + t.Tax)
+	return (price*(1+t.Margin)+t.Charges)*(1+t.Tax) + t.Uplifts
 }