diff --git a/example.json b/example.json
index 77a6913..47bd49d 100644
--- a/example.json
+++ b/example.json
@@ -10,12 +10,12 @@
 		"isKurthog": false
 	},
 	"stats":[
-		{"statName":"strength", "score":20, "proficient":false },
-		{"statName":"dexterity", "score":1, "proficient":false },
-		{"statName":"constitution", "score":15, "proficient":false },
-		{"statName":"intelligence", "score":10, "proficient":false },
-		{"statName":"wisdom", "score":10, "proficient":false },
-		{"statName":"charisma", "score":10, "proficient":false }
+		{"statName":"strength", "score":20, "proficient":false, "saveProficient":false },
+		{"statName":"dexterity", "score":1, "proficient":false, "saveProficient":false },
+		{"statName":"constitution", "score":15, "proficient":false, "saveProficient":false },
+		{"statName":"intelligence", "score":10, "proficient":false, "saveProficient":false },
+		{"statName":"wisdom", "score":10, "proficient":false, "saveProficient":false },
+		{"statName":"charisma", "score":10, "proficient":false, "saveProficient":false }
 	],
 	"skills":[
 		{"skillName":"athletics", "proficient":true, "expertise":false, "baseStat":"strength"},
diff --git a/main.go b/main.go
index 9d06b00..4d4938f 100644
--- a/main.go
+++ b/main.go
@@ -99,17 +99,8 @@ func main() {
 		fmt.Printf("Name: %s\tLevel: %d\tProficiency: %d\n", char.Misc.Name, char.Misc.Level, GetProficiency())
 		fmt.Printf("Race: %s\tClass: %s\tBackground: %s\n", char.Misc.Race, char.Misc.Class, char.Misc.Background)
 
-		// passive perception
-		var passivePerception int
-		switch {
-		case GetSkill("perception").Proficient && GetSkill("perception").Expertise:
-			passivePerception = 10 + GetModifier(GetStat("wisdom")) + GetProficiency()*2
-		case GetSkill("perception").Proficient:
-			passivePerception = 10 + GetModifier(GetStat("wisdom")) + GetProficiency()
-		default:
-			passivePerception = 10 + GetModifier(GetStat("wisdom"))
-		}
-		fmt.Printf("Passive perception: %d\n", passivePerception)
+		fmt.Printf("Passive perception: %d\n", passiveSkillCheck(GetSkill("perception")))
+		fmt.Printf("Passive investigation: %d\n", passiveSkillCheck(GetSkill("investigation")))
 
 	case feats:
 		listFeats()
@@ -275,19 +266,40 @@ func skillErrorCheck() error {
 func statCheck(stat Stat) (int, int, error) {
 	die := rollDice()
 	return die + GetModifier(stat), die, statErrorCheck()
-
 }
 
 func savingThrow(stat Stat) (int, int, error) {
 	die := rollDice()
 	plainDie := die
 
-	if stat.Proficient {
+	if stat.SaveProficient {
 		die += GetProficiency()
 	}
 	return die + GetModifier(stat), plainDie, statErrorCheck()
 }
 
+func passiveSkillCheck(skill Skill) int {
+	die := 10
+
+	die += GetModifier(GetStat(skill.BaseStat))
+
+	switch {
+	case skill.Expertise:
+		die += GetProficiency() * 2
+	case skill.Proficient:
+		die += GetProficiency()
+	case !skill.Proficient && char.Misc.JackOfAllTrades:
+		die += (GetProficiency() / 2)
+	}
+	switch {
+	case advantage:
+		die += 5
+	case disadvantage:
+		die -= 5
+	}
+	return die
+}
+
 func skillCheck(skill Skill) (int, int, error) {
 	die := rollDice()
 	if char.Misc.ReliableTalent && skill.Proficient && die < 10 {
diff --git a/sheetContent.go b/sheetContent.go
index d80b44c..afc6a43 100644
--- a/sheetContent.go
+++ b/sheetContent.go
@@ -26,9 +26,10 @@ type Skill struct {
 }
 
 type Stat struct {
-	StatName   string `json:"statName"`
-	Score      int    `json:"score"`
-	Proficient bool   `json:"proficient"`
+	StatName       string `json:"statName"`
+	Score          int    `json:"score"`
+	Proficient     bool   `json:"proficient"`
+	SaveProficient bool   `json:"saveProficient"`
 }
 
 type Feat struct {