diff --git a/src/lib/elements.ts b/src/lib/elements.ts
index 4e87982..03251ae 100644
--- a/src/lib/elements.ts
+++ b/src/lib/elements.ts
@@ -17,10 +17,10 @@ export type ElementCategory =
 export type OwnerRole = "PERSON_A" | "PERSON_B" | "HOUSEHOLD";
 
 // Kategorien, deren Element zwingend genau einer Person zugeordnet ist.
-export const PERSON_ONLY_CATEGORIES: ElementCategory[] = ["INCOME", "AHV", "PENSION_FUND", "PILLAR_3A"];
+export const PERSON_ONLY_CATEGORIES: ElementCategory[] = ["AHV", "PENSION_FUND", "PILLAR_3A"];
 
-// Kategorien, die gemeinsam ODER pro Person erfasst werden koennen.
-export const OWNER_OPTIONAL_CATEGORIES: ElementCategory[] = ["EXPENSE", "REAL_ESTATE", "OTHER_ASSET", "OTHER_DEBT"];
+// Kategorien, die gemeinsam ODER pro Person erfasst werden koennen (inkl. Einkommen).
+export const OWNER_OPTIONAL_CATEGORIES: ElementCategory[] = ["INCOME", "EXPENSE", "REAL_ESTATE", "OTHER_ASSET", "OTHER_DEBT"];
 
 export const CATEGORY_LABELS: Record<ElementCategory, string> = {
   INCOME: "Einkommen",