diff --git a/docs/Characteristics.md b/docs/Characteristics.md
index c7c7723..a732248 100644
--- a/docs/Characteristics.md
+++ b/docs/Characteristics.md
@@ -142,3 +142,5 @@ volumeSiaAvv | Volume SIA-AVV in m³ | positiveDecimal
 volumeSiaGv | Volume SIA-GV in m³ | positiveDecimal
 yearBuilt | Year of construction, in four digits. | year
 yearLastRenovated | Year of last renovation, in four digits. | year
+rentalIncomeNet | Current annual income excluding extra costs. | positiveInteger
+rentalIncomeNetMaxPotential | Max potential annual rental income if completely rented out excluding extra costs. | positiveInteger
\ No newline at end of file
diff --git a/schema/schema.xsd b/schema/schema.xsd
index 80695a3..8e334d2 100644
--- a/schema/schema.xsd
+++ b/schema/schema.xsd
@@ -669,6 +669,16 @@
           <xs:documentation>Year of last renovation, in four digits.</xs:documentation>
         </xs:annotation>
       </xs:element>
+      <xs:element name="rentalIncomeNet" type="xs:positiveInteger" minOccurs="0" maxOccurs="1">
+        <xs:annotation>
+          <xs:documentation>Current annual income excluding extra costs.</xs:documentation>
+        </xs:annotation>
+      </xs:element>
+      <xs:element name="rentalIncomeNetMaxPotential" type="xs:positiveInteger" minOccurs="0" maxOccurs="1">
+        <xs:annotation>
+          <xs:documentation>Max potential annual rental income if completely rented out excluding extra costs.</xs:documentation>
+        </xs:annotation>
+      </xs:element>
     </xs:all>
   </xs:complexType>
   <xs:complexType name="person">