diff --git a/api/src/modules/impact/comparison/actual-vs-scenario.service.ts b/api/src/modules/impact/comparison/actual-vs-scenario.service.ts
index e4d47ab26..f306f1558 100644
--- a/api/src/modules/impact/comparison/actual-vs-scenario.service.ts
+++ b/api/src/modules/impact/comparison/actual-vs-scenario.service.ts
@@ -248,16 +248,21 @@ export class ActualVsScenarioImpactService {
     return rangeOfYears.map((year: number) => {
       const totalSumByYear: number = yearSumMap.get(year) || 0;
       const totalScenarioSumByYear: number = yearScenarioSumMap.get(year) || 0;
+      const absoluteDifference: number =
+        totalScenarioSumByYear - totalSumByYear;
+      const percentageDifference: number =
+        ((totalScenarioSumByYear - totalSumByYear) /
+          ((totalScenarioSumByYear + totalSumByYear) / 2)) *
+        100;
 
       return {
         year,
         value: totalSumByYear,
         comparedScenarioValue: totalScenarioSumByYear,
-        absoluteDifference: totalScenarioSumByYear - totalSumByYear,
-        percentageDifference:
-          ((totalScenarioSumByYear - totalSumByYear) /
-            ((totalScenarioSumByYear + totalSumByYear) / 2)) *
-          100,
+        absoluteDifference,
+        percentageDifference: isNaN(percentageDifference)
+          ? 0
+          : percentageDifference,
         isProjected: year > lastYearWithData,
       };
     });
@@ -319,13 +324,20 @@ export class ActualVsScenarioImpactService {
           valueToAggregate[valueIndex].isProjected ||
           entityRowValue.isProjected;
 
-        entityRowValue.absoluteDifference =
+        const absoluteDifference: number =
           entityRowValue.comparedScenarioValue - entityRowValue.value;
-        entityRowValue.percentageDifference =
+        const percentageDifference: number =
           ((entityRowValue.comparedScenarioValue - entityRowValue.value) /
             ((entityRowValue.comparedScenarioValue + entityRowValue.value) /
               2)) *
           100;
+
+        entityRowValue.absoluteDifference = isNaN(absoluteDifference)
+          ? 0
+          : absoluteDifference;
+        entityRowValue.percentageDifference = isNaN(percentageDifference)
+          ? 0
+          : percentageDifference;
       }
     }
     return entity.values;
diff --git a/api/src/modules/impact/comparison/scenario-vs-scenario.service.ts b/api/src/modules/impact/comparison/scenario-vs-scenario.service.ts
index dd4fb13b8..b50931fdd 100644
--- a/api/src/modules/impact/comparison/scenario-vs-scenario.service.ts
+++ b/api/src/modules/impact/comparison/scenario-vs-scenario.service.ts
@@ -238,16 +238,23 @@ export class ScenarioVsScenarioImpactService {
           valueToAggregate[valueIndex].isProjected ||
           entityRowValue.isProjected;
 
-        entityRowValue.absoluteDifference =
+        const absoluteDifference: number =
           entityRowValue.comparedScenarioValue -
           entityRowValue.baseScenarioValue;
-        entityRowValue.percentageDifference =
+        const percentageDifference: number =
           ((entityRowValue.comparedScenarioValue -
             entityRowValue.baseScenarioValue) /
             ((entityRowValue.comparedScenarioValue +
               entityRowValue.baseScenarioValue) /
               2)) *
           100;
+
+        entityRowValue.absoluteDifference = isNaN(absoluteDifference)
+          ? 0
+          : absoluteDifference;
+        entityRowValue.percentageDifference = isNaN(percentageDifference)
+          ? 0
+          : percentageDifference;
       }
     }
     return entity.values;
@@ -423,19 +430,23 @@ export class ScenarioVsScenarioImpactService {
       const comparedScenarioTotalSumByYear: number =
         comparedScenarioYearSumMap.get(year) || 0;
 
+      const absoluteDifference: number =
+        comparedScenarioTotalSumByYear - (baseScenarioTotalSumByYear || 0);
+      const percentageDifference: number =
+        ((comparedScenarioTotalSumByYear - (baseScenarioTotalSumByYear || 0)) /
+          ((comparedScenarioTotalSumByYear +
+            (baseScenarioTotalSumByYear || 0)) /
+            2)) *
+        100;
+
       return {
         year,
         baseScenarioValue: baseScenarioTotalSumByYear,
         comparedScenarioValue: comparedScenarioTotalSumByYear,
-        absoluteDifference:
-          comparedScenarioTotalSumByYear - (baseScenarioTotalSumByYear || 0),
-        percentageDifference:
-          ((comparedScenarioTotalSumByYear -
-            (baseScenarioTotalSumByYear || 0)) /
-            ((comparedScenarioTotalSumByYear +
-              (baseScenarioTotalSumByYear || 0)) /
-              2)) *
-          100,
+        absoluteDifference: isNaN(absoluteDifference) ? 0 : absoluteDifference,
+        percentageDifference: isNaN(percentageDifference)
+          ? 0
+          : percentageDifference,
         isProjected: year > lastYearWithData,
       };
     });
diff --git a/api/test/e2e/impact/impact-reports/impact-reports.spec.ts b/api/test/e2e/impact/impact-reports/impact-reports.spec.ts
index 2b1081718..748270b53 100644
--- a/api/test/e2e/impact/impact-reports/impact-reports.spec.ts
+++ b/api/test/e2e/impact/impact-reports/impact-reports.spec.ts
@@ -59,7 +59,7 @@ describe('Impact Reports', () => {
   });
   it('should create a scenario vs scenario impact report', async () => {
     const { baseScenario, comparedScenario, indicator } =
-      await fixtures.GivenTwoScenarios();
+      await fixtures.GivenTwoScenarioWithInterventions();
     const response = await fixtures.WhenIRequestAScenarioVsScenarioImpactReport(
       {
         app: testApplication,
diff --git a/api/test/e2e/impact/impact-reports/impactReportFixtures.ts b/api/test/e2e/impact/impact-reports/impactReportFixtures.ts
index 4737f5c38..a23e9dabe 100644
--- a/api/test/e2e/impact/impact-reports/impactReportFixtures.ts
+++ b/api/test/e2e/impact/impact-reports/impactReportFixtures.ts
@@ -106,7 +106,7 @@ export const impactReportFixtures = () => ({
       scenarioIntervention,
     };
   },
-  GivenTwoScenarios: async (): Promise<any> => {
+  GivenTwoScenarioWithInterventions: async (): Promise<any> => {
     const {
       newScenarioChangeSupplier: baseScenario,
       newScenarioChangeMaterial: comparedScenario,
diff --git a/api/test/e2e/impact/mocks/actual-vs-scenario-responses/mixed-interventions-scenario.response.ts b/api/test/e2e/impact/mocks/actual-vs-scenario-responses/mixed-interventions-scenario.response.ts
index ca6aeea74..20a386ee9 100644
--- a/api/test/e2e/impact/mocks/actual-vs-scenario-responses/mixed-interventions-scenario.response.ts
+++ b/api/test/e2e/impact/mocks/actual-vs-scenario-responses/mixed-interventions-scenario.response.ts
@@ -216,7 +216,7 @@ export const mixedInterventionsScenarioTable2019 = {
                   comparedScenarioValue: 0,
                   isProjected: false,
                   absoluteDifference: 0,
-                  percentageDifference: null,
+                  percentageDifference: 0,
                 },
                 {
                   year: 2020,
@@ -262,7 +262,7 @@ export const mixedInterventionsScenarioTable2019 = {
                   comparedScenarioValue: 0,
                   isProjected: false,
                   absoluteDifference: 0,
-                  percentageDifference: null,
+                  percentageDifference: 0,
                 },
                 {
                   year: 2020,
@@ -308,7 +308,7 @@ export const mixedInterventionsScenarioTable2019 = {
                   comparedScenarioValue: 0,
                   isProjected: false,
                   absoluteDifference: 0,
-                  percentageDifference: null,
+                  percentageDifference: 0,
                 },
                 {
                   year: 2020,
@@ -352,7 +352,7 @@ export const mixedInterventionsScenarioTable2019 = {
               comparedScenarioValue: 0,
               isProjected: false,
               absoluteDifference: 0,
-              percentageDifference: null,
+              percentageDifference: 0,
             },
             {
               year: 2020,
@@ -395,7 +395,7 @@ export const mixedInterventionsScenarioTable2019 = {
           value: 0,
           comparedScenarioValue: 0,
           absoluteDifference: 0,
-          percentageDifference: null,
+          percentageDifference: 0,
         },
         {
           year: 2020,
diff --git a/api/test/e2e/impact/mocks/scenario-vs-scenario-responses/same-materials-scenarios.reponse.ts b/api/test/e2e/impact/mocks/scenario-vs-scenario-responses/same-materials-scenarios.reponse.ts
index f8a5e4495..1263163b2 100644
--- a/api/test/e2e/impact/mocks/scenario-vs-scenario-responses/same-materials-scenarios.reponse.ts
+++ b/api/test/e2e/impact/mocks/scenario-vs-scenario-responses/same-materials-scenarios.reponse.ts
@@ -252,7 +252,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2019,
@@ -260,7 +260,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2020,
@@ -298,7 +298,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2019,
@@ -306,7 +306,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2020,
@@ -344,7 +344,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2019,
@@ -352,7 +352,7 @@ export function getComparisonResponseWithProjectedYears(
                     comparedScenarioValue: 0,
                     isProjected: false,
                     absoluteDifference: 0,
-                    percentageDifference: null,
+                    percentageDifference: 0,
                   },
                   {
                     year: 2020,
@@ -388,7 +388,7 @@ export function getComparisonResponseWithProjectedYears(
                 comparedScenarioValue: 0,
                 isProjected: false,
                 absoluteDifference: 0,
-                percentageDifference: null,
+                percentageDifference: 0,
               },
               {
                 year: 2019,
@@ -396,7 +396,7 @@ export function getComparisonResponseWithProjectedYears(
                 comparedScenarioValue: 0,
                 isProjected: false,
                 absoluteDifference: 0,
-                percentageDifference: null,
+                percentageDifference: 0,
               },
               {
                 year: 2020,
@@ -431,7 +431,7 @@ export function getComparisonResponseWithProjectedYears(
             baseScenarioValue: 0,
             comparedScenarioValue: 0,
             absoluteDifference: 0,
-            percentageDifference: null,
+            percentageDifference: 0,
             isProjected: false,
           },
           {
@@ -439,7 +439,7 @@ export function getComparisonResponseWithProjectedYears(
             baseScenarioValue: 0,
             comparedScenarioValue: 0,
             absoluteDifference: 0,
-            percentageDifference: null,
+            percentageDifference: 0,
             isProjected: false,
           },
           {