diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index 6a3c1f145a..b12bc2babe 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -1035,7 +1035,6 @@ export class PortfolioService {
       return {
         chart: [],
         dateOfFirstActivity: undefined,
-        firstOrderDate: undefined,
         hasErrors: false,
         performance: {
           currentNetWorth: 0,
@@ -1093,7 +1092,6 @@ export class PortfolioService {
       errors,
       hasErrors,
       dateOfFirstActivity: parseDate(historicalData[0]?.date),
-      firstOrderDate: parseDate(historicalData[0]?.date),
       performance: {
         netPerformance,
         netPerformanceWithCurrencyEffect,
diff --git a/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts b/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
index 104302de3d..8177bd533c 100644
--- a/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
+++ b/libs/common/src/lib/interfaces/responses/portfolio-performance-response.interface.ts
@@ -5,11 +5,5 @@ import { ResponseError } from './errors.interface';
 export interface PortfolioPerformanceResponse extends ResponseError {
   chart?: HistoricalDataItem[];
   dateOfFirstActivity: Date;
-
-  /**
-   * @deprecated Use `dateOfFirstActivity` instead
-   */
-  firstOrderDate: Date;
-
   performance: PortfolioPerformance;
 }