diff --git a/src/app/(protected)/workorders/_components/comp-doc/comp-doc-dialog.tsx b/src/app/(protected)/workorders/_components/comp-doc/comp-doc-dialog.tsx
index 74d9c75e..6fe91dd6 100644
--- a/src/app/(protected)/workorders/_components/comp-doc/comp-doc-dialog.tsx
+++ b/src/app/(protected)/workorders/_components/comp-doc/comp-doc-dialog.tsx
@@ -11,6 +11,7 @@ import {
   formatMediaSizeLimit,
   isWorkOrderDocumentsReadOnly,
   isWorkOrderFileTooLarge,
+  MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
 } from "@/domain/work-orders/utils/work-order-media-limits";
 import { useCompDocDialog } from "@/app/(protected)/workorders/_hooks/use-comp-doc-dialog";
 import { CompDocDialogFooter } from "./comp-doc-dialog-footer";
@@ -35,8 +36,8 @@ type UseCompDocPdfUploadArgs = {
 };
 
 function rejectCompDocPdf(file: File, rowVersion: string): string | null {
-  if (isWorkOrderFileTooLarge(file)) {
-    return `File exceeds the ${formatMediaSizeLimit()} limit.`;
+  if (isWorkOrderFileTooLarge(file, MAX_WORK_ORDER_COMPLETION_DOC_BYTES)) {
+    return `File exceeds the ${formatMediaSizeLimit(MAX_WORK_ORDER_COMPLETION_DOC_BYTES)} limit.`;
   }
   if (file.type !== "application/pdf" && !file.name.toLowerCase().endsWith(".pdf")) {
     return "Please upload a PDF file.";
diff --git a/src/app/(protected)/workorders/_components/comp-doc/use-comp-doc-pdf-actions.ts b/src/app/(protected)/workorders/_components/comp-doc/use-comp-doc-pdf-actions.ts
index 5d3b6475..23861a53 100644
--- a/src/app/(protected)/workorders/_components/comp-doc/use-comp-doc-pdf-actions.ts
+++ b/src/app/(protected)/workorders/_components/comp-doc/use-comp-doc-pdf-actions.ts
@@ -11,6 +11,7 @@ import { fmtDocNow } from "@/domain/work-orders/utils/completion-doc-state";
 import {
   formatMediaSizeLimit,
   isWorkOrderFileTooLarge,
+  MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
 } from "@/domain/work-orders/utils/work-order-media-limits";
 
 type UseCompDocPdfActionsArgs = {
@@ -55,8 +56,10 @@ export function useCompDocPdfActions({
   function handleUploadPdf(files: FileList | null) {
     const file = files?.[0];
     if (!file) return;
-    if (isWorkOrderFileTooLarge(file)) {
-      toast.error(`File exceeds the ${formatMediaSizeLimit()} limit.`);
+    if (isWorkOrderFileTooLarge(file, MAX_WORK_ORDER_COMPLETION_DOC_BYTES)) {
+      toast.error(
+        `File exceeds the ${formatMediaSizeLimit(MAX_WORK_ORDER_COMPLETION_DOC_BYTES)} limit.`,
+      );
       return;
     }
     if (file.type !== "application/pdf" && !file.name.toLowerCase().endsWith(".pdf")) {
diff --git a/src/app/(protected)/workorders/_components/detail/tabs/slide-over-completion-tab.tsx b/src/app/(protected)/workorders/_components/detail/tabs/slide-over-completion-tab.tsx
index cf89d2bf..f88e3867 100644
--- a/src/app/(protected)/workorders/_components/detail/tabs/slide-over-completion-tab.tsx
+++ b/src/app/(protected)/workorders/_components/detail/tabs/slide-over-completion-tab.tsx
@@ -11,6 +11,7 @@ import { hasCompletionMediaGallery } from "@/domain/work-orders/utils/partition-
 import {
   formatMediaSizeLimit,
   isWorkOrderFileTooLarge,
+  MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
 } from "@/domain/work-orders/utils/work-order-media-limits";
 import { SlideOverCompletionActions } from "./slide-over-completion-actions";
 import { SlideOverCompletionMedia } from "./slide-over-completion-media";
@@ -71,8 +72,10 @@ export function SlideOverCompletionTab({
   const handlePdfSelected = (files: FileList | null) => {
     const file = files?.[0];
     if (!file || !onUploadCompletionPdf) return;
-    if (isWorkOrderFileTooLarge(file)) {
-      toast.error(`File exceeds the ${formatMediaSizeLimit()} limit.`);
+    if (isWorkOrderFileTooLarge(file, MAX_WORK_ORDER_COMPLETION_DOC_BYTES)) {
+      toast.error(
+        `File exceeds the ${formatMediaSizeLimit(MAX_WORK_ORDER_COMPLETION_DOC_BYTES)} limit.`,
+      );
       return;
     }
     if (file.type !== "application/pdf" && !file.name.toLowerCase().endsWith(".pdf")) {
diff --git a/src/domain/work-orders/utils/work-order-media-limits.ts b/src/domain/work-orders/utils/work-order-media-limits.ts
index 56b7aaef..00d9d261 100644
--- a/src/domain/work-orders/utils/work-order-media-limits.ts
+++ b/src/domain/work-orders/utils/work-order-media-limits.ts
@@ -1,8 +1,11 @@
 import { isWorkOrderCompletionSurfaceReadOnly } from "@/domain/work-orders/utils/work-order-lock";
 
-/** Backend RequestSizeLimit for media and completion-doc uploads. */
+/** Backend RequestSizeLimit for media uploads and Extra Docs. */
 export const MAX_WORK_ORDER_MEDIA_BYTES = 200_000_000;
 
+/** Backend RequestSizeLimit for completion-document uploads. */
+export const MAX_WORK_ORDER_COMPLETION_DOC_BYTES = 50_000_000;
+
 const MEDIA_MIME_TYPES = new Set([
   "image/jpeg",
   "image/jpg",
diff --git a/src/test/domain/work-orders/utils/work-order-media-limits.test.ts b/src/test/domain/work-orders/utils/work-order-media-limits.test.ts
index 4a236b46..da86cd31 100644
--- a/src/test/domain/work-orders/utils/work-order-media-limits.test.ts
+++ b/src/test/domain/work-orders/utils/work-order-media-limits.test.ts
@@ -6,6 +6,7 @@ import {
   isWorkOrderExtraDocTypeAllowed,
   isWorkOrderFileTooLarge,
   isWorkOrderMediaTypeAllowed,
+  MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
   MAX_WORK_ORDER_MEDIA_BYTES,
   workOrderExtraDocsAcceptAttribute,
   workOrderMediaAcceptAttribute,
@@ -32,6 +33,23 @@ describe("work-order-media-limits", () => {
     expect(isWorkOrderFileTooLarge({ size: 10 } as File)).toBe(false);
   });
 
+  it("caps completion-document uploads at 50_000_000 bytes and formats the completion copy", () => {
+    expect(MAX_WORK_ORDER_COMPLETION_DOC_BYTES).toBe(50_000_000);
+    expect(formatMediaSizeLimit(MAX_WORK_ORDER_COMPLETION_DOC_BYTES)).toBe("50 MB");
+    expect(
+      isWorkOrderFileTooLarge(
+        { size: MAX_WORK_ORDER_COMPLETION_DOC_BYTES } as File,
+        MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
+      ),
+    ).toBe(false);
+    expect(
+      isWorkOrderFileTooLarge(
+        { size: MAX_WORK_ORDER_COMPLETION_DOC_BYTES + 1 } as File,
+        MAX_WORK_ORDER_COMPLETION_DOC_BYTES,
+      ),
+    ).toBe(true);
+  });
+
   it("allows only JPG PNG MP4 MOV by MIME or extension", () => {
     expect(isWorkOrderMediaTypeAllowed({ name: "a.jpg", type: "image/jpeg" } as File)).toBe(true);
     expect(isWorkOrderMediaTypeAllowed({ name: "a.jpg", type: "image/jpg" } as File)).toBe(true);