diff --git a/apps/web/ce/types/issue-types/issue-property.ts b/apps/web/ce/types/issue-types/issue-property.ts
index 1ef82232c4a..93b19d39b23 100644
--- a/apps/web/ce/types/issue-types/issue-property.ts
+++ b/apps/web/ce/types/issue-types/issue-property.ts
@@ -44,6 +44,22 @@ export type TIssueType = {
   updated_by: string | null;
 };
 
+// A link row enabling a work item type on a specific project (Phase 3).
+// Mirrors ProjectIssueTypeSerializer (fields "__all__" + issue_type_detail).
+export type TProjectIssueType = {
+  id: string;
+  workspace: string;
+  project: string;
+  issue_type: string;
+  issue_type_detail: TIssueType;
+  level: number;
+  is_default: boolean;
+  created_at: string | undefined;
+  updated_at: string | undefined;
+  created_by: string | null;
+  updated_by: string | null;
+};
+
 // An option for a SELECT / MULTI_SELECT property.
 export type TIssuePropertyOption = {
   id: string;
diff --git a/apps/web/core/components/work-item-types/work-item-type-modal.tsx b/apps/web/core/components/work-item-types/work-item-type-modal.tsx
index a7373053fcb..0f828130a57 100644
--- a/apps/web/core/components/work-item-types/work-item-type-modal.tsx
+++ b/apps/web/core/components/work-item-types/work-item-type-modal.tsx
@@ -8,14 +8,15 @@
 // Create / edit modal for a work item type. Mirrors the estimate create modal
 // idioms (react-hook-form + ModalCore + propel Button/Toast).
 
-import { useEffect } from "react";
+import { useEffect, useState } from "react";
 import { observer } from "mobx-react";
 import { Controller, useForm } from "react-hook-form";
 // plane imports
 import { Button } from "@plane/propel/button";
 import { TOAST_TYPE, setToast } from "@plane/propel/toast";
-import { EModalPosition, EModalWidth, Input, ModalCore, TextArea, ToggleSwitch } from "@plane/ui";
+import { Checkbox, EModalPosition, EModalWidth, Input, ModalCore, TextArea, ToggleSwitch } from "@plane/ui";
 // hooks
+import { useProject } from "@/hooks/store/use-project";
 import { useWorkItemTypes } from "@/hooks/store/use-work-item-types";
 // plane web types
 import type { TIssueType } from "@/plane-web/types/issue-types";
@@ -44,10 +45,25 @@ const defaultValues: TWorkItemTypeForm = {
 export const WorkItemTypeModal = observer(function WorkItemTypeModal(props: TWorkItemTypeModalProps) {
   const { workspaceSlug, workItemTypeId, isOpen, handleClose } = props;
   // store hooks
-  const { getWorkItemTypeById, createWorkItemType, updateWorkItemType } = useWorkItemTypes();
+  const {
+    getWorkItemTypeById,
+    createWorkItemType,
+    updateWorkItemType,
+    fetchProjectIssueTypes,
+    linkProjectIssueType,
+    unlinkProjectIssueType,
+  } = useWorkItemTypes();
+  const { workspaceProjectIds, getProjectById } = useProject();
   // derived values
   const workItemType = workItemTypeId ? getWorkItemTypeById(workItemTypeId) : undefined;
   const isEditing = Boolean(workItemTypeId);
+  // project link state: currently-selected project ids, plus a map of
+  // project id -> existing link row id, used to diff and to unlink on save.
+  const [selectedProjectIds, setSelectedProjectIds] = useState<string[]>([]);
+  const [projectLinkMap, setProjectLinkMap] = useState<Record<string, string>>({});
+  // guards submit until the project-link seed fetch below resolves, so saving
+  // mid-fetch can't wipe out existing links the form hasn't loaded yet.
+  const [isLoadingProjectLinks, setIsLoadingProjectLinks] = useState(false);
   // form info
   const {
     control,
@@ -71,8 +87,63 @@ export const WorkItemTypeModal = observer(function WorkItemTypeModal(props: TWor
     }
   }, [isOpen, workItemType, reset]);
 
+  // Seed the project link selection from the backend when editing an existing
+  // type. The list endpoint is project-scoped, so fan out across the workspace's
+  // projects and keep the link row whose issue_type matches this type.
+  useEffect(() => {
+    if (!isOpen) return;
+    setSelectedProjectIds([]);
+    setProjectLinkMap({});
+    if (!isEditing || !workItemTypeId || !workspaceProjectIds) return;
+    let cancelled = false;
+    setIsLoadingProjectLinks(true);
+    (async () => {
+      const results = await Promise.all(
+        workspaceProjectIds.map(async (projectId) => {
+          const links = await fetchProjectIssueTypes(workspaceSlug, projectId);
+          const match = links?.find((link) => link.issue_type === workItemTypeId);
+          return match ? { projectId, linkId: match.id } : undefined;
+        })
+      );
+      if (cancelled) return;
+      const map: Record<string, string> = {};
+      const linkedProjectIds: string[] = [];
+      results.forEach((result) => {
+        if (result) {
+          map[result.projectId] = result.linkId;
+          linkedProjectIds.push(result.projectId);
+        }
+      });
+      setProjectLinkMap(map);
+      setSelectedProjectIds(linkedProjectIds);
+      setIsLoadingProjectLinks(false);
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [isOpen, isEditing, workItemTypeId, workspaceSlug, workspaceProjectIds, fetchProjectIssueTypes]);
+
+  const toggleProject = (projectId: string) => {
+    setSelectedProjectIds((prev) =>
+      prev.includes(projectId) ? prev.filter((id) => id !== projectId) : [...prev, projectId]
+    );
+  };
+
+  const syncProjectLinks = async (targetTypeId: string) => {
+    const original = Object.keys(projectLinkMap);
+    const toLink = selectedProjectIds.filter((id) => !original.includes(id));
+    const toUnlink = original.filter((id) => !selectedProjectIds.includes(id));
+    await Promise.all([
+      ...toLink.map((projectId) => linkProjectIssueType(workspaceSlug, projectId, targetTypeId)),
+      ...toUnlink.map((projectId) => unlinkProjectIssueType(workspaceSlug, projectId, projectLinkMap[projectId])),
+    ]);
+  };
+
   const onClose = () => {
     reset(defaultValues);
+    setSelectedProjectIds([]);
+    setProjectLinkMap({});
+    setIsLoadingProjectLinks(false);
     handleClose();
   };
 
@@ -84,11 +155,14 @@ export const WorkItemTypeModal = observer(function WorkItemTypeModal(props: TWor
         is_epic: formData.is_epic,
         is_active: formData.is_active,
       };
+      let targetTypeId = workItemTypeId;
       if (isEditing && workItemTypeId) {
         await updateWorkItemType(workspaceSlug, workItemTypeId, payload);
       } else {
-        await createWorkItemType(workspaceSlug, payload);
+        const created = await createWorkItemType(workspaceSlug, payload);
+        targetTypeId = created?.id;
       }
+      if (targetTypeId) await syncProjectLinks(targetTypeId);
       setToast({
         type: TOAST_TYPE.SUCCESS,
         title: "Success!",
@@ -160,12 +234,43 @@ export const WorkItemTypeModal = observer(function WorkItemTypeModal(props: TWor
               </div>
             )}
           />
+          <div className="flex flex-col gap-2">
+            <span className="text-body-sm-regular text-secondary">Available in projects</span>
+            <div className="flex max-h-48 flex-col gap-1 overflow-y-auto">
+              {workspaceProjectIds && workspaceProjectIds.length > 0 ? (
+                workspaceProjectIds.map((projectId) => {
+                  const project = getProjectById(projectId);
+                  if (!project) return null;
+                  return (
+                    <label
+                      key={projectId}
+                      className="flex cursor-pointer items-center gap-2 rounded px-1 py-1 hover:bg-layer-1"
+                    >
+                      <Checkbox
+                        checked={selectedProjectIds.includes(projectId)}
+                        onChange={() => toggleProject(projectId)}
+                      />
+                      <span className="text-body-sm-regular text-primary">{project.name}</span>
+                    </label>
+                  );
+                })
+              ) : (
+                <span className="text-body-sm-regular text-tertiary">No projects available.</span>
+              )}
+            </div>
+          </div>
         </div>
         <div className="mt-5 flex items-center justify-end gap-2">
           <Button variant="secondary" size="sm" onClick={onClose} type="button">
             Cancel
           </Button>
-          <Button variant="primary" size="sm" type="submit" loading={isSubmitting}>
+          <Button
+            variant="primary"
+            size="sm"
+            type="submit"
+            loading={isSubmitting}
+            disabled={isLoadingProjectLinks}
+          >
             {isEditing ? "Update" : "Create"}
           </Button>
         </div>
diff --git a/apps/web/core/services/issue-type.service.ts b/apps/web/core/services/issue-type.service.ts
index 470a5b66225..e5f69e5a96e 100644
--- a/apps/web/core/services/issue-type.service.ts
+++ b/apps/web/core/services/issue-type.service.ts
@@ -13,7 +13,12 @@
 
 // plane imports
 import { API_BASE_URL } from "@plane/constants";
-import type { TIssueType, TIssueProperty, TIssuePropertyOption } from "@/plane-web/types/issue-types";
+import type {
+  TIssueType,
+  TIssueProperty,
+  TIssuePropertyOption,
+  TProjectIssueType,
+} from "@/plane-web/types/issue-types";
 // services
 import { APIService } from "@/services/api.service";
 
@@ -181,6 +186,47 @@ export class IssueTypeService extends APIService {
       throw error;
     }
   }
+
+  // ------------------------------------------------ project ↔ type links
+
+  async fetchProjectIssueTypes(
+    workspaceSlug: string,
+    projectId: string
+  ): Promise<TProjectIssueType[] | undefined> {
+    try {
+      const { data } = await this.get(`/api/workspaces/${workspaceSlug}/projects/${projectId}/issue-types/`);
+      return data || undefined;
+    } catch (error) {
+      throw error;
+    }
+  }
+
+  async linkProjectIssueType(
+    workspaceSlug: string,
+    projectId: string,
+    issueTypeId: string
+  ): Promise<TProjectIssueType | undefined> {
+    try {
+      const { data } = await this.post(`/api/workspaces/${workspaceSlug}/projects/${projectId}/issue-types/`, {
+        issue_type_id: issueTypeId,
+      });
+      return data || undefined;
+    } catch (error) {
+      throw error;
+    }
+  }
+
+  async unlinkProjectIssueType(
+    workspaceSlug: string,
+    projectId: string,
+    projectIssueTypeId: string
+  ): Promise<void> {
+    try {
+      await this.delete(`/api/workspaces/${workspaceSlug}/projects/${projectId}/issue-types/${projectIssueTypeId}/`);
+    } catch (error) {
+      throw error;
+    }
+  }
 }
 
 const issueTypeService = new IssueTypeService();
diff --git a/apps/web/core/store/issue-types/work-item-type.store.ts b/apps/web/core/store/issue-types/work-item-type.store.ts
index 88571e7f30b..cfc566b9b4b 100644
--- a/apps/web/core/store/issue-types/work-item-type.store.ts
+++ b/apps/web/core/store/issue-types/work-item-type.store.ts
@@ -13,7 +13,12 @@ import { orderBy, set, unset } from "lodash-es";
 import { action, computed, makeObservable, observable, runInAction } from "mobx";
 import { computedFn } from "mobx-utils";
 // types
-import type { TIssueProperty, TIssuePropertyOption, TIssueType } from "@/plane-web/types/issue-types";
+import type {
+  TIssueProperty,
+  TIssuePropertyOption,
+  TIssueType,
+  TProjectIssueType,
+} from "@/plane-web/types/issue-types";
 // plane web services
 import issueTypeService from "@/services/issue-type.service";
 // plane web store
@@ -85,6 +90,21 @@ export interface IWorkItemTypeStore {
     propertyId: string,
     optionId: string
   ) => Promise<void>;
+  // project link actions (which types a project may use)
+  fetchProjectIssueTypes: (
+    workspaceSlug: string,
+    projectId: string
+  ) => Promise<TProjectIssueType[] | undefined>;
+  linkProjectIssueType: (
+    workspaceSlug: string,
+    projectId: string,
+    workItemTypeId: string
+  ) => Promise<TProjectIssueType | undefined>;
+  unlinkProjectIssueType: (
+    workspaceSlug: string,
+    projectId: string,
+    projectIssueTypeId: string
+  ) => Promise<void>;
 }
 
 export class WorkItemTypeStore implements IWorkItemTypeStore {
@@ -116,6 +136,10 @@ export class WorkItemTypeStore implements IWorkItemTypeStore {
       createOption: action,
       updateOption: action,
       deleteOption: action,
+      // project link actions
+      fetchProjectIssueTypes: action,
+      linkProjectIssueType: action,
+      unlinkProjectIssueType: action,
     });
   }
 
@@ -394,4 +418,57 @@ export class WorkItemTypeStore implements IWorkItemTypeStore {
       throw error;
     }
   };
+
+  // ----------------------------------------------------- project link actions
+  // These rows are project-scoped, not workspace-scoped, so they are not held
+  // in the workItemTypes map; the modal owns the transient link state.
+  /**
+   * @description fetch the work item types enabled on a project
+   */
+  fetchProjectIssueTypes = async (
+    workspaceSlug: string,
+    projectId: string
+  ): Promise<TProjectIssueType[] | undefined> => {
+    try {
+      this.error = undefined;
+      return await issueTypeService.fetchProjectIssueTypes(workspaceSlug, projectId);
+    } catch (error) {
+      this.error = { status: "error", message: "Error fetching project work item types" };
+      throw error;
+    }
+  };
+
+  /**
+   * @description enable a work item type on a project
+   */
+  linkProjectIssueType = async (
+    workspaceSlug: string,
+    projectId: string,
+    workItemTypeId: string
+  ): Promise<TProjectIssueType | undefined> => {
+    try {
+      this.error = undefined;
+      return await issueTypeService.linkProjectIssueType(workspaceSlug, projectId, workItemTypeId);
+    } catch (error) {
+      this.error = { status: "error", message: "Error linking work item type to project" };
+      throw error;
+    }
+  };
+
+  /**
+   * @description disable a work item type on a project
+   */
+  unlinkProjectIssueType = async (
+    workspaceSlug: string,
+    projectId: string,
+    projectIssueTypeId: string
+  ): Promise<void> => {
+    try {
+      this.error = undefined;
+      await issueTypeService.unlinkProjectIssueType(workspaceSlug, projectId, projectIssueTypeId);
+    } catch (error) {
+      this.error = { status: "error", message: "Error unlinking work item type from project" };
+      throw error;
+    }
+  };
 }