diff --git a/README.md b/README.md
index 39750c1..7196b66 100644
--- a/README.md
+++ b/README.md
@@ -281,7 +281,7 @@ General API:
 - Permissions listing – [`general/permissions.ts`](examples/general/permissions.ts)
 - Users listing – [`general/account-accesses.ts`](examples/general/account-accesses.ts)
 - API tokens CRUD & reset – [`general/api-tokens.ts`](examples/general/api-tokens.ts)
-- Sub-accounts (list & create) – [`sub-accounts/everything.ts`](examples/sub-accounts/everything.ts)
+- Sub-accounts (list, create & delete) – [`sub-accounts/everything.ts`](examples/sub-accounts/everything.ts)
 
 ## Contributing
 
diff --git a/examples/sub-accounts/everything.ts b/examples/sub-accounts/everything.ts
index a29992c..0170390 100644
--- a/examples/sub-accounts/everything.ts
+++ b/examples/sub-accounts/everything.ts
@@ -22,6 +22,12 @@ async function subAccountsFlow() {
       name: "Acme Marketing",
     });
     console.log("Created sub account:", JSON.stringify(created, null, 2));
+
+    // Delete the sub account created above. Permanent – removes all of its
+    // data; deleting the organization's last sub account deletes the
+    // organization as well.
+    await subAccountsClient.delete(created.id);
+    console.log("Deleted sub account:", created.id);
   } catch (error) {
     console.error("Error in subAccountsFlow:", error instanceof Error ? error.message : String(error));
   }
diff --git a/src/__tests__/lib/api/Organizations.test.ts b/src/__tests__/lib/api/Organizations.test.ts
index c32a445..8282bf7 100644
--- a/src/__tests__/lib/api/Organizations.test.ts
+++ b/src/__tests__/lib/api/Organizations.test.ts
@@ -12,6 +12,7 @@ describe("lib/api/Organizations: ", () => {
         expect(organizationsAPI).toHaveProperty("subAccounts");
         expect(typeof organizationsAPI.subAccounts.getList).toBe("function");
         expect(typeof organizationsAPI.subAccounts.create).toBe("function");
+        expect(typeof organizationsAPI.subAccounts.delete).toBe("function");
       });
     });
   });
diff --git a/src/__tests__/lib/api/resources/SubAccounts.test.ts b/src/__tests__/lib/api/resources/SubAccounts.test.ts
index 00bdddb..fa144fb 100644
--- a/src/__tests__/lib/api/resources/SubAccounts.test.ts
+++ b/src/__tests__/lib/api/resources/SubAccounts.test.ts
@@ -20,6 +20,7 @@ describe("lib/api/resources/SubAccounts: ", () => {
       it("initializes with all necessary params.", () => {
         expect(subAccountsAPI).toHaveProperty("getList");
         expect(subAccountsAPI).toHaveProperty("create");
+        expect(subAccountsAPI).toHaveProperty("delete");
       });
     });
   });
@@ -108,4 +109,35 @@ describe("lib/api/resources/SubAccounts: ", () => {
       }
     });
   });
+
+  describe("delete(): ", () => {
+    const subAccountId = 12347;
+    const endpoint = `${GENERAL_ENDPOINT}/api/organizations/${organizationId}/sub_accounts/${subAccountId}`;
+
+    it("deletes a sub account, returning nothing (204 No Content).", async () => {
+      expect.assertions(2);
+
+      mock.onDelete(endpoint).reply(204);
+      const result = await subAccountsAPI.delete(subAccountId);
+
+      expect(mock.history.delete[0].url).toEqual(endpoint);
+      expect(result).toBeUndefined();
+    });
+
+    it("fails with error.", async () => {
+      const expectedErrorMessage = "Request failed with status code 404";
+
+      expect.assertions(2);
+
+      try {
+        await subAccountsAPI.delete(subAccountId);
+      } catch (error) {
+        expect(error).toBeInstanceOf(MailtrapError);
+
+        if (error instanceof MailtrapError) {
+          expect(error.message).toEqual(expectedErrorMessage);
+        }
+      }
+    });
+  });
 });
diff --git a/src/lib/api/resources/SubAccounts.ts b/src/lib/api/resources/SubAccounts.ts
index da5bb57..1cea0cf 100644
--- a/src/lib/api/resources/SubAccounts.ts
+++ b/src/lib/api/resources/SubAccounts.ts
@@ -3,6 +3,7 @@ import { AxiosInstance } from "axios";
 import CONFIG from "../../../config";
 import {
   CreateSubAccountParams,
+  DeleteSubAccountResponse,
   SubAccount,
 } from "../../../types/api/sub-accounts";
 
@@ -39,4 +40,20 @@ export default class SubAccountsApi {
 
     return this.client.post<SubAccount, SubAccount>(url, data);
   }
+
+  /**
+   * Delete a sub account by ID. Requires sub-account management permissions
+   * for the organization. The deletion is permanent and removes all sub-account
+   * data; deleting the organization's last sub account deletes the organization
+   * as well. A repeated call for the same ID fails with `404`. Rate limited to
+   * 10 requests per minute per organization. Returns nothing (204 No Content).
+   */
+  public async delete(subAccountId: number) {
+    const url = `${this.subAccountsURL}/${subAccountId}`;
+
+    return this.client.delete<
+      DeleteSubAccountResponse,
+      DeleteSubAccountResponse
+    >(url);
+  }
 }
diff --git a/src/types/api/sub-accounts.ts b/src/types/api/sub-accounts.ts
index 83e7a7d..a28b73d 100644
--- a/src/types/api/sub-accounts.ts
+++ b/src/types/api/sub-accounts.ts
@@ -6,3 +6,6 @@ export type SubAccount = {
 export type CreateSubAccountParams = {
   name: string;
 };
+
+/** Delete returns `204 No Content` – there is no response body. */
+export type DeleteSubAccountResponse = void;