diff --git a/src/deploy/functions/args.ts b/src/deploy/functions/args.ts
index ca02fd4874d..91c95f7b268 100644
--- a/src/deploy/functions/args.ts
+++ b/src/deploy/functions/args.ts
@@ -36,6 +36,7 @@ export interface Payload {
 export interface Context {
   projectId: string;
   filters?: deployHelper.EndpointFilter[];
+  filtersExcept?: deployHelper.EndpointFilter[];
 
   // Filled in the "prepare" phase.
   config?: projectConfig.ValidatedConfig;
diff --git a/src/deploy/functions/checkIam.ts b/src/deploy/functions/checkIam.ts
index 211aa1a440c..f44d618293b 100644
--- a/src/deploy/functions/checkIam.ts
+++ b/src/deploy/functions/checkIam.ts
@@ -1,7 +1,10 @@
 import { bold } from "colorette";
 
 import { logger } from "../../logger";
-import { getEndpointFilters, endpointMatchesAnyFilter } from "./functionsDeployHelper";
+import {
+  getEndpointFilters,
+  endpointMatchesDeploymentFilters,
+} from "./functionsDeployHelper";
 import { FirebaseError } from "../../error";
 import { Options } from "../../options";
 import { flattenArray } from "../../functional";
@@ -75,10 +78,12 @@ export async function checkHttpIam(
     return;
   }
   const filters = context.filters || getEndpointFilters(options, context.config!);
+  const excludeFilters =
+    context.filtersExcept || getEndpointFilters(options, context.config!, "except");
   const wantBackends = Object.values(payload.functions).map(({ wantBackend }) => wantBackend);
   const httpEndpoints = [...flattenArray(wantBackends.map((b) => backend.allEndpoints(b)))]
     .filter(backend.isHttpsTriggered)
-    .filter((f) => endpointMatchesAnyFilter(f, filters));
+    .filter((f) => endpointMatchesDeploymentFilters(f, filters, excludeFilters));
 
   const existing = await backend.existingBackend(context);
   const newHttpsEndpoints = httpEndpoints.filter(backend.missingEndpoint(existing));
diff --git a/src/deploy/functions/functionsDeployHelper.spec.ts b/src/deploy/functions/functionsDeployHelper.spec.ts
index 68c33e73d84..7add12d5039 100644
--- a/src/deploy/functions/functionsDeployHelper.spec.ts
+++ b/src/deploy/functions/functionsDeployHelper.spec.ts
@@ -163,6 +163,38 @@ describe("functionsDeployHelper", () => {
     });
   });
 
+  describe("endpointMatchesDeploymentFilters", () => {
+    it("should include functions when no filters provided", () => {
+      const func = { ...ENDPOINT, id: "id" };
+      expect(helper.endpointMatchesDeploymentFilters(func)).to.be.true;
+    });
+
+    it("should include only functions matching include filters", () => {
+      const func = { ...ENDPOINT, id: "match-me" };
+      expect(
+        helper.endpointMatchesDeploymentFilters(func, [
+          { ...BASE_FILTER, idChunks: ["different"] },
+        ]),
+      ).to.be.false;
+      expect(
+        helper.endpointMatchesDeploymentFilters(func, [
+          { ...BASE_FILTER, idChunks: ["match", "me"] },
+        ]),
+      ).to.be.true;
+    });
+
+    it("should exclude functions matching exclude filters", () => {
+      const func = { ...ENDPOINT, id: "blocked-func" };
+      expect(
+        helper.endpointMatchesDeploymentFilters(
+          func,
+          [{ ...BASE_FILTER }],
+          [{ ...BASE_FILTER, idChunks: ["blocked"] }],
+        ),
+      ).to.be.false;
+    });
+  });
+
   describe("parseFunctionSelector", () => {
     interface Testcase {
       desc: string;
@@ -351,6 +383,21 @@ describe("functionsDeployHelper", () => {
       expect(actual?.length).to.equal(1);
       expect(actual).to.deep.equal([{ codebase: DEFAULT_CODEBASE, idChunks: ["other"] }]);
     });
+
+    it("parses filters from the --except option when requested", () => {
+      const config: ValidatedConfig = [
+        { source: "functions", codebase: DEFAULT_CODEBASE },
+        { source: "other-functions", codebase: "other" },
+      ] as ValidatedConfig;
+
+      const options = {
+        except: "functions:other",
+      } as Options;
+
+      const actual = helper.getEndpointFilters(options, config, "except");
+
+      expect(actual).to.deep.equal([{ codebase: "other" }]);
+    });
   });
 
   describe("targetCodebases", () => {
@@ -398,6 +445,32 @@ describe("functionsDeployHelper", () => {
       ];
       expect(helper.targetCodebases(config, filters)).to.have.members(["default", "foobar"]);
     });
+
+    it("excludes codebases specified by exclude filters without id chunks", () => {
+      const excludeFilters: EndpointFilter[] = [
+        {
+          codebase: "foobar",
+        },
+      ];
+
+      expect(helper.targetCodebases(config, undefined, excludeFilters)).to.have.members([
+        "default",
+      ]);
+    });
+
+    it("does not exclude codebases when exclude filters include id chunks", () => {
+      const excludeFilters: EndpointFilter[] = [
+        {
+          codebase: "foobar",
+          idChunks: ["some", "func"],
+        },
+      ];
+
+      expect(helper.targetCodebases(config, undefined, excludeFilters)).to.have.members([
+        "default",
+        "foobar",
+      ]);
+    });
   });
 
   describe("groupEndpointsByCodebase", () => {
diff --git a/src/deploy/functions/functionsDeployHelper.ts b/src/deploy/functions/functionsDeployHelper.ts
index c32d7a1e062..b98c2b93ec6 100644
--- a/src/deploy/functions/functionsDeployHelper.ts
+++ b/src/deploy/functions/functionsDeployHelper.ts
@@ -25,6 +25,23 @@ export function endpointMatchesAnyFilter(
   return filters.some((filter) => endpointMatchesFilter(endpoint, filter));
 }
 
+/**
+ * Returns true if an endpoint should be deployed based on include/exclude filters.
+ *
+ * - If includeFilters is undefined, all endpoints are included by default.
+ * - If excludeFilters is provided and the endpoint matches, it is excluded even if included.
+ */
+export function endpointMatchesDeploymentFilters(
+  endpoint: backend.Endpoint,
+  includeFilters?: EndpointFilter[],
+  excludeFilters?: EndpointFilter[],
+): boolean {
+  if (excludeFilters?.length && endpointMatchesAnyFilter(endpoint, excludeFilters)) {
+    return false;
+  }
+  return endpointMatchesAnyFilter(endpoint, includeFilters);
+}
+
 /**
  * Returns true if endpoint matches the given filter.
  */
@@ -105,14 +122,16 @@ export function parseFunctionSelector(selector: string, config: ValidatedConfig)
  *   If no filter exists, we return undefined which the caller should interpret as "match all functions".
  */
 export function getEndpointFilters(
-  options: { only?: string },
+  options: { only?: string; except?: string },
   config: ValidatedConfig,
+  filterType: "only" | "except" = "only",
 ): EndpointFilter[] | undefined {
-  if (!options.only) {
+  const rawFilters = filterType === "only" ? options.only : options.except;
+  if (!rawFilters) {
     return undefined;
   }
 
-  const selectors = options.only.split(",");
+  const selectors = rawFilters.split(",");
   const filters: EndpointFilter[] = [];
   for (let selector of selectors) {
     if (selector.startsWith("functions:")) {
@@ -155,29 +174,32 @@ export function getFunctionLabel(fn: backend.TargetIds & { codebase?: string }):
 }
 
 /**
- * Returns list of codebases specified in firebase.json filtered by --only filters if present.
+ * Returns list of codebases specified in firebase.json filtered by --only/--except filters if present.
  */
-export function targetCodebases(config: ValidatedConfig, filters?: EndpointFilter[]): string[] {
-  const codebasesFromConfig = [...new Set(Object.values(config).map((c) => c.codebase))];
-  if (!filters) {
-    return [...codebasesFromConfig];
-  }
-
-  const codebasesFromFilters = [
-    ...new Set(filters.map((f) => f.codebase).filter((c) => c !== undefined)),
-  ];
+export function targetCodebases(
+  config: ValidatedConfig,
+  filters?: EndpointFilter[],
+  excludeFilters?: EndpointFilter[],
+): string[] {
+  let targetedCodebases = [...new Set(Object.values(config).map((c) => c.codebase))];
+  if (filters) {
+    const codebasesFromFilters = [
+      ...new Set(filters.map((f) => f.codebase).filter((c) => c !== undefined)),
+    ];
 
-  if (codebasesFromFilters.length === 0) {
-    return [...codebasesFromConfig];
+    if (codebasesFromFilters.length > 0) {
+      targetedCodebases = targetedCodebases.filter((codebase) =>
+        codebasesFromFilters.includes(codebase),
+      );
+    }
   }
 
-  const intersections: string[] = [];
-  for (const codebase of codebasesFromConfig) {
-    if (codebasesFromFilters.includes(codebase)) {
-      intersections.push(codebase);
-    }
+  if (excludeFilters?.length) {
+    targetedCodebases = targetedCodebases.filter(
+      (codebase) => !isCodebaseFiltered(codebase, excludeFilters),
+    );
   }
-  return intersections;
+  return targetedCodebases;
 }
 
 /**
diff --git a/src/deploy/functions/prepare.spec.ts b/src/deploy/functions/prepare.spec.ts
index d0ee5d59f0b..17c79cc5e2c 100644
--- a/src/deploy/functions/prepare.spec.ts
+++ b/src/deploy/functions/prepare.spec.ts
@@ -33,6 +33,7 @@ describe("prepare", () => {
     let sandbox: sinon.SinonSandbox;
     let runtimeDelegateStub: RuntimeDelegate;
     let discoverBuildStub: sinon.SinonStub;
+    let getRuntimeDelegateStub: sinon.SinonStub;
 
     beforeEach(() => {
       sandbox = sinon.createSandbox();
@@ -57,7 +58,9 @@ describe("prepare", () => {
           },
         }),
       );
-      sandbox.stub(runtimes, "getRuntimeDelegate").resolves(runtimeDelegateStub);
+      getRuntimeDelegateStub = sandbox.stub(runtimes, "getRuntimeDelegate").resolves(
+        runtimeDelegateStub,
+      );
     });
 
     afterEach(() => {
@@ -151,6 +154,33 @@ describe("prepare", () => {
       expect(callArgs[0]).to.deep.equal(runtimeConfig);
       expect(callArgs[0]).to.have.property("customKey", "customValue");
     });
+
+    it("should skip codebases filtered out by exclude filters", async () => {
+      const config: ValidatedConfig = [
+        { source: "source", codebase: "keep", runtime: "nodejs22" },
+        { source: "other-source", codebase: "skip-me", runtime: "nodejs22" },
+      ];
+      const options = {
+        config: {
+          path: (p: string) => p,
+        },
+        projectId: "project",
+      } as unknown as Options;
+      const firebaseConfig = { projectId: "project" };
+      const runtimeConfig = {};
+
+      const builds = await prepare.loadCodebases(
+        config,
+        options,
+        firebaseConfig,
+        runtimeConfig,
+        undefined,
+        [{ codebase: "skip-me" }],
+      );
+
+      expect(Object.keys(builds)).to.deep.equal(["keep"]);
+      expect(getRuntimeDelegateStub.calledOnce).to.be.true;
+    });
   });
 
   describe("inferDetailsFromExisting", () => {
diff --git a/src/deploy/functions/prepare.ts b/src/deploy/functions/prepare.ts
index 1ee2e455cb7..6ce33374ba2 100644
--- a/src/deploy/functions/prepare.ts
+++ b/src/deploy/functions/prepare.ts
@@ -25,6 +25,7 @@ import { Options } from "../../options";
 import {
   EndpointFilter,
   endpointMatchesAnyFilter,
+  endpointMatchesDeploymentFilters,
   getEndpointFilters,
   groupEndpointsByCodebase,
   targetCodebases,
@@ -69,10 +70,18 @@ export async function prepare(
 
   context.config = normalizeAndValidate(options.config.src.functions);
   context.filters = getEndpointFilters(options, context.config); // Parse --only filters for functions.
+  context.filtersExcept = getEndpointFilters(options, context.config, "except");
 
-  const codebases = targetCodebases(context.config, context.filters);
+  const codebases = targetCodebases(context.config, context.filters, context.filtersExcept);
   if (codebases.length === 0) {
-    throw new FirebaseError("No function matches given --only filters. Aborting deployment.");
+    if (context.filters?.length) {
+      throw new FirebaseError("No function matches given --only filters. Aborting deployment.");
+    }
+    logLabeledBullet(
+      "functions",
+      "No functions codebases to deploy after applying --except filters, skipping.",
+    );
+    return;
   }
   for (const codebase of codebases) {
     logLabeledBullet("functions", `preparing codebase ${clc.bold(codebase)} for deployment`);
@@ -112,6 +121,7 @@ export async function prepare(
     firebaseConfig,
     runtimeConfig,
     context.filters,
+    context.filtersExcept,
   );
 
   // == Phase 1.5 Prepare extensions found in codebases if any
@@ -266,7 +276,7 @@ export async function prepare(
   // ===Phase 6. Ask for user prompts for things might warrant user attentions.
   // We limit the scope endpoints being deployed.
   const matchingBackend = backend.matchingBackend(wantBackend, (endpoint) => {
-    return endpointMatchesAnyFilter(endpoint, context.filters);
+    return endpointMatchesDeploymentFilters(endpoint, context.filters, context.filtersExcept);
   });
   await promptForFailurePolicies(options, matchingBackend, haveBackend);
   await promptForMinInstances(options, matchingBackend, haveBackend);
@@ -446,8 +456,9 @@ export async function loadCodebases(
   firebaseConfig: args.FirebaseConfig,
   runtimeConfig: Record<string, unknown>,
   filters?: EndpointFilter[],
+  excludeFilters?: EndpointFilter[],
 ): Promise<Record<string, build.Build>> {
-  const codebases = targetCodebases(config, filters);
+  const codebases = targetCodebases(config, filters, excludeFilters);
   const projectId = needProjectId(options);
 
   const wantBuilds: Record<string, build.Build> = {};
diff --git a/src/deploy/functions/release/index.ts b/src/deploy/functions/release/index.ts
index 97705a8cdb2..203ff75fb70 100644
--- a/src/deploy/functions/release/index.ts
+++ b/src/deploy/functions/release/index.ts
@@ -48,6 +48,7 @@ export async function release(
         wantBackend,
         haveBackend,
         filters: context.filters,
+        excludeFilters: context.filtersExcept,
       }),
     };
   }
diff --git a/src/deploy/functions/release/planner.ts b/src/deploy/functions/release/planner.ts
index c125c183bec..2ca2d680de4 100644
--- a/src/deploy/functions/release/planner.ts
+++ b/src/deploy/functions/release/planner.ts
@@ -1,6 +1,6 @@
 import {
   EndpointFilter,
-  endpointMatchesAnyFilter,
+  endpointMatchesDeploymentFilters,
   getFunctionLabel,
 } from "../functionsDeployHelper";
 import { isFirebaseManaged } from "../../../deploymentTool";
@@ -29,6 +29,7 @@ export interface PlanArgs {
   haveBackend: backend.Backend; // the current state
   codebase: string; // target codebase of the deployment
   filters?: EndpointFilter[]; // filters to apply to backend, passed from users by --only flag
+  excludeFilters?: EndpointFilter[]; // filters to exclude from deploy, passed from users by --except flag
   deleteAll?: boolean; // deletes all functions if set
 }
 
@@ -130,14 +131,17 @@ export function calculateUpdate(want: backend.Endpoint, have: backend.Endpoint):
  * Create a plan for deploying all functions in one region.
  */
 export function createDeploymentPlan(args: PlanArgs): DeploymentPlan {
-  let { wantBackend, haveBackend, codebase, filters, deleteAll } = args;
+  let { wantBackend, haveBackend, codebase, filters, excludeFilters, deleteAll } = args;
   let deployment: DeploymentPlan = {};
   wantBackend = backend.matchingBackend(wantBackend, (endpoint) => {
-    return endpointMatchesAnyFilter(endpoint, filters);
+    return endpointMatchesDeploymentFilters(endpoint, filters, excludeFilters);
   });
   const wantedEndpoint = backend.hasEndpoint(wantBackend);
   haveBackend = backend.matchingBackend(haveBackend, (endpoint) => {
-    return wantedEndpoint(endpoint) || endpointMatchesAnyFilter(endpoint, filters);
+    return (
+      wantedEndpoint(endpoint) ||
+      endpointMatchesDeploymentFilters(endpoint, filters, excludeFilters)
+    );
   });
 
   const regions = new Set([