diff --git a/src/app/(dashboard)/dashboard/costs/quota-share/components/QuotaConceptCard.tsx b/src/app/(dashboard)/dashboard/costs/quota-share/components/QuotaConceptCard.tsx
index eadae5ca44..33696fbd1d 100644
--- a/src/app/(dashboard)/dashboard/costs/quota-share/components/QuotaConceptCard.tsx
+++ b/src/app/(dashboard)/dashboard/costs/quota-share/components/QuotaConceptCard.tsx
@@ -33,6 +33,16 @@ export default function QuotaConceptCard() {
             <ConceptItem icon="trending_up" text={t("conceptBorrowing")} />
             <ConceptItem icon="lock" text={t("conceptGlobalCap")} />
             <ConceptItem icon="schedule" text={t("conceptWindows")} />
+            <ConceptItemWithDesc
+              icon="vpn_key"
+              title={t("conceptKeyHowTitle")}
+              desc={t("conceptKeyHowDesc")}
+            />
+            <ConceptItemWithDesc
+              icon="block"
+              title={t("conceptExclusiveTitle")}
+              desc={t("conceptExclusiveDesc")}
+            />
           </div>
         </div>
       )}
@@ -50,3 +60,17 @@ function ConceptItem({ icon, text }: { icon: string; text: string }) {
     </div>
   );
 }
+
+function ConceptItemWithDesc({ icon, title, desc }: { icon: string; title: string; desc: string }) {
+  return (
+    <div className="flex items-start gap-1.5 rounded-md bg-bg-subtle/40 p-2">
+      <span className="material-symbols-outlined text-[16px] text-primary shrink-0 mt-0.5">
+        {icon}
+      </span>
+      <div className="flex flex-col gap-0.5">
+        <span className="font-semibold text-text-main">{title}</span>
+        <span className="text-text-muted">{desc}</span>
+      </div>
+    </div>
+  );
+}
diff --git a/src/i18n/messages/en.json b/src/i18n/messages/en.json
index 4e3bcd5e88..e8302601d5 100644
--- a/src/i18n/messages/en.json
+++ b/src/i18n/messages/en.json
@@ -7855,6 +7855,10 @@
     "conceptBorrowing": "Borrowing: keys can consume free balance from others without breaching the cap",
     "conceptGlobalCap": "Hard global cap: the provider's absolute limit is never exceeded",
     "conceptWindows": "Windows: 5h, hourly, daily, weekly, monthly — each tracked independently",
+    "conceptKeyHowTitle": "Enabling a key for quota",
+    "conceptKeyHowDesc": "Create the key normally in the API Manager — it appears in the wizard's key step automatically. Tick Exclusive there to make it quota-only. No separate enable step.",
+    "conceptExclusiveTitle": "What \"Exclusive\" does",
+    "conceptExclusiveDesc": "An exclusive key only sees/uses the pool's quotaShared-* models — every other model is hidden from its /v1/models and blocked.",
     "burnRateTitle": "Burn rate",
     "burnRateExhaustsIn": "Exhausts in",
     "dimensionResetIn": "Resets in",
diff --git a/src/i18n/messages/pt-BR.json b/src/i18n/messages/pt-BR.json
index 5f04ca5e3d..32d5274cee 100644
--- a/src/i18n/messages/pt-BR.json
+++ b/src/i18n/messages/pt-BR.json
@@ -5365,6 +5365,10 @@
     "conceptBorrowing": "Empréstimo: keys podem usar saldo livre de outras sem ultrapassar o teto",
     "conceptGlobalCap": "Teto intransponível: o cap absoluto do provider nunca é excedido",
     "conceptWindows": "Janelas: 5h, horária, diária, semanal, mensal — cada uma rastreada independentemente",
+    "conceptKeyHowTitle": "Habilitando uma key para cota",
+    "conceptKeyHowDesc": "Crie a key normalmente no Gerenciador de APIs — ela aparece automaticamente na etapa de keys do wizard. Marque Exclusiva lá para torná-la somente-cota. Não há etapa de ativação separada.",
+    "conceptExclusiveTitle": "O que \"Exclusiva\" faz",
+    "conceptExclusiveDesc": "Uma key exclusiva enxerga/usa apenas os modelos quotaShared-* do pool — todos os outros modelos ficam ocultos no seu /v1/models e bloqueados.",
     "burnRateTitle": "Taxa de consumo",
     "burnRateExhaustsIn": "Esgota em",
     "dimensionResetIn": "Reset em",
diff --git a/tests/unit/quota-concept-card-i18n.test.ts b/tests/unit/quota-concept-card-i18n.test.ts
new file mode 100644
index 0000000000..024716f0fd
--- /dev/null
+++ b/tests/unit/quota-concept-card-i18n.test.ts
@@ -0,0 +1,12 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import en from "../../src/i18n/messages/en.json" with { type: "json" };
+import pt from "../../src/i18n/messages/pt-BR.json" with { type: "json" };
+
+const KEYS = ["conceptKeyHowTitle","conceptKeyHowDesc","conceptExclusiveTitle","conceptExclusiveDesc"];
+test("explanatory card i18n keys exist + parity", () => {
+  for (const k of KEYS) {
+    assert.equal(typeof (en as any).quotaShare[k], "string", `en missing ${k}`);
+    assert.equal(typeof (pt as any).quotaShare[k], "string", `pt missing ${k}`);
+  }
+});