diff --git a/server/tests/unit/shared/getPriceStripeReuseLevel.test.ts b/server/tests/unit/shared/getPriceStripeReuseLevel.test.ts
index b4861bb47..745543b75 100644
--- a/server/tests/unit/shared/getPriceStripeReuseLevel.test.ts
+++ b/server/tests/unit/shared/getPriceStripeReuseLevel.test.ts
@@ -132,6 +132,41 @@ describe("getPriceStripeReuseLevel", () => {
 		expect(level).toBe("none");
 	});
 
+	test("returns full when both usage prices share configs and lack paired entitlements", () => {
+		const orphan = usagePrice({ id: "pr_orphan", entitlement_id: null });
+		const orphanNew = usagePrice({ id: "pr_orphan_new", entitlement_id: null });
+
+		const level = getPriceStripeReuseLevel({
+			newPrice: orphanNew,
+			candidatePrice: orphan,
+			newEntitlements: [],
+			candidateEntitlements: [],
+		});
+
+		expect(level).toBe("full");
+	});
+
+	test("returns stripeProductOnly when both usage prices lack entitlements but configs differ", () => {
+		const cheaper = usagePrice({
+			id: "pr_orphan_cheaper",
+			entitlement_id: null,
+			config: {
+				...usageConfig,
+				usage_tiers: [{ amount: 0.05, to: TierInfinite }],
+			},
+		});
+		const original = usagePrice({ id: "pr_orphan", entitlement_id: null });
+
+		const level = getPriceStripeReuseLevel({
+			newPrice: cheaper,
+			candidatePrice: original,
+			newEntitlements: [],
+			candidateEntitlements: [],
+		});
+
+		expect(level).toBe("stripeProductOnly");
+	});
+
 	test("returns full for matching fixed prices regardless of paired entitlements", () => {
 		const fixed: Price = {
 			id: "pr_base",
diff --git a/shared/utils/productUtils/priceUtils/match/getPriceStripeReuseLevel.ts b/shared/utils/productUtils/priceUtils/match/getPriceStripeReuseLevel.ts
index 0c04b351e..bdd014d29 100644
--- a/shared/utils/productUtils/priceUtils/match/getPriceStripeReuseLevel.ts
+++ b/shared/utils/productUtils/priceUtils/match/getPriceStripeReuseLevel.ts
@@ -77,6 +77,8 @@ export const getPriceStripeReuseLevel = ({
 			entitlements: candidateEntitlements,
 		});
 
+		// Both null = same (null) entity scope; both have ents = compare them.
+		if (!newEnt && !candidateEnt) return "full";
 		if (!newEnt || !candidateEnt) return "none";
 		if (entsAreSame(candidateEnt, newEnt)) return "full";
 	}
@@ -98,6 +100,7 @@ export const getPriceStripeReuseLevel = ({
 		entitlements: candidateEntitlements,
 	});
 
+	if (!newEnt && !candidateEnt) return "stripeProductOnly";
 	if (!newEnt || !candidateEnt) return "none";
 	if (newEnt.entity_feature_id !== candidateEnt.entity_feature_id) {
 		return "none";