diff --git a/packages/ee/server-only/stripe/sync-stripe-customer-subscription.ts b/packages/ee/server-only/stripe/sync-stripe-customer-subscription.ts
index 4bf327282..2a9502e4e 100644
--- a/packages/ee/server-only/stripe/sync-stripe-customer-subscription.ts
+++ b/packages/ee/server-only/stripe/sync-stripe-customer-subscription.ts
@@ -235,7 +235,7 @@ const handleLiveSubscription = async ({
   // the freshly-fetched one — the convergent equivalent of the old
   // `previous_attributes.current_period_start` signal. On renewal, reconcile
   // the seat quantity and claim down to the actual member count. The reconcile
-  // itself no-ops for non-seat/unlimited plans and non-ACTIVE subscriptions.
+  // itself no-ops for non-seat/unlimited plans and inactive subscriptions.
   const previousPeriodEnd = organisation.subscription?.periodEnd ?? null;
 
   const hasPeriodAdvanced = previousPeriodEnd !== null && periodEnd.getTime() > previousPeriodEnd.getTime();
diff --git a/packages/ee/server-only/stripe/update-subscription-item-quantity.ts b/packages/ee/server-only/stripe/update-subscription-item-quantity.ts
index 0880a3a5a..1183e0d35 100644
--- a/packages/ee/server-only/stripe/update-subscription-item-quantity.ts
+++ b/packages/ee/server-only/stripe/update-subscription-item-quantity.ts
@@ -3,6 +3,7 @@ import { stripe } from '@documenso/lib/server-only/stripe';
 import { appLog } from '@documenso/lib/utils/debugger';
 import { prisma } from '@documenso/prisma';
 import type { OrganisationClaim, Subscription } from '@prisma/client';
+import { SubscriptionStatus } from '@prisma/client';
 import type Stripe from 'stripe';
 
 import { isPriceSeatsBased } from './is-price-seats-based';
@@ -138,9 +139,10 @@ export const syncMemberCountWithStripeSeatPlan = async (
     prorationBehaviour: billsForNewSeats ? 'always_invoice' : 'none',
   });
 
-  // Advance the high-water mark when billing for new seats reset it to the
-  // actual count on reconcile. Re-adds and shrinks deliberately leave it so a
-  // seat already paid for this period is never re-charged.
+  // Advance the high-water mark when billing for new seats; it is reset to the
+  // actual member count when the billing period rolls over. Re-adds and shrinks
+  // deliberately leave it untouched so a seat already paid for this period is
+  // never re-charged.
   if (billsForNewSeats) {
     await prisma.organisationClaim.update({
       where: {
@@ -180,6 +182,12 @@ export const reconcileSeatBasedPlans = async (organisationId: string) => {
 
   const { subscription, organisationClaim } = organisation;
 
+  // Stripe rejects quantity updates on canceled subscriptions. PAST_DUE is
+  // still live and a no-proration sync is safe, so it's allowed through.
+  if (subscription.status === SubscriptionStatus.INACTIVE) {
+    return;
+  }
+
   // Unlimited seats — nothing to meter.
   if (organisationClaim.memberCount === 0) {
     return;
diff --git a/packages/lib/jobs/definitions/internal/sync-organisation-seats.ts b/packages/lib/jobs/definitions/internal/sync-organisation-seats.ts
index 432f559be..7ff4b6629 100644
--- a/packages/lib/jobs/definitions/internal/sync-organisation-seats.ts
+++ b/packages/lib/jobs/definitions/internal/sync-organisation-seats.ts
@@ -2,7 +2,7 @@ import { z } from 'zod';
 
 import type { JobDefinition } from '../../client/_internal/job';
 
-const SYNC_ORGANISATION_SEATS_JOB_DEFINITION_ID = 'sync.organisation-seats';
+const SYNC_ORGANISATION_SEATS_JOB_DEFINITION_ID = 'internal.sync-organisation-seats';
 
 const SYNC_ORGANISATION_SEATS_JOB_DEFINITION_SCHEMA = z.object({
   organisationId: z.string(),
diff --git a/packages/trpc/server/admin-router/delete-organisation-member.ts b/packages/trpc/server/admin-router/delete-organisation-member.ts
index eace66acf..df66ac024 100644
--- a/packages/trpc/server/admin-router/delete-organisation-member.ts
+++ b/packages/trpc/server/admin-router/delete-organisation-member.ts
@@ -92,7 +92,7 @@ export const deleteAdminOrganisationMemberRoute = adminProcedure
     // A member was removed — queue a seat sync to true the Stripe quantity down
     // to the new count (no proration, no credit).
     await jobs.triggerJob({
-      name: 'sync.organisation-seats',
+      name: 'internal.sync-organisation-seats',
       payload: { organisationId },
     });
 
diff --git a/packages/trpc/server/organisation-router/delete-organisation-members.ts b/packages/trpc/server/organisation-router/delete-organisation-members.ts
index 2b5d317a2..6a436ddff 100644
--- a/packages/trpc/server/organisation-router/delete-organisation-members.ts
+++ b/packages/trpc/server/organisation-router/delete-organisation-members.ts
@@ -165,7 +165,7 @@ export const deleteOrganisationMembers = async ({
   // Members were removed — queue a seat sync to true the Stripe quantity down to
   // the new count (no proration, no credit).
   await jobs.triggerJob({
-    name: 'sync.organisation-seats',
+    name: 'internal.sync-organisation-seats',
     payload: { organisationId },
   });
 
diff --git a/packages/trpc/server/organisation-router/leave-organisation.ts b/packages/trpc/server/organisation-router/leave-organisation.ts
index 0a20a1492..466870f41 100644
--- a/packages/trpc/server/organisation-router/leave-organisation.ts
+++ b/packages/trpc/server/organisation-router/leave-organisation.ts
@@ -76,7 +76,7 @@ export const leaveOrganisationRoute = authenticatedProcedure
     // A member was removed — queue a seat sync to true the Stripe quantity down
     // to the new count (no proration, no credit).
     await jobs.triggerJob({
-      name: 'sync.organisation-seats',
+      name: 'internal.sync-organisation-seats',
       payload: { organisationId },
     });