diff --git a/saas/app/controllers/admin/accounts_controller.rb b/saas/app/controllers/admin/accounts_controller.rb
index ba6200d1b..26a2b9c82 100644
--- a/saas/app/controllers/admin/accounts_controller.rb
+++ b/saas/app/controllers/admin/accounts_controller.rb
@@ -12,7 +12,7 @@ class Admin::AccountsController < AdminController
   end
 
   def update
-    @account.override_limits(card_count: overridden_card_count_param)
+    @account.override_limits(**overridden_limits_params.to_h.symbolize_keys)
     redirect_to saas.edit_admin_account_path(@account.external_account_id), notice: "Account limits updated"
   end
 
@@ -21,7 +21,7 @@ class Admin::AccountsController < AdminController
       @account = Account.find_by!(external_account_id: params[:id])
     end
 
-    def overridden_card_count_param
-      params[:account][:overridden_card_count].to_i
+    def overridden_limits_params
+      params.expect(account: [ :card_count, :bytes_used ])
     end
 end
diff --git a/saas/app/models/account/limited.rb b/saas/app/models/account/limited.rb
index f7eb3cbc1..b185815e4 100644
--- a/saas/app/models/account/limited.rb
+++ b/saas/app/models/account/limited.rb
@@ -6,15 +6,20 @@ module Account::Limited
   end
 
   NEAR_CARD_LIMIT_THRESHOLD = 100
+  NEAR_STORAGE_LIMIT_THRESHOLD = 500.megabytes
 
-  def override_limits(card_count:)
-    (overridden_limits || build_overridden_limits).update!(card_count:)
+  def override_limits(card_count: nil, bytes_used: nil)
+    (overridden_limits || build_overridden_limits).update!(card_count:, bytes_used:)
   end
 
   def billed_cards_count
     overridden_limits&.card_count || cards_count
   end
 
+  def billed_bytes_used
+    overridden_limits&.bytes_used || bytes_used
+  end
+
   def nearing_plan_cards_limit?
     plan.limit_cards? && remaining_cards_count < NEAR_CARD_LIMIT_THRESHOLD
   end
@@ -23,6 +28,22 @@ module Account::Limited
     plan.limit_cards? && billed_cards_count > plan.card_limit
   end
 
+  def nearing_plan_storage_limit?
+    remaining_storage < NEAR_STORAGE_LIMIT_THRESHOLD
+  end
+
+  def exceeding_storage_limit?
+    billed_bytes_used > plan.storage_limit
+  end
+
+  def nearing_limits?
+    nearing_plan_cards_limit? || nearing_plan_storage_limit?
+  end
+
+  def exceeding_limits?
+    exceeding_card_limit? || exceeding_storage_limit?
+  end
+
   def reset_overridden_limits
     overridden_limits&.destroy
     reload_overridden_limits
@@ -32,4 +53,8 @@ module Account::Limited
     def remaining_cards_count
       plan.card_limit - billed_cards_count
     end
+
+    def remaining_storage
+      plan.storage_limit - billed_bytes_used
+    end
 end
diff --git a/saas/app/views/admin/accounts/edit.html.erb b/saas/app/views/admin/accounts/edit.html.erb
index 49c99773d..950ecc761 100644
--- a/saas/app/views/admin/accounts/edit.html.erb
+++ b/saas/app/views/admin/accounts/edit.html.erb
@@ -11,14 +11,21 @@
         <dt class="font-weight-bold">Actual card count:</dt>
         <dd class="margin-inline-start-none"><%= @account.cards_count %></dd>
       </div>
+      <div class="flex gap-half">
+        <dt class="font-weight-bold">Actual bytes used:</dt>
+        <dd class="margin-inline-start-none"><%= storage_to_human_size(@account.bytes_used) %></dd>
+      </div>
     </dl>
 
     <%= form_with model: @account, url: saas.admin_account_path(@account.external_account_id), class: "flex flex-column gap" do |form| %>
-      <div class="flex flex-column gap-half">
-        <%= form.label :overridden_card_count, "Override card count", class: "font-weight-bold" %>
-        <div class="flex align-center gap input input--actor">
-          <%= form.number_field :overridden_card_count, value: @account.overridden_limits&.card_count, class: "input full-width" %>
-        </div>
+      <div class="flex align-center gap-half">
+        <%= form.label :card_count, "Override card count", class: "font-weight-bold" %>
+        <%= form.number_field :card_count, value: @account.overridden_limits&.card_count, class: "input" %>
+      </div>
+
+      <div class="flex align-center gap-half">
+        <%= form.label :bytes_used, "Override bytes used", class: "font-weight-bold" %>
+        <%= form.number_field :bytes_used, value: @account.overridden_limits&.bytes_used, class: "input" %>
       </div>
 
       <button type="submit" class="btn btn--reversed">Save</button>
diff --git a/saas/db/migrate/20251216000000_add_bytes_used_to_account_overridden_limits.rb b/saas/db/migrate/20251216000000_add_bytes_used_to_account_overridden_limits.rb
new file mode 100644
index 000000000..85adad44a
--- /dev/null
+++ b/saas/db/migrate/20251216000000_add_bytes_used_to_account_overridden_limits.rb
@@ -0,0 +1,5 @@
+class AddBytesUsedToAccountOverriddenLimits < ActiveRecord::Migration[8.2]
+  def change
+    add_column :account_overridden_limits, :bytes_used, :bigint
+  end
+end
diff --git a/saas/db/saas_schema.rb b/saas/db/saas_schema.rb
index 59c78f4cb..7e9b80b92 100644
--- a/saas/db/saas_schema.rb
+++ b/saas/db/saas_schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.2].define(version: 2025_12_15_170000) do
+ActiveRecord::Schema[8.2].define(version: 2025_12_16_000000) do
   create_table "account_billing_waivers", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
     t.datetime "created_at", null: false
@@ -20,6 +20,7 @@ ActiveRecord::Schema[8.2].define(version: 2025_12_15_170000) do
 
   create_table "account_overridden_limits", id: :uuid, charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.uuid "account_id", null: false
+    t.bigint "bytes_used"
     t.integer "card_count"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
diff --git a/saas/test/models/account/limited_test.rb b/saas/test/models/account/limited_test.rb
index 335d6a37c..dafca0c31 100644
--- a/saas/test/models/account/limited_test.rb
+++ b/saas/test/models/account/limited_test.rb
@@ -73,4 +73,45 @@ class Account::LimitedTest < ActiveSupport::TestCase
 
     assert account.exceeding_card_limit?
   end
+
+  test "detect nearing storage limit" do
+    # Paid plans have large storage limits
+    accounts(:"37s").update_column(:bytes_used, 4.gigabytes)
+    assert_not accounts(:"37s").nearing_plan_storage_limit?
+
+    # Free plan not near limit
+    accounts(:initech).update_column(:bytes_used, 400.megabytes)
+    assert_not accounts(:initech).nearing_plan_storage_limit?
+
+    # Free plan near limit
+    accounts(:initech).update_column(:bytes_used, 600.megabytes)
+    assert accounts(:initech).nearing_plan_storage_limit?
+  end
+
+  test "detect exceeding storage limit" do
+    # Free plan under limit
+    accounts(:initech).update_column(:bytes_used, 900.megabytes)
+    assert_not accounts(:initech).exceeding_storage_limit?
+
+    # Free plan over limit
+    accounts(:initech).update_column(:bytes_used, 1.1.gigabytes)
+    assert accounts(:initech).exceeding_storage_limit?
+  end
+
+  test "override bytes_used limits" do
+    account = accounts(:initech)
+    account.update_column(:bytes_used, 1.1.gigabytes)
+
+    assert account.exceeding_storage_limit?
+    assert_equal 1.1.gigabytes, account.billed_bytes_used
+
+    account.override_limits bytes_used: 500.megabytes
+    assert_not account.exceeding_storage_limit?
+    assert_equal 500.megabytes, account.billed_bytes_used
+    assert_equal 1.1.gigabytes, account.bytes_used # original unchanged
+
+    account.reset_overridden_limits
+    assert account.exceeding_storage_limit?
+    assert_equal 1.1.gigabytes, account.billed_bytes_used
+  end
 end