diff --git a/docs/plans/2026-03-06-dynamic-global-pricing-design.md b/docs/plans/2026-03-06-dynamic-global-pricing-design.md
new file mode 100644
index 00000000..35e2e05d
--- /dev/null
+++ b/docs/plans/2026-03-06-dynamic-global-pricing-design.md
@@ -0,0 +1,224 @@
+# Dynamic Global Pricing Configuration
+
+**Date:** 2026-03-06
+**Status:** Approved
+**Author:** System Design
+
+## Overview
+
+Add superadmin UI to dynamically modify global billing defaults (free device count and price per device) with automatic Stripe Price creation and subscription migration. Update default pricing from $1 to $2/device/month.
+
+## Goals
+
+1. Allow superadmins to change global pricing without code deployment
+2. Automatically create new Stripe Prices and migrate active subscriptions
+3. Update marketing materials to reflect $2/device/month pricing
+4. Maintain per-organization override capability
+5. Provide audit trail and migration reporting
+
+## Design Decisions
+
+### Storage Strategy (Hybrid Approach)
+
+**ApplicationSettings entries:**
+- `default_free_devices` (integer): Number of free devices (default: 10)
+- `default_price_per_device` (string): Price per device/month USD (default: "2.00")
+- `stripe_price_id` (string): Current Stripe Price object ID
+
+**Fallback behavior:**
+- Check ApplicationSettings first
+- Fall back to module attributes if not set
+- Stripe Price ID falls back to env var `STRIPE_PRICE_ID`
+
+### Stripe Integration
+
+**Price changes trigger:**
+1. Create new Stripe Price object at new unit amount
+2. Update `stripe_price_id` in ApplicationSettings
+3. Migrate all active subscriptions to new Price (best-effort)
+4. Report successes/failures
+
+**Migration behavior:**
+- Update subscriptions with `proration_behavior: "none"` (change at next billing cycle)
+- Best-effort: continue on individual failures, report at end
+- Failed migrations logged for manual review
+
+### UI Placement
+
+**Location:** `/admin/organizations` page
+**Component:** "Global Billing Defaults" card at top of organization list
+
+**Workflow:**
+1. Superadmin clicks "Edit Defaults"
+2. Modal shows form with current values
+3. On save → confirmation dialog: "This will update X active subscriptions. Continue?"
+4. After confirmation → updates DB + Stripe + migrates subscriptions
+5. Success message shows migration results (e.g., "Updated 45/47 subscriptions, 2 failed")
+
+### Safety & Audit
+
+**Confirmation dialog:**
+- Shows current values vs new values
+- Shows count of active subscriptions that will be affected
+- Requires explicit confirmation before execution
+
+**Audit logging:**
+- Action: `"global_pricing_updated"`
+- Metadata includes:
+  - Old/new values for free devices and price
+  - Migration results (succeeded/failed counts)
+  - Failed organization IDs and error reasons
+- IP address and superuser ID captured
+
+## Data Model
+
+### New ApplicationSettings Records
+
+```sql
+INSERT INTO application_settings (id, key, value, value_type, description, inserted_at, updated_at)
+VALUES
+  (gen_random_uuid(), 'default_free_devices', '10', 'integer',
+   'Number of free devices included in all subscriptions', NOW(), NOW()),
+  (gen_random_uuid(), 'default_price_per_device', '2.00', 'string',
+   'Price per device per month (USD) after free tier', NOW(), NOW());
+```
+
+Note: `stripe_price_id` will be populated on first price update via admin UI.
+
+### Schema Changes
+
+No schema changes required. Uses existing `application_settings` table.
+
+## Implementation Components
+
+### 1. Billing Module Updates
+
+**New functions:**
+- `default_free_devices/0` - Get from Settings or fallback
+- `default_price_per_device/0` - Get from Settings or fallback
+- `stripe_price_id/0` - Get from Settings or fallback to env var
+- `migrate_all_subscriptions_to_price/1` - Migrate subscriptions with reporting
+
+**Updated functions:**
+- `effective_free_device_count/1` - Use `default_free_devices/0`
+- `effective_price_per_device/1` - Use `default_price_per_device/0`
+
+**Module attribute updates:**
+- Change `@default_price_per_device` from `Decimal.new("1.00")` to `Decimal.new("2.00")`
+
+### 2. StripeClient Updates
+
+**New functions:**
+- `create_price/1` - Create metered billing Price object
+- `update_subscription_price/2` - Switch subscription to new Price
+- `list_active_subscriptions/1` - Paginated list of active subs
+
+**Price creation parameters:**
+- `unit_amount_decimal`: e.g., "2.00" for $2/device/month
+- `recurring.usage_type`: "metered"
+- `recurring.aggregate_usage`: "max" (bill for max devices in period)
+- `billing_scheme`: "per_unit"
+
+### 3. Admin Context
+
+**New function:**
+- `Admin.update_global_pricing/3` - Orchestrates full update
+
+**Flow:**
+1. Validate new values (positive numbers, reasonable ranges)
+2. Get count of active subscriptions for confirmation
+3. If price changed: create new Stripe Price
+4. Update ApplicationSettings
+5. If price changed: migrate subscriptions
+6. Create audit log with results
+7. Return migration report
+
+### 4. Admin LiveView UI
+
+**Location:** `lib/towerops_web/live/admin/org_live/index.ex`
+
+**New components:**
+- Global Defaults card with current values
+- Edit modal with form
+- Confirmation dialog with impact preview
+- Success/error messages with migration results
+
+**Validation:**
+- `default_free_devices`: integer, 1-10000
+- `default_price_per_device`: decimal, 0.01-999.99
+
+### 5. Marketing Updates
+
+**Files to update:**
+- `lib/towerops_web/controllers/page_html/home.html.heex`: Change $3 → $2
+- `lib/towerops_web/controllers/user_registration_html/new.html.heex`: Update copy
+
+## Error Handling
+
+### Partial Migration Failures
+
+**Scenario:** Stripe API fails for some subscriptions
+
+**Behavior:**
+- Continue migrating remaining subscriptions
+- Collect failed org IDs and error messages
+- Return summary: `%{total: 50, succeeded: 48, failed: 2, failures: [...]}`
+- Display warning in UI with failure details
+- Log failures in audit_logs for manual follow-up
+
+**Failed subscriptions:**
+- Remain on old price until manually updated
+- No disruption to billing
+- Superadmin can retry migration or update individually
+
+### Complete Failures
+
+**Scenario:** Stripe Price creation fails
+
+**Behavior:**
+- Abort entire operation
+- Don't update ApplicationSettings
+- Don't migrate any subscriptions
+- Show error message with Stripe error details
+- No audit log created (operation didn't complete)
+
+## Testing Strategy
+
+**Unit tests:**
+- `Billing.default_free_devices/0` with/without ApplicationSetting
+- `Billing.default_price_per_device/0` with/without ApplicationSetting
+- `Billing.migrate_all_subscriptions_to_price/1` with mocked Stripe
+
+**Integration tests:**
+- `StripeClient.create_price/1` (mocked in test)
+- `StripeClient.update_subscription_price/2` (mocked in test)
+- Admin context with full flow (mocked Stripe)
+
+**LiveView tests:**
+- Render Global Defaults card
+- Open edit modal
+- Validation errors
+- Confirmation dialog shows impact
+- Success message with results
+
+## Security Considerations
+
+- Only accessible by superusers (existing `require_superuser` plug)
+- Audit log captures all changes with IP and user ID
+- Confirmation dialog prevents accidental mass updates
+- Rate limiting already applied to `/admin/*` routes (100 req/min)
+
+## Rollout Plan
+
+1. Deploy code with $2 default in module attributes
+2. Run migration to seed ApplicationSettings
+3. Existing orgs continue using per-org overrides or new $2 default
+4. Superadmin can adjust pricing via UI going forward
+5. Marketing pages immediately show $2 pricing
+
+## Future Enhancements
+
+- Volume pricing tiers (e.g., 10% off at 500+ devices)
+- Scheduled price changes (effective date in future)
+- Price change preview/dry-run mode
+- Email notification to affected org owners before price change