Settings → Subscription → Change Plan. Upgrade Startup → Enterprise takes effect immediately (pro-rated charge for the remainder of the current cycle). Downgrade Enterprise → Startup takes effect at your next renewal so you don't lose the 200-mailbox capacity mid-month. Neither change destroys domains or mailboxes.
Upgrading — the mechanics
Upgrading Startup → Enterprise:
- Winnr calculates the price difference (Enterprise price - Startup price).
- Pro-rates that against the days remaining in your current cycle.
- Charges your card for the pro-rated amount.
- Bumps your plan limits (mailboxes 50 → 200, API rate 300 → 500 req/min).
- Enables Enterprise-only features (dedicated IPs, priority support).
Total time from click to Enterprise-enabled: 5-10 seconds.
Downgrading — the mechanics
Downgrading Enterprise → Startup:
- Winnr schedules the downgrade for your next renewal.
- You keep Enterprise pricing and capacity until then.
- At renewal, the new lower price hits your card and limits drop.
You don't get a refund for unused Enterprise capacity — you paid for it, you keep using it through the cycle end.
Add-ons stay independent
Your warming, email-user credits, and dedicated IPs all live on separate Stripe subscription lines. Changing plans doesn't touch them. This is intentional — nobody wants to lose a $180/month dedicated IP because they downgraded the base plan.
What's next
Step-by-step
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1. Open Subscription settings
Settings → Subscription tab.
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2. Click Change Plan
Shows both plans side-by-side with your current one highlighted.
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3. Pick the new plan
Select Startup or Enterprise. Confirmation shows the price difference and effective date.
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4. Confirm
Upgrades charge immediately (pro-rated). Downgrades schedule for next renewal.
Frequently asked questions
What happens to my mailboxes on downgrade?
Nothing, as long as you're within the new plan's cap. Startup gives 50 mailboxes; if you have 60 active when you downgrade, existing ones keep working but you can't create new ones until you're under 50. Winnr never deletes mailboxes on downgrade.
What happens to my domain limit on downgrade?
Your existing domains all keep working. Winnr doesn't downgrade domain caps — if you had 40 domains on Enterprise, you keep the 40-domain cap even after moving to Startup. This is intentional so downgrades don't force you to delete work.
Are add-ons preserved through a plan change?
Yes. Warming, email-user credits, dedicated IPs — all preserved. Each has its own subscription line that survives plan changes.
Can I downgrade after an upgrade?
Yes, any time. Same flow as any downgrade — takes effect at next renewal.
What if I hit a plan cap I didn't know about?
The app blocks the action (e.g., creating a mailbox that would exceed cap) and prompts you to upgrade or buy credits. Nothing is silently broken.