$0.60 per warming mailbox per month. It's never free. When you enable warming, the first month for the newly enabled mailboxes is charged immediately (not prorated). After that, warming renews on the same invoice as your Winnr plan (Startup $69/mo or Enterprise $189/mo), billed for however many mailboxes are warming. Disabling stops the charge from the next cycle. The current cycle isn't refunded automatically, but you can ask support for your most recent month back. Pausing does NOT stop billing: a paused mailbox still counts. If you only use warming (no Winnr plan), it's its own monthly subscription that you can cancel from Settings → Subscription → Cancel Warming Subscription.
The math
Monthly warming cost = (number of mailboxes with warming on) × $0.60
Examples:
- 10 mailboxes → $6 charged when you enable, then $6 per month while they stay on.
- 50 mailboxes, warming continuously → $30 per month.
- 200 mailboxes, warming continuously → $120 per month.
Because enabling charges a full month up front and the subscription renews on its own date, a mailbox enabled late in a cycle is charged once at enable and again at the next renewal if it's still warming then.
What you're paying for
- Sending and receiving warmup email through Winnr's warming network
- Realistic replies and positive engagement signals
- Health score, inbox rate and spam tracking on the Warming page
When warming is worth the cost
Warming is one of the cheapest deliverability improvements available. If warming keeps even a few more of a new mailbox's emails out of spam each day, $0.60 a month has paid for itself.
Warming without a Winnr plan
You can import external mailboxes and warm them without a Startup or Enterprise plan. Warming is then billed on its own monthly subscription at the same $0.60 per mailbox.
To stop it: Settings → Subscription → Cancel Warming Subscription. The subscription ends at the close of the current period, warming keeps running until then, and no further charges are made. Resume from the same place if you change your mind before the period ends.
Reducing warming cost
- Warm new mailboxes, then disable. 2 to 4 weeks per new mailbox, then off. Ongoing warming is optional.
- Skip warming on aged, already-clean mailboxes. Mailboxes that have been sending cleanly for months don't need it.
- Disable, don't pause. Pausing keeps the charge running.
- Bulk-disable when winding down. On the Warming page, filter by tag or domain, select the mailboxes and click Disable. They're excluded from the next cycle.
What's next
Frequently asked questions
Is warming included in my plan?
No. The Startup ($69/mo) and Enterprise ($189/mo) plans include your mailboxes, domains and the inbox. Warming is an optional add-on at $0.60 per mailbox per month.
When am I charged for warming?
At two points. When you enable warming, the first month for those mailboxes is charged right away as a one-off payment. From then on, warming is a line on your regular subscription and renews at the start of each billing cycle for every mailbox that's warming at that point.
Is a mid-cycle enable prorated?
No. Enabling always charges a full month for the newly added mailboxes at the moment you enable, whatever day of the cycle it is.
What if my payment fails when I enable?
Warming isn't turned on. The Enable Warmup dialog shows "Payment failed" with the reason. Update your payment method and try again.
What if I warm for 2 weeks and then turn it off?
The next cycle doesn't include those mailboxes. The current cycle isn't refunded automatically. If you want it back, ask support@winnr.app (see the [refund policy](/help/billing/refunds.html)).
Does pausing warming stop billing?
No. A paused mailbox still counts. Use Disable to stop the charge.
What if I have 100 mailboxes but only warm 20?
You're charged for the 20. Warming is billed per mailbox with warming turned on, not per mailbox you own.
What happens to the charge if I delete a mailbox that's warming?
Deleting the mailbox also stops its warming, and it drops out of the warming count from the next cycle.
I only use warming (no Winnr plan). How do I cancel?
Settings → Subscription → Cancel Warming Subscription. Warming keeps running for every mailbox until the end of your current billing period, then stops, and you are not charged again. You can resume from the same place any time before the period ends. Disabling mailboxes one by one on the Warming page stops warming for those mailboxes immediately instead, and disabling the last one ends the subscription on the spot, so use the Settings button if you want to use up the time you paid for.
Is there a volume discount?
Not on standard billing. If you're warming a very large number of mailboxes continuously, email support@winnr.app.