If your billing page shows a different cycle than you expected — for example "monthly" when you thought domains were yearly, or a checkout total that's higher than the mailbox price you first saw — this is almost always because mailboxes and domains are billed separately. Here's how it works.
Mailbox plans and domains are billed separately
Your mailbox plan can be billed monthly or yearly, depending on the plan you chose.
Your domains are a yearly registration fee of $12 per domain, per year. This is charged annually and is separate from your mailbox subscription.
Because these are two separate items, your total at checkout includes both the mailbox plan and the domain registration — which is why the total can be higher than the mailbox price shown on its own.
The mailbox subscription fee includes usage, bandwidth, API, MCP, and sending services, ensuring there are no hidden fees.
Why my billing page says "monthly" even though domains are yearly
When your account combines mailboxes and domains, the billing page may label the overall subscription as "monthly" while the domain portion is still a once-a-year registration fee rather than a recurring monthly charge. The way the cycle is displayed does not change the total amount you pay — your domains are still billed as a yearly registration.
When is my next charge?
The "next payment" date on your billing page is your mailbox plan renewal date.
Your domain registration renews once a year on its own renewal date, as long as your subscription stays active.
It's normal to see the mailbox renewal and the domain renewal as separate dates and separate charges.
What's included in my mailbox subscription?
The mailbox subscription covers all essential services, including usage, bandwidth, API, MCP, and sending services.
There are no additional or variable charges for these services, ensuring a transparent pricing structure.
Combining Maildoso SMTP mailboxes and Google Workspace mailboxes on one invoice
If your account has both Maildoso SMTP mailboxes and Google Workspace mailboxes, these are priced differently and can appear as separate line items — or separate charges — on the same billing cycle rather than one blended per-mailbox rate. When comparing your invoice to the price you expected, check which mailboxes are SMTP vs. Google Workspace on your Email accounts page; the per-mailbox cost differs between the two, so a mixed-plan invoice total won't divide evenly across all your mailboxes.
Switching a mailbox between SMTP and Google Workspace before a renewal
If you want to switch mailboxes between SMTP and Google Workspace before your next renewal so the upcoming invoice reflects the new plan type, contact us with your account email and which mailboxes should switch — this isn't a self-serve toggle, since it affects both provisioning and the next invoice's pricing. Doing this ahead of your renewal date avoids being billed once for the old plan and having to adjust afterward.
Quick recap
Mailbox plan: monthly or yearly.
Domains: $12 per domain, per year, billed annually.
Domain registration costs are non-refundable; mailbox plan refunds follow our 30-day new-user guarantee.
The mailbox subscription fee includes usage, bandwidth, API, MCP, and sending services, with no hidden fees.
If your billing still doesn't look right after reading this, contact us and we'll review your specific account and make sure you're charged correctly. Related: How much do SMTP mailboxes cost? Volume pricing tiers · Invoices and receipts · Do you offer monthly plans? · Refunds and cancellations