Simbase runs on a prepaid balance, there are no monthly contracts or minimums. You add funds, Simbase deducts usage, and as long as your balance stays positive your SIMs keep working. This guide covers the one-time billing setup, the three ways to add balance, the alerts that warn you before service stops, and where to find your invoices.
In the dashboard, open Billing → Billing Settings
Enter your billing entity, address, tax ID, and any details required for invoicing in your country
Save
These details print on every invoice Simbase issues you, so make sure they match what your finance team expects.
You have three ways to fund your account:
Credit card - best for one-off top-ups and small accounts. Instant. See accepted cards by currency
Invoice / bank transfer - best for larger top-ups and finance-managed accounts. Funds appear after the transfer settles
Auto-recharge - best for production fleets, or anyone who hates surprises. Automatically tops up to an amount you set when the balance drops below a threshold you define
To add balance, open Billing → Add balance in the dashboard and pick your method.
For accepted card brands, supported currencies, and tax handling, see Payment methods.
Simbase sends two alerts so service interruptions don't catch you out:
Low-balance alert - fires when your balance falls below the equivalent of 5 USD/EUR/GBP/AUD/CAD (depending on your account currency). You get an email and an in-app notification
Empty-balance alert - fires when the balance hits 0. Email and in-app, and all SIMs on the account are disabled at this point
Once a SIM is disabled for empty balance, service resumes within minutes of you adding funds. No need to re-enable your SIMs.
If you can't risk service interruption (production telematics, paying customers, lone-worker safety), enable auto-recharge:
Open Billing → Auto-recharge
Set the trigger (top up when the balance drops below X)
Set the amount to top up to
Choose the saved card to charge
Save
You'll still receive low-balance alerts as a heads-up, but the recharge fires automatically.
Simbase issues one invoice per top-up, regardless of payment method. There's no monthly cycle.
To download an invoice:
Open Billing → Invoices
Click the invoice you want
Use the download icon for a PDF
Usage charges deducted from your balance:
Data - by the MB, per the plan attached to each SIM
SMS - per message sent and received, where applicable
Public IPs - daily fee per assigned IP, including for SIMs whose status is currently disabled
Enabled SIMs - daily fee per enabled SIM, on all pay-as-you-go profiles
Green profile SIMs are prepaid: you pay upfront for the bundle, so no daily fee applies. Every other profile is pay-as-you-go and charges a daily fee per enabled SIM.
Private Networks and IPSec tunnels - daily fee per network and per tunnel
Add-Ons - Support plans, Private APNs, Wholesale Pricing plan
For the full list and current rates, see Billable items.
All SIMs on the account are blocked at zero balance. Service resumes within minutes of adding funds, and you don't need to re-enable your SIMs manually.
Yes. You get a low-balance alert by email and in-app when your balance falls below the equivalent of 5 USD/EUR/GBP/AUD/CAD, and an empty-balance alert when it reaches zero.
Enable auto-recharge in the dashboard. It charges a saved card automatically whenever your balance drops below a threshold you set, so the balance never reaches zero.
Yes, the minimum varies by currency and payment method. The dashboard shows the minimum at the moment you select a method.


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