Updated: 4 November 2026 · Applies to: Ucartz client area (WHMCS 9)
To pay an invoice with the credit in your Ucartz account, open the unpaid invoice under Billing › My Invoices. When you have credit, the invoice shows "Your credit balance is ..." with a box to enter the amount; enter it and click Apply Credit. Credit is not taken automatically when a new invoice is created, so apply it yourself (or ask us in a ticket).
Apply credit to an invoice
- Log in to the Ucartz client area at https://www.ucartz.com/clients/.
- Open Billing › My Invoices and click the unpaid invoice.
- Under "Your credit balance is", the field Enter the amount to apply is filled in for you. Change it if you want to use only part of the credit.
- Click Apply Credit. The invoice total goes down by that amount.
- If the credit covered the whole invoice, it is marked paid and the renewal or order goes ahead. If not, pay the rest with any payment method on the invoice.
Credit works on any invoice in your account: renewals, new orders, upgrades and domain registrations or renewals.
Where credit comes from
- Add Funds: you can top up your account in advance at Add Funds. The page shows your Available Credit Balance and the minimum and maximum amounts you can add.
- Downgrades: when you move to a smaller plan, the unused value of the bigger plan can be added as credit.
- Payments we return as credit: for example a duplicate payment or an automatic payment for a cancelled service, after we check it in a ticket. See Why am I charged again after cancelling a service.
See your balance
Your Available Credit Balance is shown on the Add Funds page and on every unpaid invoice ("Your credit balance is"). Credit is held in your account's currency.
Credit and automatic payments
If a PayPal subscription or a saved card pays your invoices automatically, it can pay a renewal invoice before you apply credit to it. To use your credit first, cancel the PayPal subscription (see How to Cancel a Recurring Payment in PayPal) or remove the saved card under Billing › Payment Methods, then apply the credit when the invoice appears. If an invoice ends up paid twice, open a ticket and we will check it.
Common questions
Can credit be used automatically for every renewal?
Not by itself. Renewal invoices are created about a week before the due date; apply your credit to each one, or open a ticket and ask us to apply it.
Can I withdraw credit or move it to another account?
Open a ticket from Support › Open Ticket and tell us what you need. Refunds follow our Terms of Service.
I applied too much credit by mistake. Can it be undone?
Yes, ask us in a ticket. We can return applied credit from an unpaid invoice to your balance.
