Repeat client billing · manual review
Retainer excess-hours billing checker
When a repeat client uses more time than their included allowance, separate the unused balance, total excess and excess already billed. Review only the remaining excess for a possible additional invoice.
Try the invoice tool nowStart the invoice tool without signing in. Free output has branding and usage limits. This calculator is separate from recurring sending, collections, payroll and accounting. Review the current tool before choosing any paid plan for repeat use.
Review inputs and results
The prefilled values are fictional examples. Replace them with verified data, without customer names, contact or payment details. Inputs stay in this page; review again after changing them. No GST is automatically added.
Select Review calculation to inspect the entered values.
Fictional worked example · not a customer case
Check one specific result
A fictional 20-hour allowance has 25 approved hours used. Five hours exceed the allowance; two of those were already invoiced. Three hours remain for review, or AUD240.00 at AUD80/hour. The original fixed retainer fee is not added again.
Method and boundaries
Excess = max(used − included, 0). Remaining excess = excess − previously billed excess. Only remaining excess is multiplied by the entered hourly rate. If previously billed excess exceeds total excess, calculation stops rather than silently producing a negative additional charge.
No rollover, refund, unused-hour expiry, reserved-availability fee or approval is inferred. Start a separate review for each client and period. This is a manual check; ABN Invoice does not automatically track or bill retainer usage.
From a reviewed number to an invoice
- Confirm the actual customer, scope, period and approved charging basis.
- Match each row to source job records; fictional examples are not customer data.
- Download a manual review record if useful; it does not replace original invoices or accounting records.
- Manually enter appropriate AUD line items in the tool, check the preview, then export the PDF or image yourself.
Read the existing workflow guide · Check product capabilities and limits
Questions before invoicing
Does this result create or change an invoice?
No. This page calculates a manual review only. Nothing is sent to an account, saved to an invoice draft or automatically copied into ABN Invoice. Review the agreement and enter an approved customer document yourself.
What exactly does this review assume?
No rollover, refund, unused-hour expiry, reserved-availability fee or approval is inferred. Start a separate review for each client and period. This is a manual check; ABN Invoice does not automatically track or bill retainer usage.
Related reviews
Sources and review date
Sources establish workflow context, not endorsement of ABN Invoice, Australian search volume or paid results. Community reports are unverified user accounts.
Source and fictional arithmetic reviewed 16 October 2026. Invoice-use or payment outcomes from this page have not been measured.