Repeat client billing · manual review
Service-fee calendar-day proration checker
A fixed service fee for part of a billing period needs a clear denominator. Use the actual entered period and covered service dates to review a calendar-day allocation before preparing an 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 full October fee is AUD310.00. Coverage from 16–31 October includes 16 of the period’s 31 days, producing AUD160.00. Do not substitute 30 days for October unless your actual agreement uses a fixed-day convention.
Method and boundaries
Prorated amount = full-period fee × included service days ÷ included billing-period days, rounded once to cents. Both start and end dates are included. The covered range must fit inside the period. This accepts an explicit period rather than guessing the month from an invoice date.
Daily allocation is only one possible contract basis. There is no automatic refund, credit, new subscription, cancellation entitlement or tax calculation. A payroll day, business day, elapsed second or prepaid-hour allocation uses different inputs.
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?
Daily allocation is only one possible contract basis. There is no automatic refund, credit, new subscription, cancellation entitlement or tax calculation. A payroll day, business day, elapsed second or prepaid-hour allocation uses different inputs.
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.