Check overlapping service times before invoicing a job

Start with the fictional example or checked records

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Original fictional calculation · not a customer result

Worked example: the difference to inspect

Fictional entries A and B total 210 minutes on 16 October, but cover only 180 clock minutes because 10:30–11:00 overlaps. Another 60 minutes on 17 October takes summed minutes to 270 and covered clock minutes to 240. The repeated 30 minutes is a review flag; it is not an automatic fee deduction or proof that either record is wrong.

reference,date,start,end
DEMO-A,2026-10-16,09:00,11:00
DEMO-B,2026-10-16,10:30,12:00
DEMO-C,2026-10-17,09:00,10:00

Download fictional input · Download fictional result

Method and explicit boundaries

For each calendar date, add every end−start duration. Sort intervals and merge their union to find covered clock minutes. Summed minus union minutes reveals repeated clock coverage. Report each overlapping pair separately; pairwise overlap totals can double count a triple overlap and must not be added together as the repeated total. Touching boundaries such as 10:00 end / 10:00 start do not overlap.

This checks naive local-clock intervals on one date. It does not convert time zones or calculate elapsed time across daylight-saving changes. Split overnight work and resolve clock-change records from verified timestamps before using this worksheet. Multiple workers and authorised multitasking can overlap legitimately; do not delete records automatically. It does not track attendance, approve timesheets or calculate wages.

Choose the existing template after resolving the result

Compare flagged intervals with the original service log and agreed billing basis. Only after resolving them, enter approved hours or quantities in the original invoice tool. Keep the original time evidence outside the invoice.

• Invoice a completed job
• Consultant invoice template
• Invoice generator Australia

Start without signing in; free use has branding and usage limits. Review any optional membership against real repeat-use needs. Downloading a worksheet is not a successful invoice export.

Checks for different questions

• Check quantities, unit prices and the copied subtotal
• Reconcile entered GST and mixed price bases on a tax invoice
• Compare ordered, completed and already-invoiced quantities

All worked examples and the download pack

Source and review date

Clockify documents overlapping entries and cases where multitasking makes overlap intentional. This manual interval review is independent and does not connect to or modify Clockify. The source establishes a workflow problem, not Australian demand volume.

Read the official/primary source

Reviewed 17 October 2026. Exact Australian long-tail volume, indexing and paid outcomes remain unknown; a vendor document or deployment does not establish them.