The job to finish
Sole traders and small service teams estimating a customer project before quoting can move from work completed to invoice sent without starting from a blank template.
project cost billable hours calculator
Calculate project labour, expenses, contingency and billable total
Calculate labour from people, hours and hourly rate, then add materials, expenses and contingency before GST.
Build a transparent project estimate, confirm the scope with the customer, then create the quote or invoice from actual agreed items.
Project estimate
Billable hours, materials, expenses and contingency
The result is an estimate before GST.
Total billable hours0
Labour subtotal$0.00
Direct subtotal$0.00
Contingency$0.00
Project total before GST$0.00
An estimate does not authorise scope changes or prove a debt. Quotes and invoices must follow the real agreement and approved work.
From calculation to real customer billing
Project numbers ready? Build the quote line by line
Enter the real business, customer, service, GST or no-GST, amount and payment facts, then check the customer document in the live preview.
Start in Quote mode, show labour and materials clearly, then create the actual Invoice from the approved scope and payment terms.
Quick answer
How do I calculate billable project cost?
Multiply people by billable hours per person and the hourly rate, add materials and other direct expenses, then apply any disclosed contingency. Add GST separately only when it applies.
Fast-start promise
What you can do immediately
- The calculator performs the stated task in the browser
- The formula, version and exclusions are visible beside the result
- A tracked ABN Invoice handoff follows only when a genuine customer charge exists
Related invoice tools
Continue with the closest invoice workflow
These links are selected for this page's task, so the next checker, example, template, or generator stays relevant to the invoice you are making.
ATO-guided fields
Invoice compliance checks without heavy software
Check ABN, GST, no-GST, tax invoice fields, due dates, invoice numbers, and payment details against practical Australian invoice requirements.
Source-grounded notes
What this page is grounded on
- Every monetary output is traceable to visible inputs.
- The total excludes GST so supply classification remains explicit.
- The estimate does not authorise scope changes or prove a customer debt.
Key facts
What to know before choosing this workflow
These short facts are visible to readers and summarize the page without implying ATO approval, tax advice, or accounting software replacement.
- Labour
- People × hours each × hourly rate.
- Direct subtotal
- Labour + materials + other expenses.
- Contingency
- Selected percentage of the direct subtotal.
- Output
- Estimated project price before GST.
What you enter
- People and billable hours
- Materials and other expenses
- Contingency and pre-GST total
What you leave with
Export PDF or image files, save history, mark invoices sent or paid, and use archive tools when records need to be handed to an accountant.
Why this workflow exists
Build a transparent project estimate, confirm the scope with the customer, then create the quote or invoice from actual agreed items.
ABN Invoice keeps the document workflow focused: business details, customer details, line items, GST or no-GST treatment, payment details, preview, export, and history. It is built for practical Australian invoicing records rather than a heavy accounting setup.
ABN Invoice is a document creation tool. It does not provide tax, accounting, legal, or financial advice. Check official guidance or your adviser when obligations are unclear.
Best fit for this search
How this calculator works
The calculator builds a pre-GST estimate from visible labour and direct-cost inputs, then applies the chosen contingency percentage to that subtotal.
- No hidden hourly multiplier
- Costs remain itemised
- Contingency shown separately
What the result does and does not mean
An estimate can differ from actual work. Scope changes, subcontractors, travel, rework, discounts and overhead must be handled in the customer agreement and final document.
- Define scope and exclusions
- Record approved variations
- Invoice actual agreed work
Turn a genuine customer amount into an invoice
ABN Invoice can turn the approved labour, materials and services into separate line items, with Quote mode before work and Invoice mode when payment becomes due.
- Enter the real customer and service
- Check GST or no-GST
- Preview and export the invoice
Questions people ask before making this invoice
These are practical questions that show up around ABN, GST, phone invoicing, and small-job invoice records.
Should contingency be hidden?
The calculator shows it separately for planning. Decide how the customer-facing quote describes risk and inclusions honestly.
Does the total include GST?
No. The project result is pre-GST so the real supply and registration status can be handled separately.
Can actual hours replace estimated hours?
Yes. Recalculate with actual approved hours before issuing a time-based invoice.
Fast workflow for project cost billable hours calculator
Enter labour
Add people, billable hours per person and the hourly rate.
Add direct costs and contingency
Include materials and other expenses that belong to the project.
Create the customer document
Use Quote for an estimate and Invoice for the actual payable transaction.
Related invoice workflows
Continue with the closest ABN Invoice workflows for this search intent.
Common questions
Can I include several workers?
Yes. Enter the number of people and billable hours per person.
Does contingency equal profit?
No. It is an estimate allowance and may be consumed by project risk or changes.
Can I invoice estimated work before it happens?
Only according to the genuine customer agreement; use Quote when the amount is still only an estimate.
Is the calculator free?
Yes. It runs in the browser without an ABN Invoice account.
Does the calculator create an invoice automatically?
No. Review the result first. If a genuine customer transaction exists, open ABN Invoice and enter the real transaction details.
Can ABN Invoice save the customer document?
Yes. You can start without signing up; account features add searchable history, cloud records and export workflows for repeat invoicing.