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Australia · FY2025

Invoice Totals Calculator

Calculate invoice totals including VAT or sales tax and discounts.

Last reviewed: 7 November 2025Source: HMRC — Running a business
Invoice Totals Calculator · AUBusiness & Freelance

Rates & sources

UK company rates (Corporation Tax, VAT, payroll NI) as published by HMRC and Companies House.

Source: HMRC — Running a business — figures refreshed at the start of each tax year.

When to use this calculator

  • Before pricing a job, setting margin targets, or reviewing hiring costs.
  • When you want to test sensitivity around volume, VAT, markup, or overhead changes.
  • When you need a practical estimate before committing to a budget or proposal.

A realistic Australia planning example

Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.

Subtotal (A$)

1000

VAT / Sales Tax Rate (%)

5%

Discount (%)

0

After entering these figures, compare discount, net and tax before deciding which scenario looks strongest.

How to read your results

Discount

Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.

Net

Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.

Tax

Review this figure alongside your gross income so you can understand the true cost of deductions.

Total

This is the headline outcome, but it is most useful when viewed alongside the supporting metrics below it.

Common mistakes

  • !Using optimistic assumptions without testing a more cautious scenario as well.
  • !Comparing outputs from different tools without checking that the inputs match.
  • !Treating the result as a final quote instead of a planning estimate.

What to do next

  • Try at least one more scenario so you can compare a realistic range instead of a single estimate.
  • Use the related calculators below to cross-check the decision from another angle.
  • Open one of the linked guides if you need more context before you act on the result.

Frequently asked

HMRC requires: a unique sequential invoice number, your business name and address, your VAT registration number, invoice date (and tax point if different), customer name and address, description of goods/services, net amount, VAT rate and amount, and gross total. Simplified invoices (under £250 including VAT) can omit customer details.

Use arrow keys to navigate items, Enter or Space to expand/collapse.

End-of-article next steps

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