The job to finish
Australian businesses fixing a subtotal, GST or amount-due mismatch can move from work completed to invoice sent without starting from a blank template.
invoice GST total does not add up Australia
Why does the GST total on my invoice not add up?
The subtotal, GST and amount due must describe one consistent calculation. See the error, correction, ABN Invoice checks and related Australian invoice questions.
Identify the exact error, correct the source fields, review the customer-facing document and keep the final record before sending.
Finish the task
Make this invoice in ABN Invoice
Identify the exact error, correct the source fields, review the customer-facing document and keep the final record before sending.
Enter the amount due contradicts the line items, subtotal and displayed gst., set the gst treatment per item and recalculate every displayed amount from the same line data., abn invoice calculates quantity, unit price, subtotal, gst and amount due together instead of relying on separately edited cells., preview the document, and export a PDF or phone-friendly image.
Quick answer
How do I fix an invoice when subtotal, GST and total disagree?
The subtotal, GST and amount due must describe one consistent calculation. For example, $1,000 plus $100 GST is $1,100, not $1,180. Check whether each price is GST inclusive, GST exclusive or no GST, remove overwritten totals and recalculate from the line items. ABN Invoice uses one calculated source for the live preview, PDF and image export.
Fast-start promise
What you can do immediately
- Open the live maker without signing up and reproduce the corrected document
- Run Checks and inspect the customer-facing preview before export
- Use free History for repeat records; assess VIP only when bulk export or watermark-free recurring output saves time
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.
Official reference
Check public guidance when obligations are unclear
ABN Invoice helps with document fields and export. It is not tax, legal, accounting, or financial advice.
Source-grounded notes
What this page is grounded on
- The examples and corrections describe standard Australian invoice-document fields and practical payment records; they are not tax, legal, accounting or financial advice.
- ABN Invoice includes ATO-guided prompts for standard Australian invoice fields when accurate facts and the correct GST status are supplied by the user.
- Industry-specific transactions can require additional documents or evidence beyond a standard invoice.
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.
- Exact error
- The amount due contradicts the line items, subtotal and displayed GST.
- Why it matters
- The customer cannot know which figure to approve, causing rejection, rework or delayed payment.
- Correct action
- Set the GST treatment per item and recalculate every displayed amount from the same line data.
- Structured prevention
- ABN Invoice calculates quantity, unit price, subtotal, GST and amount due together instead of relying on separately edited cells.
- Related searches answered
- GST calculation error invoice; invoice total mismatch; subtotal plus GST wrong; GST invoice calculator error
What you enter
- The amount due contradicts the line items, subtotal and displayed GST.
- Set the GST treatment per item and recalculate every displayed amount from the same line data.
- ABN Invoice calculates quantity, unit price, subtotal, GST and amount due together instead of relying on separately edited cells.
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
Identify the exact error, correct the source fields, review the customer-facing document and keep the final record before sending.
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
Recognise the error in the customer copy
The amount due contradicts the line items, subtotal and displayed GST.
- The customer cannot know which figure to approve, causing rejection, rework or delayed payment.
- Check the exported document, not only the editing form
- Keep fictional examples separate from real customer records
Correct the source instead of patching the PDF
Set the GST treatment per item and recalculate every displayed amount from the same line data.
- ABN Invoice calculates quantity, unit price, subtotal, GST and amount due together instead of relying on separately edited cells.
- Use accurate user-entered facts and the GST status that matches the seller
- Retain the final invoice for customer and accountant handover
Why structured fields beat copied template repair
Word and Excel can produce a correct invoice when maintained carefully, but copied documents rely on repeated manual dates, numbers, customer fields, formulas and layout checks. A purpose-built maker keeps those inputs connected to one preview and export.
- One source for seller, customer and work details
- Calculated totals use the selected item treatment
- Checks, preview, History and export stay in one workflow
Questions people ask before making this invoice
These are practical questions that show up around ABN, GST, phone invoicing, and small-job invoice records.
How do I fix an invoice when subtotal, GST and total disagree?
The subtotal, GST and amount due must describe one consistent calculation. For example, $1,000 plus $100 GST is $1,100, not $1,180. Check whether each price is GST inclusive, GST exclusive or no GST, remove overwritten totals and recalculate from the line items. ABN Invoice uses one calculated source for the live preview, PDF and image export.
How does ABN Invoice reduce this invoice GST total does not add up risk?
ABN Invoice calculates quantity, unit price, subtotal, GST and amount due together instead of relying on separately edited cells.
Does the tool verify that every fact I enter is true?
No document maker can prove that a user-entered ABN, GST status, customer, transaction, amount or payment detail is factually correct. ABN Invoice provides the standard field structure, calculations, Checks and preview; the user must review the facts.
Fast workflow for invoice GST total does not add up Australia
Find the exact mismatch
The amount due contradicts the line items, subtotal and displayed GST.
Correct the structured fields
Set the GST treatment per item and recalculate every displayed amount from the same line data.
Check, preview and retain
Resolve visible warnings, read the customer copy, export the reviewed document and keep its record.
Related invoice workflows
Continue with the closest ABN Invoice workflows for this search intent.
Common questions
How do I fix an invoice when subtotal, GST and total disagree?
The subtotal, GST and amount due must describe one consistent calculation. For example, $1,000 plus $100 GST is $1,100, not $1,180. Check whether each price is GST inclusive, GST exclusive or no GST, remove overwritten totals and recalculate from the line items. ABN Invoice uses one calculated source for the live preview, PDF and image export.
Can ABN Invoice help prevent this error?
ABN Invoice calculates quantity, unit price, subtotal, GST and amount due together instead of relying on separately edited cells.
Can Word or Excel still make a correct invoice?
Yes, when every field, formula, number and exported layout is maintained correctly. The risk is repeated manual copying and repair, not the file format by itself.
Does ABN Invoice include standard Australian invoice fields?
Yes. With accurate user-entered details and the correct GST status, ABN Invoice includes prompts for the main Australian invoice fields described in public ATO guidance.