How to Read Your Bookkeeper's Invoice, Line by Line

Updated: November 2026

To have this handled on a fixed monthly fee, see Sydney monthly bookkeeping service.

To read your bookkeeper's invoice, check three things. First, is it a valid tax invoice, so you can claim the GST credit? Second, does each line describe real work you can match to an outcome? Third, does the total match what you agreed, whether that is an hourly rate or a fixed monthly fee? This guide walks through each check, the phrases worth questioning on hourly invoices, and how to raise a query without souring the relationship. For how hourly billing adds up, see our article on the $147 email.

Is it a valid tax invoice?

If your bookkeeper is registered for GST, their invoice should meet the ATO tax invoice rules so you can claim the GST credit. For sales under $1,000, a tax invoice must clearly show:

• That the document is intended to be a tax invoice.
• The seller's identity.
• The seller's ABN.
• The date of issue.
• A brief description of what was sold, including quantity if applicable, and the price.
• The GST amount, or a statement that the total price includes GST.
• The extent to which each item is a taxable sale.

For invoices of $1,000 or more, it must also show your identity or ABN. If you ask for a tax invoice, the supplier must provide one within 28 days. Most bookkeeping invoices to your business will be well over $1,000 a quarter, so check your business name or ABN appears.

Should your bookkeeper charge GST?

A business must register for GST once its GST turnover is $75,000 or more. Below that, registration is optional. If your bookkeeper charges GST, their ABN should show as registered for GST on the ABN Lookup site. If they are not registered, they should not add GST.

What should a fixed-fee invoice look like?

• One line for the monthly fee, with the period it covers.
• Separate lines for any agreed extras, such as a catch-up project.
• GST shown clearly.
• No unexplained "disbursements" or "administration" charges.

If you are on a fixed fee and the invoice has extra lines you did not agree to, ask about them. Our guide to what a fixed-price quote should include explains what should be in the fee.

What should you look for on an hourly invoice?

Hourly invoices are often itemised in tenths of an hour. These phrases are worth a closer look:

• "Attending to correspondence": reading or replying to emails. Ask how many and what they related to.
• "Perusal of documents" or "review": looking at something. Ask what was reviewed and what came of it.
• "General administration": a catch-all with no description. Ask for a breakdown.
• Split tasks: BAS preparation, BAS review, BAS lodgement and BAS correspondence billed separately. Ask whether that matches what you agreed.
• Minimum units: several short entries each billed at a minimum. Add them up to see the total.

How do you check the total is fair?

• Compare the hours with the work you can see in Xero, such as reconciled transactions and lodged BAS.
• Compare with previous invoices for similar periods.
• Check the rate matches your engagement letter.
• Ask for a quote for regular work if hourly totals keep changing.

How do you raise a query politely?

Send a short email listing the lines you want explained and asking for a breakdown. Keep it factual. Most bookkeepers are happy to explain. If the answers are unclear and you are considering a change, see how to change your Sydney bookkeeper and our guide on whether your bookkeeper is overcharging.

Can you claim the bookkeeping fee?

Bookkeeping fees for running your business are generally a business expense, and you can claim the GST credit if you are registered for GST and hold a valid tax invoice. GST credits generally need to be claimed within 4 years. Ask your accountant about your situation.

What do most people miss?

Questions you stopped asking. When every email is billed, many owners stop asking their bookkeeper anything, and small issues become expensive ones. If your invoice is making you avoid your bookkeeper, the billing model is costing you more than the invoice shows.

What should your engagement letter say about billing?

Your engagement letter is the reference point for every invoice. It should set out:

• Whether you pay a fixed fee, an hourly rate, or a mix.
• The hourly rate and minimum billing unit, if hourly.
• What the fixed fee covers, and what is billed as extra.
• Whether questions and emails are included.
• How often you are invoiced and the payment terms.
• How fees are reviewed and how much notice you will get.

If you do not have one, ask for it. Our guide to a bookkeeper engagement letter explains what to look for.

What should you do if an invoice is wrong?

• Pay any part of the invoice you agree with, so the dispute is only about the lines in question.
• Ask in writing for an explanation or correction of the specific lines.
• If GST details are missing, ask for a corrected tax invoice. You need a valid tax invoice to claim the GST credit.
• If you cannot resolve it and your bookkeeper is a registered agent, you can contact the Tax Practitioners Board about conduct concerns.

Most invoice issues are simple misunderstandings that a short email resolves.

Should you switch to a fixed fee?

If your invoices change a lot each month, or you avoid asking questions because of cost, a fixed fee may suit you better. Ask your current bookkeeper whether they offer one, and compare it with other quotes using a written scope.

How often should you review your bookkeeping invoices?

Once a quarter is enough for most businesses. Line up the last three invoices, compare them with the work done in Xero and the BAS lodged, and note any trend. If hourly totals are creeping up without a change in your business, ask why. Reviewing regularly keeps small issues from building into a large disagreement, and it gives you the information you need if you decide to ask for a fixed quote instead.

Keep a copy of each invoice with its payment record, so the GST credit is easy to support if the ATO ever asks.

Related reading: find a bookkeeper in your Sydney suburb.

FAQ

What must a tax invoice from my bookkeeper include?

For invoices under $1,000: that it is a tax invoice, the seller's identity and ABN, the date, a description and price, the GST amount, and the extent each item is taxable. Invoices of $1,000 or more must also show your identity or ABN.

Can I ask for a breakdown of an hourly invoice?

Yes. It is reasonable to ask what each line relates to.

Should a fixed-fee invoice have extra charges?

Only for extras you agreed to in writing, such as a separate catch-up project.

How do I check if my bookkeeper is registered for GST?

Search their ABN on the ABN Lookup website.

Tired of invoices you cannot read?

Our packs are one fixed monthly fee, plus GST, with questions included. Get a quote you can understand.

Next step: send us a message and a real person replies within a few working hours, or book a free Xero Roast, a 15-minute plain-English review of your file with a fixed quote at the end. Our fixed monthly packs include a 4-hour reply guarantee, no lock-in and a 30-day money-back guarantee.

About Sydney Bookkeeper

Sydney Bookkeeper is the modern, fixed-price Sydney bookkeeper for businesses with staff that are tired of slow, hourly, jargon-spouting incumbents. We work with professional services firms, construction and property businesses, agencies, tech and ecommerce companies, hospitality groups, and health practices across Sydney. Monthly bookkeeping, BAS lodgement, payroll, and Xero file cleanups, all on fixed monthly pricing, no lock-in.

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The team uses a registered BAS Agent for all BAS and IAS lodgement services. Full registration details, agent particulars, and copies of the Tax Practitioners Board (TPB) Code of Professional Conduct, the TPB complaints process, and any conditions on the agent's registration are available on request by emailing hello@sydneybookkeeper.com. This content is general information only, written for Australian small and mid-market businesses. It does not constitute tax, financial product, or legal advice and should not be relied on as such. Tax obligations depend on your individual circumstances. For advice specific to your business, contact the team directly or consult a registered tax agent or licensed financial adviser. Sydney Bookkeeper is not a licensed tax agent or licensed financial adviser. Information was current at the time of publication and may change without notice. We review and update guides periodically.

Sources

• ATO, Tax invoices: https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst/tax-invoices
• ATO, GST: https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst
• Australian Business Register, ABN Lookup: https://abr.business.gov.au/
• ATO, Time limits on GST credits and refunds: https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst/claiming-gst-credits/time-limits-on-gst-credits-and-refunds
• Tax Practitioners Board, Public register: https://www.tpb.gov.au/public-register