Updated for 2026–27 ATO rates

Know what to put aside.

Tax and BAS tracking for Australian sole traders. Log your invoices and expenses, and Numbat tells you how much of every payment is really yours.

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  • From AU$24, once
  • No account, no bank feeds
  • 30-day refunds
The problem

Getting paid feels great. Until October.

Every invoice lands in your account looking like it's all yours. It isn't. Some of it belongs to the ATO, and you only find out how much once the year's over.

The tax bill you didn't save for

No employer is holding tax back for you. Spend it through the year and your return turns into a bill you can't cover, plus a PAYG instalment on top for next year.

BAS every quarter, from a shoebox

Four times a year you dig through invoices and receipts to work out G1, 1A and 1B. Was that GST-free? Did that one get paid this quarter or last?

Numbat gives you one number to put aside from every payment, and your BAS ready before you need it.

How it works

Three steps. About five minutes a week.

  1. Log your invoices

    Amount, client, due date. Tick it off when the money lands. GST is split out for you.

  2. Log your expenses

    Pick a category, set the business-use share, and Numbat works out the deduction and your GST credit.

  3. See your number

    One percentage to move into savings each time you're paid, and your BAS figures for the quarter.

Features

Everything a sole trader actually needs. Nothing they don't.

Your tax set-aside, as a percentage

Numbat projects your full year from what you've earned so far, then applies the tax brackets, Medicare levy, HELP and both offsets (low income and small business). You get one number.

BAS figures every quarter

G1 total sales, 1A GST on sales and 1B GST on purchases, on a cash basis, split by quarter and ready to copy into your BAS. Plus what you'll pay or get back.

Invoice tracker

Paid, awaiting and overdue at a glance, so you know who to chase and how much is still out.

Expenses and GST credits

17 sole-trader categories, business-use percentages and GST credits worked out for every receipt.

Car and home office

A trip log at 91c/km (capped at 5,000 km) and the 70c/hour fixed rate for working from home.

Works with a day job

Enter your salary and Numbat only asks you to save the extra tax your business creates.

2026–27 ATO rates

The new 15% bracket, Medicare levy and HELP thresholds, all in one editable table you update each July.

Free calculator

How much should you put aside?

Pop in what you expect your business to make this financial year. You'll get the same estimate Numbat gives you, using the 2026–27 rates.

  • Includes the Medicare levy, HELP and both tax offsets
  • Counts tax your job already withholds
  • Runs in your browser. Nothing is sent anywhere.
HELP or student debt?
GST registered?
Put aside
19%of your business profit for tax
Tax on the business$15,120
Each week$291
Each month$1,260

Registered for GST? Keep the GST you charge (1/11 of each GST-inclusive payment) aside as well. It goes out with your BAS.

See how it's worked out

    An estimate for Australian residents using 2026–27 rates. Not tax advice. It doesn't cover the Medicare levy surcharge, family thresholds or capital gains.

    Editions

    Pick the one that fits how you work.

    Same calculations in every edition, checked against each other to the cent.

    Spreadsheet

    For people who live in Excel, Google Sheets or Numbers.

    AU$24one-off

    Yours to keep. No subscription.

    • Works in Excel, Google Sheets and Numbers
    • Dashboard, invoices, expenses and car log
    • Example data to learn from
    • All 2026–27 rates in one editable table
    Buy the spreadsheet
    Most popular

    Notion template

    For people who already run their work in Notion.

    AU$29one-off

    Duplicate it into your workspace in one click.

    • One dashboard, four connected databases
    • Invoice board and receipt uploads
    • Works on Notion desktop, web and mobile
    • A "Start here" guide built in
    Buy the Notion template
    Early access

    Numbat app

    For people who want it on their phone, with nothing to set up.

    AU$7/ month

    or AU$59 / year (save AU$25)

    • Works on phone and desktop
    • Works offline
    • Your data stays on your device
    • New rates arrive automatically each July
    Join the waitlist

    Bundle: spreadsheet + Notion

    Best value

    Can't decide, or switching between tools? Get both editions and use whichever suits the day.

    AU$39one-off Save AU$14
    Buy the bundle

    Prices in Australian dollars, GST included where it applies. 30-day refunds, no questions asked.

    A look inside

    See it before you buy it.

    The Notion template dashboard: put aside 18% of every payment, BAS Q1 figures and invoice statuses.
    The dashboard: your number, this quarter's BAS and who owes you.
    What's inside the Notion template: tax set-aside, BAS-ready GST, invoice tracker, expense categories, car and home office, and yearly rates.
    Four connected databases, every formula already built.
    The spreadsheet dashboard: put aside 18%, set aside so far $5,074, the year so far, BAS by quarter and the full-year tax breakdown.
    The dashboard: your number, the year so far and BAS by quarter.
    Spreadsheet summary tables: expenses by category with GST credits, and income and expenses by month.
    Expenses by category and month, with GST credits worked out.
    The Numbat app home screen: put aside 18% of every payment, set aside so far $5,074, income, expenses, unpaid and overdue totals, and the Q1 BAS.
    Early access: the app's home screen, on desktop.
    The Numbat app BAS screen: G1, 1A and 1B for each quarter with the GST to pay.
    Every quarter's BAS, ready to type into the ATO's online services.
    FAQ

    Good questions.

    Something else on your mind? Send us a message and a real person will get back to you.

    Is this tax advice?

    No. Numbat is a planning tool. It gives you a close estimate so you can save as you go, using the ATO's published rates. It isn't a substitute for a registered tax agent, and you should check your return with one.

    Do I need to be GST registered?

    No. Switch GST off in settings and Numbat leaves it out of everything and hides the BAS figures. You must register once your GST turnover reaches $75,000 a year; when you do, switch it on and your BAS figures appear.

    Does it work if I also have a job?

    Yes. Enter your salary and Numbat works out the tax on your combined income, then takes off what your employer already withholds. What's left is the extra tax your business creates, and that's all it asks you to put aside.

    What happens next financial year?

    All the rates live in one table. Each July you start a new year and update the numbers; buyers get an email with the new rates (for 2027–28, the 15% bracket drops to 14%). The app updates itself.

    Which edition should I pick?

    Whichever tool you already open every day. Notion people should get the Notion template. Spreadsheet people should get the spreadsheet. If you'd rather tap it in on your phone, join the app waitlist. The numbers are identical in all three.

    Is my data private?

    Yes. The spreadsheet and Notion template live in your own files and workspace; we never see them. The app stores everything on your device and works offline, with no account and no bank connection. This calculator runs in your browser and sends nothing.

    What if it's not for me?

    Email us within 30 days and we'll refund you in full. No questions, no forms. This is on top of your rights under the Australian Consumer Law.

    Numbat app · Early access

    Get the app first.

    Join the waitlist for early access and a launch discount. We'll also tell you when the 2027–28 rates are in. One or two emails a month at most.

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