GST Calculator
Work out GST on any invoice, in or out, without second-guessing the maths.
33+ free downloads
Calculators you can use right now, plus a pile of checklists and templates for Aussie small businesses and everyday folks. Free, no catch.

Nothing to download. These run in your browser and take a couple of minutes.
Add GST, take it off, or see roughly what this quarter's BAS will sting you.
Open itPick your line of work and tick off what you can claim. Tradies, nurses, drivers, teachers, sole traders, landlords.
Open itTen quick questions, a score out of 100, and the three things to fix first.
Open itThe ones people keep coming back for.
Work out GST on any invoice, in or out, without second-guessing the maths.
A rough idea of what you'll owe, so tax time isn't a shock.
Every ATO date that matters this year, on one page you can stick on the wall.
A simple flowchart for growing without burning out.
Have a search, or filter by what it is and what it's about.
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33 resources
Work out GST on any invoice, in or out, without second-guessing the maths.
A rough idea of what you'll owe, so tax time isn't a shock.
Every ATO date that matters this year, on one page you can stick on the wall.
What to sort before the new financial year sneaks up on you.
Get prepared for end of financial year without the last-minute scramble.
A longer run-through if you've got staff, stock or a few moving parts.
The claims people forget, laid out so you don't leave money with the ATO.
A logbook the ATO's happy with, for tracking work trips.
See where your Sunday nights actually go, hour by hour.
Put a dollar figure on doing the books yourself. It's usually more than you'd think.
The jobs worth automating first, ranked by the time you get back.
The five numbers to glance at every week so nothing creeps up on you.
A simple check of whether your business is ready for payday super.
Old rules versus new, side by side, in plain English.
Check your own payroll before Fair Work or the ATO do it for you.
Everything you need off a new hire, collected once and done right.
A simple flowchart for growing without burning out.
Score your setup and see if your structure's helping or holding you back.
What to do when the phone goes quiet, instead of panicking.
Find the step where good enquiries quietly drop off.
Work out which customers make you money, and which just make you busy.
Work out who you're actually for, so you stop marketing to everyone.
Product, price, place, promotion — a one-page gut check.
Before you chase the big job, check you can actually deliver it.
For the big calls — hire, buy, expand — thought through before you commit.
Spot the jobs being done twice and the ones nobody owns.
Where your team's hours go, and the easy fixes that give some back.
ABN, GST, ASIC, insurance, super — the lot, in one tick-off list.
Your work health and safety duties, in plain English.
How we work together — what we need, what you get, how long it takes.
Set expectations with your own clients before things get awkward.
Household money on one page. Where it goes, and where it should.
Knock up a tidy invoice in a couple of minutes.
Ready to get the numbers sorted?
Tell us what's going on and we'll help you work out the next step.
No pressure. No accounting lecture. Just a straightforward chat.