PAYG instalments explained for business owners

Why the ATO has entered you into PAYG instalments

Employees have tax withheld from every pay packet, so they meet their tax bill gradually across the year without really noticing. Business owners and investors don't get that luxury, which historically meant one large bill landing after the return was lodged. PAYG instalments spread that liability across the year instead. Once your return shows enough business or investment income, the ATO writes to you and starts issuing instalments, usually quarterly, on your activity statement.

The first year in the system often feels like a double hit, because you're paying last year's tax bill and prepaying this year's at the same time. That's a timing squeeze, not an error on anyone's part, and it's the main reason new entrants should plan their cash flow around it early rather than late.

The two calculation methods

The ATO gives you two ways to work out each instalment, chosen on your activity statement.

• Instalment amount: a fixed dollar figure calculated by the ATO from your last tax return, which you simply pay each period
• Instalment rate: the ATO gives you a percentage, applied to your actual instalment income for the period, so payments move up and down with revenue

The fixed amount is the simpler option, and plenty of business owners just pay it and move on. The rate method tracks reality more closely, which suits seasonal businesses or anyone with income that swings around, since a quiet quarter automatically produces a smaller instalment. The catch is you need reliable bookkeeping to know your instalment income each period, not a rough guess scribbled on the back of an envelope.

Varying your instalments

If your income's genuinely dropped since the last return, you can vary the instalment down rather than overpaying and waiting on a refund at assessment time. Variations happen on the activity statement, before it's due.

Vary with care, though. Underestimate significantly and the ATO can apply interest on the shortfall. Base a variation on a realistic full year profit estimate, not on how the bank balance feels this week, and do it alongside your accountant or bookkeeper using actual year to date figures rather than gut feel.

Managing instalments in your bookkeeping

Record instalments against an asset or clearing account for income tax paid in advance, never as an expense in the profit and loss. Coding them as an expense understates profit and creates confusion the moment the tax return gets prepared. Your bookkeeper should also reconcile what's been paid against your ATO account each quarter, so nothing goes missing or gets counted twice.

It's worth sanity checking the ATO's figure every year too. The instalment is based on your last lodged return, so a one off spike, a capital gain say, can inflate next year's instalments well past what you'll actually owe. That's a textbook case for a variation.

Where NextEra fits

Deciding whether to pay or vary an instalment needs accurate year to date profit figures, which happens to be exactly what managed monthly bookkeeping produces. NextEra keeps those numbers current so instalment decisions are made on evidence rather than instinct, and our Strategic Finance Review looks at how tax prepayments sit within your wider cash flow position.