The 5 costly tax mistakes tradies make every year

If you’re in your first five years running a trade business, tax time can feel like a shock. The work’s been steady, the bank account hasn’t looked too bad, and then suddenly you’re staring at a bill you didn’t plan for.

Most tradies don’t get caught out because they’re reckless. They get caught out because no one showed them how to structure the money properly.

Here are the five mistakes I see every year.

Treating GST like income

You invoice $110,000 and see $110,000 hit the bank. But $10,000 of that belongs to the ATO. If you’re not separating GST weekly, you’re slowly building a liability in the background. By BAS time, the cash is gone.

The fix is simple: separate GST as it comes in and don’t touch it.

Buying equipment “to save tax”

Spending $60,000 to save $15,000 in tax still leaves you tens of thousands out of pocket. Deductions reduce taxable profit, they don’t make purchases free.

Only buy assets that make commercial sense and that your cash flow can actually support.

Ignoring PAYG instalments

If your profit increased last year, the ATO may ask for instalments toward this year’s tax. That’s not a mistake, it’s how the system works.

If you haven’t been setting money aside, you end up paying last year’s tax and prepaying this year’s at the same time. That’s where the squeeze happens.

Underestimating wage costs

Wages aren’t just the hourly rate. There’s super, leave, workers comp and PAYG on top. If super isn’t paid on time, it can become non-deductible and attract penalties.

Know the full cost before you hire, and move payroll liabilities out of your main account each pay run.

Not knowing your profit until year end

If you only find out what you made when your accountant finalises the year, it’s too late to plan. Without regular reconciliations and monthly reviews, tax becomes a surprise instead of a forecast.

You should know your year-to-date profit well before June.

The common thread isn’t tax, it’s structure. Separate accounts. Weekly reconciliations. Regular profit reviews. Consistent tax set-asides.

When the structure is right, tax time stops being a panic and becomes a conversation.

And that’s when a trade business starts building profit instead of constantly playing catch-up.

Join our Small Business Foundations Course and get tax ready without the stress.