Nanny Tax File Number Declarations: A Step-by-Step Guide for Families

You've found the right nanny, agreed on hours and pay, and you're ready to get started. Then someone mentions a TFN declaration, and suddenly you're an employer with paperwork to sort out.

It catches a lot of families off guard. Hiring a nanny directly means you're taking on real employer responsibilities, and that starts with getting your nanny's tax and payroll set up properly. Here's what's actually involved.

Why your nanny needs a Tax File Number declaration

When you employ a nanny, you're not just paying for childcare hours. You're stepping into the role of household employer, whether you meant to or not.

One of the first things to sort out is your nanny's Tax File Number (TFN) declaration. According to the ATO, this form captures their TFN, residency status, any government study loan they're paying off, and whether they want to claim the tax-free threshold. That information determines how much tax gets withheld from each pay.

It sounds simple, and on paper it is. The tricky part is everything that sits around it.

Step 1: Work out who's actually employing the nanny

Before you even get to the TFN declaration, it helps to understand what kind of employer you are.

If you're employing a nanny directly, you'll generally need to register for PAYG withholding before you can take tax out of their pay. There's a small silver lining here though: families who only employ someone for domestic work, like a nanny, may not need an ABN at all. Instead, the ATO can issue what's called a withholding payer number.

If that sentence made your head spin a little, you're not alone. It's exactly the kind of thing families bring to us at Pay The Nanny. We sort it all out and take care of everything, so you don't have to become an ATO expert overnight.

Step 2: Complete the TFN declaration

Once you know where you stand, your nanny fills in the declaration. It covers:

• their Tax File Number
• whether they're an Australian tax resident
• if they want to claim the tax-free threshold
• any government study or training loan they're repaying

These days, nannies can also complete this online through their myGov account, which is linked to ATO online services. Depending on which method they use, what you receive as the employer and what you need to keep on file can look a bit different.

Small form, but it feeds straight into everything else.

Step 3: Get the tax calculation right

This is where the declaration actually earns its keep. Whether your nanny claims the tax-free threshold has a real impact on how much tax comes out of each pay.

Get it wrong one way, and your nanny ends up with less in their pocket than they should. Get it wrong the other way, and there could be a nasty surprise waiting at tax time. Neither is a great look for a first employer.

Ultimately, the tax file declaration and whether or not they are claiming the tax free threshold, for example, is driven by the nanny/employee – but it’s important to get it right.

Step 4: Remember there's more to it than the TFN

Here's the bit families often miss. A proper nanny payroll setup in Australia is not just a TFN and a pay rate.

You're also likely dealing with PAYG withholding, superannuation, payslips, leave entitlements, record keeping, and whatever employment conditions apply to your nanny's role.