How to Use Variable Rates and Offset Accounts

Variable rate loans with offset accounts are the most flexible setup for FIFO workers who need access to their cash between swings.

When you're on a variable rate, your repayments move up or down when the lender changes their interest rate. That's the risk you carry. The benefit is you can make extra repayments, redraw funds when you need them, and link an offset account without restrictions. For FIFO heavy diesel mechanics banking multiple weeks of pay in one hit, then drawing it down between shifts, that flexibility matters more than locking in a rate that might look lower on paper.

How Variable Rates Are Set and What You Pay

Variable rates aren't set by the Reserve Bank. They're set by your lender based on their funding costs, competition, and how much margin they want to make. When the Reserve Bank moves the cash rate, most lenders follow within a few weeks, but they don't have to match it exactly.

Your actual rate depends on how much deposit you have, your income, and whether you qualify for discounts. A FIFO heavy diesel mechanic with a 10% deposit might be offered a different rate to someone with 20%, even from the same lender. When you're comparing home loan options, ask what rate applies to your deposit size and employment type, not just what's advertised.

What an Offset Account Does and Why It Cuts Interest

An offset account is a transaction account linked to your home loan. Every dollar sitting in the offset reduces the balance you're charged interest on. If you owe $400,000 and have $20,000 in your offset, you only pay interest on $380,000.

You don't earn interest on the offset balance. Instead, you save interest on the loan. At current variable rates, that's worth more than any savings account will pay you. The money in the offset is still yours to spend. You can access it anytime with a debit card or transfer, which is why it suits FIFO workers who need cash on hand between rosters.

Consider a heavy diesel mechanic earning around $150,000 working two weeks on, one week off. After tax and super, around $7,000 to $8,000 hits the account each swing. If that sits in an offset for two weeks before being used, it saves interest on the loan for that fortnight. Over a year, those short holding periods add up. You're not locking money away, you're just parking it somewhere that works harder.

Offset vs Redraw and Why the Difference Matters

Redraw lets you pull back extra repayments you've made on the loan. Offset keeps your money separate in a transaction account. Both reduce the interest you pay, but offset is faster and cleaner.

With redraw, you have to request the funds. Some lenders process it instantly online, others take a few days. Some cap how much you can redraw or charge a fee. The lender can also change redraw rules because the money technically belongs to the loan. With offset, the money is yours. It's in your account. You spend it when you want.

If you're trying to manage living costs across a swing roster, offset gives you more control. The trade-off is that loans with offset usually have a slightly higher interest rate than basic variable loans with redraw only. For most FIFO workers, the difference is small enough that the flexibility is worth it.

Building a Deposit While Keeping Cash Accessible

If you're saving for your first home while working FIFO, an offset account can be attached to a loan after settlement, but it won't help you before that. Before you buy, the First Home Super Saver Scheme is worth looking at. You salary sacrifice into super, then withdraw up to $50,000 for a deposit. The contribution is taxed at 15% instead of your marginal rate, which for most mechanics is 32.5% or more.

Once you've got your deposit sorted and you're ready to apply, getting loan pre-approval before you start looking at properties will show you what you can borrow and lock in your rate for up to six months. Pre-approval doesn't guarantee final approval, but it gives you a number to work with and speeds up settlement once you find something.

First Home Guarantee and How It Affects Your Loan Structure

The First Home Guarantee was expanded in late 2025 with no income cap. You can buy with a 5% deposit and avoid paying Lenders Mortgage Insurance. That's a saving of several thousand dollars, sometimes more depending on the property price.

Most lenders offering loans under the scheme will give you a variable rate with offset. You're not locked into a fixed rate or a basic loan structure. The scheme just removes the LMI cost. The rest of the loan works the same way as any other variable rate home loan. You can make extra repayments, use an offset, and refinance later if you find something that suits you better.

What Happens When Rates Move and Your Repayment Changes

When your lender increases the variable rate, your minimum repayment goes up. If you've been paying extra or using an offset to reduce interest, that buffer can absorb some of the impact, but your required repayment still rises.

Most lenders will send you a notice a few weeks before the change. Your repayment might increase by $50 to $200 a month depending on your loan size and how much the rate moved. If you're budgeting across FIFO rosters, factor in that your repayment isn't fixed. It will move a few times over the life of the loan.

If rates drop, your repayment drops too. You don't need to refinance or renegotiate. The lender adjusts it automatically. That's the upside of a variable rate. You benefit from cuts without doing anything.

Splitting Between Variable and Fixed and When It Makes Sense

Some buyers split their loan, putting part on a variable rate with offset and part on a fixed rate for stability. You get the flexibility of offset on the variable portion and predictable repayments on the fixed portion. The split can be any percentage, but 50/50 or 70/30 variable to fixed are common.

If you fix part of the loan, you usually can't offset against that portion. The offset only works on the variable portion. So if you split $400,000 with $200,000 fixed and $200,000 variable, your offset only reduces interest on the $200,000 variable portion. You also can't make large extra repayments on the fixed portion without break costs.

For FIFO heavy diesel mechanics who want some certainty but don't want to lock everything away, splitting can work. Just make sure the variable portion is big enough to make the offset useful. If you only have $50,000 variable and $350,000 fixed, the offset won't save you much.

Call one of our team or book an appointment at a time that works for you. We'll run the numbers on your deposit, work type, and roster to show you what rate and offset setup actually fits your situation.

Frequently Asked Questions