Avoid These 6 Mistakes When Buying Your First Home

Your first home loan application as a FIFO mining engineer looks solid on paper until you realise how many lenders shade your income or misread your pay structure.

The mistakes that cost approval or add thousands to your borrowing costs are usually made before you submit the application, not during it. Most involve how income is calculated, which deposit options you qualify for, and how you structure the loan itself. Get those right and the process becomes straightforward.

Assuming All Lenders Treat FIFO Income the Same

They do not. One lender will shade your allowances and overtime to 80% while another uses 100% of the same income stream. Consider a mining engineer on a 14/14 roster earning a base salary of $110,000 plus $45,000 in allowances and overtime. At a lender applying 80% shading, that $45,000 becomes $36,000 for serviceability purposes, reducing your borrowing capacity by roughly $90,000. At a lender using 100%, the full amount counts. The difference determines whether you qualify for the property you want or settle for something smaller. Suncorp shades non-essential services overtime and allowances to 80% where earned continuously for six months or more, while Ubank applies the same 80% rate to regular PAYG overtime and shift allowances. Bankwest uses a dedicated FIFO income verification formula that calculates total hours per cycle multiplied by your lowest hourly rate, then multiplies that by working cycles per year. CBA redirects FIFO workers with fluctuating base salary to their PAYG Work Related Allowances policy rather than standard base income assessment. The policy your application follows changes the result. Choosing a broker who understands which lender suits your pay structure and roster type matters more than chasing the lowest advertised rate.

Skipping the 5% Deposit Scheme Because You Think You Earn Too Much

You do not. Income caps were removed from the Australian Government 5% Deposit Scheme in January. Eligible first home buyers can now purchase with a 5% deposit without paying Lenders Mortgage Insurance regardless of income. High-earning FIFO workers previously excluded due to income thresholds are now eligible. Property price caps still apply and vary by location. In Western Australia, the cap is $850,000 for Perth and applicable metropolitan postcodes, and $600,000 for the rest of the state. In Queensland, the cap is $1,000,000 for Brisbane and regional centres, and $700,000 for other areas. Both the purchase price and the lender's assessed value must be at or below the applicable cap. Applications are made through a participating lender, not directly through Housing Australia. You cannot combine the scheme with Help to Buy, but you can use it alongside state and territory grants and stamp duty concessions. In Western Australia, eligible first home buyers purchasing a new home valued at $800,000 or less can access the $10,000 First Home Owner Grant, pay no stamp duty under the First Home Owner Rate, and use the 5% Deposit Scheme simultaneously. That combination turns a $40,000 deposit requirement into a $15,000 one while eliminating LMI entirely. The 5% Deposit Scheme for FIFO Workers page explains eligibility and participating lenders in detail.

Not Using the First Home Super Saver Scheme

The First Home Super Saver Scheme allows you to make voluntary contributions into your superannuation fund and release eligible amounts toward your deposit. Up to $15,000 of personal contributions from any one financial year can be released, with a total cap of $50,000. Concessional contributions are taxed at 15% rather than at your marginal income tax rate. A mining engineer on a marginal rate of 37% saves 22 cents in every dollar contributed. Over two financial years, contributing $30,000 into super and releasing it for a deposit saves approximately $6,600 in tax compared to saving the same amount in a standard bank account. You need to obtain a determination from the ATO before signing a purchase contract. The released amount is taxed again on withdrawal, but the combined tax burden remains lower than saving post-tax income. The scheme works alongside other deposit sources including genuine savings, gifted deposits, and the equity contribution from parents under a guarantor arrangement. It does not replace those sources but adds to them in a tax-effective structure.

Paying LMI When Your Occupation Qualifies for a Waiver

It does not. FIFO workers, mining engineers, and resources sector occupations are not eligible for occupation-based LMI waivers at Bankwest, CBA, NAB, Westpac, or St George and Bank of Melbourne. Eligible categories are limited to medical practitioners registered with AHPRA, legal professionals holding a current practising certificate, and accountants with CA, CPA, CFA or FIAA designation. A FIFO mining engineer holding one of those professional credentials may be eligible on that basis, but the engineering qualification alone does not qualify. If you do not hold one of those credentials and you are borrowing above 80% of the property value, you will pay LMI unless you use the 5% Deposit Scheme or a guarantor structure. ME Bank introduced an LMI cashback in August offering $2,000 for customers whose loan requires LMI, but that offsets the cost rather than waiving it. On a loan of $680,000 at 90% LVR, LMI typically costs between $18,000 and $24,000 depending on the lender. The cashback reduces that to between $16,000 and $22,000. The LMI Waivers for FIFO Workers page covers which lenders offer waivers and what qualifications are accepted.

Locking Into a Fixed Rate Without Understanding Your Roster Cycle

Fixed rates remove flexibility at the exact time your income and expenses are most likely to change. A mining engineer on a 14/14 roster earning $155,000 annually might see that income jump to $180,000 if the roster moves to 21/7 or drop if the project winds down and the next role takes three months to secure. A fixed rate loan typically restricts extra repayments to $10,000 or $20,000 per year depending on the lender. If you receive a $40,000 retention bonus and want to pay it against the loan, anything above the cap attracts break costs. A variable rate loan with an offset account lets you park that bonus in the offset and withdraw it if your next roster gap lasts longer than expected. The interest saving is identical to making an extra repayment, but you keep access to the funds. Fixed rates suit borrowers with stable income and predictable expenses. FIFO workers rarely fit that profile. A split structure with 50% fixed and 50% variable gives you rate certainty on half the loan and flexibility on the other half, but that still locks half your borrowing into a structure that does not match how FIFO income moves. Most FIFO workers are better off staying fully variable with an offset account and focusing on securing a low variable rate through a broker who understands how to position the application.

Stretching Borrowing Capacity to the Limit Without a Buffer

Banks are now restricted on loans where total debt exceeds six times your gross annual income under APRA's debt-to-income settings introduced in February. A mining engineer earning $160,000 can borrow up to $960,000 before hitting the DTI threshold, but once you reach or exceed that ratio, mainstream banks may tighten the servicing buffer, reduce the maximum LVR, lower the loan amount, or decline the application outright. Income shading artificially increases your apparent DTI ratio. If your actual income is $160,000 but your shaded income for serviceability purposes is $140,000, your borrowing capacity drops but your DTI ratio is still calculated on the $160,000 figure. That mismatch pushes you closer to the DTI cap even though your serviceability suggests you should borrow less. Non-bank lenders regulated by ASIC are not subject to APRA's DTI portfolio caps, but they typically price higher than the major banks. Borrowing to the edge of your capacity leaves no room for rate rises, roster changes, or periods between contracts. A mining engineer buying in Ellenbrook at the current median of $841,000 with a 10% deposit needs to borrow $757,000. At an interest rate of 6.5%, monthly repayments sit around $4,800. If rates rise by 1%, repayments jump to $5,300. If your roster drops from 14/14 to 8/6 while you are between projects, your income falls by roughly 25% for that period. The loan serviceability that looked comfortable at full roster income becomes tight. Borrowing $650,000 instead and buying at $720,000 leaves a buffer that absorbs rate rises and roster gaps without forcing you to dip into savings or miss repayments. The Home Loans for FIFO Workers page explains how brokers calculate realistic borrowing limits that account for FIFO income volatility.

You are not applying for a loan the same way a metro-based engineer on a fixed salary would. Your income structure is different, your work pattern is different, and the lender policies that apply to your application are different. The mistakes that derail FIFO first home buyers are usually made by treating the application as standard when it is not. Get your income assessed at the right lender, use the deposit schemes and tax structures you qualify for, and structure the loan to match how your income actually moves. Those decisions are made before you submit the application, not after.

Call one of our team or book an appointment at a time that works for you. We work with FIFO mining engineers across every roster type and know which lenders treat your income structure fairly without shading it into a bracket that does not reflect your actual earning capacity.

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