Construction loan rates operate differently from standard home loans because you're charged interest only on funds drawn down at each stage of the build, not the full loan amount upfront.
For self-employed contractors in Sydney, understanding this rate structure matters because the way interest accrues during construction affects your cash flow during a period when you're often managing settlement costs, holding costs on land, and potentially maintaining another property. The rate itself may look similar to a standard variable or fixed home loan rate, but the application of that rate changes as your loan balance increases with each progress payment. Many lenders also charge a Progressive Drawing Fee, typically between $200 and $400 per drawdown, which adds to the total cost of funding your build.
How Interest Accrues During Progressive Drawdown
You're charged interest only on the amount drawn down at each stage of construction, not the total approved loan amount. If your approved construction loan is $700,000 but only $150,000 has been released to cover land purchase and initial site costs, you'll pay interest on $150,000 until the next progress payment is drawn.
Consider a contractor building in Sydney's Inner West who has secured construction finance with a variable rate. At settlement, the lender releases funds for land purchase. Two months later, after the slab is poured, the builder submits a progress claim and the lender releases the next drawdown following a progress inspection. Interest is recalculated after each release, so your monthly repayment amount increases as the build progresses. During construction, most borrowers are on interest-only repayment options, which keeps monthly costs lower while the property isn't yet generating rental income or available to live in.
Lenders typically require a quantity surveyor or their own valuer to conduct a progress inspection before releasing funds at each stage. The inspection confirms that the work claimed by the builder has been completed to a satisfactory standard. This protects both you and the lender, but it also means drawdowns aren't instant. You'll need to factor in processing time, usually five to ten business days from claim submission to funds reaching the builder.
Fixed Versus Variable Rates on Construction Loans
Most lenders offer variable rates during the construction phase, then allow you to fix once the build is complete and the loan converts to a standard home loan. Some lenders will allow you to fix the rate at the start of construction, but this is less common and may come with higher rates or restrictions on drawdown timing.
Variable rates give you flexibility if construction takes longer than expected or if you want to make additional payments once the build is finished and you've converted to principal and interest repayments. Fixed rates offer certainty, but if the build phase drags out or you want to refinance before the fixed term ends, you may face break costs. For self-employed borrowers who experience fluctuating income, variable rates during construction often make more sense because they allow you to adjust repayments or pay down the loan without penalty once the property is complete.
Some lenders structure construction loans as a construction to permanent loan, which means the loan automatically converts to a standard home loan once building is complete. Others require you to formally refinance or reapply at the end of construction. The distinction matters because reapplying means your income, borrowing capacity, and financial position are reassessed. If your circumstances have changed, you may not be approved for the same loan amount or rate.
How Lenders Assess Construction Loan Applications for Self-Employed Borrowers
Lenders assess construction loan applications using the same income verification standards as any other home loan, but they also evaluate the build contract, the registered builder, and the construction timeline. For self-employed contractors, this means providing two years of tax returns, recent business activity statements, and often a letter from your accountant confirming ongoing income.
The build contract must be a fixed price building contract with a registered builder, or in some cases, a cost plus contract where the builder charges for materials and labour with a margin. Owner builder finance is available but requires additional documentation and often a higher deposit. Lenders want to see council approval, stamped council plans, and confirmation that you can commence building within a set period from the Disclosure Date, usually six to twelve months.
In our experience, self-employed borrowers often have the deposit and income to service the loan but struggle with documentation timing. If your most recent tax return shows lower income due to deductions or business reinvestment, some lenders will allow you to use a loan application supported by business financials or accountant declarations. The key is structuring your application to show consistent serviceability across the construction phase and into the repayment phase once the loan converts.
What Progressive Payment Schedules Mean for Your Cash Flow
A typical progress payment schedule includes five to six stages: deposit, base stage, frame stage, lockup stage, fixing stage, and completion. The exact split depends on your building contract, but a common structure is 5% deposit, then 15%, 20%, 25%, 25%, and 10% at completion.
Your lender releases funds according to this schedule, but only after the builder submits a progress claim and the lender completes a progress inspection. If the builder requests payment for the frame stage but the inspector finds incomplete work, the drawdown is delayed. During that time, you're not charged interest on the unreleased funds, but the builder may pause work until payment is received. For contractors managing their own cash flow, this timing risk is worth understanding upfront.
Some builders include provisions in the contract to pay sub-contractors like plumbers and electricians directly. If your builder goes into administration mid-project, having a construction draw schedule that ties payments to verified progress protects you from paying twice for incomplete work. Lenders won't release funds unless the work matches the claim, which gives you a layer of oversight even if you're not on site daily.
How Fees and Charges Add Up Across the Build
Beyond the interest rate itself, construction loans include a Progressive Drawing Fee for each drawdown, valuation fees for progress inspections, and sometimes a separate application fee. If your loan involves a land and construction package, some lenders charge an additional fee for splitting the settlement between land purchase and construction funding.
A typical fee structure might include a $600 application fee, a $300 valuation fee upfront, then $250 per progress inspection across six drawdowns. That's $2,100 in fees before accounting for interest. For a self-employed borrower building a custom home in Sydney, these costs should be included in your total project budget, not treated as an afterthought. Many contractors assume the loan amount covers everything, but fees are often deducted from drawdowns or billed separately.
If you're using refinancing to fund part of the build by pulling equity from an existing property, the construction loan may be structured as a top-up with separate fee arrangements. This is common for contractors who own their home and want to build an investment property or a new primary residence without selling first.
When Construction Loans Convert and What Happens to the Rate
Once the build reaches practical completion and you receive an occupancy certificate, the construction loan converts to a standard home loan. At that point, you can choose to remain on a variable rate, fix for a set term, or split between fixed and variable. The rate you were charged during construction doesn't automatically carry over, especially if you were on a variable rate and market conditions have changed.
Some lenders offer a discounted rate during construction, then revert to a higher standard variable rate after conversion. Others apply the same rate throughout. When you're comparing construction loan options at the application stage, ask what the post-construction rate will be and whether you're locked into that lender or free to refinance without penalty once the build is complete.
For self-employed borrowers, the conversion point is also when your repayments shift from interest-only to principal and interest, unless you've negotiated an extended interest-only period. Your cash flow will change, so factor that into your budgeting from the start. If you've built an investment property, rental income should cover most or all of the repayment. If it's your primary residence, your income needs to service the full loan without the temporary relief of interest-only payments.
Call one of our team or book an appointment at a time that works for you. We'll help you compare construction loan rates, structure your application to suit your self-employed income, and make sure the loan terms align with your build timeline and long-term plans.
Frequently Asked Questions
How is interest calculated on a construction loan?
Interest is charged only on the amount drawn down at each stage of construction, not the full approved loan amount. As the lender releases funds for each progress payment, your loan balance and monthly interest repayment increase accordingly.
Can I fix the interest rate during the construction phase?
Most lenders offer variable rates during construction, with the option to fix once the build is complete and the loan converts to a standard home loan. Some lenders allow you to fix from the start, but this is less common and may come with higher rates or restrictions.
What fees are charged on construction loans besides interest?
Construction loans typically include a Progressive Drawing Fee of $200 to $400 per drawdown, valuation fees for progress inspections, and sometimes an application fee. These fees are separate from the interest rate and should be factored into your total project budget.
What happens to my construction loan rate once the build is finished?
Once the build reaches practical completion, the construction loan converts to a standard home loan. At that point, you can choose to remain on a variable rate, fix for a term, or split between fixed and variable, depending on your lender's options.
Do self-employed borrowers face different construction loan rates?
Self-employed borrowers are assessed using the same rate structures as other applicants, but lenders require additional income documentation such as two years of tax returns and business financials. The rate itself is typically the same, but approval depends on demonstrating consistent serviceability.
