Top Strategies to Fund a Build as a Sole Trader

A construction loan releases money in stages as your build progresses, so your preparation needs to match that structure. For sole traders, the main task is proving stable income and planning cash flow before the first payment falls due.

This article is for sole traders weighing up a building loan for a new home. It covers how drawdowns work, what lenders look at in your income, and how to plan for the repayment shift that starts once drawing begins.

How Does a Construction Loan Work?

A construction loan is paid out in stages as work is completed, rather than as one lump sum. Lenders set their own terms for the number of drawdowns, inspections, fees and time limits, so these differ from lender to lender.

The usual pattern follows the building contract. Your builder claims a progress payment at the end of a stage. The lender then releases funds, often after checking the work. As an example, a stage might be the base, frame, lock-up or fixing. Interest is generally charged on the amount drawn, not on the full approved limit, which keeps early repayments lower. Check with your lender whether a fee applies to each drawdown.

The trade-off is timing. Each claim needs paperwork and sometimes an inspection, and a delay on either side can hold up your builder. Building Commission NSW gives $250 to $500 as an indicative cost for each independent progress inspection, where you commission one.

What Do Lenders Look at for Sole Trader Construction Finance?

Lenders assess a sole trader on documented, stable income, and they test whether you could still meet repayments if the interest rate rose. Banks regulated by APRA must assess new borrowers at a rate at least 3 percentage points above the loan rate.

Income that varies is treated with more caution. APRA guidance says a prudent lender would apply discounts of at least 20 per cent to less stable income such as bonuses or overtime. For self-employed borrowers, lenders set their own documentation and income-history requirements, which vary by lender. Your tax and BAS records need to be current before you apply.

A useful point for builders of new dwellings: the debt-to-income limit APRA applies to lenders from 1 February 2026 exempts finance for constructing new dwellings. That exemption does not remove the serviceability assessment above. You still need to show you can service the debt.

A broker can help you work out which lenders suit your income structure. See our construction loans page for how we approach this, or our home loans page if you are comparing the wider options.

Illustrative Repayments: Why They Rise During the Build

Repayments start small and grow with each drawdown, because interest applies only to the money released so far. NSW Government guidance says a borrower financing a project home starts repayments once the first progress payment is made and drawing begins.

Consider a sole trader who has approved funding of $600,000 and is paying a builder in stages. At an illustrative rate of 6.75% p.a., interest on $100,000 drawn is $6,750 a year, or about $562.50 a month. Once $400,000 is drawn, interest on that balance is $27,000 a year, or $2,250 a month. At the full $600,000 it reaches $40,500 a year, or $3,375 a month. These are interest-only figures at the same illustrative rate, and your lender's actual rate and terms will differ.

The outcome of mapping this out in advance is a clear cash flow plan. The sole trader sets aside a buffer from business income before the frame stage, when drawn amounts climb, rather than discovering the monthly figure mid-build. The risk is that lower early repayments can make the build feel cheaper than it is. Use a repayment calculator before you commit.

Fixed Price Building Contract or Cost Plus Contract?

A fixed price building contract sets the total price up front, while a cost plus contract charges actual costs plus a margin. Fixed price gives certainty for your loan amount. Cost plus can finish cheaper or dearer, and that uncertainty is harder for a lender to approve against.

The trade-off with fixed price is that variations you request later can add cost. With cost plus, the total can move as materials and trades are paid, which makes it harder to hold a firm budget. Lenders typically want to see a signed contract and plans before approval, so ask your broker which format a lender prefers before you sign.

How Progress Payment Schedules Are Limited by State Law

Most states and territories limit the deposit a builder can ask for and require progress payments to relate to work done. The ACT has no statutory deposit limit. These rules protect you, and your lender's drawdown schedule needs to align with them.

In New South Wales, the maximum deposit is 10 per cent. In Queensland it is 5 per cent for contracts of $20,000 or more. In Western Australia the limit is 6.5 per cent for contracts from $7,500 to $500,000. In Victoria, under the current rules for contracts before 31 March 2027, the deposit cannot exceed 5 per cent for contracts of $20,000 or more. South Australia, Tasmania and the Northern Territory also have their own rules, so check the requirements for your jurisdiction. A builder must also hold the required home warranty or indemnity insurance and give you a certificate before asking for payment in several states.

A Queensland example shows the practical limit. A contractor cannot claim more than 50 per cent of the contract price, including the deposit, until at least 50 per cent of the on-site work is complete. Paying ahead of work done can also reduce your insurance protection, so do not pay early to please a builder. Confirm your state's rules with the relevant building regulator before signing.

Grants and Tax Points for Sole Traders Building a Home

First home owner grants can apply to new builds, and the amounts and value caps vary by state. In New South Wales the grant is $10,000, and for vacant land with a building contract the combined value of land, contract and variations must not exceed $750,000. Applications tied to a first drawdown are lodged through the approved agent providing the finance.

If you are building to rent out, the tax position differs. The ATO says interest on a construction loan can be claimed where it relates to building the rental, while interest on a land loan generally cannot be claimed while the land remains vacant. Where one loan funds both, interest must be apportioned. Whether you can claim anything depends on your circumstances, so speak with your accountant before you decide on a loan structure. Our investment loans page covers the lending side, and our first home buyers page covers eligibility for first-time builders.

Preparing Your Application Before You Sign a Contract

The strongest applications arrive with the plans, council approval, builder quote and income records already aligned. Lenders assess the contract against the value of the finished home, so gaps between these items cause delays.

The loan amount also counts any undrawn committed funds in the lender's loan-to-value calculation, and the property value is independently appraised. A higher loan relative to value can attract extra cost, such as lenders mortgage insurance, depending on your deposit and lender. Raise this with your broker early, ideally before you commit to a builder or a land purchase.

Call one of our team or book an appointment at a time that works for you. We will review your income evidence, your contract and the drawdown schedule, then match your build to lenders that suit a sole trader.

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