Top Strategies to Finance a Commercial Office Building

Secured Business Loans Give You Control Over Equity

A secured business loan uses the commercial property itself as collateral, which typically delivers lower interest rates and higher loan amounts than unsecured options. Most lenders will finance 60% to 70% of the property value, though some will extend to 80% for established businesses with strong financials.

Consider a consulting business owner purchasing a $1.2 million office building in Subiaco. With a 30% deposit of $360,000, the loan amount sits at $840,000. The lender secures the loan against the building, and because the property generates rental income from tenants or eliminates the business's lease payments, the debt service coverage ratio supports the borrowing. The buyer retains $140,000 in working capital rather than committing the full purchase price, which keeps the business liquid for operations and unexpected expenses.

The interest rate on a secured business loan typically runs 1% to 2% below unsecured business finance because the lender holds a registered mortgage over the asset. That difference compounds over a 15 or 20-year term. The property also builds equity as it appreciates and the principal reduces, creating a wealth asset separate from the business's trading operations.

The Loan Structure Shapes Your Cash Flow for Years

Commercial loans offer principal and interest or interest-only repayments, and the choice determines how much cash you need each month. Interest-only terms usually run for one to five years before reverting to principal and interest, which keeps early repayments lower while you stabilise the purchase or complete fit-out work.

A buyer purchasing a $900,000 office building in East Perth with a $630,000 loan might choose a three-year interest-only period. At a variable interest rate of 6.5%, the monthly repayment sits around $3,412 during the interest-only phase. When the loan reverts to principal and interest over the remaining 17 years, repayments increase to approximately $5,200 per month. That initial saving allows the buyer to fund renovations or hold cash for tenant incentives without stretching the business.

Flexible repayment options matter when income fluctuates. Some lenders allow additional repayments on variable loans with full redraw, so you can pay down the loan faster during profitable periods and access that capital if working capital tightens. Fixed interest rate loans lock certainty but often restrict extra repayments and remove redraw access entirely.

Variable Versus Fixed Rates Depends on Rate Outlook and Cash Certainty

Variable interest rates move with the market, which means your repayment can increase or decrease during the loan term. Fixed interest rates lock your repayment for one to five years, giving certainty but removing flexibility. Most commercial buyers split the loan between fixed and variable portions to balance both needs.

If you expect rates to rise and your cash flow is tight, fixing 50% to 70% of the loan protects you from repayment shock while keeping some flexibility on the variable portion. If rates are falling or you plan to make additional repayments, a higher variable portion makes sense. The fixed rate typically sits 0.2% to 0.5% higher than the variable rate at the time of settlement, so you pay for certainty.

When purchasing commercial property in Perth, where office vacancy rates and tenant demand vary by precinct, having access to redraw on part of the loan gives you room to adjust if leasing takes longer than expected or if you need to offer rent-free periods to secure tenants.

Lender Assessment Focuses on Property Income and Business Strength

Commercial lenders assess the debt service coverage ratio, which compares the property's net income to the loan repayment. Most lenders want a ratio of at least 1.2, meaning the property income covers 120% of the repayment. If you occupy the building yourself, they assess your business financial statements and cash flow forecast to confirm you can service the debt.

You'll need to provide a business plan, at least two years of business financial statements, and recent management accounts. If the business is structured as a company or trust, personal guarantees are usually required. Lenders also review your business credit score, and any defaults or late payments can reduce your loan amount or increase the interest rate.

For self-employed buyers, proving income stability matters more than it does for residential lending. A business with declining revenue or irregular cash flow will face higher scrutiny, even if the property shows strong rental yield. The lender wants confidence that the business can weather downturns without defaulting on the loan.

Deposit and Settlement Costs Add 35% to 40% of the Purchase Price

Most commercial lenders require a 20% to 40% deposit, depending on the property type and your financial position. Settlement costs include stamp duty, legal fees, building inspections, valuation fees, and lender establishment fees. In Western Australia, stamp duty on commercial property runs at 5% for amounts over $500,000, which is a substantial upfront cost.

If the purchase price is $1 million, expect to contribute $200,000 to $400,000 as a deposit, plus another $60,000 to $80,000 for stamp duty and settlement costs. That total outlay of $260,000 to $480,000 needs to come from genuine savings, business reserves, or equity in other assets. Some buyers use refinancing on residential investment property to access deposit funds without draining the business account.

Lenders distinguish between cash savings and borrowed deposits. If you take out an unsecured business loan to fund the deposit, it weakens your debt service coverage ratio and reduces your borrowing capacity for the main loan. The most sustainable approach is to build the deposit over time or leverage existing property equity through a secured facility.

Loan Approval Timeframes Range from Two Weeks to Two Months

Fast business loans exist, but commercial property finance rarely qualifies as express approval. Lenders need time to value the property, assess lease agreements if tenants are in place, review your business financials, and confirm the building's condition and zoning. The process typically takes three to six weeks from application to formal approval.

If you're buying at auction or under a short settlement clause, arrange conditional approval before you commit. That means submitting your business plan, financial statements, and property details to a lender early so they can assess your position and confirm the loan amount in principle. The formal valuation and final credit assessment happen after you exchange contracts, but you enter the purchase with confidence that finance will settle.

Working with a broker who has access to business loan options from banks and lenders across Australia reduces approval time because they match your scenario to the right lender upfront rather than applying broadly and waiting for declines.

Owner-Occupied Buildings Deliver Tax Benefits and Eliminate Rent

When you purchase a commercial office building and occupy it for your business, the loan interest is tax-deductible, and you eliminate ongoing lease payments. That shift converts a business expense into wealth accumulation. You also control fit-out decisions, building improvements, and lease terms if you sublet part of the space.

An accounting firm paying $48,000 per year in rent could redirect that amount toward loan repayments on a $900,000 property. Over 20 years, the rent saved exceeds $960,000, and the building appreciates in value while the loan principal reduces. The firm also claims depreciation on the building and fit-out, which reduces taxable income and improves cash flow.

The trade-off is reduced liquidity. Capital tied up in property can't be deployed elsewhere, and if the business needs to relocate, selling commercial property takes longer than ending a lease. For established self-employed buyers with stable income and long-term plans in one location, ownership builds wealth faster than renting.

Progressive Drawdown Suits Properties Requiring Fit-Out or Renovation

A progressive drawdown loan releases funds in stages as renovation or fit-out work is completed, rather than advancing the full loan amount at settlement. This structure suits buyers purchasing older office buildings that need refurbishment before they're tenantable or functional for the business.

You settle the purchase with an initial drawdown, then request further funds as invoices for construction, electrical, plumbing, or fit-out are verified. The lender inspects progress before releasing each tranche, which protects both parties and ensures the work is completed to standard. Interest is charged only on the drawn amount, so you're not paying for funds sitting idle.

This approach requires accurate cash flow forecasting because you need to fund the work upfront or negotiate payment terms with contractors until the lender releases each stage. The loan structure ties directly to the project timeline, so delays in construction extend the period before the property generates income or becomes usable.

Prepayment of Loan Principal Accelerates Equity and Reduces Interest

Most variable interest rate loans on commercial property allow unlimited additional repayments with full redraw access, which gives you flexibility to reduce the loan faster during strong trading periods. Paying an extra $1,000 per month on a $700,000 loan can reduce the loan term by several years and save tens of thousands in interest.

Redraw means you can access those extra payments if cash flow tightens or an opportunity emerges that requires working capital. That access makes the loan function partly as a revolving line of credit, though the property remains the security and the interest rate stays lower than an unsecured facility.

Fixed rate portions of the loan typically restrict additional repayments to $10,000 or $20,000 per year without penalty. Exceeding that limit triggers break costs, which are calculated based on the lender's cost of unwinding the fixed rate hedge. If you plan to make large lump sum payments, structure more of the loan as variable or wait until the fixed term expires.

Call one of our team or book an appointment at a time that works for you to discuss how a commercial loan for an office building fits into your wealth strategy and what structure makes sense for your business and cash flow position.

Frequently Asked Questions