Investment Borrowing Power 2026: Capacity & Serviceability Guide
If you’re planning to invest in property, understanding how much you can borrow is one of the first steps. The challenge is that what you expect to borrow and what a lender will approve can be very different, particularly as lending rules become more restrictive.
In 2026, borrowing capacity is no longer based on income alone. Lenders assess a combination of your financial position, existing debt and internal policy limits, which means the amount you can borrow may differ from simple calculator estimates.
In this guide, we’ll talk about how borrowing capacity is assessed, why calculator estimates can differ from real outcomes and what factors can influence how much you are able to borrow.
Understanding Borrowing Capacity
Each lender assesses your borrowing capacity differently, relying on a number of factors to determine your financial health, including:
Income: Lenders assess your employment type, income stability and any additional income streams. Higher and more consistent income can support how much you are able to borrow, but it is assessed alongside your overall debt and financial position.
Current assets: Lenders also look at how much money you have in the bank as savings along with other assets, including equity in any existing property you own.
Living expenses: Lenders review living expenses as well as any business liabilities that may impact your financial circumstances.
Commitments: Lenders look at current debts, credit cards, expenses and other financial commitments that could impact how much you can borrow.
Credit history: Lenders look at your credit score to determine whether you've had any trouble with borrowing or making repayments in the past.
Lenders operate within regulatory guidelines and internal policies designed to manage risk. This means borrowing capacity is not only based on what you can afford to repay, but also on what a lender is willing to approve under current lending conditions.
Calculating Your Borrowing Capacity
Borrowing capacity is typically calculated using a serviceability assessment, where lenders compare your income against your expenses and existing debts. They also apply an interest rate buffer, assessing your ability to repay the loan at a higher rate than what is currently offered.
A Loan-to-Value Ratio (LVR) is another factor lenders consider when assessing risk. It compares the size of your loan to the value of the property and is influenced by your investment property deposit. For example, if you're buying a house for $100,000 and borrow $80,000, your LVR is 80%. The lower the LVR, the less risky it is for the lender.
How much can I borrow for an investment property? A borrowing capacity calculator explained
Many investors start with a borrowing capacity calculator to get an estimate. While useful, these tools often overestimate what you can borrow because they rely on simplified assumptions and do not account for lender-specific policies, debt-to-income limits or how credit is allocated across a lender’s portfolio.
In practice, lenders assess more than just what you can afford to repay. They also consider your overall financial position, including how your total debt compares to your income. This is known as your debt-to-income ratio, which plays a key role in how lenders assess risk and determine how much they are willing to approve.
From 1 February 2026, regulatory limits require lenders to restrict the proportion of new loans with a debt-to-income ratio above six times income to around 20%. As a result, borrowing at higher debt levels is more tightly controlled and, in some cases, applications above seven times income may be declined even if standard serviceability requirements are met. This means your actual borrowing capacity is influenced not just by your income and expenses, but also by how your application fits within lender limits and broader credit conditions.
Boosting Borrowing Capacity
There are a number of ways to boost borrowing capacity, including:
Exploring joint loan applications, where two or more people apply for a loan together
Reducing expenses and existing debts before applying for loans
Taking steps to enhance your credit score and increase your income
Including rental income can support your borrowing capacity, although lenders typically only use a portion of that income. For example, a property generating around $680 per week in rent can still contribute meaningfully to your assessable income and improve the income side of your debt-to-income position, particularly in markets such as Perth.
More experienced investors may also consider non-bank lenders, which operate under different regulatory settings and can offer flexibility in certain scenarios, depending on individual circumstances.
Manage Your Borrowing Capacity with Help From Motivate Property Group
Whether you’re purchasing your first investment property or expanding your portfolio, Motivate Property Group can help you navigate borrowing options with clear, personalised guidance. As a professional mortgage broker in Perth, we manage the lending process from start to finish, so you don’t have to deal with the complexities all on your own.
Understanding your borrowing capacity, investment property loan options and investment property deposit requirements is only part of the process. We structure your lending to support future growth and maintain flexibility as your portfolio evolves. Speak with Motivate Property Group to take the next step with a plan that fits your goals.