How much your business can borrow comes down to what your cash flow can comfortably service, not a single number a calculator spits out. Lenders test whether your trading covers the new repayment on top of your existing commitments, then factor in the loan type, any security you offer and your credit profile. A useful rule of thumb: think in terms of what you can service, because that is what a lender is really deciding.
This guide explains what drives your borrowing capacity, why serviceability matters more than turnover alone, and how the answer differs between secured and unsecured finance. 121 Brokers is a broker, not a lender, so nothing here is an approval or a promise. Any figure you land on is indicative until a lender assesses your file.
What decides how much your business can borrow?
Four things do most of the work, and they interact rather than sit in isolation.
- Serviceability. Can the business comfortably meet the new repayment out of its cash flow, alongside what it already pays? This is the single biggest driver.
- Security. Offering an asset generally lifts the amount available, because the lender has something to recover against.
- Trading history and turnover. A longer, stronger track record gives a lender more confidence to lend more.
- Credit profile. A clean file widens the field of lenders and the amounts they will consider.
Notice that turnover is only one of these. Two businesses with the same revenue can have very different borrowing capacity if one carries heavy existing repayments and the other is debt-free. Capacity is about headroom, not just income.
Serviceability: what you can service, not what you can request
Serviceability is the heart of the assessment. A lender looks at your income, subtracts your existing commitments and running costs, and asks whether what is left comfortably covers the proposed repayment, usually with a buffer on top in case rates or conditions move. You can ask for any amount you like; you will be offered what your cash flow supports.
This is why the honest answer to "how much can I borrow" is another question: how much can you comfortably repay? Starting there protects the business. Borrowing the maximum a lender will stretch to can leave no room for a quiet quarter, and around one in five SMEs reported difficulty with finance in 2025 (RBA Bulletin, October 2025), with cash-flow pressure a common theme. The amount that fits your cash flow is almost always a better decision than the largest amount available.
Estimate your indicative borrowing power
A quick way to sense-check capacity is to work backwards from a repayment you are comfortable with, rather than forwards from a number you hope to borrow. Enter a repayment your cash flow can absorb and see the indicative loan amount it maps to:
Read the result as indicative only. It is a planning aid, not an offer or a pre-approval, and it does not consider your full circumstances or any lender's specific criteria. It shows the shape of what a comfortable repayment could support; a lender decides the actual amount after assessing your file. To then estimate the interest and repayment schedule on a given amount, use our business loan repayment calculator.
Secured vs unsecured: how the amount changes
The security question moves the number more than almost anything else.
An unsecured loan is assessed mainly on your trading, so the amount is generally tied to the strength and consistency of your cash flow. As a broad market pattern, unsecured facilities tend to sit at smaller amounts than secured ones, because the lender has less to fall back on. A secured loan, backed by property or another asset, can support a materially larger amount and a sharper rate, because the security reduces the lender's risk. The trade-off is a valuation, more paperwork and the asset being on the line. Which suits you depends on how much you need and whether you have usable equity to offer. Our secured vs unsecured guide sets out the full comparison.
How the finance type changes your capacity
Borrowing capacity is not one number across every product, because different facilities are assessed and structured differently.
- Equipment and vehicle finance is often assessed partly on the asset itself, so the amount can track the value of the equipment or vehicle you are buying.
- Invoice finance scales with your sales ledger rather than a fixed limit: the more you invoice creditworthy customers, the more funding is available. See how invoice finance works.
- A line of credit gives you a revolving limit set against your trading and any security, drawn on as needed. See how a business line of credit works.
- An unsecured term loan is a lump sum sized to your serviceability.
So "how much can I borrow" partly depends on which tool fits the job. Matching the product to the purpose often unlocks more usable funding than pushing a single product to its limit.
How to strengthen how much you can borrow
A few things genuinely move your capacity. Clean, consistent trading through the business account is the biggest lever, because it is the evidence a lender leans on. Reducing or consolidating existing repayments frees up serviceability headroom, which is one reason some owners look at business debt consolidation before seeking new funds. Offering security, where you have it, lifts the ceiling. And presenting a complete, well-prepared file to the right lenders avoids the wasted applications that can dent a credit profile.
To see what your trading realistically supports across a lender panel, start on the business loans hub or compare your options with a broker. We will give you an indicative range grounded in your actual numbers, not a headline figure.
General information only: not financial, legal or tax advice, and it does not take account of your objectives, financial situation or needs. 121 Brokers arranges business-purpose finance only and is a broker, not a lender. Any amounts, rates, fees or timings mentioned are broad market guides, not quotes or offers. Approval, borrowing limits, rates, fees and timing are determined by the lender and are subject to its assessment criteria. Broker remuneration is disclosed to you before you proceed.
