When rates move: what it really does to a small business

Most coverage of interest rates is written for people with a home loan. A business owner reads the same headline and has a different set of questions. What happens to my overdraft? Will my customers stop spending? Is now the time to fix something, or to refinance, or to hold off on that purchase?

The answers depend on what you owe, how it’s structured, and who buys from you. This guide takes the three channels in turn, puts the repayment maths in dollars, and ends with a short plan for the next move, whichever direction it goes.

What does the Reserve Bank actually change?

The Reserve Bank sets the cash rate, which it describes as the rate on overnight money-market loans. Changes to it ripple into other interest rates in the economy, which in turn change how borrowers and lenders behave, and eventually influence activity and inflation.

For a small business that has three practical consequences:

1. Your debt costs change, if the debt is variable or comes up for renewal.
2. Your customers’ budgets change, because their own mortgages, rents and loans reprice.
3. Your lender’s appetite changes, because its own funding costs and risk view shift.

Inflation is the backdrop. The ABS reported annual CPI of 4.0 per cent for the 12 months to August 2026, with the trimmed mean at 3.6 per cent, and the next release is scheduled for 28 October 2026. When inflation runs above the Reserve Bank’s comfort zone, the debate is about tightening. We cover the inflation side in how inflation affects business borrowing and the mechanics of the cash rate in how the RBA cash rate affects business loans.

How much does a rate move cost in dollars?

The direct maths is simple enough to do on the back of an envelope. Take the balance, multiply by the change, and you have the extra interest for a year.

Variable balance	A quarter of a percentage point	A full percentage point
$100,000	about $250 a year	about $1,000 a year
$400,000	about $1,000 a year	about $4,000 a year
$1,000,000	about $2,500 a year	about $10,000 a year

Those are interest-only figures on the full balance. On an amortising loan the dollar effect is a little different because the balance falls each month, but this gets you close enough to plan.

Notice what the table says. One move on a modest balance is annoying, not dangerous. A run of moves on a large balance, with thin margins, can change the business’s economics. The point to watch is the combination: how much variable debt you carry relative to the free cash left over after your costs. Our debt service coverage ratio glossary entry explains the measure lenders use for this.

What happens to customer spending?

This is the channel owners underestimate. Your own repayments rise by a few hundred dollars a month. Your customers’ might rise by more, and they cut back on whatever feels optional.

How it plays out varies by sector:

• Hospitality and retail. Discretionary spending softens first. Fewer meals out, smaller baskets, more discount-hunting.
• Trades and construction. Renovations and new builds slow as borrowing capacity shrinks, and quotes take longer to convert.
• Professional services. Clients delay projects and push back on fees, but contract work usually holds longer.
• Health, food and utilities-linked services. More resilient, because people keep paying for essentials.
• Importers. The effect arrives through the exchange rate and supplier terms as well as through local demand.

A useful exercise is to map your revenue by customer type and ask which customers are rate-sensitive. If 60 per cent of your sales come from households with mortgages, you’re more exposed than the interest on your own loan suggests.

For defensive planning, how to plan for a quiet month and how to cut business costs fast are good companions.

How do lenders respond when rates change?

Lenders adjust in several ways:

• Pricing. Variable products typically move with funding costs, though lenders decide the pass-through themselves.
• Serviceability. When assessing a new loan, lenders test your ability to repay, and many apply a buffer above the actual repayment. A higher-rate environment can reduce the amount a business can borrow on the same income. See what lenders mean by serviceability.
• Appetite. Some lenders tighten on sectors they see as exposed. Others see an opportunity. Your industry’s reputation matters.
• Product mix. Fixed terms, interest-only periods and offset features come and go.

Banks are frequently the cheapest funding available, and if your business fits their criteria it’s worth taking an offer seriously. If a bank has said no because its serviceability test has tightened, that isn’t a verdict on your business. It’s a reason to look at alternatives.

Should you fix, stay variable, or refinance?

There’s no universal answer. The table sets out the trade-offs.

Option	Strength	Weakness	Suits
Variable	Flexible, easier to repay early	Repayments move with the market	Strong cash flow, plans to repay soon
Fixed for a term	Certainty for budgeting	Break costs if you exit early, less flexibility	Thin margins, long-hold debt
Split	Part certainty, part flexibility	More paperwork, partial benefit either way	Owners who want to hedge their own uncertainty
Refinance	May reduce cost or fix structure	Fees, valuations, time	Debt that no longer suits the business

Read fixed or variable for a business loan for the detail, and when to refinance a business loan if you’re considering a switch. Before you leave any facility, check the early repayment savings and penalties. The break costs on a fixed term can outweigh the saving.

A worked example

Consider a landscaping business with a $350k variable property-secured loan and $120k of equipment finance on fixed terms. It turns over $1.4m and nets roughly $140k before owner drawings.

If the variable loan reprices by a full percentage point, interest on it rises by about $3,500 a year, around $290 a month. That’s manageable. The more important question is what happens to revenue. If householders postpone garden projects and sales fall 8 per cent, that’s $112k of lost turnover. Even at a modest margin on that work, the sales effect swamps the repayment effect.

The owner’s response should then be proportionate: build a buffer rather than lunge at a fix, shorten debtor days, trim the discretionary spend and keep a conversation open with the lender before any problem arrives. A cash buffer is usually a better first move than a complicated refinance.

What should you do now?

1. List every facility. Balance, type (fixed or variable), repayment, expiry date and security.
2. Calculate the sensitivity. Use the table above, or run your numbers in the business loan repayment calculator.
3. Stress-test cash flow. Model a repayment increase and a 5 to 10 per cent drop in sales together.
4. Identify the next decision point. Renewal, refinance, purchase or fixed-term expiry. That’s when your leverage is highest.
5. Talk to the lender early if the stress test fails. How to ask a lender for hardship help covers the approach.
6. Review pricing. If costs are rising, so should your prices where the market allows. See how to raise prices without losing customers.

If the stress test shows a gap, a quick enquiry is a low-effort way to find out whether an alternative structure could help.

Where to from here?

Rate cycles come and go. The businesses that handle them best aren’t the ones that predict them; they’re the ones with a buffer, a clear view of their debt and a lender who hears from them early.

If your structure no longer fits, whether that’s a facility that has repriced beyond what the business can carry, a bank that has pulled back or a renewal that’s coming up, we can help you explore the options. Enquiring takes about a minute and doesn’t touch your credit file. Your details don’t go to a crowd of lenders; a real person looks at your circumstances and rings you. Be as accurate as you can about balances, security and timing, so the right option comes up the first time.

See what a different structure could look like →