The RBA just hiked again. Cash rate to 4.10%, effective 18 March 2026. Second 25 basis point rise in two months. A split five-four decision, meaning even the board couldn't agree on whether this was the right call.
Every headline you'll read today is about mortgages. An extra $161 per month on a million-dollar home loan. Borrowing capacity reduced by $30,000 to $40,000. Tough news for homeowners.
But here's what nobody is calculating: the actual dollar cost to your business.
For a typical Australian SME turning over $2 million with 15 staff, this rate cycle is quietly draining an extra $29,000 to $43,000 this year alone. That's enough to wipe out a full-time junior salary or three to four months of cash runway. And if rates go higher in May (all four major banks are now predicting another hike), that number climbs toward $50,000.
This article breaks down exactly where that money goes, line by line, so you can see the real cost and do something about it before it compounds.
The Reserve Bank's Monetary Policy Board increased the cash rate target by 25 basis points to 4.10% on 17 March 2026. This follows the February 2026 hike from 3.60% to 3.85%, which itself reversed three cuts made during 2025.
In plain terms: the brief relief businesses felt during mid-2025 is completely gone. We're now 50 basis points higher than the mid-2025 trough and climbing.
The board's reasoning was direct. Inflation picked up materially in the second half of 2025, partly reflecting greater capacity pressures. The labour market tightened. Private demand strengthened more than expected. And the conflict in the Middle East has pushed fuel prices sharply higher, adding further inflation risk.
Governor Bullock was blunt in the press conference: adjusting the cash rate is the "only instrument" the RBA has, and allowing inflation to become embedded would produce a "much worse outcome" for everyone.
For business owners, the critical takeaway is not just this single hike. It's the direction. ANZ, CBA, NAB, and Westpac all currently predict another 25 basis point increase at the May meeting. CBA describes it as a "line ball decision." NAB is firmer, expecting another rise and warning further increases could follow if inflation stays stubborn.
If May delivers another hike to 4.35%, we'll have seen three consecutive increases in four months, something not seen since early 2023.
The mortgage headlines give you a useful proxy: every 25 basis point increase adds approximately $161 per month to repayments on a $1 million loan. But business lending carries a commercial premium, and the impact extends well beyond a single loan.
Here's the full picture across five cost categories, using a typical $2 million revenue, 15-staff Australian SME as the benchmark.
Most SMEs carry some form of equipment or asset finance. A $500,000 equipment loan is common for businesses in trades, manufacturing, logistics, or healthcare.
At the mid-2025 trough, your variable rate on that loan was approximately 5.75%. Today, with the cash rate at 4.10% and commercial lending margins, you're looking at approximately 6.25% or higher depending on your risk profile and lender.
That 50 basis point increase adds approximately $2,500 per year in additional interest on a $500,000 facility. Over a five-year loan term, that's $12,500 extra you weren't budgeting for when you signed the loan.
If the May hike comes through at another 25 basis points, add another $1,250 per year, bringing the total annual increase to $3,750 compared to where you were eight months ago.
These numbers scale linearly. A $300,000 loan costs an extra $1,500 per year. A $750,000 facility costs an extra $3,750. Whatever your equipment book looks like, multiply accordingly.
Variable overdraft rates track the cash rate more closely than term loans. A $200,000 overdraft facility that was costing you 6.00% at the mid-2025 trough is now 6.50% or above.
The direct interest cost increase is approximately $1,000 per year on a $200,000 facility.
But that's the small part of this equation.
From 1 July 2026, Payday super takes effect. Super contributions must be paid at the same time as wages, within seven business days. No more sitting on a quarter's worth of super and using that cash as a working capital buffer.
For a 15-staff business with a $1 million annual payroll, the quarterly super float that many owners have quietly relied on represents approximately $30,000 in cash that previously sat in your account for up to three months. Spread across the year, that's $80,000 to $120,000 in additional working capital pressure as the timing shifts from quarterly to every pay cycle.
The practical cash impact in the first year is more likely $8,000 to $12,000 in additional overdraft usage or alternative funding costs, depending on your pay cycle frequency and existing cash buffers.
Combined with the direct rate increase on your overdraft, you're looking at $9,000 to $13,000 in extra annual cost from this category alone.
Not sure how Payday Super will affect your specific payroll? Use our employee cost calculator to model the timing impact.
Most commercial leases in Australia include CPI-linked annual reviews or fixed percentage escalation clauses. With headline CPI at 3.8% for the year to January 2026 and the rate environment pushing landlords' own financing costs higher, your next rent review is going to hurt more than usual.
A business paying $5,000 per month in rent facing a 4.5% review (CPI plus a margin reflecting the landlord's cost pass-through) will see rent increase by approximately $2,700 per year.
This isn't directly caused by the RBA rate hike in the way a loan repricing is. But it's connected. Landlords with variable rate commercial mortgages are passing their own increased costs through reviews, and the CPI component is partly driven by the same inflationary pressures the RBA is trying to address.
For businesses on fixed percentage escalation clauses (commonly 3% to 4% per annum), the impact is more predictable but still compounds on top of every other cost increase.
This is the cost nobody puts on a spreadsheet, but it's often the biggest one.
Your suppliers are feeling the same squeeze you are. GoCardless's Pursuing Payments 2025 report, released in full on 11 March 2026, surveyed 500 Australian SMB owners and found that 69% had received late payments, up from 63% in 2024. Of those experiencing late payments, 41% are waiting more than 14 days past due. Almost half (48%) say payments are slower than they were 12 months ago.
The response from businesses under cash pressure is predictable: they tighten their own payment terms. Where you once had 30 days, you might now get 14. Where you had 60, you might get 30. Some suppliers are moving to payment on delivery or requiring deposits.
For a $2 million revenue business, the working capital impact of suppliers shortening terms from 30 days to 14 days across even half your supplier base can represent an estimated $15,000 to $25,000 in additional working capital you need to find. That cash has to come from somewhere, either your overdraft (at higher rates) or by delaying your own payments to other suppliers, creating a ripple effect through the supply chain.
This is the contagion problem. Late payments breed late payments. Thirty-four per cent of Australian SMBs turned to credit cards or loans in the past 12 months specifically because late payments impacted their cash flow. They're borrowing at 15% to 22% on credit cards to cover gaps created by customers paying slowly, while the RBA pushes the base rate higher. It compounds.
If late payments are already hurting your cash flow, use our payment reminder email drafter to automate the follow-up process and recover cash faster.
Stack these five categories together for a typical $2 million revenue, 15-staff Australian SME:
Equipment and asset finance: approximately +$2,500 per year
Overdraft and working capital (including Payday Super timing): approximately +$9,000 to $13,000
Commercial lease escalation: approximately +$2,700
Supplier terms tightening and working capital squeeze (estimated): approximately +$15,000 to $25,000
Total estimated annual impact: $29,200 to $43,200
That range covers the direct and indirect costs of the rate cycle for a business of this size. The lower end assumes modest exposure to variable rate debt and limited supplier disruption. The upper end assumes heavier reliance on working capital facilities and a supply chain where payment terms are actively shortening.
To put that in perspective: $43,200 is the annual cost of a full-time junior employee including super. It's three to four months of cash runway for many small businesses. And it arrived not as a single invoice you can see and manage, but as a slow accumulation across five different cost categories that individually seem manageable but collectively change the maths of your business.
If the May hike comes through (and all four major banks currently expect it will), add another $5,000 to $10,000 to the upper range, pushing total annual impact toward $50,000 or more.
For businesses already carrying ATO debt, the rate cycle hits twice. The ATO's general interest charge (currently 10.65% per annum for January to March 2026) compounds daily on outstanding obligations. And from 1 July 2025, that interest is no longer tax-deductible, making the effective cost of carrying $100,000 in ATO debt approximately $11,000 per year, up from approximately $8,250 when the deduction was available. That's a 33% increase in the real cost of owing the ATO money.
The ATO's total debt book now stands at over $105 billion, the highest on record. If your business is carrying any overdue ATO obligations on top of higher commercial lending costs, the compound burden is significant.
The rate environment is what it is. You can't control the RBA. But you can control how exposed your business is to rate movements and how quickly you respond.
Review your debt structure this week. If you have variable rate facilities, get quotes for fixed rate alternatives. The break-even calculation is straightforward: if you believe rates will stay at 4.10% or higher for the next two to three years, fixing now locks in certainty. If you think the May hike is unlikely and cuts will resume, staying variable is cheaper. The Big Four consensus suggests rates are more likely to go up than down in the near term, so at minimum, understand your options.
Run a 13-week rolling cash flow forecast. If you're not already doing this, start now. A monthly P&L won't show you the timing problem that kills businesses. Cash flow forecasting at a weekly level exposes the gaps before they become emergencies. Use our cash flow forecast calculator to help.
Contact your suppliers before they contact you. If you're a reliable payer, now is the time to lock in your current payment terms in writing. Suppliers are more likely to maintain 30-day terms for customers with strong payment histories than for those who've been stretching to 45 or 60 days. Negotiate from strength, not desperation.
Set up a Payday Super process now, not in June. The July deadline is 14 weeks away. If your payroll system isn't configured for same-pay-cycle super, fixing it under pressure in June will create errors. Talk to your payroll provider or BAS agent now and do a test run before the obligation kicks in.
Check your breakeven point. When costs increase by $30,000 to $40,000, your breakeven revenue shifts. Use our breakeven point calculator to see exactly how much additional revenue you need to cover the rate cycle cost, or how much cost you need to cut elsewhere to maintain the same margin.
Check when you'll run out of cash. If the compound effect is eating into your runway, you need to know how many weeks you have. Our when-will-I-run-out-of-money calculator gives you a clear answer based on your current burn rate and cash position.
How much does a 25 basis point rate hike cost a typical small business?
For a business with $500,000 in variable rate borrowings, a 25 basis point increase adds approximately $1,250 per year in direct interest costs. However, the indirect costs through supplier terms tightening, lease escalations, and working capital pressure typically add three to five times the direct interest impact. A $2 million revenue SME with 15 staff can expect a total annual impact of $29,000 to $43,000 from the current rate cycle.
Should I fix my business loan rate in 2026?
That depends on your view of where rates are heading and your tolerance for uncertainty. All four major Australian banks (ANZ, CBA, NAB, and Westpac) currently predict another 25 basis point increase in May 2026. If rates continue rising, fixing now provides certainty. If rates stabilise and eventually fall, you'll pay a premium for that certainty. The decision should be based on your cash flow sensitivity: if an additional $5,000 to $10,000 in annual interest would create genuine pressure, fixing provides insurance. If your margins can absorb further increases, staying variable preserves flexibility.
How does the RBA rate hike affect my commercial lease?
Most commercial leases in Australia include annual reviews linked to CPI or a fixed percentage escalation. While the rate hike doesn't directly change your lease terms, it influences CPI (which feeds into CPI-linked reviews) and increases your landlord's own financing costs, which they may pass through at the next market rent review. Expect your next review to reflect both CPI of approximately 3.8% and a tighter commercial property financing environment.
What is the Payday Super change and how does it affect my cash flow?
From 1 July 2026, employers must pay super contributions at the same time as wages (within seven business days of payday). Currently, super is due quarterly. This change removes the quarterly "float" that many businesses rely on as a working capital buffer. For a business with $1 million in annual payroll, this means approximately $30,000 per quarter that previously sat in your account for up to three months now leaves with each pay cycle. The cash flow impact depends on your pay frequency and existing buffers, but most businesses should expect $8,000 to $12,000 in additional working capital pressure in the first year.
How are late payments connected to interest rate increases?
When rates rise, businesses across the supply chain come under cash flow pressure simultaneously. Businesses that were already struggling to pay on time start paying even later. GoCardless research shows 69% of Australian SMBs now receive late payments (up from 63% in 2024), with 48% reporting that payments are slower than a year ago. This creates a contagion effect: your suppliers shorten their terms to protect their own cash, you need more working capital to maintain the same operations, and that working capital costs more because overdraft rates have also increased.
What's the total ATO debt for Australian businesses right now?
The ATO's total debt book has surged to over $105 billion, the highest on record. Of that, $46.4 billion is considered collectible, nearly double what it was in 2019. Small business makes up the majority of this debt. The ATO has significantly increased enforcement activity, issuing over 84,000 Director Penalty Notices in 2024-25, a 136% increase on the prior year. For businesses carrying ATO debt, the general interest charge (approximately 11% per annum) is no longer tax-deductible from 1 July 2025, making the effective cost of carrying ATO debt approximately 33% more expensive than it was previously.
Scale Suite delivers embedded finance and human resource services for ambitious Australian businesses. Our Sydney-based team integrates with your daily operations through a shared platform, working like part of your internal staff but with senior-level expertise. From complete bookkeeping to strategic CFO insights, we deliver better outcomes than a single hire, without the recruitment risk, training time, or full-time salary commitment.
If you're feeling the pressure of rising rates on your business cash flow, we can help you build a 13-week forecast, optimise your debt structure, and prepare for Payday Super before it hits. Drop the team a message or book a free 30-minute call.
We review and check articles periodically. At time of writing, all data and sources were current and accurate. The RBA cash rate of 4.10% was confirmed on 17 March 2026. Interest rate forecasts from the major banks reflect publicly available commentary as at 18 March 2026 and are subject to change. This article is general information only and does not constitute financial advice. Figures used in worked examples are illustrative based on typical scenarios and may not reflect your specific circumstances.
Sources:
RBA Monetary Policy Statement 17 March 2026; GoCardless Pursuing Payments 2025 (March 2026 full release); CommBank, Westpac, NAB, and ANZ rate commentary March 2026; ATO Annual Report 2024-25; Canstar rate analysis March 2026.
Scale Suite delivers embedded finance and human resource services for ambitious Australian businesses.Our Sydney-based team integrates with your daily operations through a shared platform, working like part of your internal staff but with senior-level expertise. From complete bookkeeping to strategic CFO insights, we deliver better outcomes than a single hire - without the recruitment risk, training time, or full-time salary commitment.
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