BBSY Explained: The Base Rate Behind Commercial Lending, and Why It Matters Which Rate You're On

Ask most business owners what interest rate they pay and they'll give you one number. Ask them how that number is built, and what it's linked to, and the answer is usually less clear.

That matters. Every commercial loan has a base rate underneath it. On larger facilities, that base is BBSY, a market rate no bank controls. On smaller loans, it's usually a reference rate the bank sets itself. The difference decides how transparent your pricing is, and how much room your bank has to change it.

What Is BBSY?

BBSY stands for the Bank Bill Swap Bid rate. It's a benchmark for what it costs banks to borrow short-term money in the wholesale market, published every business day for terms from one to six months. It's based on BBSW, the mid-market bank bill rate calculated by the ASX from actual market trading, with BBSY sitting slightly above it (BBSW plus 5 basis points).

Because it comes from the market rather than from any one bank, BBSY is the same for every lender and every borrower on a given day. Anyone can check it. It moves with interest rate expectations, so it generally tracks the RBA cash rate, though not exactly. The 90-day rate is the one most commercial facilities use. For how the rate is set each morning, how it is regulated and where to check it, see how BBSY is set each day.

How a BBSY Facility Is Priced

A BBSY-based loan, often called a market rate or bill facility, is priced in three parts:

• BBSY. The base rate, set by the market. It resets at the start of each rollover period, usually every 30, 90 or 180 days, depending on the term you choose.
• Margin. The bank's charge for lending to you, reflecting your risk, security and the bank's appetite. It's fixed in your facility agreement and only changes at review or if you renegotiate.
• Line fee. A fee charged on the full facility limit, whether you've drawn it or not. Some banks build this into a single margin. Others show it separately.

Here's an illustrative example for a $5 million facility:

Figures are illustrative, not a quote. The point is the structure: only the margin and fees are the bank's to set, and both are written into your facility agreement.

Why BBSY Pricing Protects You

• Transparency. You can see exactly what you're paying above the market. If BBSY rises, your rate rises by the same amount, and no more. If it falls, you get the full benefit at your next rollover.
• The bank can't move the base. The bank's share of your rate is the margin, and that's locked in your facility agreement until review.
• Easy comparison. Every lender prices off the same benchmark, so in a tender you're comparing margins and fees like for like. The Glenclair Pricing Index shows typical margins over BBSY by asset class, gearing and lender tier.
• Hedging. Because BBSY is a market rate, you can fix it with an interest rate swap or cap, separately from the loan. That gives you rate certainty without locking yourself into a fixed-rate loan with the same bank. See hedging BBSY for worked examples.

If You're Not on BBSY, the Bank Sets Your Base Rate

Smaller business loans are usually priced off the bank's own reference rate, such as a business variable rate, base lending rate or business indicator rate, plus or minus a margin. The bank sets that reference rate itself, and can change it at its discretion.

That gives the bank far more control over what you pay:

• The rate can move without a cash rate change. Banks have, at times, lifted business reference rates out of step with the RBA, citing higher funding costs.
• Cuts aren't always passed on in full. When rates fall, there's no guarantee your reference rate falls by the same amount, or at the same time.
• It's hard to see the bank's real margin. When the base rate is set by the bank, you can't easily tell how much of your rate is market cost and how much is bank margin.
• Comparisons are harder. Each bank's reference rate is different, so comparing offers takes more work.

Being on a bank-set rate doesn't mean you're being overcharged. It means your bank has more room to move your rate, and you have less visibility over whether it's fair. That's exactly why it should be tested against the market regularly. See accountability for lenders.

The $2 Million Threshold

BBSY facilities are generally reserved for larger borrowers. Most banks offer BBSY pricing on facilities from around $2 million upwards. Below that, they usually price off their own reference rates. The exact cut-off varies by bank and by product. Some will go lower for strong clients, and some set a higher bar.

If your total lending is near or above $2 million and you're still on a bank reference rate, ask why. Moving to BBSY-based pricing is often achievable at your next review, or as part of a refinance. Combining facilities with one lender can also lift total lending above the threshold.

Questions to Ask Your Bank

• Is my loan priced off BBSY, or off the bank's own reference rate?
• What is my margin over that base rate, and when is it next reviewed?
• What line fees, activation fees or other charges apply to the limit?
• What rollover period am I on, and are there break costs if I repay early?
• If my lending is over $2 million, why am I not on BBSY pricing?

Things to Watch on a BBSY Facility

• Break costs. Repaying or refinancing in the middle of a rollover period can trigger break costs. Time any refinance to the end of a rollover where possible.
• Hedging requirements. Some banks require part of a larger facility to be hedged. Check the terms and the cost of exiting a swap early.
• Line fees on unused limits. You pay the line fee on the full limit, so don't carry more limit than you need.
• Review dates. The margin is only fixed until review. That's the moment to negotiate.

How We Help

We break down your current pricing into base rate, margin and fees, so you can see exactly what you're paying the bank. For larger facilities, we tender on BBSY margins across our panel of 60+ lenders. Where your lending is close to the threshold, we look at whether a restructure can move it onto BBSY pricing. Learn more about how a banking tender works, our commercial refinance service and mid-market commercial finance.

Book a free, no-obligation consultation and we'll show you how your current rate is built and whether it reflects the market.