Should you top up your short-term business loan? The dollar test

You’re five months into a twelve-month loan. Repayments have gone through on time, every time. Then a supplier offers a bulk price, or a customer wants double the order, and you need another $40k. The lender’s reply is quick: “We can top you up.”

It sounds like a small step. Often it isn’t. A top-up on a short-term loan is usually a brand-new loan wearing the old one’s name. Whether it’s good value depends on a single subtraction most owners never do.

This guide shows you how to do it.

What actually happens when you top up a business loan?

Most short-term lenders don’t bolt new money onto an existing contract. They:

1. Pay out your current balance — including any charges the old contract applies to early payout.
2. Write a new loan for the old balance plus the new money.
3. Start a new term, with new fees, new documents and a new repayment amount.

Some lenders do a true increase — a variation that adds funds to the existing loan without resetting everything. That’s less common, and it’s worth asking for by name.

The structure matters because it decides which costs you pay twice. If your old loan charges a minimum amount of time-based cost on early payout, and the new loan charges an establishment fee on the full combined balance, you can end up paying fees on money you borrowed months ago.

How do you work out what the extra money really costs?

Here’s the subtraction:

Cost of the extra money = total cost of the top-up path − cost of finishing your current loan as it stands.

To fill it in you need two lists, both in dollars, both measured to the date you realistically expect to repay.

Path A — finish the current loan, no new money

• remaining time-based cost to the end of the term (or to your planned early exit);
• discharge or closing fees.

Path B — top up

• any early payout charge on the current loan (minimum interest, prepaid cost not refunded, early repayment fee);
• new establishment, documentation and legal fees;
• valuation or registration costs if security is re-taken;
• time-based cost of the new, larger loan to your realistic exit;
• discharge fees at the end.

Take Path A away from Path B. That figure — not the new repayment, not the headline fee — is what the extra $40k costs you. Divide it by the extra funds and you get the cost of every dollar of new money in cents. Then compare that with what the new money will earn or save.

Our payout figure guide explains how to get an accurate payout number for Path B, and the early repayment page covers the three ways contracts treat finishing early.

Illustrative example: a $40k top-up at month five

Illustrative figures only. They are not quotes and don’t reflect any particular lender.

A Brisbane wholesaler borrowed $100k over twelve months. At month five the balance is about $60k. They need $40k more for a stock order. Three options are on the table.

	Option 1: finish current loan	Option 2: top up to $100k, new 12-month term	Option 3: separate $40k loan over 6 months
Early payout charge on current loan	—	$1,500	—
New establishment and legal fees	—	$3,200	$1,600
Time-based cost from here	$4,200	$14,000	$4,200 + $3,400
Total from today	$4,200	$18,700	$9,200
Cost of the extra $40k	—	$14,500	$5,000

Why is Option 2 so much dearer? Three reasons:

• the establishment fee is charged on $100k, not on the $40k that’s new;
• the old loan’s minimum-cost clause costs $1,500 on the way out;
• the $60k already owed is now borrowed for twelve more months instead of seven.

That last point is the quiet one. A good share of the top-up’s cost has nothing to do with the new money at all. It’s the price of re-borrowing the old balance for longer.

Option 3 isn’t automatically the winner, though. For six months the wholesaler carries two repayments. If cash flow can’t take both, the cheaper option becomes the riskier one. The cost difference tells you what simplicity is worth — here, $9,500.

Now change one assumption. Suppose the old loan accrues daily with no minimum, and the lender charges its fee only on the new $40k and lets the term run to month twelve rather than resetting. The top-up’s extra cost could then land close to Option 3’s, with one repayment instead of two. Same business, same need, opposite answer. That’s why you run the numbers rather than going on feel.

You can test your own figures side by side in the short vs long term comparator.

If you’d like someone to lay out a top-up and the alternatives this way for your loan, start a 60-second enquiry. There’s no credit check to ask.

What should you ask the lender before agreeing?

Put these in an email and ask for written answers:

1. Is this a new loan that pays out my current one, or a variation of the existing loan?
2. What is the payout figure on my current loan today, and what part of it is an early payout charge?
3. Is the establishment fee charged on the full new balance or only on the new money?
4. Does the term reset? If so, to how many months?
5. What will the new repayment be, and on what rhythm?
6. Is new security, a valuation or a fresh guarantee needed?
7. What is the total dollar cost if I repay the new loan at month [X]?
8. Are there any fees not shown in the fee schedule?

Question three is the one that changes the answer most often. Some lenders will charge only on the new funds for an existing client with a clean record. You won’t know unless you ask.

When the new documents arrive, read them as a fresh offer — because they are one. Our clause-by-clause guide walks through what to look for, and the fees page explains each charge. If any fee or variation term looks out of proportion, ASIC’s guidance on unfair contract terms for small businesses gives useful examples, including default fees that go beyond what’s needed to protect the lender. It covers many small business contracts, generally where the business has fewer than 100 people or turnover under $10 million, and for financial products where the upfront price is up to $5 million.

Does a top-up change your exit?

Almost always. Before the top-up, your exit had to repay about $60k by month twelve. After it, the exit has to repay a larger balance at month seventeen — five months later than planned.

So check three things:

• Size. Does the planned exit — a refinance, a sale, a large receivable, trading surplus — still cover the bigger number with a buffer?
• Timing. Does the new due date still match when that money actually arrives? A property sale due at month twelve doesn’t help a loan due at month seventeen if the cash has been spent in between.
• Plan B. If the exit slips, what’s the fallback for the larger amount?

The exit strategy builder will rebuild your countdown around the new figures.

When is a top-up the right call — and when isn’t it?

It can make sense when:

• the new money has a clear purpose and its own payback — a stock order with known margin, a contract with signed terms;
• the old contract has fair early payout, so little is lost by closing it;
• the lender charges fees on the new money only, or the price of simplicity is small;
• you genuinely need a longer term on the whole balance anyway;
• one repayment is safer for your cash flow than two.

Think again when:

• you’re topping up to cover repayments on the same loan, or wages and tax that the business should be carrying;
• this is the second or third top-up, and the balance never really falls;
• the exit no longer covers the larger figure;
• the “cost of the extra money” is more than the new money will earn.

The first two are the classic shape of debt stacking — a loan that never ends, it just gets bigger. Our page on avoiding debt stacking explains how to break the cycle, and sometimes the honest answer is that a longer facility is the right tool. business.gov.au’s guidance on applying for a business loan is a useful reminder to compare options rather than take the first offer, and that applies to a top-up from your existing lender too. Our quote comparison page shows how to line them up fairly.

What about tax?

The ATO’s list of common business operating expenses includes interest on money borrowed to produce assessable income, and bank fees and legal costs of borrowing. So a top-up used for business purposes is generally treated the same way as the original loan. Two practical points: keep a record of what the new money was spent on, and don’t let private spending slip into it, because that portion generally isn’t deductible. Your accountant can tell you how the fees should be claimed.

After-tax cost is useful context. But do the subtraction in pre-tax dollars first — tax changes how much an option costs, not which one is cheaper.

A top-up done properly starts with the full picture

Extra money mid-term is a normal part of growing. A good top-up is priced on the new money, matched to a purpose and tied to an exit that still works. A poor one quietly re-charges you for what you already owe.

When you enquire with us, a real person looks at your current loan, the new need and your exit, and sets out the options in dollars — top-up, separate facility or waiting — so you can see which one makes sense. It takes about 60 seconds and there’s no credit check when you first enquire. We don’t send your details to a pile of lenders, so your phone won’t start ringing with offers. Please fill the form in accurately, including your existing loan and when it falls due, so the first option we put in front of you is the right one.

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