In short: A debt consolidation home loan rolls your car loan, personal loan and credit cards into your mortgage, usually cutting your monthly repayments sharply because home loan rates are far lower. The catch is that spreading $50,000 of short-term debt over 30 years can double the interest you pay. It works well only if you keep repayments high or use a separate short-term split.
If you are juggling a car loan, a couple of credit cards and a personal loan on top of your mortgage, the monthly total can be crushing even when each debt looks manageable on its own. Consolidating them into your home loan is a legitimate way to get breathing room, and for many Melbourne families it is the right move. But the way it is structured decides whether you save money or pay tens of thousands more. This guide shows you both outcomes with real figures, so you can choose the version that helps.
What debt consolidation through a home loan means
You refinance your mortgage for a larger amount, and the extra funds pay out your other debts at settlement. From then on you have one loan, one repayment and one rate. It can be done with your current lender as a "top-up" or by refinancing to a new lender.
The debts most commonly consolidated are:
- Car loans (secured or unsecured)
- Personal loans
- Credit cards and store cards
- Buy-now-pay-later balances
- Overdrafts
- In some cases, ATO tax debt or business debts
Lenders will want to see the payout figures for each debt and will usually pay them directly at settlement rather than giving you the cash.
The benefits
One repayment
Four direct debits on different dates become one. That alone reduces missed payments, which protects your credit file.
A much lower rate
Credit cards commonly charge around 20%, personal loans 8% to 15%, and car loans 7% to 12%. A home loan is well under all of them. On the same balance, the interest charged each month drops immediately.
Cashflow relief
Because the balance is spread over a long term at a lower rate, your total monthly outgoings can fall by $700 to $1,000 or more. If you are in mortgage stress, that relief can be the difference between keeping and losing the house.
The big con: 30 years of interest on a car
Here is the part lenders' marketing skips. A $25,000 car loan over five years costs about $6,000 in interest at 9%. The same $25,000 added to a 30-year mortgage at 6.00% costs about $29,000 in interest if you only make the minimum repayment, for a car that will be scrapped long before the loan is repaid.
The rate is lower, but the time is six times longer. Unless you keep paying the amount you were paying before, or shorten the term for the consolidated portion, consolidation costs you more in total.
Worked example: a Wollert family
The Sharma family in Wollert have a $380,000 home loan at 6.00% with 30 years remaining (illustration only). On top of it they have:
- A $25,000 car loan at 9% with 5 years remaining ($519 a month)
- $15,000 across two credit cards at 20%, on which they pay $450 a month
- A $10,000 personal loan at 12% with 4 years remaining ($263 a month)
Before consolidation
| Debt | Balance | Rate | Monthly repayment | Total interest to payout |
|---|---|---|---|---|
| Home loan | $380,000 | 6.00% | $2,278 | $440,185 |
| Car loan | $25,000 | 9.00% | $519 | $6,138 |
| Credit cards | $15,000 | 20.00% | $450 | $7,077 |
| Personal loan | $10,000 | 12.00% | $263 | $2,640 |
| Total | $430,000 | $3,510 | $456,040 |
After consolidation: three ways it can go
| Option | Monthly repayment | Time to clear everything | Total interest | Compared with before |
|---|---|---|---|---|
| A. Consolidate into 30-year home loan, pay the minimum | $2,578 | 30 years | $498,104 | $42,000 more |
| B. Consolidate into home loan, keep paying the old $3,510 | $3,510 | About 16 years | $237,176 | $219,000 less |
| C. Home loan as is, plus a $50,000 split over 5 years at 6.00% | $2,278 + $967 = $3,245 | Split cleared in 5 years, home loan in 30 | $440,185 + $7,998 = $448,183 | $7,900 less and $265 a month lower |
Option A gives the family $932 a month of relief, and that is genuinely valuable if they need it. But it costs $42,000 extra over the life of the loan. Option B keeps their payments identical to today and clears the whole lot 14 years early. Option C sits in between: modest relief, the short-term debts gone in five years, and the home loan untouched.
Most families land on B or C, or a mix: take some relief now and increase repayments when the budget allows. Model your own version with the debt consolidation calculator.
Your options for consolidating
Refinance everything into the home loan
The simplest structure and the lowest monthly repayment. Best if you are disciplined enough to keep paying extra, or if cashflow is the urgent problem. Our debt consolidation service handles the refinance and the payouts.
A separate split with a shorter term
Keep your existing home loan and add a second split for the consolidated debts, set to five or seven years. You get the home loan rate without the 30-year interest bill. On $50,000 at 6.00% for illustration, a 5-year split is $967 a month, a 7-year split is $730.
A personal loan consolidation
If you do not want to touch your mortgage, or your LVR is too high, a single personal loan can replace the credit cards and small debts at a lower rate than the cards. It will not match a home loan rate, but the term stays short. For the car specifically, refinancing the car loan on its own may also cut the rate without involving your home.
Hardship arrangements
If the real issue is that you cannot meet repayments at all, consolidation may not be approved and may not be the answer. You have financial hardship rights under the credit law: lenders must consider a request to vary your repayments. Use that first, then consolidate once things stabilise.
Who qualifies
LVR
The combined loan must usually stay at or below 80% of your property's value to avoid LMI. On a $560,000 Wollert house, that is $448,000 of total borrowing. If consolidation pushes you above 80%, LMI applies and the numbers may no longer work.
Serviceability
Lenders assess the new, larger loan at your rate plus the 3 percentage point APRA buffer. Ironically, some borrowers who are struggling under four separate repayments fail the assessment for one combined repayment that would be lower, because the assessment uses the buffered rate and the lender's own expense benchmarks. A broker can find the lender whose calculator treats your situation most fairly.
Credit file
Recent missed payments, defaults, or a string of credit enquiries make consolidation harder. Some specialist lenders will still lend at a higher rate. Read credit score and home loans to understand what lenders see.
Arrears
If you are currently behind on your home loan or the debts being consolidated, most mainstream lenders will decline. Bringing accounts up to date for three to six months first, even with a hardship arrangement, opens far more options.
Purpose and evidence
Lenders will ask for statements showing the balances and will want the debts paid out at settlement, and usually closed. Expect to be asked to cancel credit cards, not just clear them.
Checklist before you apply
- Current balance, rate and payout figure for every debt
- Your home loan statement showing balance and remaining term
- An estimate of your property's current value (a broker can order a free valuation)
- Your combined loan amount as a percentage of value (aim for 80% or below)
- Two recent payslips and three months of bank statements
- A realistic monthly repayment you will commit to after consolidation
- Whether you want a single loan or a separate short-term split
- Which credit cards you will close after payout
- Whether any debts are tax-related or business-related, which need different lenders
Common mistakes
Running the cards up again
The most expensive mistake. If you clear $15,000 of credit cards into your mortgage and then rebuild the same balance, you have both debts. Cancel the cards or reduce limits to something small at settlement.
Extending the term without a plan
Taking Option A above for the cashflow relief is fine if you have a plan to lift repayments within a year or two. Taking it because it looks cheaper and never revisiting it costs tens of thousands.
Consolidating close to retirement
If you are 55 and add $50,000 to a loan you hoped to clear by 65, the lender will look at how you will repay it, and you may be asked to show an exit strategy. A shorter split or a personal loan keeps the timeline realistic.
Refinancing above 80% LVR
If consolidation triggers LMI, the premium can wipe out the saving. Consider consolidating only the highest-rate debts and keeping the LVR under the line.
Ignoring the cause
Consolidation fixes the symptoms. If spending is consistently higher than income, the debts return. A budget review with a free financial counsellor through the MoneySmart website is worth doing alongside the refinance.
Frequently asked questions
Can I add my car loan to my mortgage?
Yes, if your property has enough equity and you can service the larger loan. The lender pays out the car loan at settlement and it becomes part of your home loan. The rate will be much lower, but if you spread the car over 30 years the total interest is higher than the original loan. Set up a separate split over five years, or keep paying the old car repayment, to avoid that.
Does debt consolidation hurt your credit score?
Briefly, then it usually helps. The new application registers as an enquiry, which can dip your score a few points. Once the cards and loans are paid out and closed, your file shows fewer accounts and lower limits, and one repayment is easier to keep on time than four. Missed payments do far more damage than a consolidation enquiry ever will.
Is it a good idea to consolidate debt into a home loan?
It is a good idea when you keep repayments high or use a short-term split, close the cards, and your LVR stays under 80%. It is a poor idea when you take the lowest possible repayment for 30 years, keep the cards open, or pay LMI to do it. The rate saving is real; the outcome depends on the structure and your habits afterwards.
How much can I consolidate?
As much as your equity and serviceability allow. Most lenders cap total borrowing at 80% of value without LMI, or up to 90% with it. So on a $600,000 property with a $400,000 loan, you could consolidate up to about $80,000 while staying under 80%. Some lenders also limit the "cash out" component or the number of debts, and all will assess whether you can afford the total.
Can I consolidate debt with bad credit?
Sometimes. Mainstream lenders generally decline applicants with recent defaults or arrears, but specialist and non-bank lenders will consider consolidation at a higher rate if you have equity and stable income. It can still be worthwhile if the rate is well below your credit cards. Once your file has been clean for a year or two, you can refinance again to a sharper lender.
Can I consolidate ATO tax debt into my home loan?
With some lenders, yes, on a case-by-case basis. Major banks are often reluctant, but several non-bank and specialist lenders will refinance ATO debt into a home loan if you have equity and can show the debt is being managed, ideally with a payment arrangement in place. Expect to provide your ATO statement and, if self-employed, up-to-date returns. A broker can identify which lenders are open to it.
Talk to GNT Finance
We will map out all three options above with your real figures so you can see the monthly relief and the long-term cost side by side. Gorakh Timilsina spent years as a senior credit officer assessing exactly these applications, so he knows which lenders say yes and how to structure the split so you are not paying for a car in 2050. We speak English, Nepali and Hindi and help families across Melbourne's north, including Wollert. Book a free consultation or call 0426 403 703.
This page is general information only and not legal, tax or financial advice. Laws change — confirm current rules with the State Revenue Office, the ATO or a licensed professional.
Written by Gorakh Timilsina
Founder, CEO & Senior Mortgage Consultant at GNT Finance. Gorakh started as a broker assistant, spent years as a senior credit officer assessing loan applications, and now helps Melbourne families get the right loan approved. English, Nepali and Hindi spoken.