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Debt consolidation calculator.

Rolling debts into your home loan swaps their high rates and short terms for the home loan’s lower rate over a much longer one. Enter up to three debts with their balance, rate and monthly repayment, then your home loan rate and the years left on it. The calculator shows what you would save each month and what it could cost you in extra interest over the longer term.

How many debts would you roll into your home loan?

2 debts

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How this calculator works.

  1. Each debt is run off at its own interest rate and current repayment, to work out how long it takes to clear and how much interest it costs. A debt whose repayment does not even cover its interest is flagged.
  2. The combined balance is then treated as an extra amount on your home loan, repaid as principal & interest over the years you have left, at your home loan rate.
  3. The monthly saving is what you pay on the debts now less the extra home loan repayment. The extra interest is the interest on the rolled-in balance over the home loan term less the interest on the debts as they stand.
  4. The calculator also shows a third option: keep paying what you pay now, into the home loan. That keeps the monthly outgoing the same but clears the debt much sooner.

What it assumes

  • The starting scenario is 2 debts: $8,000 at 20% and $20,000 at 9%, rolled into a home loan at 6.44% (the RBA average new variable rate for Jul 2026, adjusted for the 30 Sep rise) with 25 years left.
  • The rates and repayments are held constant.
  • Fees, lenders mortgage insurance and whether a lender will lend the extra are not included.
  • Assumptions last reviewed 25 September 2026.

Questions people ask.

Does consolidating debt into my home loan save money?

It usually lowers what you pay each month, but it often costs more in total. With the starting numbers you would free up about $562 a month, yet pay about $21,315 more in interest, because the debts would be paid off over the 25 years left on the home loan.

How can I keep the saving without paying more interest?

Keep paying the same total amount you paid on the debts, but into the home loan. Because the home loan rate is lower, the rolled-in debt is cleared sooner and for less interest than the debts as they stand. The calculator shows how long that takes.

Which debts can I consolidate?

Commonly credit cards, store cards, personal loans and car loans. What a lender will roll in depends on its policy and on your loan-to-value ratio, so ask before you assume.

Will consolidating affect my borrowing power?

It changes your commitments. Closing cards and clearing loans removes their repayments and limits from a lender’s assessment, while the larger home loan adds a bigger repayment. Lenders will assess the whole picture.

Are there fees to consolidate?

There can be: a refinance or top-up fee, valuation fees and, if the new loan is over 80% of the property’s value, lenders mortgage insurance. None of these is included here.

What if one of my repayments is less than the interest?

Then that debt would never be cleared at that repayment. The calculator flags it and compares repayments only, since the total interest on that debt cannot be worked out.

More calculators.

Debt Consolidation Calculator | Siare